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Chen GH, Chen PH, Lin CT, Jang TW, Yang P, Chen HS. Enhanced Photostability of Core/Shell Quantum Dots under Intense Blue Light Irradiation through Positive Photoaging Mechanism. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37927092 DOI: 10.1021/acsami.3c13236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2023]
Abstract
Photostability of semiconductor core/shell quantum dots (QDs) has historically been perceived as intricate and unpredictable. Notably, the long-term luminescence stability of QDs under light exposure does not seem to consistently correspond with their characteristics in the absence of light. In this study, we propose a positive photoaging mechanism of QDs, integrating both ligand/shell-induced photobrightening and surface photo-oxidation, to deal with the photostability nuances. When QDs are subjected to higher energy light, their photobrightening and photodarkening conjointly determine the photostability. Enhanced photostability may not be simply attributed to a thicker shell or the presence of ligands. When adjusted with an optimal shell thickness and supplemented with negatively charged ligands, QDs exhibit enhanced photostability in both solvents and polymers.
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Affiliation(s)
- Guan-Hong Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Po-Hsun Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Chen-Te Lin
- Ph.D. Program in Prospective Functional Materials Industry, College of Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Tyng-Woei Jang
- Ph.D. Program in Prospective Functional Materials Industry, College of Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
| | - Ping Yang
- School of Material Science and Engineering, University of Jinan, Jinan 250022, P. R. China
| | - Hsueh-Shih Chen
- Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 30013, Taiwan
- College of Semiconductor Research, National Tsing Hua University, Hsinchu 30013, Taiwan
- Department of Chemical Engineering & Materials Science, College of Engineering, Yuan Ze University, Taoyuan 32003, Taiwan
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Li JB, Tan XL, Ma JH, Xu SQ, Kuang ZW, Liang S, Xiao S, He MD, Kim NC, Luo JH, Chen LQ. Plasmon-modulated bistable four-wave mixing signals from a metal nanoparticle-monolayer MoS 2 nanoresonator hybrid system. NANOTECHNOLOGY 2018; 29:255704. [PMID: 29620534 DOI: 10.1088/1361-6528/aabbdc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We present a study for the impact of exciton-phonon and exciton-plasmon interactions on bistable four-wave mixing (FWM) signals in a metal nanoparticle (MNP)-monolayer MoS2 nanoresonator hybrid system. Via tracing the FWM response we predict that, depending on the excitation conditions and the system parameters, such a system exhibits 'U-shaped' bistable FWM signals. We also map out bistability phase diagrams within the system's parameter space. Especially, we show that compared with the exciton-phonon interaction, a strong exciton-plasmon interaction plays a dominant role in the generation of optical bistability, and the bistable region will be greatly broadened by shortening the distance between the MNP and the monolayer MoS2 nanoresonator. In the weak exciton-plasmon coupling regime, the impact of exciton-phonon interaction on optical bistability will become obvious. The scheme proposed may be used for building optical switches and logic-gate devices for optical computing and quantum information processing.
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Affiliation(s)
- Jian-Bo Li
- Institute of Mathematics and Physics, Central South University of Forestry and Technology, Changsha 410004, People's Republic of China
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Kurochkina M, Konshina E, Oseev A, Hirsch S. Hybrid structures based on gold nanoparticles and semiconductor quantum dots for biosensor applications. Nanotechnol Sci Appl 2018; 11:15-21. [PMID: 29731613 PMCID: PMC5927191 DOI: 10.2147/nsa.s155045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background The luminescence amplification of semiconductor quantum dots (QD) in the presence of self-assembled gold nanoparticles (Au NPs) is one of way for creating biosensors with highly efficient transduction. Aims The objective of this study was to fabricate the hybrid structures based on semiconductor CdSe/ZnS QDs and Au NP arrays and to use them as biosensors of protein. Methods In this paper, the hybrid structures based on CdSe/ZnS QDs and Au NP arrays were fabricated using spin coating processes. Au NP arrays deposited on a glass wafer were investigated by optical microscopy and absorption spectroscopy depending on numbers of spin coating layers and their baking temperature. Bovine serum albumin (BSA) was used as the target protein analyte in a phosphate buffer. A confocal laser scanning microscope was used to study the luminescent properties of Au NP/QD hybrid structures and to test BSA. Results The dimensions of Au NP aggregates increased and the space between them decreased with increasing processing temperature. At the same time, a blue shift of the plasmon resonance peak in the absorption spectra of Au NP arrays was observed. The deposition of CdSe/ZnS QDs with a core diameter of 5 nm on the surface of the Au NP arrays caused an increase in absorption and a red shift of the plasmon peak in the spectra. The exciton–plasmon enhancement of the QDs’ photoluminescence intensity has been obtained at room temperature for hybrid structures with Au NPs array pretreated at temperatures of 100°C and 150°C. It has been found that an increase in the weight content of BSA increases the photoluminescence intensity of such hybrid structures. Conclusion The ability of the qualitative and quantitative determination of protein content in solution using the Au NP/QD structures as an optical biosensor has been shown experimentally.
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Affiliation(s)
- Margarita Kurochkina
- Centre of Information Optical Technologies, ITMO University, Saint Petersburg, Russia
| | - Elena Konshina
- Centre of Information Optical Technologies, ITMO University, Saint Petersburg, Russia
| | - Aleksandr Oseev
- Institute of Micro and Sensor Systems, Ottovon-Guericke-University Magdeburg, Magdeburg, Germany
| | - Soeren Hirsch
- Department of Engineering, University of Applied Sciences Brandenburg, Brandenburg an der Havel, Germany
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She X, Li J, Yan JY. The Berry phase in the nanocrystal complex composed of metal nanoparticle and semiconductor quantum dot. OPTICS EXPRESS 2017; 25:22869-22879. [PMID: 29041593 DOI: 10.1364/oe.25.022869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2017] [Accepted: 08/31/2017] [Indexed: 06/07/2023]
Abstract
We investigate the Berry phase in the nanocrystal complex made of a metal nanoparticle and a slowly rotating semiconductor quantum dot under the radiation of a circularly polarized light. The Berry phase in the dynamic system is found to be more effective to manifest the interaction between the plasmon in the metal nanoparticle and the exciton in the quantum dot. The dependences of the Berry phase on the interparticle distance and the relative position are studied in the weak field condition. The methods to observe the Berry phase are also given.
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Wing WJ, Sadeghi SM, Gutha RR. Ultrafast emission decay with high emission efficiency of quantum dots in plasmonic-dielectric metasubstrates. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2017; 29:295301. [PMID: 28604367 DOI: 10.1088/1361-648x/aa74ff] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
We report on the ultrafast decay of quantum dots that reaches nearly 430 ps without reduction in the emission intensity when near a metasubstrate of simple geometry. By implementing a layered structure of amorphous silicon sandwiched between two gold layers, the balance between plasmonic near field enhancement and energy transfer of the quantum dots has been shifted. This is achieved by tailoring the amount of Förster resonance energy transfer (FRET) to the top Au layer and plasmonic near field enhancement by the bottom Au layer. We also study the impact of deposition of Al oxide on the top Au layer, forming a charge barrier junction that can suppress Auger recombination of quantum dots. The results show that such a barrier can increase emission efficiency of the metastructure without significant reduction in the decay rate. We study the impact of formation of small nanoislands to contiguous islands via variation of the thickness of the top Au layer, and discuss how such morphologies determine the amount of FRET, screening of plasmonic field from the bottom Au layer, and enhancement of emission due to their own plasmonic fields.
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Affiliation(s)
- Waylin J Wing
- Department of Physics, University of Alabama in Huntsville, Huntsville, AL 35899, United States of America
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Kuo PC, Chen GY, Chen YN. Scattering of nanowire surface plasmons coupled to quantum dots with azimuthal angle difference. Sci Rep 2016; 6:37766. [PMID: 27892942 PMCID: PMC5125278 DOI: 10.1038/srep37766] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/01/2016] [Indexed: 11/25/2022] Open
Abstract
Coherent scatterings of surface plasmons coupled to quantun dots have attracted great attention in plasmonics. Recently, an experiment has shown that the quantum dots located nearby a nanowire can be separated not only in distance, but also an angle ϕ along the cylindrical direction. Here, by using the real-space Hamiltonian and the transfer matrix method, we analytically obtain the transmission/reflection spectra of nanowire surface plasmons coupled to quantum dots with an azimuthal angle difference. We find that the scattering spectra can show completely different features due to different positions and azimuthal angles of the quantum dots. When additionally coupling a cavity to the dots, we obtain the Fano-like line shape in the transmission and reflection spectra due to the interference between the localized and delocalized modes.
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Affiliation(s)
- Po-Chen Kuo
- Department of Physics, National Cheng-Kung University, Tainan 701, Taiwan
| | - Guang-Yin Chen
- Department of Physics, National Chung Hsing University, Taichung 402, Taiwan
| | - Yueh-Nan Chen
- Department of Physics, National Cheng-Kung University, Tainan 701, Taiwan.,Physics Division, National Center for Theoretical Sciences, Hsinchu, Taiwan
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Brichkin SB, Spirin MG, Razumov VF. Influence of gold nanoparticles on nonradiative energy transfer in nanoclusters of colloidal quantum dots InP@ZnS. HIGH ENERGY CHEMISTRY 2016. [DOI: 10.1134/s0018143916060047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Hou X, Zeng F, Du F, Wu S. Carbon-dot-based fluorescent turn-on sensor for selectively detecting sulfide anions in totally aqueous media and imaging inside live cells. NANOTECHNOLOGY 2013; 24:335502. [PMID: 23892368 DOI: 10.1088/0957-4484/24/33/335502] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Sulfide anions are generated not only as a byproduct from industrial processes but also in biosystems. Hence, robust fluorescent sensors for detecting sulfide anions which are fast-responding, water soluble and biocompatible are highly desirable. Herein, we report a carbon-dot-based fluorescent sensor, which features excellent water solubility, low cytotoxicity and a short response time. This sensor is based on the ligand/Cu(II) approach so as to achieve fast sensing of sulfide anions. The carbon dot (CD) serves as the fluorophore as well as the anchoring site for the ligands which bind with copper ions. For this CD-based system, as copper ions bind with the ligands which reside on the surface of the CD, the paramagnetic copper ions efficiently quench the fluorescence of the CD, affording the system a turn-off sensor for copper ions. More importantly, the subsequently added sulfide anions can extract Cu(2+) from the system and form very stable CuS with Cu(2+), resulting in fluorescence enhancement and affording the system a turn-on sensor for sulfide anions. This fast-responding and selective sensor can operate in totally aqueous solution or in physiological milieu with a low detection limit of 0.78 μM. It displays good biocompatibility, and excellent cell membrane permeability, and can be used to monitor S(2-) levels in running water and living cells.
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Affiliation(s)
- Xianfeng Hou
- College of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, People's Republic of China
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Batabyal S, Mondol T, Das K, Pal SK. Förster resonance energy transfer in a nanoscopic system on a dielectric interface. NANOTECHNOLOGY 2012; 23:495402. [PMID: 23150145 DOI: 10.1088/0957-4484/23/49/495402] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
We investigate picosecond-resolved energy transfer between a quantum dot (donor) and an organic molecule (acceptor) in the proximity of a reflecting metallic/non-metallic surface. We demonstrate experimentally that the Förster resonance energy transfer (FRET) is significantly influenced by the proximity of the mirror. Locating a cadmium selenide quantum dot (donor: D) attached to an organic dye merocyanine (acceptor: A) at well-defined positions from the reflecting silver/silicon surface allows the transfer rate to be determined as a function of distance from the surface. An attempt to fit the experimental data to a model relying upon the change of the apparent energy transfer rate due to interference of direct and reflected light waves reveals reasonably good results. The results show that the observed FRET rate in a D-A pair on the mirror surface is oscillating in nature, providing information for the measured energy transfer, which could be potentially different from that of the actual transfer due to optical interference.
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Affiliation(s)
- Subrata Batabyal
- Unit for Nano-science and Technology, S N Bose National Centre for Basic Sciences, Salt Lake, Kolkata, India
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Haldar KK, Sen T, Mandal S, Patra A. Photophysical Properties of Au-CdTe Hybrid Nanostructures of Varying Sizes and Shapes. Chemphyschem 2012; 13:3989-96. [DOI: 10.1002/cphc.201200446] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2012] [Indexed: 11/06/2022]
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