1
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Kharintsev SS, Battalova EI, Noskov AI, Merham J, Potma EO, Fishman DA. Photon-Momentum-Enabled Electronic Raman Scattering in Silicon Glass. ACS Nano 2024; 18:9557-9565. [PMID: 38437629 DOI: 10.1021/acsnano.3c12666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/06/2024]
Abstract
The nature of enhanced photoemission in disordered and amorphous solids is an intriguing question. A point in case is light emission in porous and nanostructured silicon, a phenomenon that is still not fully understood. In this work, we study structural photoemission in heterogeneous cross-linked silicon glass, a material that represents an intermediate state between the amorphous and crystalline phases, characterized by a narrow distribution of structure sizes. This model system shows a clear dependence of photoemission on size and disorder across a broad range of energies. While phonon-assisted indirect optical transitions are insufficient to describe observable emissions, our experiments suggest these can be understood through electronic Raman scattering instead. This phenomenon, which is not commonly observed in crystalline semiconductors, is driven by structural disorder. We attribute photoemission in this disordered system to the presence of an excess electron density of states within the forbidden gap (Urbach bridge) where electrons occupy trapped states. Transitions from gap states to the conduction band are facilitated through electron-photon momentum matching, which resembles Compton scattering but is observed for visible light and driven by the enhanced momentum of a photon confined within the nanostructured domains. We interpret the light emission in structured silicon glass as resulting from electronic Raman scattering. These findings emphasize the role of photon momentum in the optical response of solids that display disorder on the nanoscale.
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Affiliation(s)
- Sergey S Kharintsev
- Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan 420008, Russia
| | - Elina I Battalova
- Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan 420008, Russia
| | - Aleksey I Noskov
- Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kazan 420008, Russia
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Jovany Merham
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Eric O Potma
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Dmitry A Fishman
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
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2
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Dalton AB, Fishman DA, Nizkorodov SA. Ultrafast Excited-State Proton Transfer in 4-Nitrocatechol: Implications for the Photochemistry of Nitrophenols. J Phys Chem A 2023; 127:8307-8315. [PMID: 37773630 DOI: 10.1021/acs.jpca.3c04322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/01/2023]
Abstract
Nitrophenols are a class of environmental contaminants that exhibit strong absorption at atmospherically relevant wavelengths, prompting many studies of their photochemical degradation rates and mechanisms. Despite the importance of photochemical reactions of nitrophenols in the environment, the ultrafast processes in electronically excited nitrophenols are not well understood. Here, we present an experimental study of ultrafast electron dynamics in 4-nitrocatechol (4NC), a common product of biomass burning and fossil fuel combustion. The experiments are accompanied by time-dependent quantum mechanical calculations to help assign the observed transitions in static and transient absorption spectra and to estimate the rates of singlet-to-triplet intersystem crossing. Our results suggest that electronic triplet states are not efficiently populated upon 340 nm excitation, as efficient proton transfer occurs in the excited state on a time scale of a few picoseconds in water and tens of picoseconds in 2-propanol. This suggests that triplet states do not play a significant role in the photochemical reactions of 4NC in the environment and, by extension, in nitrophenols in general. Instead, consideration should be given to the idea that this class of molecules may serve as strong photoacids.
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Affiliation(s)
- Avery B Dalton
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
| | - Sergey A Nizkorodov
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, United States
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3
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Kuang Y, Yao ZF, Lim S, Ngo C, Rocha MA, Fishman DA, Ardoña HAM. Biomimetic Sequence-Templating Approach toward a Multiscale Modulation of Chromogenic Polymer Properties. Macromolecules 2023; 56:4526-4540. [PMID: 37397164 PMCID: PMC10311629 DOI: 10.1021/acs.macromol.3c00403] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2023] [Revised: 05/28/2023] [Indexed: 07/04/2023]
Abstract
Precision control via molecular structure over adaptive conjugated polymer properties in aqueous environments is critical for realizing their biomedical applications. Here, we unravel the dependence of amphiphilic peptide-polydiacetylene (PDA) conjugate properties on the characteristic steric and hydrophobic contributions within peptide segments that serve as a biomimetic template for diacetylene polymerization in water. We investigated the functional impacts of molecular volume and polarity changes brought by dipeptide substitution domains on the following peptide-PDA material properties at multiple length scales: supramolecular assembly behavior, chain conformation-dependent photophysical properties, cell-material interfacing, and for the first time, bulk electrical properties of their films processed in water. A library of peptide-PDAs with systematically varied sequences show that the contributions of steric effects predominantly influence the electronic structure and resulting trends in photophysical properties, while the interplay between size and hydrophobicity of individual residues becomes more significant for higher-order assemblies affecting bulk properties. This work demonstrates sequence-tunable molecular volume and polarity as synthetic handles to rationally modulate PDA material properties across length scales, providing insights into the programmability of biomimetic conjugated polymers with adaptive functionalities.
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Affiliation(s)
- Yuyao Kuang
- Department
of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Ze-Fan Yao
- Department
of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
- Department
of Biomedical Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Sujeung Lim
- Department
of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Catherine Ngo
- Department
of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
| | - Megan Alma Rocha
- Department
of Chemistry, School of Physical Sciences, University of California, Irvine, Irvine, California 92697, United States
| | - Dmitry A. Fishman
- Department
of Chemistry, School of Physical Sciences, University of California, Irvine, Irvine, California 92697, United States
| | - Herdeline Ann M. Ardoña
- Department
of Chemical and Biomolecular Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
- Department
of Biomedical Engineering, Samueli School of Engineering, University of California, Irvine, Irvine, California 92697, United States
- Department
of Chemistry, School of Physical Sciences, University of California, Irvine, Irvine, California 92697, United States
- Sue
& Bill Gross Stem Cell Research Center, University of California, Irvine, Irvine, California 92697, United States
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4
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Kharintsev SS, Battalova EI, Mukhametzyanov TA, Pushkarev AP, Scheblykin IG, Makarov SV, Potma EO, Fishman DA. Light-Controlled Multiphase Structuring of Perovskite Crystal Enabled by Thermoplasmonic Metasurface. ACS Nano 2023; 17:9235-9244. [PMID: 36976247 DOI: 10.1021/acsnano.3c00373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Halide perovskites belong to an important family of semiconducting materials with electronic properties that enable a myriad of applications, especially in photovoltaics and optoelectronics. Their optical properties, including photoluminescence quantum yield, are affected and notably enhanced at crystal imperfections where the symmetry is broken and the density of states increases. These lattice distortions can be introduced through structural phase transitions, allowing charge gradients to appear near the interfaces between phase structures. In this work, we demonstrate controlled multiphase structuring in a single perovskite crystal. The concept uses cesium lead bromine (CsPbBr3) placed on a thermoplasmonic TiN/Si metasurface and enables single-, double-, and triple-phase structures to form on demand above room temperature. This approach promises application horizons of dynamically controlled heterostructures with distinctive electronic and enhanced optical properties.
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Affiliation(s)
- Sergey S Kharintsev
- Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kremlevskaya, 16, Kazan 420008, Russia
| | - Elina I Battalova
- Department of Optics and Nanophotonics, Institute of Physics, Kazan Federal University, Kremlevskaya, 16, Kazan 420008, Russia
| | - Timur A Mukhametzyanov
- Department of Physical Chemistry, Institute of Chemistry, Kazan Federal University, Kremlevskaya, 18, Kazan 420008, Russia
| | - Anatoly P Pushkarev
- School of Physics and Engineering, ITMO University, St. Petersburg 197101, Russia
| | | | - Sergey V Makarov
- School of Physics and Engineering, ITMO University, St. Petersburg 197101, Russia
- Qingdao Innovation and Development Center, Harbin Engineering University, Qingdao 266000, Shandong, People's Republic of China
| | - Eric O Potma
- Department of Chemistry, University of California, Irvine, California 92697, United States
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, California 92697, United States
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5
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Knez D, Toulson BW, Chen A, Ettenberg MH, Nguyen H, Potma EO, Fishman DA. Spectral imaging at high definition and high speed in the mid-infrared. Sci Adv 2022; 8:eade4247. [PMID: 36383646 PMCID: PMC9668290 DOI: 10.1126/sciadv.ade4247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 10/20/2022] [Indexed: 06/16/2023]
Abstract
Spectral imaging in the mid-infrared (MIR) range provides simultaneous morphological and chemical information of a wide variety of samples. However, current MIR technologies struggle to produce high-definition images over a broad spectral range at acquisition rates that are compatible with real-time processes. We present a novel spectral imaging technique based on nondegenerate two-photon absorption of temporally chirped optical MIR pulses. This approach avoids complex image processing or reconstruction and enables high-speed acquisition of spectral data cubes (xyω) at high-pixel density in under a second.
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Affiliation(s)
- David Knez
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Benjamin W. Toulson
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Anabel Chen
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Martin H. Ettenberg
- Princeton Infrared Technologies Inc., 7 Deerpark Dr. Suite E, Monmouth Junction, NJ 08852, USA
| | - Hai Nguyen
- Princeton Infrared Technologies Inc., 7 Deerpark Dr. Suite E, Monmouth Junction, NJ 08852, USA
| | - Eric O. Potma
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA
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6
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Carpenter B, Talosig AR, Mulvey JT, Merham JG, Esquivel J, Rose B, Ogata AF, Fishman DA, Patterson JP. Role of Molecular Modification and Protein Folding in the Nucleation and Growth of Protein-Metal-Organic Frameworks. Chem Mater 2022; 34:8336-8344. [PMID: 36193290 PMCID: PMC9523577 DOI: 10.1021/acs.chemmater.2c01903] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/06/2022] [Indexed: 06/16/2023]
Abstract
Metal-organic frameworks (MOFs) are a class of porous nanomaterials that have been extensively studied as enzyme immobilization substrates. During in situ immobilization, MOF nucleation is driven by biomolecules with low isoelectric points. Investigation of how biomolecules control MOF self-assembly mechanisms on the molecular level is key to designing nanomaterials with desired physical and chemical properties. Here, we demonstrate how molecular modifications of bovine serum albumin (BSA) with fluorescein isothiocyanate (FITC) can affect MOF crystal size, morphology, and encapsulation efficiency. Final crystal properties are characterized using scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), fluorescent microscopy, and fluorescence spectroscopy. To probe MOF self-assembly, in situ experiments were performed using cryogenic transmission electron microscopy (cryo-TEM) and X-ray diffraction (XRD). Biophysical characterization of BSA and FITC-BSA was performed using ζ potential, mass spectrometry, circular dichroism studies, fluorescence spectroscopy, and Fourier transform infrared (FTIR) spectroscopy. The combined data reveal that protein folding and stability within amorphous precursors are contributing factors in the rate, extent, and mechanism of crystallization. Thus, our results suggest molecular modifications as promising methods for fine-tuning protein@MOFs' nucleation and growth.
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Affiliation(s)
- Brooke
P. Carpenter
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - A. Rain Talosig
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Justin T. Mulvey
- Department
of Materials Science and Engineering, University
of California Irvine, Irvine, California 92697-2025, United States
| | - Jovany G. Merham
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Jamie Esquivel
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Ben Rose
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Alana F. Ogata
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Dmitry A. Fishman
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
| | - Joseph P. Patterson
- Department
of Chemistry, University of California Irvine, Irvine, California 92697-2025, United States
- Department
of Materials Science and Engineering, University
of California Irvine, Irvine, California 92697-2025, United States
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7
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Norton-Baker B, Rocha MA, Granger-Jones J, Fishman DA, Martin RW. Human γS-Crystallin Resists Unfolding Despite Extensive Chemical Modification from Exposure to Ionizing Radiation. J Phys Chem B 2022; 126:679-690. [PMID: 35021623 PMCID: PMC9977691 DOI: 10.1021/acs.jpcb.1c08157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Ionizing radiation has dramatic effects on living organisms, causing damage to proteins, DNA, and other cellular components. γ radiation produces reactive oxygen species (ROS) that damage biological macromolecules. Protein modification due to interactions with hydroxyl radical is one of the most common deleterious effects of radiation. The human eye lens is particularly vulnerable to the effects of ionizing radiation, as it is metabolically inactive and its proteins are not recycled after early development. Therefore, radiation damage accumulates and eventually can lead to cataract formation. Here we explore the impact of γ radiation on a long-lived structural protein. We exposed the human eye lens protein γS-crystallin (HγS) to high doses of γ radiation and investigated the chemical and structural effects. HγS accumulated many post-translational modifications (PTMs), appearing to gain significant oxidative damage. Biochemical assays suggested that cysteines were affected, with the concentration of free thiol reduced with increasing γ radiation exposure. SDS-PAGE analysis showed that irradiated samples form protein-protein cross-links, including nondisulfide covalent bonds. Tandem mass spectrometry on proteolytic digests of irradiated samples revealed that lysine, methionine, tryptophan, leucine, and cysteine were oxidized. Despite these chemical modifications, HγS remained folded past 10.8 kGy of γ irradiation as evidenced by circular dichroism and intrinsic tryptophan fluorescence spectroscopy.
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Affiliation(s)
- Brenna Norton-Baker
- These authors contributed equally.,Department of Chemistry, University of California, Irvine, CA 92697-2025, USA
| | - Megan A. Rocha
- These authors contributed equally.,Department of Chemistry, University of California, Irvine, CA 92697-2025, USA
| | | | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, CA 92697-2025, USA
| | - Rachel W. Martin
- Department of Chemistry, University of California, Irvine, CA 92697-2025, USA,Department of Molecular Biology and Biochemistry, University of California, Irvine, CA 92697-3900, USA
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8
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Han H, Nakaoka HJ, Hofmann L, Zhou JJ, Yu C, Zeng L, Nan J, Seo G, Vargas RE, Yang B, Qi R, Bardwell L, Fishman DA, Cho KWY, Huang L, Luo R, Warrior R, Wang W. The Hippo pathway kinases LATS1 and LATS2 attenuate cellular responses to heavy metals through phosphorylating MTF1. Nat Cell Biol 2022; 24:74-87. [PMID: 35027733 PMCID: PMC9022944 DOI: 10.1038/s41556-021-00813-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 11/08/2021] [Indexed: 12/11/2022]
Abstract
Heavy metals are both integral parts of cells and environmental toxicants, and their deregulation is associated with severe cellular dysfunction and various diseases. Here we show that the Hippo pathway plays a critical role in regulating heavy metal homeostasis. Hippo signalling deficiency promotes the transcription of heavy metal response genes and protects cells from heavy metal-induced toxicity, a process independent of its classic downstream effectors YAP and TAZ. Mechanistically, the Hippo pathway kinase LATS phosphorylates and inhibits MTF1, an essential transcription factor in the heavy metal response, resulting in the loss of heavy metal response gene transcription and cellular protection. Moreover, LATS activity is inhibited following heavy metal treatment, where accumulated zinc directly binds and inhibits LATS. Together, our study reveals an interplay between the Hippo pathway and heavy metals, providing insights into this growth-related pathway in tissue homeostasis and stress response.
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Affiliation(s)
- Han Han
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Hiroki J Nakaoka
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Line Hofmann
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Jeff Jiajing Zhou
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Clinton Yu
- Department of Physiology and Biophysics, University of California, Irvine, Irvine, CA, USA
| | - Lisha Zeng
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
| | - Junyu Nan
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
| | - Gayoung Seo
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | | | - Bing Yang
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Ruxi Qi
- Cryo-EM Center, Southern University of Science and Technology, Shenzhen, China
| | - Lee Bardwell
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, Irvine, CA, USA
| | - Ken W Y Cho
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA
| | - Lan Huang
- Department of Physiology and Biophysics, University of California, Irvine, Irvine, CA, USA
| | - Ray Luo
- Department of Molecular Biology and Biochemistry, University of California, Irvine, Irvine, CA, USA
- Department of Chemical and Biomolecular Engineering, University of California, Irvine, Irvine, CA, USA
- Department of Materials Science and Engineering, University of California, Irvine, Irvine, CA, USA
- Department of Biomedical Engineering, University of California, Irvine, Irvine, CA, USA
| | - Rahul Warrior
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA.
| | - Wenqi Wang
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA, USA.
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9
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Rigsby EM, Miyashita T, Fishman DA, Roberts ST, Tang ML. CdSe nanocrystal sensitized photon upconverting film. RSC Adv 2021; 11:31042-31046. [PMID: 35498919 PMCID: PMC9041432 DOI: 10.1039/d1ra06562a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 09/10/2021] [Indexed: 12/25/2022] Open
Abstract
Here, films using CdSe nanocrystal (NC) triplet photosensitizers in conjunction with diphenylanthracene (DPA) emitters were assembled to address several challenges to practical applications for solution-based photon upconversion. By using poly(9-vinylcarbazole) as a phosphorescent host in this film, volatile organic solvents are eliminated, the spontaneous crystallization of the emitter is significantly retarded, and ∼1.5% photon upconversion quantum yield (out of a maximum of 50%) is obtained. Transient absorption spectroscopy on nanosecond-to-microsecond time scales reveals this efficiency is enabled by an exceptionally long triplet lifetime of 3.4 ± 0.3 ms. Ultimately, we find the upconversion efficiency is limited by incomplete triplet–triplet annihilation, which occurs with a rate 3–4 orders of magnitude slower than in solution-phase upconversion systems. Here, films using CdSe nanocrystal (NC) triplet photosensitizers in conjunction with diphenylanthracene (DPA) emitters doe for the conversion of green to blue light.![]()
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Affiliation(s)
- Emily M Rigsby
- Department of Chemistry, University of California Riverside Riverside CA 92521 USA
| | - Tsumugi Miyashita
- Department of Bioengineering, University of California Riverside Riverside CA 92521 USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California Irvine California 92697 USA
| | - Sean T Roberts
- Department of Chemistry, University of Texas at Austin Austin TX 78712 USA
| | - Ming L Tang
- Department of Chemistry, University of California Riverside Riverside CA 92521 USA
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10
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Potma EO, Knez D, Ettenberg M, Wizeman M, Nguyen H, Sudol T, Fishman DA. High-speed 2D and 3D mid-IR imaging with an InGaAs camera. APL Photonics 2021; 6:096108. [PMID: 35498553 PMCID: PMC9026176 DOI: 10.1063/5.0061661] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 08/26/2021] [Indexed: 06/12/2023]
Abstract
Recent work on mid-infrared (MIR) detection through the process of non-degenerate two-photon absorption (NTA) in semiconducting materials has shown that wide-field MIR imaging can be achieved with standard Si cameras. While this approach enables MIR imaging at high pixel densities, the low nonlinear absorption coefficient of Si prevents fast NTA-based imaging at lower illumination doses. Here, we overcome this limitation by using InGaAs as the photosensor. Taking advantage of the much higher nonlinear absorption coefficient of this direct bandgap semiconductor, we demonstrate high-speed MIR imaging up to 500 fps with under 1 ms exposure per frame, enabling 2D or 3D mapping without pre- or post-processing of the image.
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Affiliation(s)
- Eric O. Potma
- Department of Chemistry, University of California Irvine, Irvine, California 92697, USA
| | - David Knez
- Department of Chemistry, University of California Irvine, Irvine, California 92697, USA
| | - Martin Ettenberg
- Princeton Infrared Technologies, Monmouth Junction, New Jersey 08852, USA
| | - Matthew Wizeman
- Princeton Infrared Technologies, Monmouth Junction, New Jersey 08852, USA
| | - Hai Nguyen
- Princeton Infrared Technologies, Monmouth Junction, New Jersey 08852, USA
| | - Tom Sudol
- Princeton Infrared Technologies, Monmouth Junction, New Jersey 08852, USA
| | - Dmitry A. Fishman
- Department of Chemistry, University of California Irvine, Irvine, California 92697, USA
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11
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Liu Y, Asset T, Chen Y, Murphy E, Potma EO, Matanovic I, Fishman DA, Atanassov P. Facile All-Optical Method for In Situ Detection of Low Amounts of Ammonia. iScience 2020; 23:101757. [PMID: 33241202 PMCID: PMC7674512 DOI: 10.1016/j.isci.2020.101757] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 10/20/2020] [Accepted: 10/28/2020] [Indexed: 11/20/2022] Open
Abstract
As a key precursor for nitrogenous compounds and fertilizer, ammonia affects our lives in numerous ways. Rapid and sensitive detection of ammonia is essential, both in environmental monitoring and in process control for industrial production. Here we report a novel and nonperturbative method that allows rapid detection of ammonia at low concentrations, based on the all-optical detection of surface-enhanced Raman signals. We show that this simple and affordable approach enables ammonia probing at selected regions of interest with high spatial resolution, making in situ and operando observations possible. Novel method for detection of ammonia at concentrations below 1 ppm in just under 1 s This approach allows local detection of ammonia amounts as low as 104–105 molecules Method for sensitive direct monitoring of catalytic/electrocatalytic processes The method allows following the dynamics of ammonia concentration change in real time
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Affiliation(s)
- Yuanchao Liu
- Department of Chemical & Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California, Irvine, CA 92697, USA
| | - Tristan Asset
- Department of Chemical & Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California, Irvine, CA 92697, USA
| | - Yechuan Chen
- Department of Chemical & Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California, Irvine, CA 92697, USA
| | - Eamonn Murphy
- Department of Chemical & Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California, Irvine, CA 92697, USA
| | - Eric O Potma
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Ivana Matanovic
- Department of Chemical and Biological Engineering, University of New Mexico, Albuquerque, NM 87131, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Plamen Atanassov
- Department of Chemical & Biomolecular Engineering, National Fuel Cell Research Center (NFCRC), University of California, Irvine, CA 92697, USA
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12
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Rigsby EM, Miyashita T, Jaimes P, Fishman DA, Tang ML. On the size-dependence of CdSe nanocrystals for photon upconversion with anthracene. J Chem Phys 2020; 153:114702. [PMID: 32962360 DOI: 10.1063/5.0017585] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
In triplet-triplet annihilation based photon upconversion, controlling triplet energy transfer (TET) through the system is key to unlocking higher efficiencies. In this work, we vary the size of colloidally synthesized CdSe nanocrystals (NCs) to examine the effects on TET during photon upconversion, using steady-state measurements and transient absorption spectroscopy. As the CdSe NC size increases, the photon upconversion quantum yield (QY) decreases due to the decrease in the rate of TET from CdSe to the surface bound anthracene transmitter ligand, as expected for the Marcus description of energy transfer from the transmitter to the NC. Long microsecond transmitter lifetimes are critical to high photon upconversion QYs.
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Affiliation(s)
- Emily M Rigsby
- Department of Chemistry, University of California, Riverside, Riverside, California 92521, USA
| | - Tsumugi Miyashita
- Department of Bioengineering, University of California, Riverside, Riverside, California 92521, USA
| | - Paulina Jaimes
- Department of Chemistry, University of California, Riverside, Riverside, California 92521, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, Irvine, California 92697, USA
| | - Ming Lee Tang
- Department of Chemistry, University of California, Riverside, Riverside, California 92521, USA
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13
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Knez D, Hanninen AM, Prince RC, Potma EO, Fishman DA. Infrared chemical imaging through non-degenerate two-photon absorption in silicon-based cameras. Light Sci Appl 2020; 9:125. [PMID: 32704358 PMCID: PMC7371741 DOI: 10.1038/s41377-020-00369-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 05/08/2023]
Abstract
Chemical imaging based on mid-infrared (MIR) spectroscopic contrast is an important technique with a myriad of applications, including biomedical imaging and environmental monitoring. Current MIR cameras, however, lack performance and are much less affordable than mature Si-based devices, which operate in the visible and near-infrared regions. Here, we demonstrate fast MIR chemical imaging through non-degenerate two-photon absorption (NTA) in a standard Si-based charge-coupled device (CCD). We show that wide-field MIR images can be obtained at 100 ms exposure times using picosecond pulse energies of only a few femtojoules per pixel through NTA directly on the CCD chip. Because this on-chip approach does not rely on phase matching, it is alignment-free and does not necessitate complex postprocessing of the images. We emphasize the utility of this technique through chemically selective MIR imaging of polymers and biological samples, including MIR videos of moving targets, physical processes and live nematodes.
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Affiliation(s)
- David Knez
- Department of Chemistry, University of California, Irvine, CA 92697 USA
| | - Adam M. Hanninen
- Department of Chemistry, University of California, Irvine, CA 92697 USA
| | - Richard C. Prince
- Department of Biomedical Engineering, University of California, Irvine, CA 92697 USA
| | - Eric O. Potma
- Department of Chemistry, University of California, Irvine, CA 92697 USA
- Department of Biomedical Engineering, University of California, Irvine, CA 92697 USA
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, CA 92697 USA
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14
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Engelbrekt C, Crampton KT, Fishman DA, Law M, Apkarian VA. Efficient Plasmon-Mediated Energy Funneling to the Surface of Au@Pt Core-Shell Nanocrystals. ACS Nano 2020; 14:5061-5074. [PMID: 32167744 DOI: 10.1021/acsnano.0c01653] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
The structure and ultrafast photodynamics of ∼8 nm Au@Pt core-shell nanocrystals with ultrathin (<3 atomic layers) Pt-Au alloy shells are investigated to show that they meet the design principles for efficient bimetallic plasmonic photocatalysis. Photoelectron spectra recorded at two different photon energies are used to determine the radial concentration profile of the Pt-Au shell and the electron density near the Fermi energy, which play a key role in plasmon damping and electronic and thermal conductivity. Transient absorption measurements track the flow of energy from the plasmonic core to the electronic manifold of the Pt shell and back to the lattice of the core in the form of heat. We show that strong coupling to the high density of Pt(d) electrons at the Fermi level leads to accelerated dephasing of the Au plasmon on the femtosecond time scale, electron-electron energy transfer from Au(sp) core electrons to Pt(d) shell electrons on the sub-picosecond time scale, and enhanced thermal resistance on the 50 ps time scale. Electron-electron scattering efficiently funnels hot carriers into the ultrathin catalytically active shell at the nanocrystal surface, making them available to drive chemical reactions before losing energy to the lattice via electron-phonon scattering on the 2 ps time scale. The combination of strong broadband light absorption, enhanced electromagnetic fields at the catalytic metal sites, and efficient delivery of hot carriers to the catalyst surface makes core-shell nanocrystals with plasmonic metal cores and ultrathin catalytic metal shells promising nanostructures for the realization of high-efficiency plasmonic catalysts.
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Affiliation(s)
- Christian Engelbrekt
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
- Department of Chemistry, Technical University of Denmark, Kongens Lyngby, 2800, Denmark
| | - Kevin T Crampton
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Dmitry A Fishman
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Matt Law
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
| | - Vartkess Ara Apkarian
- Department of Chemistry, University of California Irvine, Irvine, California 92697, United States
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15
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Ogata AF, Rakowski AM, Carpenter BP, Fishman DA, Merham JG, Hurst PJ, Patterson JP. Direct Observation of Amorphous Precursor Phases in the Nucleation of Protein–Metal–Organic Frameworks. J Am Chem Soc 2020; 142:1433-1442. [DOI: 10.1021/jacs.9b11371] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Alana F. Ogata
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Alexander M. Rakowski
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Brooke P. Carpenter
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Jovany G. Merham
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Paul J. Hurst
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
| | - Joseph P. Patterson
- Department of Chemistry, University of California, Irvine, Irvine, California 92697-2025, United States
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16
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Rigsby EM, Lee K, Sun J, Fishman DA, Tang ML. Primary amines enhance triplet energy transfer from both the band edge and trap state from CdSe nanocrystals. J Chem Phys 2019; 151:174701. [DOI: 10.1063/1.5125021] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Affiliation(s)
- Emily M. Rigsby
- Department of Chemistry, University of California, Riverside, California, 92521, USA
| | - Kevin Lee
- Department of Chemistry, University of California, Riverside, California, 92521, USA
| | - Jefferson Sun
- Department of Chemistry, University of California, Riverside, California, 92521, USA
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, California 92697, USA
| | - Ming L. Tang
- Department of Chemistry, University of California, Riverside, California, 92521, USA
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17
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Pitre SP, Muuronen M, Fishman DA, Overman LE. Tertiary Alcohols as Radical Precursors for the Introduction of Tertiary Substituents into Heteroarenes. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00405] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Spencer P. Pitre
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Mikko Muuronen
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Dmitry A. Fishman
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
| | - Larry E. Overman
- Department of Chemistry, University of California, Irvine, California 92697-2025, United States
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18
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Smith JN, Edgar JM, Balk JM, Iftikhar M, Fong JC, Olsen TJ, Fishman DA, Majumdar S, Weiss GA. Directed evolution and biophysical characterization of a full-length, soluble, human caveolin-1 variant. Biochim Biophys Acta Proteins Proteom 2018; 1866:963-972. [PMID: 29857161 DOI: 10.1016/j.bbapap.2018.05.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2017] [Revised: 05/16/2018] [Accepted: 05/24/2018] [Indexed: 12/22/2022]
Abstract
Protein engineering by directed evolution can alter proteins' structures, properties, and functions. However, membrane proteins, despite their importance to living organisms, remain relatively unexplored as targets for protein engineering and directed evolution. This gap in capabilities likely results from the tendency of membrane proteins to aggregate and fail to overexpress in bacteria cells. For example, the membrane protein caveolin-1 has been implicated in many cell signaling pathways and diseases, yet the full-length protein is too aggregation-prone for detailed mutagenesis, directed evolution, and biophysical characterization. Using a phage-displayed library of full-length caveolin-1 variants, directed evolution with alternating subtractive and functional selections isolated a full-length, soluble variant, termed cavsol, for expression in E. coli. Cavsol folds correctly and binds to its known protein ligands HIV gp41, the catalytic domain of cAMP-dependent protein kinase A, and the polymerase I and transcript release factor. As expected, cavsol does not bind off-target proteins. Cellular studies show that cavsol retains the parent protein's ability to localize at the cellular membrane. Unlike truncated versions of caveolin, cavsol forms large, oligomeric complexes consisting of approximately >50 monomeric units without requiring additional cellular components. Cavsol's secondary structure is a mixture of α-helices and β-strands. Isothermal titration calorimetry experiments reveal that cavsol binds to gp41 and PKA with low micromolar binding affinity (KD). In addition to the insights into caveolin structure and function, the approach applied here could be generalized to other membrane proteins.
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Affiliation(s)
- Joshua N Smith
- Department of Molecular Biology and Biochemistry,University of California, Irvine, CA 92697, USA
| | - Joshua M Edgar
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - J Mark Balk
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Mariam Iftikhar
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Jessica C Fong
- Department of Pharmaceutical Sciences, University of California, Irvine, CA 92697, USA
| | - Tivoli J Olsen
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Sudipta Majumdar
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Gregory A Weiss
- Department of Molecular Biology and Biochemistry,University of California, Irvine, CA 92697, USA; Department of Chemistry, University of California, Irvine, CA 92697, USA.
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19
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Toulson BW, Fishman DA, Murray C. Photodissociation dynamics of acetone studied by time-resolved ion imaging and photofragment excitation spectroscopy. Phys Chem Chem Phys 2018; 20:2457-2469. [PMID: 29313039 DOI: 10.1039/c7cp07320h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The photodissociation dynamics of acetone has been investigated using velocity-map ion imaging and photofragment excitation (PHOFEX) spectroscopy across a range of wavelengths spanning the first absorption band (236-308 nm). The radical products of the Norrish Type I dissociation, methyl and acetyl, as well as the molecular product ketene have been detected by single-photon VUV ionization at 118 nm. Ketene appears to be formed with non-negligible yield at all wavelengths, with a maximum value of Φ ≈ 0.3 at 280 nm. The modest translational energy release is inconsistent with dissociation over high barriers on the S0 surface, and ketene formation is tentatively assigned to a roaming pathway involving frustrated dissociation to the radical products. Fast-moving radical products are detected at λ ≤ 305 nm with total translational energy distributions that extend to the energetic limit, consistent with dissociation occurring near-exclusively on the T1 surface following intersystem crossing. At energies below the T1 barrier a statistical component indicative of S0 dissociation is observed, although dissociation via the S1/S0 conical intersection is absent at shorter wavelengths, in contrast to acetaldehyde. The methyl radical yield is enhanced over that of acetyl in PHOFEX spectra at λ ≤ 260 nm due to the onset of secondary dissociation of internally excited acetyl radicals. Time-resolved ion imaging experiments using picosecond duration pulses at 266 nm find an appearance time constant of τ = 1490 ± 140 ps for CH3 radicals formed on T1. The associated rate is representative of S1 → T1 intersystem crossing. At 284 nm, CH3 is formed on T1 with two distinct timescales: a fast <10 ns component is accompanied by a slower component with τ = 42 ± 7 ns. A two-step mechanism involving fast internal conversion, followed by slower intersystem crossing (S1 → S0 → T1) is proposed to explain the slow component.
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Affiliation(s)
- Benjamin W Toulson
- Department of Chemistry, University of California, Irvine, Irvine, CA 92697, USA.
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20
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Steinhardt RC, Steeves TM, Wallace BM, Moser B, Fishman DA, Esser-Kahn AP. Photothermal Nanoparticle Initiation Enables Radical Polymerization and Yields Unique, Uniform Microfibers with Broad Spectrum Light. ACS Appl Mater Interfaces 2017; 9:39034-39039. [PMID: 29040810 DOI: 10.1021/acsami.7b12230] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Photothermal processes are utilized across a variety of fields, from separations to medicine, and are an area of active research. Herein, the action of a solar simulator upon carbon black nanoparticles is shown to result in photothermally initiated chain-growth polymerization of methyl acrylate, butyl acrylate, and methyl methacrylate initiated by benzoyl peroxide. With use of methyl acrylate as the model system, products from this reaction are shown to be apparently indistinguishable on the molecular level, but result in unique microstructures relative to the thermal controls. The relative contribution of bands of the UV/visible spectrum to the polymerization initiation show that red/infrared wavelengths are most important for the initiation to occur. Kinetic analysis of the initiator homolysis indicate that the apparent reaction rate is accelerated in the photothermal condition.
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Affiliation(s)
| | | | | | - Brittany Moser
- University of Chicago , Chicago, Illinois 60637, United States
| | - Dmitry A Fishman
- University of California, Irvine , Irvine, California 92697, United States
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21
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Gray V, Xia P, Huang Z, Moses E, Fast A, Fishman DA, Vullev VI, Abrahamsson M, Moth-Poulsen K, Lee Tang M. CdS/ZnS core-shell nanocrystal photosensitizers for visible to UV upconversion. Chem Sci 2017; 8:5488-5496. [PMID: 28970929 PMCID: PMC5613741 DOI: 10.1039/c7sc01610g] [Citation(s) in RCA: 80] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Accepted: 05/30/2017] [Indexed: 12/29/2022] Open
Abstract
Herein we report the first example of nanocrystal (NC) sensitized triplet-triplet annihilation based photon upconversion from the visible to ultraviolet (vis-to-UV). Many photocatalyzed reactions, such as water splitting, require UV photons in order to function efficiently. Upconversion is one possible means of extending the usable range of photons into the visible. Vis-to-UV upconversion is achieved with CdS/ZnS core-shell NCs as the sensitizer and 2,5-diphenyloxazole (PPO) as annihilator and emitter. The ZnS shell was crucial in order to achieve any appreciable upconversion. From time resolved photoluminescence and transient absorption measurements we conclude that the ZnS shell affects the NC and triplet energy transfer (TET) from NC to PPO in two distinct ways. Upon ZnS growth the surface traps are passivated thus increasing the TET. The shell, however, also acts as a tunneling barrier for TET, reducing the efficiency. This leads to an optimal shell thickness where the upconversion quantum yield (Φ'UC) is maximized. Here the maximum Φ'UC was determined to be 5.2 ± 0.5% for 4 monolayers of ZnS shell on CdS NCs.
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Affiliation(s)
- Victor Gray
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , 412 96 Gothenburg , Sweden
| | - Pan Xia
- Materials Science & Engineering Program , University of California, Riverside , 900 University Ave. , Riverside , CA 92521 , USA
| | - Zhiyuan Huang
- Department of Chemistry , University of California, Riverside , 900 University Ave. , Riverside , CA 92521 , USA .
| | - Emily Moses
- Department of Chemistry , University of California, Riverside , 900 University Ave. , Riverside , CA 92521 , USA .
| | - Alexander Fast
- Department of Chemistry , University of California , Irvine , CA 92697 , USA
| | - Dmitry A Fishman
- Department of Chemistry , University of California , Irvine , CA 92697 , USA
| | - Valentine I Vullev
- Department of Chemistry , University of California, Riverside , 900 University Ave. , Riverside , CA 92521 , USA .
| | - Maria Abrahamsson
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , 412 96 Gothenburg , Sweden
| | - Kasper Moth-Poulsen
- Department of Chemistry and Chemical Engineering , Chalmers University of Technology , 412 96 Gothenburg , Sweden
| | - Ming Lee Tang
- Department of Chemistry , University of California, Riverside , 900 University Ave. , Riverside , CA 92521 , USA .
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22
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Li X, Fast A, Huang Z, Fishman DA, Tang ML. Complementary Lock‐and‐Key Ligand Binding of a Triplet Transmitter to a Nanocrystal Photosensitizer. Angew Chem Int Ed Engl 2017; 56:5598-5602. [DOI: 10.1002/anie.201701929] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Indexed: 12/19/2022]
Affiliation(s)
- Xin Li
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | | | - Zhiyuan Huang
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | | | - Ming Lee Tang
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
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23
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Li X, Fast A, Huang Z, Fishman DA, Tang ML. Complementary Lock‐and‐Key Ligand Binding of a Triplet Transmitter to a Nanocrystal Photosensitizer. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201701929] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Xin Li
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | | | - Zhiyuan Huang
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
| | | | - Ming Lee Tang
- Chemistry University of California, Riverside 501 Big Springs Road Riverside CA 92521 USA
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24
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Finkbeiner SD, Fishman DA, Osorio D, Briscoe AD. Ultraviolet and yellow reflectance but not fluorescence is important for visual discrimination of conspecifics by Heliconius erato. ACTA ACUST UNITED AC 2017; 220:1267-1276. [PMID: 28108668 DOI: 10.1242/jeb.153593] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2016] [Accepted: 01/11/2017] [Indexed: 11/20/2022]
Abstract
Toxic Heliconius butterflies have yellow hindwing bars that - unlike those of their closest relatives - reflect ultraviolet (UV) and long wavelength light, and also fluoresce. The pigment in the yellow scales is 3-hydroxy-dl-kynurenine (3-OHK), which is found in the hair and scales of a variety of animals. In other butterflies like pierids with color schemes characterized by independent sources of variation in UV and human-visible yellow/orange, behavioral experiments have generally implicated the UV component as most relevant to mate choice. This has not been addressed in Heliconius butterflies, where variation exists in analogous color components, but moreover where fluorescence due to 3-OHK could also contribute to yellow wing coloration. In addition, the potential cost due to predator visibility is largely unknown for the analogous well-studied pierid butterfly species. In field studies with butterfly paper models, we show that both UV and 3-OHK yellow act as signals for H. erato when compared with models lacking UV or resembling ancestral Eueides yellow, respectively, but attack rates by birds do not differ significantly between the models. Furthermore, measurement of the quantum yield and reflectance spectra of 3-OHK indicates that fluorescence does not contribute to the visual signal under broad-spectrum illumination. Our results suggest that the use of 3-OHK pigmentation instead of ancestral yellow was driven by sexual selection rather than predation.
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Affiliation(s)
- Susan D Finkbeiner
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA .,Smithsonian Tropical Research Institute, Panama City 0843-03092, Panama.,Department of Biological Sciences, Boston University, Boston, MA 02215, USA
| | - Dmitry A Fishman
- Department of Chemistry, University of California, Irvine, CA 92697, USA
| | - Daniel Osorio
- School of Life Sciences, University of Sussex, Brighton BN1 9QG, UK
| | - Adriana D Briscoe
- Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697, USA
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25
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Abstract
Time-resolved ion imaging measurements have been performed to explore the photochemistry of acetaldehyde at photolysis wavelengths spanning the range 265–328 nm.
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Affiliation(s)
| | - Kara M. Kapnas
- Department of Chemistry
- University of California, Irvine
- Irvine
- USA
| | | | - Craig Murray
- Department of Chemistry
- University of California, Irvine
- Irvine
- USA
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26
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Gilliam AJH, Smith JN, Flather D, Johnston KM, Gansmiller AM, Fishman DA, Edgar JM, Balk M, Majumdar S, Weiss GA. Affinity-Guided Design of Caveolin-1 Ligands for Deoligomerization. J Med Chem 2016; 59:4019-25. [PMID: 27010220 DOI: 10.1021/acs.jmedchem.5b01536] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Caveolin-1 is a target for academic and pharmaceutical research due to its many cellular roles and associated diseases. We report peptide WL47 (1), a small, high-affinity, selective disrupter of caveolin-1 oligomers. Developed and optimized through screening and analysis of synthetic peptide libraries, ligand 1 has 7500-fold improved affinity compared to its T20 parent ligand and an 80% decrease in sequence length. Ligand 1 will permit targeted study of caveolin-1 function.
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Affiliation(s)
- Amanda J H Gilliam
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Joshua N Smith
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Dylan Flather
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Kevin M Johnston
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Andrew M Gansmiller
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Dmitry A Fishman
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Joshua M Edgar
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Mark Balk
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Sudipta Majumdar
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
| | - Gregory A Weiss
- Department of Chemistry, and ‡Department of Molecular Biology and Biochemistry, University of California , Irvine, California 92697-2025, United States
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27
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Jahng J, Fishman DA, Park S, Nowak DB, Morrison WA, Wickramasinghe HK, Potma EO. Linear and Nonlinear Optical Spectroscopy at the Nanoscale with Photoinduced Force Microscopy. Acc Chem Res 2015; 48:2671-9. [PMID: 26449563 DOI: 10.1021/acs.accounts.5b00327] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
The enormous advances made in nanotechnology have also intensified the need for tools that can characterize newly synthesized nanoaterials with high sensitivity and with high spatial resolution. Many existing tools with nanoscopic resolution or better, including scanning electron microscopy (SEM), atomic force microscopy (AFM), and scanning tunneling microscopy (STM) methods, can generate highly detailed maps of nanoscopic structures. However, while these approaches provide great views of the morphological properties of nanomaterials, it has proven more challenging to derive chemical information from the corresponding images. To address this issue, attempts have been made to dress existing nanoscopy methods with spectroscopic sensitivity. A powerful approach in this direction is the combination of scan probe techniques with optical illumination, which aims to marry the nanoscopic resolution provided by a sharp tip with the chemical selectivity provided by optical spectroscopy. Examples of this approach include existing techniques such as scattering-type scanning near-field optical microscopy and tip-enhanced Raman spectroscopy. A new and emerging technique in this direction is photoinduced force microscopy (PiFM), which enables spectroscopic probing of materials with a spatial resolution well under 10 nm. In PiFM, the sample is optically excited and the response of the material is probed directly in the near-field by reading out the time-integrated force between the tip and the sample. Because the magnitude of the force is dependent on the photoinduced polarization in the sample, PiFM exhibits spectroscopic sensitivity. The photoinduced forces measured in PiFM are spatially confined on the nanometer scale, which translates into a very high spatial resolution even under ambient conditions. The PiFM approach is compatible with a wide range optical excitation frequencies, from the visible to the mid-infrared, enabling nanoscale imaging contrast based on either electronic or vibrational transitions in the sample. These properties make PiFM an attractive method for the visualization and spectroscopic characterization of a vast variety of nano materials, from semiconducting nanoparticles to polymer thin films to sensitive measurements of single molecules. In this Account, we review the principles of the PiFM technique and discuss the basic components of the photoinduced force microscope. We highlight the imaging properties of the PiFM instrument and demonstrate the inherent spectroscopic sensitivity of the technique. Furthermore, we show that the PiFM approach can be used to probe both the linear and nonlinear optical properties of nano materials. In addition, we provide several examples of PiFM imaging applications.
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Affiliation(s)
| | | | - Sung Park
- Molecular Vista Inc., 6840 Via
Del Oro, San Jose, California 95119, United States
| | - Derek B. Nowak
- Molecular Vista Inc., 6840 Via
Del Oro, San Jose, California 95119, United States
| | - Will A. Morrison
- Molecular Vista Inc., 6840 Via
Del Oro, San Jose, California 95119, United States
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El Khouly NI, Barr RL, Kim BB, Jeng CJ, Nagarsheth NP, Fishman DA, Nezhat FR, Gretz HF, Chuang LT. Comparison of robotic-assisted and conventional laparoscopy in the management of adnexal masses. J Minim Invasive Gynecol 2014; 21:1071-4. [PMID: 24865631 DOI: 10.1016/j.jmig.2014.05.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 05/18/2014] [Accepted: 05/21/2014] [Indexed: 11/26/2022]
Abstract
STUDY OBJECTIVE To compare the outcome of robotic-assisted laparoscopy vs conventional laparoscopy in the management of ovarian masses. DESIGN Retrospective cohort (Canadian Task Force classification II-3). SETTING Academic medical centre in the northeast United States. PATIENTS Retrospective medical record review of 71 consecutive patients with presumed benign ovarian masses. INTERVENTION Robotic-assisted laparoscopy in 30 patients with presumed benign ovarian masses was compared with conventional laparoscopy in 41 patients. MEASUREMENTS AND MAIN RESULTS Operative outcomes including operative time, estimated blood loss, length of hospital stay, and complications were recorded. Standard statistical analysis was used to compare the outcomes in the 2 groups. Mean (SD) operative time in the robotic group was 1.95 (0.63) hours, which was significantly longer than in the conventional laparoscopic group, 1.28 (0.83) hours (p = .04). Estimated blood loss in the robotic group was 74.52 (56.23) mL, which was not significantly different from that in the conventional laparoscopic group, 55.97 (49.18) mL. There were no significant differences in length of hospital stay between the robotic and conventional laparoscopic groups: 1.20 (0.78) days and 1.48 (0.63). Conversion to laparotomy was not necessary in either group of patients. Intraoperative and postoperative complications were similar between the 2 groups. CONCLUSION Robotic-assisted laparoscopy is a safe and efficient technique for management of various types of ovarian masses. However, conventional laparoscopy is preferred for management of ovarian masses because of shorter operative time. Prospective studies are needed to evaluate the outcomes of robotic-assisted laparoscopic management of benign and malignant ovarian neoplasms.
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Affiliation(s)
- N I El Khouly
- Department of Obstetrics and Gynecology, Menoufia University, Menufia, Egypt
| | - R L Barr
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York
| | - B B Kim
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York
| | - C J Jeng
- Department of Obstetrics and Gynecology, Kaohsiung Medical University Hospital, Department of Obstetrics and Gynecology, School of Medicine, College of Medicine, Kachsiung Medical University, Kaohsiung, Taiwan
| | - N P Nagarsheth
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York
| | - D A Fishman
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York
| | - F R Nezhat
- Department of Obstetrics and Gynecology, St. Luke's-Roosevelt Hospital, New York, New York
| | - H F Gretz
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York
| | - L T Chuang
- Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, New York, New York.
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Montagnese M, Otter M, Zotos X, Fishman DA, Hlubek N, Mityashkin O, Hess C, Saint-Martin R, Singh S, Revcolevschi A, van Loosdrecht PHM. Phonon-magnon interaction in low dimensional quantum magnets observed by dynamic heat transport measurements. Phys Rev Lett 2013; 110:147206. [PMID: 25167033 DOI: 10.1103/physrevlett.110.147206] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Indexed: 06/03/2023]
Abstract
Thirty-five years ago, Sanders and Walton [Phys. Rev. B 15, 1489 (1977)] proposed a method to measure the phonon-magnon interaction in antiferromagnets through thermal transport which so far has not been verified experimentally. We show that a dynamical variant of this approach allows direct extraction of the phonon-magnon equilibration time, yielding 400 μs for the cuprate spin-ladder system Ca(9)La(5)Cu(24)O(41). The present work provides a general method to directly address the spin-phonon interaction by means of dynamical transport experiments.
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Affiliation(s)
- Matteo Montagnese
- Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, The Netherlands
| | - Marian Otter
- Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, The Netherlands
| | - Xenophon Zotos
- Department of Physics, University of Crete and Foundation for Research and Technology-Hellas, 71003 Heraklion, Greece
| | - Dmitry A Fishman
- Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, The Netherlands
| | - Nikolai Hlubek
- IFW-Dresden, Institute for Solid State Research, P.O. Box 270116, D-01171 Dresden, Germany
| | - Oleg Mityashkin
- IFW-Dresden, Institute for Solid State Research, P.O. Box 270116, D-01171 Dresden, Germany
| | - Christian Hess
- IFW-Dresden, Institute for Solid State Research, P.O. Box 270116, D-01171 Dresden, Germany
| | - Romuald Saint-Martin
- Laboratoire de Physico-Chimie de L'Etat Solide, ICMMO, UMR8182, Université Paris-Sud, 91405 Orsay CEDEX, France
| | - Surjeet Singh
- Laboratoire de Physico-Chimie de L'Etat Solide, ICMMO, UMR8182, Université Paris-Sud, 91405 Orsay CEDEX, France
| | - Alexandre Revcolevschi
- Laboratoire de Physico-Chimie de L'Etat Solide, ICMMO, UMR8182, Université Paris-Sud, 91405 Orsay CEDEX, France
| | - Paul H M van Loosdrecht
- Zernike Institute for Advanced Materials, Rijksuniversiteit Groningen, Nijenborgh 4, 9747 AG, The Netherlands
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Peceli D, Hu H, Fishman DA, Webster S, Przhonska OV, Kurdyukov VV, Slominsky YL, Tolmachev AI, Kachkovski AD, Gerasov AO, Masunov AE, Hagan DJ, Van Stryland EW. Enhanced intersystem crossing rate in polymethine-like molecules: sulfur-containing squaraines versus oxygen-containing analogues. J Phys Chem A 2013; 117:2333-46. [PMID: 23427868 DOI: 10.1021/jp400276g] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Two different approaches to increase intersystem crossing rates in polymethine-like molecules are presented: traditional heavy-atom substitution and molecular levels engineering. Linear and nonlinear optical properties of a series of polymethine dyes with Br- and Se-atom substitution, and a series of new squaraine molecules, where one or two oxygen atoms in a squaraine bridge are replaced with sulfur atoms, are investigated. A consequence of the oxygen-to-sulfur substitution in squaraines is the inversion of their lowest-lying ππ* and nπ* states leading to a significant reduction of singlet-triplet energy difference and opening of an additional intersystem channel of relaxation. Experimental studies show that triplet quantum yields for polymethine dyes with heavy-atom substitutions are small (not more than 10%), while for sulfur-containing squaraines these values reach almost unity. Linear spectroscopic characterization includes absorption, fluorescence, quantum yield, anisotropy, and singlet oxygen generation measurements. Nonlinear characterization, performed by picosecond and femtosecond laser systems (pump-probe and Z-scan measurements), includes measurements of the triplet quantum yields, excited state absorption, two-photon absorption, and singlet and triplet state lifetimes. Experimental results are in agreement with density functional theory calculations allowing determination of the energy positions, spin-orbital coupling, and electronic configurations of the lowest electronic transitions.
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Affiliation(s)
- Davorin Peceli
- CREOL: College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
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Peceli D, Webster S, Fishman DA, Cirloganu CM, Hu H, Przhonska OV, Kurdyukov VV, Slominsky YL, Tolmachev AI, Kachkovski AD, Dasari RR, Barlow S, Marder SR, Hagan DJ, Van Stryland EW. Optimization of the Double Pump–Probe Technique: Decoupling the Triplet Yield and Cross Section. J Phys Chem A 2012; 116:4833-41. [DOI: 10.1021/jp301051u] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | | | | | | | | | - Olga V. Przhonska
- Institute of Physics, National Academy of Sciences, Kiev 03028,
Ukraine
| | | | - Yurii L. Slominsky
- Institute
of Organic
Chemistry, National Academy of Sciences, Kiev 03094, Ukraine
| | - Alexey I. Tolmachev
- Institute
of Organic
Chemistry, National Academy of Sciences, Kiev 03094, Ukraine
| | - Alexey D. Kachkovski
- Institute
of Organic
Chemistry, National Academy of Sciences, Kiev 03094, Ukraine
| | - Raghunath R. Dasari
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332,
United States
| | - Stephen Barlow
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332,
United States
| | - Seth R. Marder
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332,
United States
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Hu H, Fishman DA, Gerasov AO, Przhonska OV, Webster S, Padilha LA, Peceli D, Shandura M, Kovtun YP, Kachkovski AD, Nayyar IH, Masunov AE, Tongwa P, Timofeeva TV, Hagan DJ, Van Stryland EW. Two-Photon Absorption Spectrum of a Single Crystal Cyanine-like Dye. J Phys Chem Lett 2012; 3:1222-8. [PMID: 26288058 DOI: 10.1021/jz300222h] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The two-photon absorption (2PA) spectrum of an organic single crystal is reported. The crystal is grown by self-nucleation of a subsaturated hot solution of acetonitrile, and is composed of an asymmetrical donor-π-acceptor cyanine-like dye molecule. To our knowledge, this is the first report of the 2PA spectrum of single crystals made from a cyanine-like dye. The linear and nonlinear properties of the single crystalline material are investigated and compared with the molecular properties of a toluene solution of its monomeric form. The maximum polarization-dependent 2PA coefficient of the single crystal is 52 ± 9 cm/GW, which is more than twice as large as that for the inorganic semiconductor CdTe with a similar absorption edge. The optical properties, linear and nonlinear, are strongly dependent upon incident polarization due to anisotropic molecular packing. X-ray diffraction analysis shows π-stacking dimers formation in the crystal, similar to H-aggregates. Quantum chemical calculations demonstrate that this dimerization leads to the splitting of the energy bands and the appearance of new red-shifted 2PA bands when compared to the solution of monomers. This trend is opposite to the blue shift in the linear absorption spectra upon H-aggregation.
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Affiliation(s)
- Honghua Hu
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
| | - Dmitry A Fishman
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
| | - Andrey O Gerasov
- ‡Institute of Organic Chemistry, National Academy of Sciences, Murmanskaya 5, Kiev, 03094, Ukraine
| | - Olga V Przhonska
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- §Institute of Physics, National Academy of Sciences, Prospect Nauki 46, Kiev, 03028, Ukraine
| | - Scott Webster
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
| | - Lazaro A Padilha
- ∥Center for Advanced Solar Photophysics, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Davorin Peceli
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
| | - Mykola Shandura
- ‡Institute of Organic Chemistry, National Academy of Sciences, Murmanskaya 5, Kiev, 03094, Ukraine
| | - Yuriy P Kovtun
- ‡Institute of Organic Chemistry, National Academy of Sciences, Murmanskaya 5, Kiev, 03094, Ukraine
| | - Alexey D Kachkovski
- ‡Institute of Organic Chemistry, National Academy of Sciences, Murmanskaya 5, Kiev, 03094, Ukraine
| | - Iffat H Nayyar
- ⊥NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
- #Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
- ▽Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- ○Florida Solar Energy Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Artëm E Masunov
- ⊥NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, United States
- #Department of Chemistry, University of Central Florida, Orlando, Florida 32816, United States
- ▽Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
- ○Florida Solar Energy Center, University of Central Florida, Orlando, Florida 32816, United States
| | - Paul Tongwa
- ◆Department of Biology and Chemistry, New Mexico Highlands University, Las Vegas, New Mexico 87701, United States
| | - Tatiana V Timofeeva
- ◆Department of Biology and Chemistry, New Mexico Highlands University, Las Vegas, New Mexico 87701, United States
| | - David J Hagan
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- ▽Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
| | - Eric W Van Stryland
- †CREOL, The College of Optics and Photonics, University of Central Florida, Orlando, Florida 32816, United States
- ▽Department of Physics, University of Central Florida, Orlando, Florida 32816, United States
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Cirloganu CM, Padilha LA, Fishman DA, Webster S, Hagan DJ, Van Stryland EW. Extremely nondegenerate two-photon absorption in direct-gap semiconductors [Invited]. Opt Express 2011; 19:22951-22960. [PMID: 22109174 DOI: 10.1364/oe.19.022951] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Two-photon absorption (2PA) spectra with pairs of extremely nondegenerate photons are measured in several direct-gap semiconductors (GaAs, CdTe, ZnO, ZnS and ZnSe) using picosecond or femtosecond pulses. In ZnSe, using photons with a ratio of energies of ~12, we obtain a 270-fold enhancement of 2PA when comparing to the corresponding degenerate 2PA coefficient at the average photon energy (ηω1 + ηω2)/2. This corresponds to a pump photon energy of 8% of the bandgap. 2PA coefficients as large as 1 cm/MW are measured. Thus, by using two widely different wavelengths we are able to access the large 2PA observed previously only in narrow gap semiconductors. We also calculate the corresponding enhancement of nonlinear refraction, consisting of two-photon, AC-Stark and Raman contributions. The net effect is a smaller enhancement, but exhibits very large dispersion within the 2PA regime.
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Affiliation(s)
- Claudiu M Cirloganu
- CREOL: The College of Optics and Photonics, University of Central Florida, 4000 Central Florida Blvd, Orlando, FL 32816, USA
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Ensley TR, Fishman DA, Webster S, Padilha LA, Hagan DJ, Van Stryland EW. Energy and spectral enhancement of femtosecond supercontinuum in a noble gas using a weak seed. Opt Express 2011; 19:757-763. [PMID: 21263616 DOI: 10.1364/oe.19.000757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We experimentally demonstrate that the use of a weak seed pulse of energy less than 0.4% of the pump results in a spectral energy enhancement that spans over 2 octaves and a total energy enhancement of more than 3 times for supercontinua generated by millijoule level femtosecond pulses in Krypton gas. Strong four-wave mixing of the pump-seed pulse interacting in the gas is observed. The spectral irradiance generated from the seeding process is sufficiently high to use white-light continuum as an alternative to conventional tunable sources of radiation for applications such as nonlinear optical spectroscopy.
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Affiliation(s)
- Trenton R Ensley
- College of Optics & Photonics: CREOL & FPCE, University of Central Florida, Orlando, Florida 32816-2700, USA
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35
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Conrads TP, Fusaro VA, Ross S, Johann D, Rajapakse V, Hitt BA, Steinberg SM, Kohn EC, Fishman DA, Whitely G, Barrett JC, Liotta LA, Petricoin EF, Veenstra TD. High-resolution serum proteomic features for ovarian cancer detection. Endocr Relat Cancer 2004; 11:163-78. [PMID: 15163296 DOI: 10.1677/erc.0.0110163] [Citation(s) in RCA: 186] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Serum proteomic pattern diagnostics is an emerging paradigm employing low-resolution mass spectrometry (MS) to generate a set of biomarker classifiers. In the present study, we utilized a well-controlled ovarian cancer serum study set to compare the sensitivity and specificity of serum proteomic diagnostic patterns acquired using a high-resolution versus a low-resolution MS platform. In blinded testing sets, the high-resolution mass spectral data contained multiple diagnostic signatures that were superior to the low-resolution spectra in terms of sensitivity and specificity (P<0.00001) throughout the range of modeling conditions. Four mass spectral feature set patterns acquired from data obtained exclusively with the high-resolution mass spectrometer were 100% specific and sensitive in their diagnosis of serum samples as being acquired from either unaffected patients or those suffering from ovarian cancer. Important to the future of proteomic pattern diagnostics is the ability to recognize inferior spectra statistically, so that those resulting from a specific process error are recognized prior to their potentially incorrect (and damaging) diagnosis. To meet this need, we have developed a series of quality-assurance and in-process control procedures to (a) globally evaluate sources of sample variability, (b) identify outlying mass spectra, and (c) develop quality-control release specifications. From these quality-assurance and control (QA/QC) specifications, we identified 32 mass spectra out of the total 248 that showed statistically significant differences from the norm. Hence, 216 of the initial 248 high-resolution mass spectra were determined to be of high quality and were remodeled by pattern-recognition analysis. Again, we obtained four mass spectral feature set patterns that also exhibited 100% sensitivity and specificity in blinded validation tests (68/68 cancer: including 18/18 stage I, and 43/43 healthy). We conclude that (a) the use of high-resolution MS yields superior classification patterns as compared with those obtained with lower resolution instrumentation; (b) although the process error that we discovered did not have a deleterious impact on the present results obtained from proteomic pattern analysis, the major source of spectral variability emanated from mass spectral acquisition, and not bias at the clinical collection site; (c) this variability can be reduced and monitored through the use of QA/QC statistical procedures; (d) multiple and distinct proteomic patterns, comprising low molecular weight biomarkers, detected by high-resolution MS achieve accuracies surpassing individual biomarkers, warranting validation in a large clinical study.
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Affiliation(s)
- T P Conrads
- National Cancer Institute Biomedical Proteomics Program, Laboratory of Proteomics and Analytical Technologies, SAIC-Frederick, Inc., National Cancer Institute at Frederick, Frederick, MD 21702, USA
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Calhoun EA, Welshman EE, Chang CH, Lurain JR, Fishman DA, Hunt TL, Cella D. Psychometric evaluation of the Functional Assessment of Cancer Therapy/Gynecologic Oncology Group-Neurotoxicity (Fact/GOG-Ntx) questionnaire for patients receiving systemic chemotherapy. Int J Gynecol Cancer 2004; 13:741-8. [PMID: 14675309 DOI: 10.1111/j.1525-1438.2003.13603.x] [Citation(s) in RCA: 199] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
The purpose of this study was to validate the Functional Assessment of Cancer Therapy/Gynecologic Oncology Group-Neurotoxicity (FACT/GOG-Ntx) questionnaire. The FACT/GOG-Ntx is the FACT-G plus an eleven-item subscale (Ntx subscale) that evaluates symptoms and concerns associated specifically with chemotherapy-induced neuropathy. Two groups of women with ovarian cancer completed the FACT/GOG-Ntx: one group with known neurotoxicities and one group of chemotherapy-naive women newly diagnosed with ovarian cancer. Levels of patient neuropathy, severity of toxicity, and patient quality of life from diagnosis of ovarian cancer to 12 months post-diagnosis were assessed. The Ntx subscale significantly differentiated the two groups at baseline and 3- and 6-month follow-ups, demonstrating significantly fewer problems among chemotherapy-naive patients than among patients with known neuropathy. The FACT/GOG-Ntx is a reliable and valid instrument for assessing the impact of neuropathy on health-related quality of life. The Ntx subscale demonstrated sensitivity to meaningful clinical distinctions and change over time.
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Affiliation(s)
- E A Calhoun
- Departments of Urology, Institute for Health Services and Health Policy Studies, Northwestern University Medical School, Chicago, Illinois 60611, USA.
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Hendrickson BC, Nielsen DR, Gaglio CA, Wonderlick A, Fishman DA, Frank TS, Scholl T. Interpreting three new and unique BRCA1 mutations in an Ashkenazi Jewish patient. Clin Genet 2002; 61:317-8. [PMID: 12030901 DOI: 10.1034/j.1399-0004.2002.610415.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Calhoun EA, Chang CH, Welshman EE, Fishman DA, Lurain JR, Bennett CL. Evaluating the total costs of chemotherapy-induced toxicity: results from a pilot study with ovarian cancer patients. Oncologist 2002; 6:441-5. [PMID: 11675522 DOI: 10.1634/theoncologist.6-5-441] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
PURPOSE While chemotherapy-related toxicities affect cancer patients' activities of daily living and result in large expenditures of medical care for treatment, few studies have assessed the out-of-pocket and indirect costs incurred by patients who experience toxicity. The objective of this study was to evaluate the feasibility of obtaining detailed and comprehensive cost information from patients who experienced neutropenia, thrombocytopenia, or neurotoxicity during treatment. METHODS Ovarian cancer patients who experienced chemotherapy-associated hematologic or neurologic toxicities were asked to record detailed information about hospitalization, laboratories, physician visits, phone calls, home visits, medication, medical devices, lost productivity, and caregivers. Resource estimates were converted into cost units, with direct medical cost estimates based on hospital cost-accounting data and indirect costs (i.e., productivity loss) on modified labor force, employment, and earnings data. RESULTS Direct medical costs were highest for neutropenia (mean of $7,546/episode), intermediate for thrombocytopenia (mean of $3,268/episode), and lowest for neurotoxicity (mean of $688/episode). Indirect costs relating to patient and caregiver work loss and payments for caregiver support were substantial, accounting for $4,220, $3,834, and $4,282 for patients who developed neurotoxicity, neutropenia, and thrombocytopenia, respectively. The total costs of chemotherapy-related neurotoxicity, neutropenia, and thrombocytopenia were $4,908, $11,830, and $7,550. CONCLUSION Our study has shown that, with the assistance of patients who are experiencing toxicity, estimation of the total costs of cancer-related toxicities is feasible. Indirect costs, while not included in prior estimates of the costs of toxicity studies, accounted for 34% to 86% of the total costs of cancer supportive care.
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Affiliation(s)
- E A Calhoun
- The Institute for Health Services Research and Policy Studies, Department of Obstetrics and Gynecology, the Robert H. Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, Illinois 60611, USA.
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Cohen LS, Escobar PF, Scharm C, Glimco B, Fishman DA. Three-dimensional power Doppler ultrasound improves the diagnostic accuracy for ovarian cancer prediction. Gynecol Oncol 2001; 82:40-8. [PMID: 11426960 DOI: 10.1006/gyno.2001.6253] [Citation(s) in RCA: 162] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE The goal of this study was to determine if three-dimensional power Doppler ultrasound improves the specificity for ovarian cancer detection as compared with two-dimensional ultrasound. METHODS Seventy-one women with a known complex pelvic mass were referred for a preoperative ultrasound evaluation with both two-dimensional and three-dimensional gray-scale ultrasonography. The 3D studies were performed with the Kretz Voluson 530D using a mechanized transvaginal probe. Surface rendering and power Doppler imaging were performed by the same gynecologic sonologist, and reassigned to one of four echo patterns: cystic, multicystic, complex, or solid. Sonographic criteria used for diagnosing ovarian cancer were based on a system that included morphological characteristics, histological prediction, and power Doppler imaging. RESULTS Seventy-one women underwent surgical exploration: 14 (19.7%) had ovarian cancer (2 FIGO stage I, 2 stage II, 7 stage III, and 3 metastatic colon) and 2 had uterine cancer. Two-dimensional gray-scale ultrasound identified 40 masses as suspicious for cancer, including all 14 malignancies, yielding a sensitivity, specificity, and positive predictive value of 100, 54, and 35%, respectively. However, evaluation with 3D power Doppler identified only 28 cases as suspicious (including all 14 cancers), resulting in a sensitivity, specificity, and positive predictive value of 100, 75, and 50%, respectively. CONCLUSIONS Three-dimensional power Doppler imaging better defines the morphological and vascular characteristics of ovarian lesions. All malignancies were correctly identified by both 2D and 3D imaging; however, the specificity significantly improved with the addition of 3D power Doppler. This improved diagnostic accuracy may promote improved patient care by separating complex benign masses from ovarian cancer, therefore facilitating appropriate physician referral.
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Affiliation(s)
- L S Cohen
- Section of Obstetric and Gynecologic Ultrasound, Northwestern University Medical School, Chicago, Illinois, 60611, USA
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Fishman DA, Liu Y, Ellerbroek SM, Stack MS. Lysophosphatidic acid promotes matrix metalloproteinase (MMP) activation and MMP-dependent invasion in ovarian cancer cells. Cancer Res 2001; 61:3194-9. [PMID: 11306508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
Abstract
Ovarian cancer is an highly metastatic disease characterized by ascites formation and diffuse i.p. adhesion, invasion, and metastasis. Levels of lysophosphatidic acid (LPA) are elevated in the plasma of patients with ovarian carcinoma, including 90% of patients with stage I disease, suggesting that LPA may promote early events in ovarian carcinoma dissemination. Expression of matrix metalloproteinases (MMPs) is also up-regulated in ovarian cancer tissues and ascites, and numerous studies have provided evidence for a direct role of MMPs in i.p. invasion and metastasis. Using three-dimensional type I collagen cultures or immobilized beta1 integrin subunit-specific antibodies, we previously demonstrated that beta1 integrin clustering promotes activation of proMMP-2 and processing of membrane type 1 MMP in ovarian cancer cells (S. M. Ellerbroek et al., Cancer Res., 59: 1635-1641, 1999). In the current study, the effect of LPA on MMP expression and invasive activity was investigated. Treatment of ovarian cancer cells with pathophysiological levels of LPA increased cellular adhesion to type I collagen and beta1 integrin expression. A significant up-regulation of MMP-dependent proMMP-2 activation was observed in LPA-treated cells, leading to enhanced pericellular MMP activity. As a result of increased MMP activity, haptotactic and chemotactic motility, in vitro wound closure, and invasion of a synthetic basement membrane were enhanced. These data indicate that LPA contributes to metastatic dissemination of ovarian cancer cells via up-regulation of MMP activity and subsequent downstream changes in MMP-dependent migratory and invasive behavior.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, and R H Lurie Comprehensive Cancer Center, Northwestern University Medical School, Chicago, Illinois 60611, USA
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Fishman DA, Kearns A, Chilukuri K, Bafetti LM, O'Toole EA, Georgacopoulos J, Ravosa MJ, Stack MS. Metastatic dissemination of human ovarian epithelial carcinoma is promoted by alpha2beta1-integrin-mediated interaction with type I collagen. Invasion Metastasis 2000; 18:15-26. [PMID: 10207247 DOI: 10.1159/000024495] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Metastatic dissemination of epithelial ovarian carcinoma is thought to be mediated via tumor cell exfoliation into the peritoneal cavity, followed by adhesion to and invasion through the mesothelium which overlies the contents of the peritoneal cavity. In this study, we have utilized short-term primary cultures to analyze the effect of specific extracellular matrix proteins on properties of human ovarian epithelial carcinoma cells which contribute to the invasive phenotype. Analysis of cell:matrix adhesive profiles indicated that ovarian carcinoma cells adhere preferentially to type I collagen. Immunoprecipitation analyses demonstrated the presence of the collagen-binding alpha2beta1 integrin in biotin-labeled ovarian carcinoma cell membranes, and cellular adhesion was inhibited by blocking antibodies directed against the alpha2 and beta1 integrin subunits. The alpha2beta1-binding peptide Asp-Gly-Glu-Ala (DGEA) was also moderately effective at blocking adhesion to collagen relative to the control peptide Ala-Gly-Glu-Ala (AGEA). Analysis of cell motility on protein-coated colloidal gold coverslips demonstrated that ovarian carcinoma cells migrate preferentially on type I collagen coated surfaces. Type I collagen promoted migration in a concentration-dependent, saturable manner, with maximal migration observed at a collagen-coating concentration of 50 microg/ml. Migration on collagen was inhibited by antibodies directed against the alpha2 and beta1 integrin subunits and by DGEA peptide, providing evidence for the role of the alpha2beta1 integrin in ovarian carcinoma cell motility. Culturing ovarian carcinoma cells on type I collagen gels led to a significant increase in conversion of the matrix metalloproteinase 2 zymogen to the 66-kD form, suggesting that adhesion to collagen also influences matrix-degrading proteinases. These data suggest that alpha2beta1-integrin-mediated interaction of ovarian carcinoma cells with type I collagen, a protein prevalent both in the mesothelial extracellular matrix and in the peritoneal cavity of ovarian carcinoma patients, may function on multiple levels to promote metastatic dissemination of ovarian carcinoma cells.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Ill. 60611, USA
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Fishman DA, Cohen LS. Is transvaginal ultrasound effective for screening asymptomatic women for the detection of early-stage epithelial ovarian carcinoma? Gynecol Oncol 2000; 77:347-9. [PMID: 10831340 DOI: 10.1006/gyno.2000.5850] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Fishman DA, Bafetti LM, Stack MS. Membrane-type matrix metalloproteinase expression and matrix metalloproteinase-2 activation in primary human ovarian epithelial carcinoma cells. Invasion Metastasis 2000; 16:150-9. [PMID: 9186550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Metastatic dissemination of epithelial ovarian carcinoma occurs primarily through exfoliation of cells from the primary tumor, with subsequent implantation, invasion, and growth throughout the organs within the peritoneal cavity. Previous studies have suggested a role for matrix metalloproteinases (MMPs), particularly MMP-2, in ovarian cancer invasion and metastasis. To characterize further the role of MMPs and their inhibitors in ovarian carcinoma, in this study the production and activation of MMPs by short-term primary cultures of human ovarian epithelial carcinoma cells were analyzed. We report that MMP-2 is the predominant gelatinolytic MMP secreted by primary ovarian cancer cells derived from both ovarian tumors and ascites fluid. Furthermore, zymographic analysis demonstrated that MMP-2 is present in conditioned media in both the latent and activated forms, indicating that primary ovarian cancer cells catalyze proMMP-2 activation. Presence of a proMMP-2 activator was confirmed by immunohistochemistry and immunoprecipitation studies which found membrane-type 1 MMP (MT1-MMP) in the membranes of unstimulated cells and levels of both MT1-MMP and tissue inhibitor of metalloproteinases-2 (TIMP-2) were enhanced by culturing cells in the presence of concanavalin A. In addition, interaction of MMP-2 with the ovarian carcinoma cell surface resulted in a 2.5- to 5-fold increase in invasiveness. These data suggest that MT1-MMP-catalyzed activation of proMMP-2 may play a physiologic role in intraperitoneal invasion of ovarian carcinoma cells.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, IL 60611, USA
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Fishman DA, Kearns A, Larsh S, Enghild JJ, Stack MS. Autocrine regulation of growth stimulation in human epithelial ovarian carcinoma by serine-proteinase-catalysed release of the urinary-type-plasminogen-activator N-terminal fragment. Biochem J 1999; 341 ( Pt 3):765-9. [PMID: 10417342 PMCID: PMC1220416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
Ovarian carcinomas secrete single-chain urinary-type plasminogen activator (scuPA) and expression of uPA is up-regulated relative to normal ovarian epithelium, leading to an enhanced proteolytic capacity which may facilitate invasion. Furthermore, the uPA receptor (uPAR) is present on ovarian carcinoma cells and is occupied in tumour tissues. In the present study, incubation of scuPA with serum-free conditioned medium from ovarian carcinoma cells resulted in release of a 14 kDa polypeptide. N-terminal sequence analysis identified this fragment as the uPA N-terminal fragment (NTF), which contains a growth-factor and a kringle domain. NTF generation was abolished by serine-proteinase inhibitors, but not inhibitors of matrix metalloproteinases, and was not enhanced by the addition of plasminogen or plasmin. To determine whether ovarian carcinoma-cell growth is altered by uPA, the effect of exogenous scuPA or NTF on proliferation was analysed. Both NTF and scuPA induced a dose-dependent increase in proliferation, with maximal stimulation obtained at 10-20 nM. Furthermore, blocking the interaction of endogenous uPA with uPAR using anti-NTF antibodies significantly inhibited proliferation. Together these data indicate that, in addition to enhancing the invasive activity of ovarian carcinoma cells via increased pericellular proteolysis, uPA also acts as a mitogen for ovarian carcinoma cells, suggesting a biochemical mechanism whereby uPA may contribute to ovarian carcinoma progression by modulating both cell invasion and proliferation.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, IL 60611, USA
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Ellerbroek SM, Fishman DA, Kearns AS, Bafetti LM, Stack MS. Ovarian carcinoma regulation of matrix metalloproteinase-2 and membrane type 1 matrix metalloproteinase through beta1 integrin. Cancer Res 1999; 59:1635-41. [PMID: 10197640] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
Culturing DOV 13 ovarian carcinoma cells on three-dimensional collagen lattice but not on thin-layer collagen induces processing of promatrix metalloproteinase (MMP)-2 to a M(r) 62,000 form, suggesting that multivalent integrin aggregation may participate in proteinase regulation. To address the role of collagen-binding integrins in this event, we treated DOV 13 cells with soluble beta1 integrin antibodies (clones P4C10 or 21C8) or beta1 integrin antibodies immobilized on latex beads to promote integrin aggregation. Divalent ligation of beta1 integrins with soluble P4C10 antibodies stimulated expression of pro-MMP-2 and its inhibitor, tissue inhibitor of metalloproteinase-2, whereas soluble 21C8 antibodies had no effect. Aggregation of beta1 integrins with immobilized 21C8 or P4C10 antibodies stimulated MMP-dependent pro-MMP-2 activation and accumulation of a M(r) 43,000 form of membrane type 1 MMP (MT1-MMP), a cell surface activator of pro-MMP-2, in cell extracts. beta1 integrin-mediated MMP-2 activation required protein synthesis and tyrosine kinase signaling and was reduced by an inhibitor of gene transcription. Treatment of control cells with concanavalin A stimulated MMP-dependent pro-MMP-2 activation and accumulation of M(r) 55,000 and 43,000 forms of MT1-MMP in cell extracts. Addition of either the MMP inhibitor GM-6001-X or exogenous tissue inhibitor of metalloproteinase-2 to concanavalin A-treated cells resulted in loss of the M(r) 43,000 form of MT1-MMP and accumulation of the M(r) 55,000 form of the enzyme in cell extracts, suggesting that the M(r) 43,000 form is a product of MMP-dependent M(r) 55,000 MT1-MMP proteolysis. Together, these data suggest that beta1 integrin stimulation of pro-MMP-2 activation involves MT1-MMP posttranslational processing and requires multivalent integrin aggregation.
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Affiliation(s)
- S M Ellerbroek
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois 60611, USA
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Calhoun EA, Bennett CL, Peeples PA, Lurain JR, Roland PY, Weinstein JM, Fishman DA. Perceptions of cisplatin-related toxicity among ovarian cancer patients and gynecologic oncologists. Gynecol Oncol 1998; 71:369-75. [PMID: 9887233 DOI: 10.1006/gyno.1998.5189] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND We conducted a pilot study to evaluate issues related to chemotherapy-induced toxicities by eliciting assessments of toxicity from women with advanced stage ovarian cancer and gynecologic oncologists. PATIENTS AND METHODS Fifteen ovarian cancer patients and ten gynecologic oncologists completed the survey exercises. All patients surveyed had received at least six courses of a cisplatin-containing chemotherapy regimen. RESULTS For both patients and physicians, there was good face validity to the utility exercise as assessments of health states with cisplatin were (1) consistently associated with less favorable assessments than the health state with no toxicity and (2) neurotoxicity was viewed less favorably than either ototoxicity or nephrotoxicity. While the 15 patients as a group viewed health states with toxicity more favorably than physicians (P < 0.05 for each toxicity), patient assessments varied, depending on individual experiences with cisplatin. Physician assessments of toxicity were most similar to those obtained from patients who had not experienced cisplatin toxicity and were less favorable than those elicited from patients who had experienced any toxicity. CONCLUSIONS In deciding upon therapeutic strategies, women with advanced stage ovarian cancer and treating physicians markedly differ in their assessment of the impact of specific toxicities on quality of life.
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Affiliation(s)
- E A Calhoun
- Department of Medicine, Northwestern University Medical School, Chicago, Illinois, 60611, USA
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Abstract
BACKGROUND Most patients with extratubal ectopic pregnancies present with vaginal bleeding and lower abdominal pain. We report a case of an extratubal ectopic pregnancy with extra-abdominal manifestations. CASE An ectopic pregnancy implanted on the diaphragm resulted in spontaneous hemothorax due to trophoblastic invasion into the pleura. Thoracoscopic excision followed by actinomycin D chemotherapy provided successful resolution of the ectopic pregnancy. CONCLUSION Abdominal pregnancies may have bizarre clinical presentations.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois, USA.
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Fishman DA, Padilla LA, Keh P, Cohen L, Frederiksen M, Lurain JR. Management of twin pregnancies consisting of a complete hydatidiform mole and normal fetus. Obstet Gynecol 1998; 91:546-50. [PMID: 9540938 DOI: 10.1016/s0029-7844(97)00720-5] [Citation(s) in RCA: 43] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To report the clinical features, management, and outcome of twin pregnancies consisting of a complete hydatidiform mole and a coexisting normal fetus. METHODS Between 1966 and 1997, seven women with complete hydatidiform mole and coexisting normal fetus were treated at the John I. Brewer Trophoblastic Disease Center of Northwestern University Medical School. Clinical features, including presenting symptoms, gestational dates, hCG levels, and complications, as well as route of delivery or evacuation, pregnancy outcome, genetic analysis, and need for chemotherapy were assessed. RESULTS Four women required uterine evacuation before 20 weeks' gestation because of vaginal bleeding or medical complications, one woman required an emergency hysterotomy because of hemorrhage at 24 weeks, and two women delivered normal, viable infants at 26 and 34 weeks. The pathologic diagnosis of complete hydatidiform mole was confirmed in each case and the chromosome complement was 46,XX in all molar gestations. Four of seven women required chemotherapy for treatment of nonmetastatic gestational trophoblastic tumors, including both women who delivered viable infants and two of the five women whose pregnancies were evacuated before 24 weeks' gestation. All four patients were treated with five to seven cycles of a 5-day methotrexate regimen and achieved complete remission. CONCLUSION Patients with a twin pregnancy consisting of a complete mole and a normal fetus are at increased risk for hemorrhage and medical complications, as well as the development of persistent gestational trophoblastic tumor.
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Affiliation(s)
- D A Fishman
- John I. Brewer Trophoblastic Disease Center and the Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois, USA.
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Abstract
Epithelial ovarian cancer is the leading cause of death from gynecologic malignancy among North American women. The vast majority of women are diagnosed after the cancer has metastasized into the peritoneum, resulting in a low 5-year survival. Because of difficulties associated with early detection of ovarian carcinoma and the invasive potential of these malignancies, a more detailed understanding of the mechanism(s) by which ovarian carcinomas metastasize may suggest novel therapeutic approaches which could impact favorably on long-term survival. Connective tissue degrading proteinases are necessary for tumor cell invasion and enzymes in the plasminogen activator (PA) and matrix metalloproteinase (MMP) families have been implicated in ovarian cancer metastasis. The goal of this review is to summarize current data regarding the role of these proteinases in ovarian carcinoma invasion.
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Affiliation(s)
- M S Stack
- Northwestern University Medical School, 303 E. Chicago Ave, Tarry 4-751, Chicago, IL 60611, USA
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Fishman DA, Bafetti LM, Banionis S, Kearns AS, Chilukuri K, Stack MS. Production of extracellular matrix-degrading proteinases by primary cultures of human epithelial ovarian carcinoma cells. Cancer 1997. [PMID: 9338470 DOI: 10.1002/(sici)1097-0142(19971015)80:8<1457::aid-cncr13>3.0.co;2-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
BACKGROUND The authors analyzed the secretion of extracellular matrix-degrading proteinases, including urinary-type plasminogen activator (u-PA), matrix metalloproteinase-2 (MMP-2, gelatinase A), and MMP-9 (gelatinase B), by short term primary cultures of epithelial ovarian carcinoma cells derived from primary ovarian tumors, intraperitoneal metastases, or ascites. The presence of these enzymatic activities in samples of ascites was also evaluated. The effect of adhesive substratum on proteinase production was determined. METHODS A coupled spectrophotometric assay was utilized to evaluate the initial rate of plasminogen activation by u-PA in conditioned medium; this involved monitoring the activity of generated plasmin with a colorimetric substrate. MMP activity was evaluated by gelatin zymography. RESULTS Ascitic fluids from 18 patients contained u-PA, MMP-2, and MMP-9. However, short term primary cultures of cells derived from primary ovarian tumors (OVET), metastatic lesions (OVEM), or ascites (OVEA) produced very low levels of u-PA. Production of u-PA by OVET and OVEM cells was regulated by adhesive substratum. Conditioned media from OVET, OVEM, and OVEA cells contained high levels of both MMP-2 and MMP-9. MMP-9 levels decreased with increasing passage in culture, whereas MMP-2 activity was maintained. Production of neither MMP-2 nor MMP-9 was regulated by adhesive substratum. CONCLUSIONS These results demonstrate that primary cultures of epithelial ovarian carcinoma cells derived from three distinct anatomic locations produce MMP-2 and MMP-9, with low level secretion of u-PA. These data suggest that MMPs, particularly MMP-2, may play a significant role in the intraperitoneal invasion of ovarian carcinoma cells.
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Affiliation(s)
- D A Fishman
- Department of Obstetrics and Gynecology, Northwestern University Medical School, Chicago, Illinois 60611, USA
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