等离子体子
超短脉冲
材料科学
电荷(物理)
光电子学
表面等离子体子
微粒
光学
化学
物理
量子力学
有机化学
激光器
作者
Xueyi Guo,Sheng Liu,Weijia Wang,Chongyao Li,Ying Yang,Qinghua Tian,Yong Liu
出处
期刊:Nanoscale advances
[The Royal Society of Chemistry]
日期:2021-01-01
卷期号:3 (12): 3481-3490
被引量:10
摘要
Recombination centers generated from structural and interfacial defects in nanoheterostructures (NHs) prevent effective photo-induced charge transfer and have blocked the advance of many photoresponsive applications. Strategies to construct high-quality interfaces in NHs are emerging but are limited in the release of interfacial strain and the integrality of the sublattice. Herein, we synthesize single-particulate Cu1.94S-ZnS NHs with a continuous sublattice using a nanoscale cation exchange reaction (CE). Under near-infrared (NIR) radiation (λ = 1500 nm), femtosecond open-aperture (OA) Z-scan measurements are applied to investigate the nonlinear optical features of samples and verify the existence of plasma-induced charge transfer in the Cu1.94S-ZnS NHs system. The resulting charge transfer time (τCT) of ∼0.091 picoseconds (ps) was confirmed by the femtosecond time-resolved pump-probe technique. Such an ultrafast charge transfer process has been rarely reported in semiconductor-semiconductor NHs. The results suggest that CE can be used as a promising tool to construct well-ordered interfacial structures, which are significant for the performance enhancement of NHs for photon utilization.
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