Synthesis and Optical Properties of Linker-Free TiO2/CdSe Nanorods

被引：14

作者：

Hassan, Yasser ^{[1
,3
]}

Chuang, Chi-Hung ^{[2
]}

Kobayashi, Yoichi ^{[1
]}

Coombs, Neil ^{[1
]}

Gorantla, Sandeep ^{[4
]}

Botton, Gianluigi A. ^{[4
]}

Winnik, Mitchell A. ^{[1
]}

Burda, Clemens ^{[2
]}

Scholes, Gregory D. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

[2] Case Western Reserve Univ, Dept Chem, Ctr Chem Dynam & Nanomat Res, Cleveland, OH 44106 USA

[3] Zagazig Univ, Fac Sci, Dept Chem, Zagazig 44511, Egypt

[4] McMaster Univ, Dept Mat Sci & Engn, Hamilton, ON L8S 4L8, Canada

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

CDSE QUANTUM DOTS; ULTRAFAST ELECTRON-TRANSFER; SOLAR-CELLS; CHARGE SEPARATION; SEMICONDUCTOR NANOCRYSTALS; CORE/SHELL NANOCRYSTALS; ORGANIC COMPLEXES; TRANSFER DYNAMICS; CARRIER DYNAMICS; HOLE TRANSFER;

D O I：

10.1021/jp411830u

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Linker-free TiO2/CdSe hybrid nanorods (NRs) were prepared by growing CdSe QDs in the presence of TiO2, NR seeds using seeded growth type colloidal injection approach. TEM studies revealed the abundant formation of anatase TiO2 NRs with different lengths. We found that the as-prepared TiO2 seeds determined the morphology of TiO2/CdSe Nits. The photophysics of these materials were studied by photoluminescence (FL) and femtosecond transient absorption spectroscopy. While we observed the efficient PL quenching in TiO2/CdSe NRs, the bleach dynamics of TiO2/CdSe NRs is similar to that of CdSe NRs. It suggests that while surface traps that arise from the lattice mismatch between CdSe and TiO2 are mainly observed in transient absorption measurements the ultrafast exciton dissociation over the experimental time resolution occurs in TiO2/CdSe NRs.

引用

页码：3347 / 3358

页数：12

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