1
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Okura K, Tatsumi H. Surface-dependent quenching of Qdot emission can be a new tool for high resolution measurements. Sci Rep 2023; 13:1869. [PMID: 36725912 PMCID: PMC9892493 DOI: 10.1038/s41598-023-28910-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/27/2023] [Indexed: 02/03/2023] Open
Abstract
Single quantum dots (Qdots) are often used in the field of single-molecule imaging. Qdots are sensitive to changes in the physical interactions between the Qdots and the surrounding materials. However, the spectral changes in a single Qdot emission have not been studied in detail. Low-temperature plasma treatment of glass surfaces reduced the intensity of the 655 nm emission peak of Qdot655 on glass surfaces, but did not significantly change the intensity of the 580 nm emission. Silanization of the glass surface increases the thickness of the silane layer, and the 655 nm emission peak increased. When single Qdots on the untreated glass were imaged, plasma treatment decreased the intensity of red emission and increased yellow emission. When Qdots were brought close to the glass surface in the range of 28-0 nm, the red emission intensity decreased and the yellow emission intensity increased slightly. When single actin filaments were labeled with Qdots, fluctuations of the yellow and red emission of the Qdot were detected, which reflected the very small distance changes. Our results indicate that the local interaction of Qdots with the glass surface improves the spatial and temporal resolution of optical measurements of biomolecules labeled with Qdots.
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Affiliation(s)
- Kaoru Okura
- grid.444537.50000 0001 2173 7552Department of Applied Bioscience, Kanazawa Institute of Technology (KIT), Yatsukaho 3-1, Hakusan-shi, Ishikawa 924-0838 Japan
| | - Hitoshi Tatsumi
- grid.444537.50000 0001 2173 7552Department of Applied Bioscience, Kanazawa Institute of Technology (KIT), Yatsukaho 3-1, Hakusan-shi, Ishikawa 924-0838 Japan
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2
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Lee I, Moon J, Lee H, Koh S, Kim GM, Gauthé L, Stellacci F, Huh YS, Kim P, Lee DC. Photodynamic treatment of multidrug-resistant bacterial infection using indium phosphide quantum dots. Biomater Sci 2022; 10:7149-7161. [PMID: 36367125 DOI: 10.1039/d2bm01393b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Infections caused by multidrug-resistant (MDR) bacteria pose an impending threat to humanity, as the evolution of MDR bacteria outpaces the development of effective antibiotics. In this work, we use indium phosphide (InP) quantum dots (QDs) to treat infections caused by MDR bacteria via photodynamic therapy (PDT), which shows superior bactericidal efficiency over common antibiotics. PDT in the presence of InP QDs results in high-efficiency bactericidal activity towards various bacterial species, including Staphylococcus aureus, Bacillus cereus, Escherichia coli and Pseudomonas aeruginosa. Upon light absorption, InP QDs generate superoxide (O2˙-), which leads to efficient and selective killing of MDR bacteria while mammalian cells remain intact. The cytotoxicity evaluation reveals that InP QDs are bio- and blood-compatible in a wide therapeutic window. For the in vivo study, we drop a solution of InP QDs at a concentration within the therapeutic window onto MDR S. aureus-infected skin wounds of mice and perform PDT for 15 min. InP QDs show excellent therapeutic and prophylactic efficacy in treating MDR bacterial infection. These findings show that InP QDs have great potential to serve as antibacterial agents for MDR bacterial infection treatment, as an effective and complementary alternative to conventional antibiotics.
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Affiliation(s)
- Ilsong Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. .,KAIST Institute for the Nanocentury (KINC), KAIST, Daejeon 34141, Korea.,Energy & Environmental Research Center (EERC), KAIST, Daejeon 34141, Korea
| | - Jieun Moon
- Graduate School of Nanoscience and Technology, KAIST, Daejeon 34141, Korea. .,KI for Health Science and Technology (KIHST), KAIST, Daejeon 34141, Korea
| | - Hoomin Lee
- NanoBio High-Tech Materials Research Center, Department of Biological Engineering, Inha University, Incheon 22212, Korea.
| | - Sungjun Koh
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. .,KAIST Institute for the Nanocentury (KINC), KAIST, Daejeon 34141, Korea.,Energy & Environmental Research Center (EERC), KAIST, Daejeon 34141, Korea
| | - Gui-Min Kim
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. .,KAIST Institute for the Nanocentury (KINC), KAIST, Daejeon 34141, Korea.,Energy & Environmental Research Center (EERC), KAIST, Daejeon 34141, Korea
| | - Laure Gauthé
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. .,KAIST Institute for the Nanocentury (KINC), KAIST, Daejeon 34141, Korea.,Energy & Environmental Research Center (EERC), KAIST, Daejeon 34141, Korea
| | - Francesco Stellacci
- Institute of Materials Science & Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne 1015, Switzerland
| | - Yun Suk Huh
- NanoBio High-Tech Materials Research Center, Department of Biological Engineering, Inha University, Incheon 22212, Korea.
| | - Pilhan Kim
- Graduate School of Nanoscience and Technology, KAIST, Daejeon 34141, Korea. .,KI for Health Science and Technology (KIHST), KAIST, Daejeon 34141, Korea.,Graduate School of Medical Science and Engineering, KAIST, Daejeon 34141, Korea
| | - Doh C Lee
- Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea. .,KAIST Institute for the Nanocentury (KINC), KAIST, Daejeon 34141, Korea.,Energy & Environmental Research Center (EERC), KAIST, Daejeon 34141, Korea
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3
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Choi Y, Kim D, Shin YS, Lee W, Orr S, Kim JY, Park J. Highly luminescent red-emitting In(Zn)P quantum dots using zinc oxo cluster: synthesis and application to light-emitting diodes. NANOSCALE 2022; 14:2771-2779. [PMID: 35119065 DOI: 10.1039/d1nr08038e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Despite the importance of separating nucleation steps from growth steps for the production of monodisperse highly luminescent In(Zn)P quantum dots (QDs), the practical implementation of this strategy is hindered by the high reactivity and fast depletion of conventional P precursors. This problem can be mitigated through the use of (i) Zn oxo clusters, which effectively regulate the kinetics of QD growth and prevent the fast depletion of conventional P precursors in the nucleation step, or (ii) seed-mediated continuous growth methods, which avoid secondary nucleation in the growth step and yield red-emitting InP QDs. Herein, we combine approaches (i) and (ii) to synthesize red-emitting In(Zn)P QDs with a high photoluminescence quantum yield (>93%) and a low emission bandwidth (full width at half maximum = 38 nm), revealing that our strategy hinders the carboxylate ketonization-induced generation of byproducts and suppresses the surface oxidation of In(Zn)P QDs during growth steps. The prepared In(Zn)P QDs are used to fabricate QD light-emitting diodes with a maximum brightness of 1164 cd m-2 and an external quantum efficiency of 3.61%. Thus, our results pave the way to the replacement of toxic Cd- and Pb-based QDs with more eco-friendly Zn- and In-based analogs for a variety of applications.
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Affiliation(s)
- Yonghoon Choi
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Dohoon Kim
- DUKSAN Techopia Co., Ltd, Cheonan 31217, Republic of Korea
| | - Yun Seop Shin
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Woojin Lee
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Seungjin Orr
- STMicroelectronics, Inc., 2755 Great America Way, Santa Clara, CA 95054, USA
| | - Jin Young Kim
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
| | - Jongnam Park
- School of Energy and Chemical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea.
- Department of Biomedical Engineering, Ulsan National Institute of Science and Technology (UNIST), Ulsan 44919, Republic of Korea
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4
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Chang R, Wang K, Zhang Y, Ma T, Tang J, Chen XW, Zhang B, Wang S. Tunable Performance of Quantum Dot-MoS 2 Hybrid Photodetectors via Interface Engineering. ACS APPLIED MATERIALS & INTERFACES 2021; 13:59411-59421. [PMID: 34851094 DOI: 10.1021/acsami.1c10888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Heterostructures of quantum dots (QDs) and two-dimensional (2D) materials show promising potential for photodetection applications owing to their combination of high optical absorption and good in-plane carrier mobility. In this work, the performance of QD-2D photodetectors is tuned by band engineering. Devices are fabricated by coating MoS2 nanosheets with InP QDs, type-I core-shell InP/ZnS QDs, and type-II core-shell InP/CdS QDs. Comparative spectroscopic and photoelectric studies of different hybrids show that the energy band alignment and shell thickness can influence the efficiency of charge transfer (CT), energy transfer (ET), and defect-related processes between QDs and MoS2. Benefiting from efficient CT between the QDs and MoS2, a significant enhancement of responsivity and detectivity is observed in thick-shell InP/CdS QD-MoS2 devices. Our results demonstrate the feasibility of using core-shell QDs for regulating the ET and CT efficiency in heterostructures and highlight the importance of interface band design in QD-2D and other low-dimensional photodetectors.
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Affiliation(s)
- Ruiheng Chang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Kexin Wang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Youwei Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Tianzi Ma
- School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Jianwei Tang
- School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Xue-Wen Chen
- School of Physics and Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Butian Zhang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Shun Wang
- MOE Key Laboratory of Fundamental Physical Quantities Measurement & Hubei Key Laboratory of Gravitation and Quantum Physics, PGMF and School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China
- Shenzhen Huazhong University of Science and Technology Research Institute, Shenzhen 518057, China
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5
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Park N, Eagle FW, DeLarme AJ, Monahan M, LoCurto T, Beck R, Li X, Cossairt BM. Tuning the interfacial stoichiometry of InP core and InP/ZnSe core/shell quantum dots. J Chem Phys 2021; 155:084701. [PMID: 34470352 DOI: 10.1063/5.0060462] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
We demonstrate fine-tuning of the atomic composition of InP/ZnSe quantum dots (QDs) at the core/shell interface. Specifically, we control the stoichiometry of both anions (P, As, S, and Se) and cations (In and Zn) at the InP/ZnSe core/shell interface and correlate these changes with the resultant steady-state and time-resolved optical properties of the nanocrystals. The use of reactive trimethylsilyl reagents results in surface-limited reactions that shift the nanocrystal stoichiometry to anion-rich and improve epitaxial growth of the shell layer. In general, anion deposition on the InP QD surface results in a redshift in the absorption, quenching of the excitonic photoluminescence, and a relative increase in the intensity of broad trap-based photoluminescence, consistent with delocalization of the exciton wavefunction and relaxation of exciton confinement. Time-resolved photoluminescence data for the resulting InP/ZnSe QDs show an overall small change in the decay dynamics on the ns timescale, suggesting that the relatively low photoluminescence quantum yields may be attributed to the creation of new thermally activated charge trap states and likely a dark population that is inseparable from the emissive QDs. Cluster-model density functional theory calculations show that the presence of core/shell interface anions gives rise to electronic defects contributing to the redshift in the absorption. These results highlight a general strategy to atomistically tune the interfacial stoichiometry of InP QDs using surface-limited reaction chemistry allowing for precise correlations with the electronic structure and photophysical properties.
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Affiliation(s)
- Nayon Park
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Forrest W Eagle
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Asher J DeLarme
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Madison Monahan
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Talia LoCurto
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Ryan Beck
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Xiaosong Li
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
| | - Brandi M Cossairt
- Department of Chemistry, University of Washington, Seattle, Washington, 98195-1700, USA
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6
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Saeboe AM, Nikiforov AY, Toufanian R, Kays JC, Chern M, Casas JP, Han K, Piryatinski A, Jones D, Dennis AM. Extending the Near-Infrared Emission Range of Indium Phosphide Quantum Dots for Multiplexed In Vivo Imaging. NANO LETTERS 2021; 21:3271-3279. [PMID: 33755481 PMCID: PMC8243857 DOI: 10.1021/acs.nanolett.1c00600] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
This report of the reddest emitting indium phosphide quantum dots (InP QDs) to date demonstrates tunable, near-infrared (NIR) photoluminescence (PL) as well as PL multiplexing in the first optical tissue window while avoiding toxic constituents. This synthesis overcomes the InP "growth bottleneck" and extends the emission peak of InP QDs deeper into the first optical tissue window using an inverted QD heterostructure, specifically ZnSe/InP/ZnS core/shell/shell nanoparticles. The QDs exhibit InP shell thickness-dependent tunable emission with peaks ranging from 515-845 nm. The high absorptivity of InP yields effective photoexcitation of the QDs with UV, visible, and NIR wavelengths. These nanoparticles extend the range of tunable direct-bandgap emission from InP-based nanostructures, effectively overcoming a synthetic barrier that has prevented InP-based QDs from reaching their full potential as NIR imaging agents. Multiplexed lymph node imaging in a mouse model demonstrates the potential of the NIR-emitting InP particles for in vivo imaging.
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Affiliation(s)
- Alexander M. Saeboe
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | | | - Reyhaneh Toufanian
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Joshua C. Kays
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Margaret Chern
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - J. Paolo Casas
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Keyi Han
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Andrei Piryatinski
- Theoretical Division and Center for Non-linear Studies, Los Alamos National Laboratory, Los Alamos, NM 87544, USA
| | - Dennis Jones
- School of Medicine, Boston University, Boston, MA, 02118
| | - Allison M. Dennis
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
- Photonics Center, Boston University, Boston, MA 02215, USA
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
- corresponding author: Allison M. Dennis,
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7
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Toufanian R, Chern M, Kong VH, Dennis AM. Engineering Brightness Matched Indium Phosphide Quantum Dots. CHEMISTRY OF MATERIALS : A PUBLICATION OF THE AMERICAN CHEMICAL SOCIETY 2021; 33:1964-1975. [PMID: 34219920 PMCID: PMC8243842 DOI: 10.1021/acs.chemmater.0c03181] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The size-dependent optoelectronic properties of semiconductor nanocrystals quantum dots (QDs) are hugely beneficial for color tunability but induce an inherent relative PL brightness mismatch in QDs emitting different colors, as larger emitters absorb more incident photons than smaller particles. Here, we examine the effect of core composition, shell composition, and shell thickness on optical properties including high energy absorption, quantum yield (QY), and the relative brightness of InP/ZnS and InP/ZnSe core/shell and InP/ZnSe/ZnS core/shell/shell QDs at different excitation wavelengths. Our analysis reveals that the presence of an intermediate ZnSe shell changes the wavelength of enhanced absorption onset and leads to highly excitation wavelength dependent QYs. Switching from commercial CdSe/ZnS to InP/ZnS reduces the brightness-mismatch between green and red emitters from 33- to 5-fold. Incorporating a 4-monolayer thick optically absorbing ZnSe shell into the QD heterostructure and heating the QDs in a solution of zinc oleate and trioctylphosphine produces InP/ZnSe/ZnS QDs that are ~10-fold brighter than their InP/ZnS counterparts. In contrast to CdSe/CdS/ZnS core/shell/shell QDs, which only photoluminesce at red wavelengths with thicker CdS shells due to their Quasi-Type II bandstructure, Type I InP/ZnSe/ZnS QDs are uniquely suited to creating a rainbow of visible-emitting, brightness matched emitters. By tailoring the thickness of the intermediate ZnSe shell, heavy metal-free, brightness-matched green and red emitters are produced. This study highlights the ability to overcome the inherent brightness mismatch seen in QDs through concerted materials design of heterostructured core/shell InP-based QDs.
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Affiliation(s)
- Reyhaneh Toufanian
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Margaret Chern
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
| | - Victoria H Kong
- Department of Biomedical Engineering, Boston University, Boston, MA 02215, USA
| | - Allison M Dennis
- Division of Materials Science and Engineering, Boston University, Boston, MA 02215, USA
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8
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Lignos I, Mo Y, Carayannopoulos L, Ginterseder M, Bawendi MG, Jensen KF. A high-temperature continuous stirred-tank reactor cascade for the multistep synthesis of InP/ZnS quantum dots. REACT CHEM ENG 2021. [DOI: 10.1039/d0re00454e] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Multistep and continuous production of core–shell InP/ZnS semiconductor nanocrystals in a high-temperature and miniature continuous stirred-tank reactor cascade.
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Affiliation(s)
- Ioannis Lignos
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- U.S.A
| | - Yiming Mo
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- U.S.A
| | | | | | - Moungi G. Bawendi
- Department of Chemistry
- Massachusetts Institute of Technology
- Cambridge
- U.S.A
| | - Klavs F. Jensen
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- U.S.A
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9
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MUC-1 aptamer conjugated InP/ZnS quantum dots/nanohydrogel fluorescent composite for mitochondria-mediated apoptosis in MCF-7 cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 118:111469. [PMID: 33255050 DOI: 10.1016/j.msec.2020.111469] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 07/18/2020] [Accepted: 08/26/2020] [Indexed: 12/13/2022]
Abstract
The combined use of nanohydrogels (NHGs) and quantum dots (QDs) has resulted in the development of a nanoscaled drug delivery system (DDS) with fluorescence imaging potential. NHG-QDs composite loaded with anti-cancer drugs could be applied as an effective theranostics for simultaneous diagnosis and therapy of cancer cells. Here, we report on the synthesis of NHG-QDs nanosystem (NS) conjugated with an amino-modified MUC-1 aptamer (Ap) and loaded with hydrophobic paclitaxel (PTX). To effectively target and eradicate breast cancer MCF-7 cells, the nanocomposite was further loaded with the inhibitor of lactate dehydrogenase (LDH), sodium oxamate (SO) (Ap-NHG-QDs-PTX-SO) to inhibit the conversion of pyruvate to lactate via LDH and disrupting glycolysis. Results obtained from in vitro analysis (MTT assay, apoptosis/necrosis assessment, evaluation of mitochondria targeting, and gene expression profiling) revealed that Ap-NHG-QDs-PTX-SO NS could significantly target and inhibit MCF-7 cells and also induce mitochondria-mediated apoptosis. Collectively, the Ap-NHG-QDs-PTX-SO NS is proposed to serve as a robust theranostics for simultaneous imaging and therapy of breast cancer and other types of solid tumors.
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10
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Chern M, Toufanian R, Dennis AM. Quantum dot to quantum dot Förster resonance energy transfer: engineering materials for visual color change sensing. Analyst 2020; 145:5754-5767. [PMID: 32715305 PMCID: PMC8275315 DOI: 10.1039/d0an00746c] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
In this work, quantum dots (QDs) of various heterostructured compositions and shell thicknesses are used as Förster or fluorescence resonance energy transfer (FRET) donors and acceptors to optimize QD-QD FRET sensing through materials design. While several reports have highlighted the advantages of using QD-dye, rather than dye-dye, FRET in sensing applications, QD-QD FRET has lagged behind in development as a result of high background signal from direct acceptor excitation. However, in designing sensors for longitudinal studies, QD-dye sensors are limited by the photostability of the fluorescent dye. While fluorescence generally affords higher sensitivity than absorbance-based readouts, the instrumentation needed for detecting fluorescence can be expensive, motivating the development of sensors bright enough to be seen by eye or imaged with cheap consumer electronics. Harnessing the exceptional brightness of QDs, our study focuses on the development of QD-QD FRET pairs where color change is achieved for visual readout and instrument-free sensing. We demonstrate that bulk semiconductor material characteristics can be used to a priori predict and tailor the behavior of QD-QD FRET systems, and our findings show that it is possible to create QD donors that are brighter than their acceptors through concerted compositional and morphological choices in heterostructured QDs. This is significant for developing visual sensors, as we show that the most profound color change occurs when the direct acceptor emission is lower than that of the donor. Finally, the use of an optimal cadmium-free QD-QD FRET pair is presented in a pH sensor that shows a large range of pH-dependent color change with bright, instrument-free readout.
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Affiliation(s)
- Margaret Chern
- Materials Science and Engineering, Boston University, Boston, MA, 02215 USA.
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11
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Do KH, Kumar DP, Rangappa AP, Hong Y, Reddy DA, Kim TK. Indium Phosphide Quantum Dots Integrated with Cadmium Sulfide Nanorods for Photocatalytic Carbon Dioxide Reduction. ChemCatChem 2020. [DOI: 10.1002/cctc.202000616] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Khai H. Do
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - D. Praveen Kumar
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - A. Putta Rangappa
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | - Yul Hong
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
| | | | - Tae Kyu Kim
- Department of Chemistry Yonsei University Seoul 03722 Republic of Korea
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12
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Freymeyer NJ, Click SM, Reid KR, Chisholm MF, Bradsher CE, McBride JR, Rosenthal SJ. Effect of indium alloying on the charge carrier dynamics of thick-shell InP/ZnSe quantum dots. J Chem Phys 2020; 152:161104. [PMID: 32357779 DOI: 10.1063/1.5145189] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Thick-shell InP/ZnSe III-V/II-VI quantum dots (QDs) were synthesized with two distinct interfaces between the InP core and ZnSe shell: alloy and core/shell. Despite sharing similar optical properties in the spectral domain, these two QD systems have differing amounts of indium incorporation in the shell as determined by high-resolution energy-dispersive x-ray spectroscopy scanning transmission electron microscopy. Ultrafast fluorescence upconversion spectroscopy was used to probe the charge carrier dynamics of these two systems and shows substantial charge carrier trapping in both systems that prevents radiative recombination and reduces the photoluminescence quantum yield. The alloy and core/shell QDs show slight differences in the extent of charge carrier localization with more extensive trapping observed in the alloy nanocrystals. Despite the ability to grow a thick shell, structural defects caused by III-V/II-VI charge carrier imbalances still need to be mitigated to further improve InP QDs.
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Affiliation(s)
| | - Sophia M Click
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Kemar R Reid
- Vanderbilt Institute of Nanoscale Science and Engineering, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Matthew F Chisholm
- Material Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830, USA
| | - Cara E Bradsher
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - James R McBride
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
| | - Sandra J Rosenthal
- Department of Chemistry, Vanderbilt University, Nashville, Tennessee 37235, USA
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13
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Vyshnava SS, Pandluru G, Kanderi DK, Panjala SP, Banapuram S, Paramasivam K, Anupalli RR, Bontha RR, Dowlatabad MR. Gram scale synthesis of QD450 core–shell quantum dots for cellular imaging and sorting. APPLIED NANOSCIENCE 2020. [DOI: 10.1007/s13204-020-01261-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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14
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Semiconductor quantum dot FRET: Untangling energy transfer mechanisms in bioanalytical assays. Trends Analyt Chem 2020. [DOI: 10.1016/j.trac.2019.115750] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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15
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Grazon C, Chern M, Ward K, Lecommandoux S, Grinstaff MW, Dennis AM. A versatile and accessible polymer coating for functionalizable zwitterionic quantum dots with high DNA grafting efficiency. Chem Commun (Camb) 2019; 55:11067-11070. [PMID: 31453992 DOI: 10.1039/c9cc04856a] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Efficient and versatile functionalization of poly(anhydride maleic-alt-isobutylene) (PIMA), with economical commercial reagents, results in the one-step/one-day production of a copper-free click chemistry-ready carboxybetaine-like coating for quantum dots (QDs). The QDs are bright and stable in aqueous media and easily grafted with DNA with >95% efficiency.
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Affiliation(s)
- Chloé Grazon
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, UMR 5629, F-33600, Pessac, France and Department of Chemistry, Boston University, Boston, MA, USA
| | - Margaret Chern
- Division of Materials Science & Engineering, Boston University, Boston, MA, USA.
| | - Katherine Ward
- Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | | | - Mark W Grinstaff
- Department of Chemistry, Boston University, Boston, MA, USA and Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | - Allison M Dennis
- Division of Materials Science & Engineering, Boston University, Boston, MA, USA. and Department of Biomedical Engineering, Boston University, Boston, MA, USA
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Wegner KD, Dussert F, Truffier-Boutry D, Benayad A, Beal D, Mattera L, Ling WL, Carrière M, Reiss P. Influence of the Core/Shell Structure of Indium Phosphide Based Quantum Dots on Their Photostability and Cytotoxicity. Front Chem 2019; 7:466. [PMID: 31316974 PMCID: PMC6610543 DOI: 10.3389/fchem.2019.00466] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Accepted: 06/12/2019] [Indexed: 11/29/2022] Open
Abstract
With the goal to improve their photostability, InP-based QDs are passivated with three types of inorganic shells, namely (i) a gradient ZnSexS1−x shell, (ii) an additional ZnS shell on top of the gradient shell with two different thicknesses (core/shell/shell, CSS), (iii) an alumina coating on top of ZnS. All three systems have photoluminescence quantum yields (PLQY) > 50% and similar PL decay times (64–67 ns). To assess their photostability they are incorporated into a transparent poly (methyl methacrylate) (PMMA) matrix and exposed to continuous irradiation with simulated sunlight in a climate chamber. The alumina coated core/shell system exhibits the highest stability in terms of PLQY retention as well as the lowest shift of the PL maximum and lowest increase of the PL linewidth, followed by the CSS QDs and finally the gradient shell system. By means of XPS studies we identify the degradation of the ZnS outer layer and concomitant oxidation of the emissive InZnP core as the main origins of degradation in the gradient structure. These modifications do not occur in the case of the alumina-capped sample, which exhibits excellent chemical stability. The gradient shell and CSS systems could be transferred to the aqueous phase using surface ligand exchange with penicillamine. Cytotoxicity studies on human primary keratinocytes revealed that exposure for 24 h to 6.25–100 nM of QDs did not affect cell viability. However, a trend toward reduced cell proliferation is observed for higher concentrations of gradient shell and CSS QDs with a thin ZnS shell, while CSS QDs with a thicker ZnS shell do not exhibit any impact.
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Affiliation(s)
- Karl David Wegner
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, STEP, Grenoble, France
| | - Fanny Dussert
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, CIBEST, Grenoble, France
| | | | - Anass Benayad
- Univ. Grenoble Alpes, CEA-LITEN L2N, Grenoble, France
| | - David Beal
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, CIBEST, Grenoble, France
| | - Lucia Mattera
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, STEP, Grenoble, France
| | - Wai Li Ling
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, IBS, Grenoble, France
| | - Marie Carrière
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, CIBEST, Grenoble, France
| | - Peter Reiss
- Univ. Grenoble Alpes, CEA, CNRS, IRIG, SyMMES, STEP, Grenoble, France
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