Near-infrared-emitting colloidal Ag 2 S quantum dots excited by an 808 nm diode laser
作者: Yanyan ZhangJinfeng XiaCaixia LiGuohong ZhouWei YangDandan WangHuiping ZhengYuansheng DuXi LiQiang Li
作者单位: 1East China Normal University
2Chinese Academy of Sciences
3Yuxi Normal University
刊名: Journal of Materials Science, 2017, Vol.52 (16), pp.9424-9429
来源数据库: Springer Journal
DOI: 10.1007/s10853-017-1131-5
关键词: Fluorescence Resonance Energy TransferIndocyanine GreenAg2SThioglycolic AcidIncrease Ligand Absorption
英文摘要: 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...
原始语种摘要: 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...
全文获取路径: Springer  (合作)
分享到:
来源刊物:
影响因子:2.163 (2012)

×
关键词翻译
关键词翻译
  • colloidal 胶质的
  • diode 二极管
  • emitting 发出
  • quantum 量子
  • laser 激光
  • attributed 属性
  • initially 最初
  • Transfer 转运牌汽车
  • dilution 稀度
  • infrared 红外线