1
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Huang PW, Tian N, Rajh T, Liu YH, Innocenti G, Sievers C, Medford AJ, Hatzell MC. Formation of Carbon-Induced Nitrogen-Centered Radicals on Titanium Dioxide under Illumination. JACS Au 2023; 3:3283-3289. [PMID: 38155641 PMCID: PMC10751760 DOI: 10.1021/jacsau.3c00556] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/20/2023] [Accepted: 11/20/2023] [Indexed: 12/30/2023]
Abstract
Titanium dioxide is the most studied photocatalytic material and has been reported to be active for a wide range of reactions, including the oxidation of hydrocarbons and the reduction of nitrogen. However, the molecular-scale interactions between the titania photocatalyst and dinitrogen are still debated, particularly in the presence of hydrocarbons. Here, we used several spectroscopic and computational techniques to identify interactions among nitrogen, methanol, and titania under illumination. Electron paramagnetic resonance spectroscopy (EPR) allowed us to observe the formation of carbon radicals upon exposure to ultraviolet radiation. These carbon radicals are observed to transform into diazo- and nitrogen-centered radicals (e.g., CHxN2• and CHxNHy•) during photoreaction in nitrogen environment. In situ infrared (IR) spectroscopy under the same conditions revealed C-N stretching on titania. Furthermore, density functional theory (DFT) calculations revealed that nitrogen adsorption and the thermodynamic barrier to photocatalytic nitrogen fixation are significantly more favorable in the presence of hydroxymethyl or surface carbon. These results provide compelling evidence that carbon radicals formed from the photooxidation of hydrocarbons interact with dinitrogen and suggest that the role of carbon-based "hole scavengers" and the inertness of nitrogen atmospheres should be reevaluated in the field of photocatalysis.
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Affiliation(s)
- Po-Wei Huang
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Nianhan Tian
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Tijana Rajh
- School
of Molecular Science, Arizona State University, Tempe, Arizona 85281, United States
- Center
of Nanoscale Materials, Argonne National Laboratory, Woodridge, Illinois 60517, United States
| | - Yu-Hsuan Liu
- School
of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Giada Innocenti
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Carsten Sievers
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Andrew J. Medford
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Marta C. Hatzell
- School
of Chemical & Biomolecular Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- George
W .Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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2
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Rajh T, Masson E, Latt KZ, Smith A, Brugh AM, Dandu N, Trainer D, Curtiss LA, Ngo AT, Hla SW. Light- and Chemical-Doping-Induced Magnetic Behavior of Eu Molecular Systems. Inorg Chem 2023; 62:12721-12729. [PMID: 37506323 DOI: 10.1021/acs.inorgchem.3c01154] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Variable temperature electron paramagnetic resonance (VT-EPR) was used to investigate the role of the environment and oxidation states of several coordinated Eu compounds. We find that while Eu(III) chelating complexes are diamagnetic, simple chemical reduction results in the formation of paramagnetic species. In agreement with the distorted D3h symmetry of Eu molecular complexes investigated in this study, the EPR spectrum of reduced complexes showed axially symmetric signals (g⊥ = 2.001 and g∥ = 1.994) that were successfully simulated with two Eu isotopes with nuclear spin 5/2 (151Eu and 153Eu with 48% and 52% natural abundance, respectively) and nuclear g-factors 151Eu/153Eu = 2.27. Illumination of water-soluble complex Eu(dipic)3 at 4 K led to the ligand-to-metal charge transfer (LMCT) that resulted in the formation of Eu(II) in a rhombic environment (gx = 2.006, gy = 1.995, gz = 1.988). The existence of LMCT affects the luminescence of Eu(dipic)3, and pre-reduction of the complex to Eu(II)(dipic)3 reversibly reduces red luminescence with the appearance of a weak CT blue luminescence. Furthermore, encapsulation of a large portion of the dipic ligand with Cucurbit[7]uril, a pumpkin-shaped macrocycle, inhibited ligand-to-metal charge transfer, preventing the formation of Eu(II) upon illumination.
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Affiliation(s)
- Tijana Rajh
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
- School of Molecular Sciences, Arizona State University, 551 E University Dr, Tempe, Arizona 85281, United States
| | - Eric Masson
- Department of Chemistry, Ohio University, Athens, Ohio 45701, United States
| | - Kyaw Zin Latt
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
| | - Ashton Smith
- Department of Chemistry, Ohio University, Athens, Ohio 45701, United States
| | - Alexander M Brugh
- School of Molecular Sciences, Arizona State University, 551 E University Dr, Tempe, Arizona 85281, United States
| | - Naveen Dandu
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60608, United States
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Daniel Trainer
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
| | - Larry A Curtiss
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Anh T Ngo
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60608, United States
- Materials Science Division, Argonne National Laboratory, Lemont, Illinois 60439, United States
| | - Saw-Wai Hla
- Nanoscience and Technology Division, Argonne National Laboratory, 9700 S Cass Ave, Argonne, Illinois 60540, United States
- Nanoscale & Quantum Phenomena Institute, and Department of Physics & Astronomy, Ohio University, Athens, Ohio 45701, United States
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3
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Oanta AK, Collins KA, Evans AM, Pratik SM, Hall LA, Strauss MJ, Marder SR, D'Alessandro DM, Rajh T, Freedman DE, Li H, Brédas JL, Sun L, Dichtel WR. Electronic Spin Qubit Candidates Arrayed within Layered Two-Dimensional Polymers. J Am Chem Soc 2023; 145:689-696. [PMID: 36574726 DOI: 10.1021/jacs.2c11784] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Molecular electronic spin qubits are promising candidates for quantum information science applications because they can be reliably produced and engineered via chemical design. Embedding electronic spin qubits within two-dimensional polymers (2DPs) offers the possibility to systematically engineer inter-qubit interactions while maintaining long coherence times, both of which are prerequisites to their technological utility. Here, we introduce electronic spin qubits into a diamagnetic 2DP by n-doping naphthalene diimide subunits with varying amounts of CoCp2 and analyze their spin densities by quantitative electronic paramagnetic resonance spectroscopy. Low spin densities (e.g., 6.0 × 1012 spins mm-3) enable lengthy spin-lattice (T1) and spin-spin relaxation (T2) times across a range of temperatures, ranging from T1 values of 164 ms at 10 K to 30.2 μs at 296 K and T2 values of 2.36 μs at 10 K to 0.49 μs at 296 K for the lowest spin density sample examined. Higher spin densities and temperatures were both found to diminish T1 times, which we attribute to detrimental cross-relaxation from spin-spin dipolar interactions and spin-phonon coupling, respectively. Higher spin densities decreased T2 times and modulated the T2 temperature dependence. We attribute these differences to the competition between hyperfine and dipolar interactions for electron spin decoherence, with the dominant interaction transitioning from the former to the latter as spin density and temperature increase. Overall, this investigation demonstrates that dispersing electronic spin qubits within layered 2DPs enables chemical control of their inter-qubit interactions and spin decoherence times.
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Affiliation(s)
- Alexander K Oanta
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States
| | - Kelsey A Collins
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States
| | - Austin M Evans
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States
| | - Saied Md Pratik
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona85721, United States
| | - Lyndon A Hall
- School of Chemistry, The University of Sydney, Sydney, NSW2006, Australia
| | - Michael J Strauss
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States
| | - Seth R Marder
- School of Chemistry and Biochemistry and School of Materials Science and Engineering, Center for Organic Photonics and Electronics, Georgia Tech Polymer Network, Georgia Institute of Technology, Atlanta, Georgia30332, United States.,Department of Chemistry, and Department of Chemical and Biological Engineering, Renewable and Sustainable Energy Institute, University of Colorado Boulder, Boulder, Colorado80303, United States
| | | | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois60439, United States.,The School of Molecular Sciences, Arizona State University, Tempe, Arizona85281, United States
| | - Danna E Freedman
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States.,Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Hong Li
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona85721, United States
| | - Jean-Luc Brédas
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, Arizona85721, United States
| | - Lei Sun
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - William R Dichtel
- Department of Chemistry, Northwestern University, Evanston, Illinois60208, United States
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4
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Sun L, Yang L, Dou JH, Li J, Skorupskii G, Mardini M, Tan KO, Chen T, Sun C, Oppenheim JJ, Griffin RG, Dincă M, Rajh T. Room-Temperature Quantitative Quantum Sensing of Lithium Ions with a Radical-Embedded Metal-Organic Framework. J Am Chem Soc 2022; 144:19008-19016. [PMID: 36201712 DOI: 10.1021/jacs.2c07692] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Recent advancements in quantum sensing have sparked transformative detection technologies with high sensitivity, precision, and spatial resolution. Owing to their atomic-level tunability, molecular qubits and ensembles thereof are promising candidates for sensing chemical analytes. Here, we show quantum sensing of lithium ions in solution at room temperature with an ensemble of organic radicals integrated in a microporous metal-organic framework (MOF). The organic radicals exhibit electron spin coherence and microwave addressability at room temperature, thus behaving as qubits. The high surface area of the MOF promotes accessibility of the guest analytes to the organic qubits, enabling unambiguous identification of lithium ions and quantitative measurement of their concentration through relaxometric and hyperfine spectroscopic methods based on electron paramagnetic resonance (EPR) spectroscopy. The sensing principle presented in this work is applicable to other metal ions with nonzero nuclear spin.
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Affiliation(s)
- Lei Sun
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois60439, United States
| | - Luming Yang
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Jin-Hu Dou
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Jian Li
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm10044, Sweden
| | - Grigorii Skorupskii
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Michael Mardini
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States.,Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Kong Ooi Tan
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States.,Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Tianyang Chen
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Chenyue Sun
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Julius J Oppenheim
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Robert G Griffin
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States.,Francis Bitter Magnet Laboratory, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Mircea Dincă
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts02139, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois60439, United States.,The School for Molecular Sciences, Arizona State University, Tempe, Arizona85281, United States
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5
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Rajh T, Koritarov T, Blaiszik B, Rizvi SFZ, Konda V, Bissonnette M. Triggering cell death in cancers using self-illuminating nanocomposites. Front Chem 2022; 10:962161. [PMID: 36186597 PMCID: PMC9521829 DOI: 10.3389/fchem.2022.962161] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 08/22/2022] [Indexed: 11/21/2022] Open
Abstract
Bioinspired photocatalysis has resulted in efficient solutions for many areas of science and technology spanning from solar cells to medicine. Here we show a new bioinspired semiconductor nanocomposite (nanoTiO2-DOPA-luciferase, TiDoL) capable of converting light energy within cancerous tissues into chemical species that are highly disruptive to cell metabolism and lead to cell death. This localized activity of semiconductor nanocomposites is triggered by cancer-generated activators. Adenosine triphosphate (ATP) is produced in excess in cancer tissues only and activates nearby immobilized TiDoL composites, thereby eliminating its off-target toxicity. The interaction of TiDoL with cancerous cells was probed in situ and in real-time to establish a detailed mechanism of nanoparticle activation, triggering of the apoptotic signaling cascade, and finally, cancer cell death. Activation of TiDoL with non-cancerous cells did not result in cell toxicity. Exploring the activation of antibody-targeted semiconductor conjugates using ATP is a step toward a universal approach to single-cell-targeted medical therapies with more precision, efficacy, and potentially fewer side effects.
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Affiliation(s)
- Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, United States
- School of Molecular Sciences, Arizona State University, Tempe, AZ, United States
- *Correspondence: Tijana Rajh,
| | - Tamara Koritarov
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, United States
| | - Ben Blaiszik
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, United States
| | - Syeda Fatima Z. Rizvi
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, United States
| | - Vani Konda
- Department of Medicine, The University of Chicago Medicine, Chicago, IL, United States
| | - Marc Bissonnette
- Department of Medicine, The University of Chicago Medicine, Chicago, IL, United States
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6
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Evans AM, Collins KA, Xun S, Allen TG, Jhulki S, Castano I, Smith HL, Strauss MJ, Oanta AK, Liu L, Sun L, Reid OG, Sini G, Puggioni D, Rondinelli JM, Rajh T, Gianneschi NC, Kahn A, Freedman DE, Li H, Barlow S, Rumbles G, Brédas JL, Marder SR, Dichtel WR. Controlled n-Doping of Naphthalene-Diimide-Based 2D Polymers. Adv Mater 2022; 34:e2101932. [PMID: 34850459 DOI: 10.1002/adma.202101932] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 11/12/2021] [Indexed: 06/13/2023]
Abstract
2D polymers (2DPs) are promising as structurally well-defined, permanently porous, organic semiconductors. However, 2DPs are nearly always isolated as closed shell organic species with limited charge carriers, which leads to low bulk conductivities. Here, the bulk conductivity of two naphthalene diimide (NDI)-containing 2DP semiconductors is enhanced by controllably n-doping the NDI units using cobaltocene (CoCp2 ). Optical and transient microwave spectroscopy reveal that both as-prepared NDI-containing 2DPs are semiconducting with sub-2 eV optical bandgaps and photoexcited charge-carrier lifetimes of tens of nanoseconds. Following reduction with CoCp2 , both 2DPs largely retain their periodic structures and exhibit optical and electron-spin resonance spectroscopic features consistent with the presence of NDI-radical anions. While the native NDI-based 2DPs are electronically insulating, maximum bulk conductivities of >10-4 S cm-1 are achieved by substoichiometric levels of n-doping. Density functional theory calculations show that the strongest electronic couplings in these 2DPs exist in the out-of-plane (π-stacking) crystallographic directions, which indicates that cross-plane electronic transport through NDI stacks is primarily responsible for the observed electronic conductivity. Taken together, the controlled molecular doping is a useful approach to access structurally well-defined, paramagnetic, 2DP n-type semiconductors with measurable bulk electronic conductivities of interest for electronic or spintronic devices.
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Affiliation(s)
- Austin M Evans
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Kelsey A Collins
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Sangni Xun
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, P. R. China
| | - Taylor G Allen
- Center for Chemistry and Nanoscience, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
| | - Samik Jhulki
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Ioannina Castano
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Hannah L Smith
- Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Michael J Strauss
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Alexander K Oanta
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Lujia Liu
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
| | - Lei Sun
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Obadiah G Reid
- Center for Chemistry and Nanoscience, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
- Renewable and Sustainable Energy Institute, Department of Chemistry, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Gjergji Sini
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721, USA
- CY Cergy Paris Université, Laboratoire de Physicochimie des Polymères et des Interfaces, EA 2528, 5 mail Gay-Lussac, Cergy-Pontoise Cedex, 95031, France
| | - Danilo Puggioni
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - James M Rondinelli
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Nathan C Gianneschi
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Materials Science and Engineering, Northwestern University, Evanston, IL, 60208, USA
- International Institute for Nanotechnology, Department of Biomedical Engineering, Department of Pharmacology, Simpson Querrey Institute, and Chemistry of Life Processes Institute, Evanston, IL, 60208, USA
| | - Antoine Kahn
- Department of Electrical and Computer Engineering, Princeton University, Princeton, NJ, 08544, USA
| | - Danna E Freedman
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, MA, 02139, USA
| | - Hong Li
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721, USA
| | - Stephen Barlow
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - Garry Rumbles
- Center for Chemistry and Nanoscience, National Renewable Energy Laboratory, 15013 Denver West Parkway, Golden, CO, 80401, USA
- Renewable and Sustainable Energy Institute, Department of Chemistry, University of Colorado Boulder, Boulder, CO, 80309, USA
| | - Jean-Luc Brédas
- Department of Chemistry and Biochemistry, The University of Arizona, Tucson, AZ, 85721, USA
| | - Seth R Marder
- School of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, GA, 30332, USA
- Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, GA, 30332, USA
| | - William R Dichtel
- Department of Chemistry, Northwestern University, Evanston, IL, 60208, USA
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7
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Shevchenko EV, Podsiadlo P, Wu X, Lee B, Rajh T, Morin R, Pelton M. Visualizing Heterogeneity of Monodisperse CdSe Nanocrystals by Their Assembly into Three-Dimensional Supercrystals. ACS Nano 2020; 14:14989-14998. [PMID: 33073574 DOI: 10.1021/acsnano.0c04864] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We show that the self-assembly of monodisperse CdSe nanocrystals synthesized at lower temperature (∼310 °C) into three-dimensional supercrystals results in the formation of separate regions within the supercrystals that display photoluminescence at two distinctly different wavelengths. Specifically, the central portions of the supercrystals display photoluminescence and absorption in the orange region of the spectrum, around 585 nm, compared to the 575 nm photoluminescence maximum for the nanocrystals dispersed in toluene. Distinct domains on the surfaces and edges of the supercrystals, by contrast, display photoluminescence and absorption in the green region of the spectrum, around 570 nm. We attribute the different-colored domains to two subpopulations of NCs in the monodisperse ensemble: the nanocrystals in the "orange" regions are chemically stable, whereas the nanocrystals in the "green" regions are partially oxidized. The susceptibility of the "green" nanocrystals to oxidation indicates a lower coverage of capping molecules on these nanocrystals. We propose that the two subpopulations correspond to nanocrystals with different surfaces that we attribute to the polytypism of CdSe.
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Affiliation(s)
- Elena V Shevchenko
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Paul Podsiadlo
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- ExxonMobil Research and Engineering Company, Fuels, Process & Optimization Technology Process Engineering Division, 22777 Springwoods Village, Parkway Spring, Texas 77389, United States
| | - Xiaohua Wu
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Mindray, Mindray Building, Hitech Industrial Park, Nanshan District, Shenzhen 518057, China
| | - Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Rachel Morin
- Department of Physics, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 20912, United States
| | - Matthew Pelton
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- Department of Physics, UMBC (University of Maryland, Baltimore County), 1000 Hilltop Circle, Baltimore, Maryland 20912, United States
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8
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Wang L, Liu L, Chen J, Mohsin A, Yum JH, Hudnall TW, Bielawski CW, Rajh T, Bai X, Gao S, Gu G. Synthesis of Honeycomb‐Structured Beryllium Oxide via Graphene Liquid Cells. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lifen Wang
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Lei Liu
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
- Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China
| | - Ji Chen
- Department of Physics and Astronomy London Centre for Nanotechnology Thomas Young Centre University College London London WC1H 0AJ UK
- School of physics Peking University Beijing 100871 China
- Max Planck Institute for Solid State Research 70569 Stuttgart Germany
| | - Ali Mohsin
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
| | - Jung Hwan Yum
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department of Chemistry and Department of Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Todd W. Hudnall
- Department of Chemistry and Biochemistry Texas State University San Marcos TX 78666 USA
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department of Chemistry and Department of Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Tijana Rajh
- Center for Nanoscale Materials Argonne National Laboratory Lemont IL 60439 USA
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Shang‐Peng Gao
- Department of Materials Science Fudan University Shanghai 200433 China
| | - Gong Gu
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
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9
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Wang L, Liu L, Chen J, Mohsin A, Yum JH, Hudnall TW, Bielawski CW, Rajh T, Bai X, Gao S, Gu G. Synthesis of Honeycomb‐Structured Beryllium Oxide via Graphene Liquid Cells. Angew Chem Int Ed Engl 2020; 59:15734-15740. [DOI: 10.1002/anie.202007244] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Lifen Wang
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Lei Liu
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
- Department of Materials Science and Engineering College of Engineering Peking University Beijing 100871 China
| | - Ji Chen
- Department of Physics and Astronomy London Centre for Nanotechnology Thomas Young Centre University College London London WC1H 0AJ UK
- School of physics Peking University Beijing 100871 China
- Max Planck Institute for Solid State Research 70569 Stuttgart Germany
| | - Ali Mohsin
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
| | - Jung Hwan Yum
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department of Chemistry and Department of Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Todd W. Hudnall
- Department of Chemistry and Biochemistry Texas State University San Marcos TX 78666 USA
| | - Christopher W. Bielawski
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department of Chemistry and Department of Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
| | - Tijana Rajh
- Center for Nanoscale Materials Argonne National Laboratory Lemont IL 60439 USA
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China
| | - Shang‐Peng Gao
- Department of Materials Science Fudan University Shanghai 200433 China
| | - Gong Gu
- Department of Electrical Engineering and Computer Science University of Tennessee Knoxville TN 37996 USA
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10
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Zhu L, Jin X, Zhang YY, Du S, Liu L, Rajh T, Xu Z, Wang W, Bai X, Wen J, Wang L. Visualizing Anisotropic Oxygen Diffusion in Ceria under Activated Conditions. Phys Rev Lett 2020; 124:056002. [PMID: 32083924 DOI: 10.1103/physrevlett.124.056002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Revised: 12/16/2019] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
Oxygen reactivity plays a key role in the performance of ceria-based catalysts. Aberration-corrected transmission electron microscopy and molecular dynamics simulations were used to study the oxygen atom diffusion in ceria under activated conditions. Reactive oxygen atom and its real-time diffusion were visualized. The interplay between cerium and oxygen atoms originating from a Coulomb interaction was revealed by the out-of-plane buckling of cerium atoms associated with oxygen transport. Anisotropic oxygen atom diffusion that depends on crystal orientations was discovered, demonstrating a preferential [001] crystallographic diffusion pathway. These findings reveal prospects for applications of anisotropic orientation-relevant fluorite-structured oxides.
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Affiliation(s)
- Liang Zhu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Xin Jin
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yu-Yang Zhang
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Shixuan Du
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Lei Liu
- Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Zhi Xu
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Wenlong Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- School of Physical Sciences and CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing 100190, China
- Songshan Lake Materials Laboratory, Dongguan, Guangdong 523808, China
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
| | - Lifen Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Center for Nanoscale Materials, Argonne National Laboratory, Lemont, Illinois 60439, USA
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11
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Chen Z, Zhang H, Guo P, Zhang J, Tira G, Kim YJ, Wu YA, Liu Y, Wen J, Rajh T, Niklas J, Poluektov OG, Laible PD, Rozhkova EA. Semi-artificial Photosynthetic CO2 Reduction through Purple Membrane Re-engineering with Semiconductor. J Am Chem Soc 2019; 141:11811-11815. [DOI: 10.1021/jacs.9b05564] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Zhaowei Chen
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
- College of Chemistry, Fuzhou University, Fuzhou 350108, China
| | - He Zhang
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Peijun Guo
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Jingjing Zhang
- Joint Center for Energy Storage Research, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Gregory Tira
- Biosciences Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Yu Jin Kim
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Yimin A. Wu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Jianguo Wen
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Jens Niklas
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Oleg G. Poluektov
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Philip D. Laible
- Biosciences Division, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Elena A. Rozhkova
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
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12
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Sheng H, Zheng H, Jia S, Chan MKY, Rajh T, Wang J, Wen J. Atomistic manipulation of reversible oxidation and reduction in Ag with an electron beam. Nanoscale 2019; 11:10756-10762. [PMID: 31120466 DOI: 10.1039/c8nr09525f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Employing electrons for direct control of a nanoscale reaction is highly desirable since it enables fabrication of nanostructures with different properties at atomic resolution and with flexibility of dimensions and location. Here, applying in situ transmission electron microscopy, we show the reversible oxidation and reduction kinetics in Ag, well controlled by changing the dose rate of the electron beam. Aberration-corrected high-resolution transmission electron microscopy observation reveals that O atoms are preferably inserted and extracted along the {111} close-packed planes of Ag, leading to the nucleation and decomposition of nanoscale Ag2O islands on the Ag substrate. By controlling the electron beam size and dose rate, we demonstrated the fabrication of an array of 3 nm Ag2O nanodots in an Ag matrix. Our results open a new pathway to manipulate an atomistic reaction with an electron beam towards the precise fabrication of nanostructures for device applications.
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Affiliation(s)
- Huaping Sheng
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL 60439, USA.
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13
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Chen Z, De Queiros Silveira G, Ma X, Xie Y, Wu YA, Barry E, Rajh T, Fry HC, Laible PD, Rozhkova EA. Light‐Gated Synthetic Protocells for Plasmon‐Enhanced Chemiosmotic Gradient Generation and ATP Synthesis. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201813963] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Zhaowei Chen
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
| | | | - Xuedan Ma
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
| | - Yunsong Xie
- Applied Materials Division Argonne National Laboratory Argonne IL 60439 USA
| | - Yimin A. Wu
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
| | - Edward Barry
- Applied Materials Division Argonne National Laboratory Argonne IL 60439 USA
| | - Tijana Rajh
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
| | - H. Christopher Fry
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
| | - Philip D. Laible
- Biosciences Division Argonne National Laboratory Argonne IL 60439 USA
| | - Elena A. Rozhkova
- Center for Nanoscale Materials Argonne National Laboratory Argonne IL 60439 USA
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14
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Chen Z, De Queiros Silveira G, Ma X, Xie Y, Wu YA, Barry E, Rajh T, Fry HC, Laible PD, Rozhkova EA. Light-Gated Synthetic Protocells for Plasmon-Enhanced Chemiosmotic Gradient Generation and ATP Synthesis. Angew Chem Int Ed Engl 2019; 58:4896-4900. [PMID: 30701643 DOI: 10.1002/anie.201813963] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/17/2019] [Indexed: 11/08/2022]
Abstract
Herein, we present a light-gated protocell model made of plasmonic colloidal capsules (CCs) assembled with bacteriorhodopsin for converting solar energy into electrochemical gradients to drive the synthesis of energy-storage molecules. This synthetic protocell incorporated an important intrinsic property of noble metal colloidal particles, namely, plasmonic resonance. In particular, the near-field coupling between adjacent metal nanoparticles gave rise to strongly localized electric fields and resulted in a broad absorption in the whole visible spectra, which in turn promoted the flux of photons to bacteriorhodopsin and accelerated the proton pumping kinetics. The cell-like potential of this design was further demonstrated by leveraging the outward pumped protons as "chemical signals" for triggering ATP biosynthesis in a coexistent synthetic protocell population. Hereby, we lay the ground work for the engineering of colloidal supraparticle-based synthetic protocells with higher-order functionalities.
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Affiliation(s)
- Zhaowei Chen
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | | | - Xuedan Ma
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Yunsong Xie
- Applied Materials Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Yimin A Wu
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Edward Barry
- Applied Materials Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - H Christopher Fry
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Philip D Laible
- Biosciences Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Elena A Rozhkova
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, 60439, USA
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15
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Srivastava V, Liu W, Janke EM, Kamysbayev V, Filatov AS, Sun CJ, Lee B, Rajh T, Schaller RD, Talapin DV. Understanding and Curing Structural Defects in Colloidal GaAs Nanocrystals. Nano Lett 2017; 17:2094-2101. [PMID: 28191964 DOI: 10.1021/acs.nanolett.7b00481] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
GaAs is one of the most important semiconductors. However, colloidal GaAs nanocrystals remain largely unexplored because of the difficulties with their synthesis. Traditional synthetic routes either fail to produce pure GaAs phase or result in materials whose optical properties are very different from the behavior expected for quantum dots of direct-gap semiconductors. In this work, we demonstrate a variety of synthetic routes toward crystalline GaAs NCs. By using a combination of Raman, EXAFS, transient absorption, and EPR spectroscopies, we conclude that unusual optical properties of colloidal GaAs NCs can be related to the presence of Ga vacancies and lattice disorder. These defects do not manifest themselves in TEM images and powder X-ray diffraction patterns but are responsible for the lack of absorption features even in apparently crystalline GaAs nanoparticles. We introduce a novel molten salt based annealing approach to alleviate these structural defects and show the emergence of size-dependent excitonic transitions in colloidal GaAs quantum dots.
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Affiliation(s)
- Vishwas Srivastava
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Wenyong Liu
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Eric M Janke
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Vladislav Kamysbayev
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Alexander S Filatov
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
| | - Cheng-Jun Sun
- Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States
| | - Richard D Schaller
- Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States
- Department of Chemistry, Northwestern University , Evanston, Illinois 60208, United States
| | - Dmitri V Talapin
- Department of Chemistry and James Franck Institute, University of Chicago , Chicago, Illinois 60637, United States
- Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States
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16
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Liu C, Jin T, Louis ME, Pantovich SA, Skraba-Joiner SL, Rajh T, Li G. Molecular deposition of a macrocyclic cobalt catalyst on TiO2 nanoparticles. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.molcata.2016.07.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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17
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Goldstein S, Behar D, Rajh T, Rabani J. Nitrite Reduction to Nitrous Oxide and Ammonia by TiO2 Electrons in a Colloid Solution via Consecutive One-Electron Transfer Reactions. J Phys Chem A 2016; 120:2307-12. [DOI: 10.1021/acs.jpca.6b01761] [Citation(s) in RCA: 13] [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: 11/29/2022]
Affiliation(s)
- Sara Goldstein
- Institute
of Chemistry and the Accelerator Laboratory, The Edmond Safra Campus, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - David Behar
- Institute
of Chemistry and the Accelerator Laboratory, The Edmond Safra Campus, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Tijana Rajh
- Center
for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Joseph Rabani
- Institute
of Chemistry and the Accelerator Laboratory, The Edmond Safra Campus, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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18
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Wu YA, Li L, Li Z, Kinaci A, Chan MKY, Sun Y, Guest JR, McNulty I, Rajh T, Liu Y. Visualizing Redox Dynamics of a Single Ag/AgCl Heterogeneous Nanocatalyst at Atomic Resolution. ACS Nano 2016; 10:3738-3746. [PMID: 26937679 DOI: 10.1021/acsnano.6b00355] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Operando characterization of gas-solid reactions at the atomic scale is of great importance for determining the mechanism of catalysis. This is especially true in the study of heterostructures because of structural correlation between the different parts. However, such experiments are challenging and have rarely been accomplished. In this work, atomic scale redox dynamics of Ag/AgCl heterostructures have been studied using in situ environmental transmission electron microscopy (ETEM) in combination with density function theory (DFT) calculations. The reduction of Ag/AgCl to Ag is likely a result of the formation of Cl vacancies while Ag(+) ions accept electrons. The oxidation process of Ag/AgCl has been observed: rather than direct replacement of Cl by O, the Ag/AgCl nanocatalyst was first reduced to Ag, and then Ag was oxidized to different phases of silver oxide under different O2 partial pressures. Ag2O formed at low O2 partial pressure, whereas AgO formed at atmospheric pressure. By combining in situ ETEM observation and DFT calculations, this structural evolution is characterized in a distinct nanoscale environment.
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Affiliation(s)
- Yimin A Wu
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Liang Li
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Zheng Li
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Alper Kinaci
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Maria K Y Chan
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yugang Sun
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jeffrey R Guest
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Ian McNulty
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory , 9700 South Cass Avenue, Argonne, Illinois 60439, United States
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19
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Tepavcevic S, Liu Y, Zhou D, Lai B, Maser J, Zuo X, Chan H, Král P, Johnson CS, Stamenkovic V, Markovic NM, Rajh T. Nanostructured Layered Cathode for Rechargeable Mg-Ion Batteries. ACS Nano 2015; 9:8194-8205. [PMID: 26169073 DOI: 10.1021/acsnano.5b02450] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Nanostructured bilayered V2O5 was electrochemically deposited within a carbon nanofoam conductive support. As-prepared electrochemically synthesized bilayered V2O5 incorporates structural water and hydroxyl groups, which effectively stabilizes the interlayers and provides coordinative preference to the Mg(2+) cation in reversible cycling. This open-framework electrode shows reversible intercalation/deintercalation of Mg(2+) ions in common electrolytes such as acetonitrile. Using a scanning transmission electron microscope we demonstrate that Mg(2+) ions can be effectively intercalated into the interlayer spacing of nanostructured V2O5, enabling electrochemical magnesiation against a Mg anode with a specific capacity of 240 mAh/g. We employ HRTEM and X-ray fluorescence (XRF) imaging to understand the role of environment in the intercalation processes. A rebuilt full cell was tested by employing a high-energy ball-milled Sn alloy anode in acetonitrile with Mg(ClO4)2 salt. XRF microscopy reveals effective insertion of Mg ions throughout the V2O5 structure during discharge and removal of Mg ions during electrode charging, in agreement with the electrode capacity. We show using XANES and XRF microscopy that reversible Mg intercalation is limited by the anode capacity.
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Affiliation(s)
- Sanja Tepavcevic
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Yuzi Liu
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Dehua Zhou
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Barry Lai
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Jorg Maser
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Xiaobing Zuo
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Henry Chan
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Petr Král
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Christopher S Johnson
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Vojislav Stamenkovic
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Nenad M Markovic
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, ‡Chemical Sciences and Engineering Division, §X-ray Science Division, and #Materials Science Division, Argonne National Laboratory , 9700 S. Cass Avenue, Argonne, Illinois 60439, United States
- Chemistry Department and ∥Physics Department, University of Illinois at Chicago , Chicago, Illinois 60607, United States
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20
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Goldstein S, Behar D, Rajh T, Rabani J. Nitric Oxide Reduction to Ammonia by TiO2 Electrons in Colloid Solution via Consecutive One-Electron Transfer Steps. J Phys Chem A 2015; 119:2760-9. [DOI: 10.1021/jp5102863] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara Goldstein
- Institute
of Chemistry and the Accelerator Laboratory, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - David Behar
- Institute
of Chemistry and the Accelerator Laboratory, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Tijana Rajh
- Center
for Nanoscale
Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Joseph Rabani
- Institute
of Chemistry and the Accelerator Laboratory, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
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21
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Zhang J, Rowland C, Liu Y, Xiong H, Kwon S, Shevchenko E, Schaller RD, Prakapenka VB, Tkachev S, Rajh T. Evolution of self-assembled ZnTe magic-sized nanoclusters. J Am Chem Soc 2015; 137:742-9. [PMID: 25531438 DOI: 10.1021/ja509782n] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Three families of ZnTe magic-sized nanoclusters (MSNCs) were obtained exclusively using polytellurides as a tellurium precursor in a one-pot reaction by simply varying the reaction temperature and time only. Different ZnTe MSNCs exhibit different self-assembling or aggregation behavior, owing to their different structure, cluster size, and dipole-dipole interactions. The smallest family of ZnTe MSNCs (F323) does not reveal a crystalline structure and as a result assembles into lamellar triangle plates. Continuous heating of as synthesized ZnTe F323 assemblies resulted in the formation of ZnTe F398 MSNCs with wurzite structure and concomitant transformation into lamellar rectangle assemblies with the organization of nanoclusters along the ⟨002⟩ direction. Further annealing of ZnTe F398 assembled lamellar rectangles leads to full organization of MSNCs in all directions and formation of larger ZnTe F444 NCs that spontaneously form ultrathin nanowires following an oriented attachment mechanism. The key step in control over the size distribution of ZnTe ultrathin nanowires is, in fact, the growth mechanism of ZnTe F398 MSNCs; namely, the step growth mechanism enables formation of more uniform nanowires compared to those obtained by continuous growth mechanism. High yield of ZnTe nanowires is achieved as a result of the wurzite structure of F398 precursor. Transient absorption (TA) measurements show that all three families possess ultrafast dynamics of photogenerated electrons, despite their different crystalline structures.
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Affiliation(s)
- Jun Zhang
- State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum , Qingdao 266580, P. R. China
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22
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Affiliation(s)
- Tijana Rajh
- Center
for Nanoscale Materials, Argonne National Laboratory, 9700 South
Cass Avenue, Argonne, Illinois 60540, United States
| | - Nada M. Dimitrijevic
- Center
for Nanoscale Materials, Argonne National Laboratory, 9700 South
Cass Avenue, Argonne, Illinois 60540, United States
| | - Marc Bissonnette
- Department
of Medicine, The University of Chicago Medicine, 5841 South Maryland Avenue, MC 4076, Chicago, Illinois 60637, United States
| | - Tamara Koritarov
- Center
for Nanoscale Materials, Argonne National Laboratory, 9700 South
Cass Avenue, Argonne, Illinois 60540, United States
- School
of Medicine, Boston University, 72 East Concord Street, Boston, Massachusetts 02118, United States
| | - Vani Konda
- Department
of Medicine, The University of Chicago Medicine, 5841 South Maryland Avenue, MC 4076, Chicago, Illinois 60637, United States
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23
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Wang P, Dimitrijevic NM, Chang AY, Schaller RD, Liu Y, Rajh T, Rozhkova EA. Photoinduced electron transfer pathways in hydrogen-evolving reduced graphene oxide-boosted hybrid nano-bio catalyst. ACS Nano 2014; 8:7995-8002. [PMID: 25050831 DOI: 10.1021/nn502011p] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photocatalytic production of clean hydrogen fuels using water and sunlight has attracted remarkable attention due to the increasing global energy demand. Natural and synthetic dyes can be utilized to sensitize semiconductors for solar energy transformation using visible light. In this study, reduced graphene oxide (rGO) and a membrane protein bacteriorhodopsin (bR) were employed as building modules to harness visible light by a Pt/TiO2 nanocatalyst. Introduction of the rGO boosts the nano-bio catalyst performance that results in hydrogen production rates of approximately 11.24 mmol of H2 (μmol protein)(-1) h(-1). Photoelectrochemical measurements show a 9-fold increase in photocurrent density when TiO2 electrodes were modified with rGO and bR. Electron paramagnetic resonance and transient absorption spectroscopy demonstrate an interfacial charge transfer from the photoexcited rGO to the semiconductor under visible light.
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Affiliation(s)
- Peng Wang
- Center for Nanoscale Materials and ‡Chemical Sciences and Engineering Division, Argonne National Laboratory , Argonne, Illinois 60439, United States
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24
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Fry HC, Liu Y, Dimitrijevic NM, Rajh T. Photoinitiated [corrected] charge separation in a hybrid titanium dioxide metalloporphyrin peptide material. Nat Commun 2014; 5:4606. [PMID: 25132637 DOI: 10.1038/ncomms5606] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 07/07/2014] [Indexed: 02/06/2023] Open
Abstract
In natural systems, electron flow is mediated by proteins that spatially organize donor and acceptor molecules with great precision. Achieving this guided, directional flow of information is a desirable feature in photovoltaic media. Here, we design self-assembled peptide materials that organize multiple electronic components capable of performing photoinduced charge separation. Two peptides, c16-AHL3K3-CO2H and c16-AHL3K9-CO2H, self-assemble into fibres and provide a scaffold capable of binding a metalloporphyrin via histidine axial ligation and mineralize titanium dioxide (TiO2) on the lysine-rich surface of the resulting fibrous structures. Electron paramagnetic resonance studies of this self-assembled material under continuous light excitation demonstrate charge separation induced by excitation of the metalloporphyrin and mediated by the peptide assembly structure. This approach to dye-sensitized semiconducting materials offers a means to spatially control the dye molecule with respect to the semiconducting material through careful, strategic peptide design.
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Affiliation(s)
- H Christopher Fry
- Argonne National Laboratory, Center for Nanoscale Materials, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Yuzi Liu
- Argonne National Laboratory, Center for Nanoscale Materials, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Nada M Dimitrijevic
- Argonne National Laboratory, Center for Nanoscale Materials, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
| | - Tijana Rajh
- Argonne National Laboratory, Center for Nanoscale Materials, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
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25
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Koo B, Goli P, Sumant AV, dos Santos Claro PC, Rajh T, Johnson CS, Balandin AA, Shevchenko EV. Toward lithium ion batteries with enhanced thermal conductivity. ACS Nano 2014; 8:7202-7207. [PMID: 24995678 DOI: 10.1021/nn502212b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
As batteries become more powerful and utilized in diverse applications, thermal management becomes one of the central problems in their application. We report the results on thermal properties of a set of different Li-ion battery electrodes enhanced with multiwalled carbon nanotubes. Our measurements reveal that the highest in-plane and cross-plane thermal conductivities achieved in the carbon-nanotube-enhanced electrodes reached up to 141 and 3.6 W/mK, respectively. The values for in-plane thermal conductivity are up to 2 orders of magnitude higher than those for conventional electrodes based on carbon black. The electrodes were synthesized via an inexpensive scalable filtration method, and we demonstrate that our approach can be extended to commercial electrode-active materials. The best performing electrodes contained a layer of γ-Fe2O3 nanoparticles on carbon nanotubes sandwiched between two layers of carbon nanotubes and had in-plane and cross-plane thermal conductivities of ∼50 and 3 W/mK, respectively, at room temperature. The obtained results are important for thermal management in Li-ion and other high-power-density batteries.
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Affiliation(s)
- Bonil Koo
- Center for Nanoscale Materials and ‡Chemical Sciences and Engineering, Argonne National Laboratory , Argonne, Illinois 60439, United States
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26
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Megiatto Jr JD, Méndez-Hernández DD, Tejeda-Ferrari ME, Teillout AL, Llansola-Portolés MJ, Kodis G, Poluektov OG, Rajh T, Mujica V, Groy TL, Gust D, Moore TA, Moore AL. A bioinspired redox relay that mimics radical interactions of the Tyr–His pairs of photosystem II. Nat Chem 2014; 6:423-8. [DOI: 10.1038/nchem.1862] [Citation(s) in RCA: 119] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Accepted: 12/20/2013] [Indexed: 11/09/2022]
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27
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Peng R, Lin C, Baltrusaitis J, Wu CM, Dimitrijevic NM, Rajh T, May S, Koodali RT. Insight into band positions and inter-particle electron transfer dynamics between CdS nanoclusters and spatially isolated TiO2dispersed in cubic MCM-48 mesoporous materials: a highly efficient system for photocatalytic hydrogen evolution under visible light illumination. Phys Chem Chem Phys 2014; 16:2048-61. [DOI: 10.1039/c3cp52801d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Balasubramanian S, Wang P, Schaller RD, Rajh T, Rozhkova EA. High-performance bioassisted nanophotocatalyst for hydrogen production. Nano Lett 2013; 13:3365-3371. [PMID: 23808953 DOI: 10.1021/nl4016655] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Nanophotocatalysis is one of the potentially efficient ways of capturing and storing solar energy. Biological energy systems that are intrinsically nanoscaled can be employed as building blocks for engineering nanobio-photocatalysts with tunable properties. Here, we report upon the application of light harvesting proton pump bacteriorhodopsin (bR) assembled on Pt/TiO2 nanocatalyst for visible light-driven hydrogen generation. The hybrid system produces 5275 μmole of H2 (μmole protein)(-1) h(-1) at pH 7 in the presence of methanol as a sacrificial electron donor under white light. Photoelectrochemical and transient absorption studies indicate efficient charge transfer between bR protein molecules and TiO2 nanoparticles.
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Affiliation(s)
- Shankar Balasubramanian
- Center for Nanoscale Materials, Argonne National Laboratory , Argonne, Illinois 60439, United States
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29
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Grabstanowicz LR, Gao S, Li T, Rickard RM, Rajh T, Liu DJ, Xu T. Facile Oxidative Conversion of TiH2 to High-Concentration Ti3+-Self-Doped Rutile TiO2 with Visible-Light Photoactivity. Inorg Chem 2013; 52:3884-90. [DOI: 10.1021/ic3026182] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Lauren R. Grabstanowicz
- Department
of Chemistry and
Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
| | - Shanmin Gao
- Department
of Chemistry and
Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
| | | | - Robert M. Rickard
- Department
of Chemistry and
Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
| | | | | | - Tao Xu
- Department
of Chemistry and
Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States
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30
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Abstract
Self-assembly of Au nanoparticles (NPs) coated with positively charged cetyltrimethylammonium ions (CTA(+)) and negatively charged citrate ions in aqueous liquid cell was investigated by in situ transmission electron microscopy (TEM). Under electron illumination in TEM, the hydrated electrons will reduce the overall positive charges of the CTA(+) covered Au NPs and decrease the repulsive electrostatic forces among NPs, leading to assembly of individual NPs into one-dimensional structures. On the contrary, the negatively charged Au NPs coated with citrate ions are steady in liquid cell regardless of electron beam intensity.
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Affiliation(s)
- Yuzi Liu
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinios 60439, USA.
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31
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Xiong H, Yildirim H, Podsiadlo P, Zhang J, Prakapenka VB, Greeley JP, Shevchenko EV, Zhuravlev KK, Tkachev S, Sankaranarayanan SKRS, Rajh T. Compositional tuning of structural stability of lithiated cubic titania via a vacancy-filling mechanism under high pressure. Phys Rev Lett 2013; 110:078304. [PMID: 25166416 DOI: 10.1103/physrevlett.110.078304] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2012] [Indexed: 06/03/2023]
Abstract
Experimental and theoretical studies on the compositional dependence of stability and compressibility in lithiated cubic titania are presented. The crystalline-to-amorphous phase transition pressure increases monotonically with Li concentration (from ∼17.5 GPa for delithiated to no phase transition for fully lithiated cubic titania up to 60 GPa). The associated enhancement in structural stability is postulated to arise from a vacancy filling mechanism in which an applied pressure drives interstitial Li ions to vacancy sites in the oxide interior. The results are of significance for understanding mechanisms of structural response of metal oxide electrode materials at high pressures as well as emerging energy storage technologies utilizing such materials.
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Affiliation(s)
- Hui Xiong
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Handan Yildirim
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Paul Podsiadlo
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Jun Zhang
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Vitali B Prakapenka
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Jeffrey P Greeley
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Elena V Shevchenko
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
| | - Kirill K Zhuravlev
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA
| | - Sergey Tkachev
- Center for Advanced Radiation Sources, University of Chicago, Chicago, Illinois 60637, USA
| | | | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, Illinois 60439, USA
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32
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Finkelstein-Shapiro D, Petrosko SH, Dimitrijevic NM, Gosztola D, Gray KA, Rajh T, Tarakeshwar P, Mujica V. CO2 Preactivation in Photoinduced Reduction via Surface Functionalization of TiO2 Nanoparticles. J Phys Chem Lett 2013; 4:475-479. [PMID: 26281743 DOI: 10.1021/jz3020327] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Salicylate and salicylic acid derivatives act as electron donors via charge-transfer complexes when adsorbed on semiconducting surfaces. When photoexcited, charge is injected into the conduction band directly from their highest occupied molecular orbital (HOMO) without needing mediation by the lowest unoccupied molecular orbital (LUMO). In this study, we successfully induce the chemical participation of carbon dioxide in a charge transfer state using 3-aminosalicylic acid (3ASA). We determine the geometry of CO2 using a combination of ultraviolet-visible spectroscopy (UV-vis), surface enhanced Raman scattering (SERS), (13)C NMR, and electron paramagnetic resonance (EPR). We find CO2 binds on Ti sites in a carbonate form and discern via EPR a surface Ti-centered radical in the vicinity of CO2, suggesting successful charge transfer from the sensitizer to the neighboring site of CO2. This study opens the possibility of analyzing the structural and electronic properties of the anchoring sites for CO2 on semiconducting surfaces and proposes a set of tools and experiments to do so.
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Affiliation(s)
- Daniel Finkelstein-Shapiro
- †Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- ‡Institute for Catalysis in Energy Processes, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Sarah Hurst Petrosko
- §Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Nada M Dimitrijevic
- ‡Institute for Catalysis in Energy Processes, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- §Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- #Chemical Sciences and Engineering Division, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - David Gosztola
- §Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Kimberly A Gray
- ‡Institute for Catalysis in Energy Processes, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- ⊥Department of Civil and Environmental Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
| | - Tijana Rajh
- §Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Pilarisetty Tarakeshwar
- ∥Department of Chemistry and Biochemistry, Arizona State University, Physical Sciences Building, Room D-102, P.O. Box 871604, Tempe, Arizona 85287, United States
| | - Vladimiro Mujica
- †Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States
- §Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, United States
- ∥Department of Chemistry and Biochemistry, Arizona State University, Physical Sciences Building, Room D-102, P.O. Box 871604, Tempe, Arizona 85287, United States
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33
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Peng R, Wu CM, Baltrusaitis J, Dimitrijevic NM, Rajh T, Koodali RT. Ultra-stable CdS incorporated Ti-MCM-48 mesoporous materials for efficient photocatalytic decomposition of water under visible light illumination. Chem Commun (Camb) 2013; 49:3221-3. [DOI: 10.1039/c3cc41362d] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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34
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Lee N, Hummer DR, Sverjensky DA, Rajh T, Hazen RM, Steele A, Cody GD. Speciation of L-DOPA on nanorutile as a function of pH and surface coverage using surface-enhanced Raman spectroscopy (SERS). Langmuir 2012; 28:17322-17330. [PMID: 23163294 DOI: 10.1021/la303607a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The adsorption configuration of organic molecules on mineral surfaces is of great interest because it can provide fundamental information for both engineered and natural systems. Here we have conducted surface-enhanced Raman spectroscopy (SERS) measurements to probe the attachment configurations of DOPA on nanorutile particles under different pH and surface coverage conditions. The Raman signal enhancement arises when a charge transfer (CT) complex forms between the nanoparticles and adsorbed DOPA. This Raman signal is exclusively from the surface-bound complexes with great sensitivity to the binding and orientation of the DOPA attached to the TiO(2) surface. Our SERS spectra show peaks that progressively change with pH and surface coverage, indicating changing surface speciation. At low pH and surface coverage, DOPA adsorbs on the surface lying down, with probably three points of attachment, whereas at higher pH and surface coverage DOPA stands up on the surface as a species involving two attachment points via the two phenolic oxygens. Our results demonstrate experimentally the varying proportions of the two surface species as a function of environmental conditions consistent with published surface complexation modeling. This observation opens up the possibility to manipulate organic molecule attachment in engineered systems such as biodetection devices. Furthermore, it provides a perspective on the possible role of mineral surfaces in the chemical evolution of biomolecules on the early Earth. Adsorbed biomolecules on mineral surface in certain configurations may have had an advantage for subsequent condensation reactions, facilitating the formation of peptides.
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Affiliation(s)
- Namhey Lee
- Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, Maryland 21218, United States.
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35
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Koo B, Xiong H, Slater MD, Prakapenka VB, Balasubramanian M, Podsiadlo P, Johnson CS, Rajh T, Shevchenko EV. Hollow iron oxide nanoparticles for application in lithium ion batteries. Nano Lett 2012; 12:2429-35. [PMID: 22468698 DOI: 10.1021/nl3004286] [Citation(s) in RCA: 176] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Material design in terms of their morphologies other than solid nanoparticles can lead to more advanced properties. At the example of iron oxide, we explored the electrochemical properties of hollow nanoparticles with an application as a cathode and anode. Such nanoparticles contain very high concentration of cation vacancies that can be efficiently utilized for reversible Li ion intercalation without structural change. Cycling in high voltage range results in high capacity (∼132 mAh/g at 2.5 V), 99.7% Coulombic efficiency, superior rate performance (133 mAh/g at 3000 mA/g) and excellent stability (no fading at fast rate during more than 500 cycles). Cation vacancies in hollow iron oxide nanoparticles are also found to be responsible for the enhanced capacity in the conversion reactions. We monitored in situ structural transformation of hollow iron oxide nanoparticles by synchrotron X-ray absorption and diffraction techniques that provided us clear understanding of the lithium intercalation processes during electrochemical cycling.
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Affiliation(s)
- Bonil Koo
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA.
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36
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Rozhkova EA, Ulasov IV, Kim DH, Dimitrijevic NM, Novosad V, Bader SD, Lesniak MS, Rajh T. MULTIFUNCTIONAL NANO-BIO MATERIALS WITHIN CELLULAR MACHINERY. Int J Nanosci 2012; 10:899. [PMID: 23105163 DOI: 10.1142/s0219581x11009350] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Functional nanoscale materials that possess specific physical or chemical properties can leverage energy transduction in vivo. Once these materials integrate with biomolecules they combine physical properties of inorganic material and the biorecognition capabilities of bio-organic moieties. Such nano-bio hybrids can be interfaced with living cells, the elementary functional units of life. These nano-bio systems are capable of bio-manipulation or actuation via altering intracellular biochemical pathways. Thus, nano-bio conjugates are appealing for a wide range of applications from the life sciences and nanomedicine to catalysis and clean energy production. Here we highlight recent progress in our efforts to develop smart nano-bio hybrid materials, and to study their performance within cellular machinery under application of external stimuli, such as light or magnetic fields.
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Affiliation(s)
- E A Rozhkova
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, USA
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37
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Tepavcevic S, Xiong H, Stamenkovic VR, Zuo X, Balasubramanian M, Prakapenka VB, Johnson CS, Rajh T. Nanostructured bilayered vanadium oxide electrodes for rechargeable sodium-ion batteries. ACS Nano 2012; 6:530-538. [PMID: 22148185 DOI: 10.1021/nn203869a] [Citation(s) in RCA: 116] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Tailoring nanoarchitecture of materials offers unprecedented opportunities in utilization of their functional properties. Nanostructures of vanadium oxide, synthesized by electrochemical deposition, are studied as a cathode material for rechargeable Na-ion batteries. Ex situ and in situ synchrotron characterizations revealed the presence of an electrochemically responsive bilayered structure with adjustable intralayer spacing that accommodates intercalation of Na(+) ions. Sodium intake induces organization of overall structure with appearance of both long- and short-range order, while deintercalation is accompanied with the loss of long-range order, whereas short-range order is preserved. Nanostructured electrodes achieve theoretical reversible capacity for Na(2)V(2)O(5) stochiometry of 250 mAh/g. The stability evaluation during charge-discharge cycles at room temperature revealed an efficient 3 V cathode material with superb performance: energy density of ~760 Wh/kg and power density of 1200 W/kg. These results demonstrate feasibility of development of the ambient temperature Na-ion rechargeable batteries by employment of electrodes with tailored nanoarchitectures.
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Affiliation(s)
- Sanja Tepavcevic
- Center for Nanoscale Materials, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, Illinois 60439, USA
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38
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Cage B, McNeely JH, Davis K, Mihovilovich AJ, Gopalakrishnan B, Haferkamp B, Rajh T, Santarsiero BD. Erratum to “Magnetization and EPR of a series of Cr3+ squarate dimers” [Polyhedron 29 (2010) 3021–3027]. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.07.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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39
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Zhang J, Jin S, Fry HC, Peng S, Shevchenko E, Wiederrecht GP, Rajh T. Synthesis and Characterization of Wurtzite ZnTe Nanorods with Controllable Aspect Ratios. J Am Chem Soc 2011; 133:15324-7. [DOI: 10.1021/ja206309h] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jun Zhang
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Shengye Jin
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208, United States
| | - H. Christopher Fry
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Sheng Peng
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Elena Shevchenko
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
| | - Gary P. Wiederrecht
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
- Argonne-Northwestern Solar Energy Research (ANSER) Center, Northwestern University, Evanston, Illinois 60208, United States
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, United States
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40
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Dimitrijevic NM, Vijayan BK, Poluektov OG, Rajh T, Gray KA, He H, Zapol P. Role of Water and Carbonates in Photocatalytic Transformation of CO2 to CH4 on Titania. J Am Chem Soc 2011; 133:3964-71. [DOI: 10.1021/ja108791u] [Citation(s) in RCA: 364] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
| | - Baiju K. Vijayan
- Department of Civil & Environmental Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | | | | | - Kimberly A. Gray
- Department of Civil & Environmental Engineering, Northwestern University, Evanston, Illinois 60208, United States
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41
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Abstract
Semiconductor photocatalysis using nanoparticulate TiO(2) has proven to be a promising technology for use in catalytic reactions, in the cleanup of water contaminated with hazardous industrial by-products, and in nanocrystalline solar cells as a photoactive material. Metal oxide semiconductor colloids are of considerable interest because of their photocatalytic properties. The coordination sphere of the surface metal atoms is incomplete and thus traps light-induced charges, but also exhibits high affinity for oxygen-containing ligands and gives the opportunity for chemical modification. We use enediol linkers, such as dopamine and its analogs, to bridge the semiconductors to biomolecules such as DNA or proteins. Nanobio hybrids that combine the physical robustness and chemical reactivity of nanoscale metal oxides with the molecular recognition and selectivity of biomolecules were developed. Control of chemical processes within living cells was achieved using TiO(2) nanocomposites in order to develop new tools for advanced nanotherapeutics. Here, we describe general experimental approaches for synthesis and characterization of high crystallinity, water soluble 5 nm TiO(2) particles and their nanobio composites, methods of cellular sample preparation for advanced Synchrotron-based imaging of nanoparticles in single cell X-ray fluorescence, and a detailed experimental setup for application of the high-performance TiO(2)-based nanobio photocatalyst for targeted lysis of cancerous or other disordered cells.
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Affiliation(s)
- Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, IL, USA
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42
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Finkelstein-Shapiro D, Tarakeshwar P, Rajh T, Mujica V. Photoinduced Kinetics of SERS in Bioinorganic Hybrid Systems. A Case Study: Dopamine−TiO2. J Phys Chem B 2010; 114:14642-5. [DOI: 10.1021/jp1023718] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Daniel Finkelstein-Shapiro
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439
| | - Pilarisetty Tarakeshwar
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439
| | - Tijana Rajh
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439
| | - Vladimiro Mujica
- Department of Chemistry, Northwestern University, Evanston, Illinois 60208, Department of Chemistry and Biochemistry, Arizona State University, Tempe, Arizona 85287-1604, and Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439
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Li J, Chaudhary A, Chmura SJ, Pelizzari C, Rajh T, Wietholt C, Kurtoglu M, Aydogan B. A novel functional CT contrast agent for molecular imaging of cancer. Phys Med Biol 2010; 55:4389-97. [PMID: 20647599 DOI: 10.1088/0031-9155/55/15/013] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The purpose of this study was to investigate the feasibility of using a 2-deoxy-d-glucose (2-DG) labeled gold nanoparticle (AuNP-2-DG) as a functionally targeted computed tomography (CT) contrast agent to obtain high-resolution metabolic and anatomic information of tumor in a single CT scan. Gold nanoparticles (AuNPs) were fabricated and were conjugated with 1-DG or 2-DG. 1-DG provides an excellent comparison since it is known to interfere with the ability of the glucose transporter to recognize the sugar moiety. The human alveolar epithelial cancer cell line, A-549, was chosen for the in vitro cellular uptake assay. Three groups of cell samples were incubated with the 1-DG or 2-DG labeled AuNP and the unlabeled AuNP. Following the incubation, the cells were washed with sterile phosphate buffered saline to remove the excess AuNPs and spun using a centrifuge. The cell pellets were imaged using a microCT scanner immediately after the centrifugation. Internalization of AuNP-2-DG is verified using transmission electron microscopy imaging. Significant contrast enhancement in the cell samples incubated with the AuNP-2-DG with respect to the cell samples incubated with the unlabeled AuNP and the AuNP-1-DG was observed in multiple CT slices. Results from our in vitro experiments suggest that the AuNP-2-DG may be used as a functional CT contrast agent to provide high-resolution metabolic and anatomic information in a single CT scan. These results justify further in vitro and in vivo experiments to study the feasibility of using the AuNP-2-DG as a functional CT contrast agent in radiation therapy settings.
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Affiliation(s)
- Ji Li
- Department of Radiation and Cellular Oncology, The University of Chicago, Chicago, IL 60637, USA
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Krylova G, Dimitrijevic NM, Talapin DV, Guest JR, Borchert H, Lobo A, Rajh T, Shevchenko EV. Probing the Surface of Transition-Metal Nanocrystals by Chemiluminesence. J Am Chem Soc 2010; 132:9102-10. [DOI: 10.1021/ja102413k] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Galyna Krylova
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Nada M. Dimitrijevic
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Dmitri V. Talapin
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Jeffrey R. Guest
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Holger Borchert
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Arun Lobo
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
| | - Elena V. Shevchenko
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, Chemical Sciences and Engineering Division, Argonne National Laboratory, Argonne, Illinois 60439, Department of Chemistry, University of Chicago, Chicago, Illinois 60637, Energy and Semiconductor Research laboratory, Department of Physics, University of Oldenburg, Oldenburg, 26111, Germany, and HASYLAB at DESY, Hamburg, D-22607, Germany
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Lee B, Podsiadlo P, Rupich S, Talapin DV, Rajh T, Shevchenko EV. Comparison of structural behavior of nanocrystals in randomly packed films and long-range ordered superlattices by time-resolved small angle X-ray scattering. J Am Chem Soc 2010; 131:16386-8. [PMID: 19863066 DOI: 10.1021/ja906632b] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We evaluated the difference between randomly packed NCs (disordered films), periodic films, and three-dimensional crystals in terms of their lattice structure and interparticle spacing using time-resolved small-angle X-ray scattering (SAXS) technique. The work was performed on nanocrystal solids formed by 7 nm PbS nanocrystals capped with oleic acid. We have found that interparticle spacing in faceted three-dimensional crystals is approximately 25% smaller as compared with three-dimensional films formed by solvent evaporation. We showed that interparticle spacing in faceted three-dimensional crystals is significantly smaller than the length of a fully extended molecule of oleic acid, and hence, full interdigitation of molecules from neighboring particle is doubtful. Also we demonstrated that postpreparative mild thermal treatment allows further manipulation of interparticle spacing.
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Affiliation(s)
- Byeongdu Lee
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
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Kim DH, Rozhkova EA, Ulasov IV, Bader SD, Rajh T, Lesniak MS, Novosad V. Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction. Nat Mater 2010; 9:165-71. [PMID: 19946279 PMCID: PMC2810356 DOI: 10.1038/nmat2591] [Citation(s) in RCA: 272] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2009] [Accepted: 11/02/2009] [Indexed: 05/19/2023]
Abstract
Nanomagnetic materials offer exciting avenues for probing cell mechanics and activating mechanosensitive ion channels, as well as for advancing cancer therapies. Most experimental works so far have used superparamagnetic materials. This report describes a first approach based on interfacing cells with lithographically defined microdiscs that possess a spin-vortex ground state. When an alternating magnetic field is applied the microdisc vortices shift, creating an oscillation, which transmits a mechanical force to the cell. Because reduced sensitivity of cancer cells toward apoptosis leads to inappropriate cell survival and malignant progression, selective induction of apoptosis is of great importance for the anticancer therapeutic strategies. We show that the spin-vortex-mediated stimulus creates two dramatic effects: compromised integrity of the cellular membrane, and initiation of programmed cell death. A low-frequency field of a few tens of hertz applied for only ten minutes was sufficient to achieve approximately 90% cancer-cell destruction in vitro.
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Affiliation(s)
- Dong-Hyun Kim
- Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Elena A. Rozhkova
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
- ;
| | - Ilya V. Ulasov
- The Brain Tumor Center, The University of Chicago Pritzker School of Medicine, Chicago, Illinois 60637, USA
| | - Samuel D. Bader
- Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Tijana Rajh
- Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - Maciej S. Lesniak
- The Brain Tumor Center, The University of Chicago Pritzker School of Medicine, Chicago, Illinois 60637, USA
| | - Valentyn Novosad
- Materials Sciences Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
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Zhu W, Qiu X, Iancu V, Chen XQ, Pan H, Wang W, Dimitrijevic NM, Rajh T, Meyer HM, Paranthaman MP, Stocks GM, Weitering HH, Gu B, Eres G, Zhang Z. Band gap narrowing of titanium oxide semiconductors by noncompensated anion-cation codoping for enhanced visible-light photoactivity. Phys Rev Lett 2009; 103:226401. [PMID: 20366114 DOI: 10.1103/physrevlett.103.226401] [Citation(s) in RCA: 117] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2009] [Indexed: 05/29/2023]
Abstract
"Noncompensated n-p codoping" is established as an enabling concept for enhancing the visible-light photoactivity of TiO2 by narrowing its band gap. The concept embodies two crucial ingredients: the electrostatic attraction within the n-p dopant pair enhances both the thermodynamic and kinetic solubilities, and the noncompensated nature ensures the creation of tunable intermediate bands that effectively narrow the band gap. The concept is demonstrated using first-principles calculations, and is validated by direct measurements of band gap narrowing using scanning tunneling spectroscopy, dramatically redshifted optical absorbance, and enhanced photoactivity manifested by efficient electron-hole separation in the visible-light region. This concept is broadly applicable to the synthesis of other advanced functional materials that demand optimal dopant control.
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Affiliation(s)
- Wenguang Zhu
- Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
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Rozhkova EA, Ulasov I, Lai B, Dimitrijevic NM, Lesniak MS, Rajh T. A high-performance nanobio photocatalyst for targeted brain cancer therapy. Nano Lett 2009; 9:3337-42. [PMID: 19640002 PMCID: PMC4019973 DOI: 10.1021/nl901610f] [Citation(s) in RCA: 174] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We report pronounced and specific antiglioblastoma cell phototoxicity of 5 nm TiO(2) particles covalently tethered to an antibody via a dihydroxybenzene bivalent linker. The linker application enables absorption of a visible part of the solar spectrum by the nanobio hybrid. The phototoxicity is mediated by reactive oxygen species (ROS) that initiate programmed death of the cancer cell. Synchrotron X-ray fluorescence microscopy (XFM) was applied for direct visualization of the nanobioconjugate distribution through a single brain cancer cell at the submicrometer scale.
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Affiliation(s)
- Elena A Rozhkova
- The Center for Nanoscale Materials, Argonne National Laboratory, Argonne, Illinois 60439, USA.
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Abstract
One approach for making inexpensive inorganic-organic hybrid photovoltaic (PV) cells is to fill highly ordered TiO(2) nanotube (NT) arrays with solid organic hole conductors such as conjugated polymers. Here, a new in situ UV polymerization method for growing polythiophene (UV-PT) inside TiO(2) NTs is presented and compared to the conventional approach of infiltrating NTs with pre-synthesized polymer. A nanotubular TiO(2) substrate is immersed in a 2,5-diiodothiophene (DIT) monomer precursor solution and then irradiated with UV light. The selective UV photodissociation of the C--I bond produces monomer radicals with intact pi-ring structure that further produce longer oligothiophene/PT molecules. Complete photoluminescence quenching upon UV irradiation suggests coupling between radicals created from DIT and at the TiO(2) surface via a charge transfer complex. Coupling with the TiO(2) surface improves UV-PT crystallinity and pi-pi stacking; flat photocurrent values show that charge recombination during hole transport through the polymer is negligible. A non-ideal, backside-illuminated setup under illumination of 620-nm light yields a photocurrent density of approximately 5 microA cm(2)-surprisingly much stronger than with comparable devices fabricated with polymer synthesized ex situ. Since in this backside architecture setup we illuminate the cell through the Ag top electrode, there is a possibility for Ag plasmon-enhanced solar energy conversion. By using this simple in situ UV polymerization method that couples the conjugated polymer to the TiO(2) surface, the absorption of sunlight can be improved and the charge carrier mobility of the photoactive layer can be enhanced.
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Affiliation(s)
- Sanja Tepavcevic
- Department of Chemistry, The James Franck Institute, The University of Chicago, Chicago, IL 60637, USA
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Li J, Rajh T, Pelizzari C, Chmura S, Chaudhary A, Wietholt C, Redmond P, Aydogan B. WE-D-303A-02: Deoxyglucose Labeled Gold Nanoparticles as X-Ray Computed Tomography Contrast Agents for Cancer Imaging. Med Phys 2009. [DOI: 10.1118/1.3182529] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
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