Nb-Doped Colloidal TiO2 Nanocrystals with Tunable Infrared Absorption

被引：175

作者：

De Trizio, Luca ^{[1
]}

Buonsanti, Raffaella ^{[2
]}

Schimpf, Alina M. ^{[3
]}

Llordes, Anna ^{[2
]}

Gamelin, Daniel R. ^{[3
]}

Simonutti, Roberto ^{[1
]}

Milliron, Delia J. ^{[2
]}

机构：

[1] Univ Milano Bicocca, Dept Mat Sci, I-20125 Milan, Italy

[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Mol Foundry, Berkeley, CA 94720 USA

[3] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

CHEMISTRY OF MATERIALS | 2013年 / 25卷 / 16期

基金：

美国国家科学基金会;

关键词：

doping titanium oxide; plasmonic nanocrystals; transparent conducting oxide; metal oxide; TRANSPARENT CONDUCTING OXIDES; ANATASE TIO2; OPTICAL-PROPERTIES; LIGHT-SCATTERING; FILMS; NIOBIUM; DOPANT; FERROMAGNETISM; NANOPARTICLES; MONODISPERSE;

D O I：

10.1021/cm402396c

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：

We report a new colloidal synthesis of niobiumdoped TiO2 anatase nanocrystals (NCs) that allows for the preparation of similar to 10 nm NCs with control over the amount of Nb doping up to similar to 14%. The incorporation of niobium ions leads to the appearance of a tunable, broad absorption peak that ranges from the visible range to the mid-infrared. This optical behavior is attributed to the substitution of Nb5+ on Ti4+ sites generating free carriers inside the conduction band of the TiO2 NCs as supported by optical and electron paramagnetic resonance spectroscopic investigations. At the same time, the incorporation of progressively more niobium ions drives an evolution of the shape of the NCs from tetragonal platelets to "peanutlike" rods.

引用

页码：3383 / 3390

页数：8

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