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
N1 - Publisher Copyright:
© 2017, Springer Science+Business Media New York.
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 -