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Luo CL, Yang RX, Yan WG, Chen CM, Liu SY, Zhao SJ, Ge WQ, Liu ZF, Jia GZ. Surface Plasmon-Enhanced Luminescence of CdSe/CdS Quantum Dots Film Based on Au Nanoshell Arrays. MATERIALS 2019; 12:ma12030362. [PMID: 30682779 PMCID: PMC6384793 DOI: 10.3390/ma12030362] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/18/2019] [Accepted: 01/21/2019] [Indexed: 01/13/2023]
Abstract
In this paper, Au nanoshell arrays, serving as a photo-activated material, are fabricated via the combination of self-assembled nanosphere lithography and the thermal decomposing polymer method. The intensity and position of surface plasmonic resonance can be tuned from the visible region to the near-infrared region by changing the size of Au nanoshell arrays. When resonance absorption peaks of metal nanoparticles are matched with emission wavelengths of core-shell CdSe/CdS quantum dots, fluorescent intensity of CdSe/CdS quantum dots can be strongly enhanced. The physical mechanism of fluorescent enhancement is explained.
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Affiliation(s)
- Chun-Li Luo
- School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300400, China.
- School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China.
| | - Rui-Xia Yang
- School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300400, China.
| | - Wei-Guo Yan
- School of Science, Tianjin Chengjian University, Tianjin 300384, China.
| | - Chun-Mei Chen
- School of Electronic and Information Engineering, Hebei University of Technology, Tianjin 300400, China.
| | - Shu-Yu Liu
- School of Science, Tianjin Chengjian University, Tianjin 300384, China.
| | - Shi-Jin Zhao
- School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China.
| | - Wen-Qi Ge
- School of Control and Mechanical Engineering, Tianjin Chengjian University, Tianjin 300384, China.
| | - Zhi-Feng Liu
- School of Materials Science and Engineering, Tianjin Chengjian University, Tianjin 300384, China.
| | - Guo-Zhi Jia
- School of Science, Tianjin Chengjian University, Tianjin 300384, China.
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Chen J, Yang B, Li C, Zheng K, Žídek K, Pullerits T. Photostability of the Oleic Acid-Encapsulated Water-Soluble Cd x Se y Zn 1-x S 1-y Gradient Core-Shell Quantum Dots. ACS OMEGA 2017; 2:1922-1929. [PMID: 31457551 PMCID: PMC6640918 DOI: 10.1021/acsomega.7b00316] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 04/27/2017] [Indexed: 05/02/2023]
Abstract
Composite systems where quantum dots (QDs) are combined with other nanomaterials (e.g., gold nanorods) in aqueous solutions have attracted broad attention-both for their potential in applications and for studies of fundamental processes. However, high-quality QDs are typically prepared in organic solvents, and the transfer of QDs to an aqueous phase is needed to create the desired QD composites. Photostability of the transferred QDs-both the steady-state and photo-induced dynamic properties-is essential for studying the processes in the composites and for their applications. We present a detailed study of the photostability of aqueous Cd x Se y Zn1-x S1-y gradient core-shell QDs obtained by various approaches using linker exchange and surfactant encapsulation. Beside the steady-state photoluminescence (PL) emission stability, we also study changes in the PL decay. From the variety of the studied samples, the water-soluble QDs encapsulated by a double layer of oleic acid show superior properties, that is, stable PL emission and PL decay under continuous light or pulsed-laser light irradiation. We demonstrate that the double-layer encapsulation of QDs can be used to create QDs-metal nanoparticle composites.
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Affiliation(s)
- Junsheng Chen
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China
| | - Bin Yang
- State
Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 116023 Dalian, China
| | - Chuanshuai Li
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
| | - Kaibo Zheng
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Gas
Processing Center, College of Engineering, Qatar University, P.O. Box 2713, Doha, Qatar
| | - Karel Žídek
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- Regional
Centre for Special Optics and Optoelectronic Systems (TOPTEC), Institute
of Plasma Physics, Academy of Sciences of
the Czech Republic, Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic
- E-mail: (K.Ž.)
| | - Tõnu Pullerits
- Department
of Chemical Physics and NanoLund, Chemical Center, Lund University, P.O. Box 124, 22100 Lund, Sweden
- E-mail: (T.P.)
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3
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Chen J, Žídek K, Chábera P, Liu D, Cheng P, Nuuttila L, Al-Marri MJ, Lehtivuori H, Messing ME, Han K, Zheng K, Pullerits T. Size- and Wavelength-Dependent Two-Photon Absorption Cross-Section of CsPbBr 3 Perovskite Quantum Dots. J Phys Chem Lett 2017; 8:2316-2321. [PMID: 28480702 DOI: 10.1021/acs.jpclett.7b00613] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
All-inorganic colloidal perovskite quantum dots (QDs) based on cesium, lead, and halide have recently emerged as promising light emitting materials. CsPbBr3 QDs have also been demonstrated as stable two-photon-pumped lasing medium. However, the reported two photon absorption (TPA) cross sections for these QDs differ by an order of magnitude. Here we present an in-depth study of the TPA properties of CsPbBr3 QDs with mean size ranging from 4.6 to 11.4 nm. By using femtosecond transient absorption (TA) spectroscopy we found that TPA cross section is proportional to the linear one photon absorption. The TPA cross section follows a power law dependence on QDs size with exponent 3.3 ± 0.2. The empirically obtained power-law dependence suggests that the TPA process through a virtual state populates exciton band states. The revealed power-law dependence and the understanding of TPA process are important for developing high performance nonlinear optical devices based on CsPbBr3 nanocrystals.
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Affiliation(s)
- Junsheng Chen
- Department of Chemical Physics and NanoLund, Lund University , P.O. Box 124, 22100 Lund, Sweden
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, 116023, China
| | - Karel Žídek
- Department of Chemical Physics and NanoLund, Lund University , P.O. Box 124, 22100 Lund, Sweden
- Regional Centre for Special Optics and Optoelectronic Systems (TOPTEC), Institute of Plasma Physics, Academy of Sciences of the Czech Republic , Za Slovankou 1782/3, 182 00 Prague 8, Czech Republic
| | - Pavel Chábera
- Department of Chemical Physics and NanoLund, Lund University , P.O. Box 124, 22100 Lund, Sweden
| | - Dongzhou Liu
- College of Science, Agricultural University of Hebei , Lingyusi 289, 071001, Baoding, Hebei China
- College of Physics Science & Technology, Hebei University , East of Wusi 180, 071002, Baoding, Hebei China
| | - Pengfei Cheng
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, 116023, China
| | - Lauri Nuuttila
- University of Jyväskylä , Department of Physics, Nanoscience Center, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Mohammed J Al-Marri
- Gas Processing Center, College of Engineering, Qatar University , P.O. Box 2713, Doha, Qatar
| | - Heli Lehtivuori
- University of Jyväskylä , Department of Physics, Nanoscience Center, P.O. Box 35, 40014 Jyväskylä, Finland
| | - Maria E Messing
- Solid State Physics and NanoLund, Lund University , Box 118, 22100 Lund, Sweden
| | - Keli Han
- State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian, 116023, China
| | - Kaibo Zheng
- Department of Chemical Physics and NanoLund, Lund University , P.O. Box 124, 22100 Lund, Sweden
- Gas Processing Center, College of Engineering, Qatar University , P.O. Box 2713, Doha, Qatar
| | - Tõnu Pullerits
- Department of Chemical Physics and NanoLund, Lund University , P.O. Box 124, 22100 Lund, Sweden
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