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Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser
Zhang, Yanyan1; Xia, Jinfeng2; Li, Caixia3; Zhou, Guohong2; Yang, Wei1; Wang, Dandan1; Zheng, Huiping1; Du, Yuansheng1; Li, Xi1; Li, Qiang1
2017
Source PublicationJournal of Materials Science
ISSN00222461
Volume52Issue:16Pages:9424-9429
AbstractThioglycolic acid (TGA)-coated colloidal Ag2S quantum dots (QDs) emitting in the near-infrared (NIR) region upon excitation by an 808 nm diode laser were synthesized. The observed photoluminescence (PL) was attributed to the presence of ligand-modified Ag2S on the QD surfaces and could be easily controlled by a simple dilution process due to the concentration-dependent surface structure of the colloidal QDs. Upon dilution of the solution, the PL intensity initially increased before later decreasing, with a blueshift being observed in the PL spectra. These phenomena can be accounted for by the aggregation of QDs due to a decrease in the content of ligand-modified Ag2S on the QD surfaces upon dilution, which in turn affected the fluorescence resonance energy transfer (FRET), and re-emission of the surface energy level. © 2017, Springer Science+Business Media New York.
DOI10.1007/s10853-017-1131-5
EI Accession Number20171803619271
EI KeywordsSilver compounds
EI Classification Number714.2 Semiconductor Devices and Integrated Circuits - 744.4.1 Semiconductor Lasers - 761 Nanotechnology - 801.4 Physical Chemistry - 931.2 Physical Properties of Gases, Liquids and Solids
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Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/25900
Collection中国科学院上海硅酸盐研究所
Affiliation1.Department of Chemistry, East China Normal University, Shanghai; 200062, China;
2.Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai; 200050, China;
3.Yuxi Normal University, Yuxi; Yunnan Province; 653100, China
Recommended Citation
GB/T 7714
Zhang, Yanyan,Xia, Jinfeng,Li, Caixia,et al. Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser[J]. Journal of Materials Science,2017,52(16):9424-9429.
APA Zhang, Yanyan.,Xia, Jinfeng.,Li, Caixia.,Zhou, Guohong.,Yang, Wei.,...&Li, Qiang.(2017).Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser.Journal of Materials Science,52(16),9424-9429.
MLA Zhang, Yanyan,et al."Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser".Journal of Materials Science 52.16(2017):9424-9429.
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