Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser

Yanyan Zhang; Jinfeng Xia; Caixia Li; Guohong Zhou; Wei Yang; Dandan Wang; Huiping Zheng; Yuansheng Du; Xi Li; Qiang Li

doi:10.1007/s10853-017-1131-5

Near-infrared-emitting colloidal Ag₂S quantum dots excited by an 808 nm diode laser

Yanyan Zhang
, Jinfeng Xia
, Caixia Li
, Guohong Zhou
, Wei Yang
, Dandan Wang
, Huiping Zheng
, Yuansheng Du
, Xi Li
, Qiang Li^*

^*Corresponding author for this work

School of Chemistry and Molecular Engineering

Research output: Contribution to journal › Article › peer-review

21 Scopus citations

Abstract

Thioglycolic 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.

Original language	English
Pages (from-to)	9424-9429
Number of pages	6
Journal	Journal of Materials Science
Volume	52
Issue number	16
DOIs	https://doi.org/10.1007/s10853-017-1131-5
State	Published - 1 Aug 2017

Access to Document

10.1007/s10853-017-1131-5

Cite this

@article{ed14b729e8ab42278770e634cde3cfdf,

title = "Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser",

abstract = "Thioglycolic 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.",

author = "Yanyan Zhang and Jinfeng Xia and Caixia Li and Guohong Zhou and Wei Yang and Dandan Wang and Huiping Zheng and Yuansheng Du and Xi Li and Qiang Li",

note = "Publisher Copyright: {\textcopyright} 2017, Springer Science+Business Media New York.",

year = "2017",

month = aug,

day = "1",

doi = "10.1007/s10853-017-1131-5",

language = "英语",

volume = "52",

pages = "9424--9429",

journal = "Journal of Materials Science",

issn = "0022-2461",

publisher = "Springer",

number = "16",

}

TY - JOUR

T1 - Near-infrared-emitting colloidal Ag2S quantum dots excited by an 808 nm diode laser

AU - Zhang, Yanyan

AU - Xia, Jinfeng

AU - Li, Caixia

AU - Zhou, Guohong

AU - Yang, Wei

AU - Wang, Dandan

AU - Zheng, Huiping

AU - Du, Yuansheng

AU - Li, Xi

AU - Li, Qiang

PY - 2017/8/1

Y1 - 2017/8/1

N2 - Thioglycolic 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.

AB - Thioglycolic 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.

UR - https://www.scopus.com/pages/publications/85018241587

U2 - 10.1007/s10853-017-1131-5

DO - 10.1007/s10853-017-1131-5

M3 - 文章

AN - SCOPUS:85018241587

SN - 0022-2461

VL - 52

SP - 9424

EP - 9429

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 16

ER -

Near-infrared-emitting colloidal Ag₂S quantum dots excited by an 808 nm diode laser

Abstract

Access to Document

Other files and links

Fingerprint

Cite this