物理化学学报2017，Vol.33Issue(11)：2184-2190,7.DOI:10.3866/PKU.WHXB201705222
金纳米颗粒在不同包裹介质中的超快等离子体动力学
Effect of Surrounding Media on Ultrafast Plasmon Dynamics of Gold Nanoparticles
摘要
Abstract
Herein,we prepared four samples,namely gold/poly(sodium-p-styrenesulfonate) (Au/PSS),gold/silicon dioxide (Au/SiO2),gold/titanium dioxide (Au/TiO2),and gold/cuprous oxide (Au/Cu2O)core/shell nanocomposites,to investigate how the surrounding medium affects the ultrafast plasmon dynamics of Au nanoparticles (NPs).We recorded femtosecond transient absorption spectra of Au NPs in Au/PSS,Au/SiO2,Au/TiO2,and Au/Cu2O core/shell nanocomposites at various time delays.We found that the spectral features in the femtosecond transient absorption spectra of Au NPs in Au/TiO2 and Au/Cu2O core/shell nanocomposites were dramatically different from those of Au NPs in Au/PSS and Au/SiO2 core/shell nanocomposites.A comprehensive analysis of the ultrafast plasmon dynamics of Au NPs in the core/shell nanocomposites revealed that following excitation of the resonance plasmon band of Au NPs,the exited electrons could be efficiently transferred into the conduction bands of TiO2 and CU2O in Au/TiO2 and Au/Cu2O core/shell nanocomposites.关键词
飞秒瞬态吸收光谱/等离子体共振激发/电子转移/金纳米颗粒/核/壳结构Key words
Femtosecond transient absorption spectroscopy/Plasmon resonance excitation/Electron transfer/Gold nanoparticle/Core/shell structure分类
化学化工引用本文复制引用
陈晓宇,王经东,于安池..金纳米颗粒在不同包裹介质中的超快等离子体动力学[J].物理化学学报,2017,33(11):2184-2190,7.基金项目
The project was supported by the National Natural Science Foundation of China (21373269).国家自然科学基金(21373269)资助项目 （21373269）
