Plasmonic TiO2:Au composite layers deposited in situ by chemical spray pyrolysis

被引：13

作者：

Acik, I. Oja ^{[1
]}

Oyekoya, N. G. ^{[1
]}

Mere, A. ^{[1
]}

Loot, A. ^{[2
]}

Dolgov, L. ^{[2
]}

Mikli, V. ^{[3
]}

Krunks, M. ^{[1
]}

Sildos, I. ^{[2
]}

机构：

[1] Tallinn Univ Technol, Dept Mat Sci, Lab Thin Film Chem Technol, EE-19086 Tallinn, Estonia

[2] Univ Tartu, Inst Phys, EE-50411 Tartu, Estonia

[3] Tallinn Univ Technol, Dept Mat Sci, Chair Semicond Mat Technol, EE-19086 Tallinn, Estonia

来源：

SURFACE & COATINGS TECHNOLOGY | 2015年 / 271卷

关键词：

TiO2; Gold nanoparticles; Composite layer; Chemical spray pyrolysis; Surface plasmon resonance; NANOPARTICLE-DOPED TIO2; GOLD NANOPARTICLES; THIN-FILMS; SURFACE; RESONANCE;

D O I：

10.1016/j.surfcoat.2015.01.036

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Composite TiO2 layers with embedded Au-nanopartides with a size of 8-20 nm were deposited in situ by chemical spray pyrolysis. EDS studies show that increase in the deposition temperature from 260 to 300 degrees C decreases the [Au]/[Ti] ratio down to the vanishing of Au at in 400 degrees C. The mean crystallite size of the Au-nanoparticles is slightly decreasing from 17-21 nm to 10-13 nm with increasing deposition temperature from 260 to 300 degrees C. However, the annealing at 400 degrees C has minor affect on the size of the Au-nanoparticles. Annealing at 400 degrees C results in crystalline anatase TiO2 matrix with its mean crystallite size decreasing with increasing the [Au]/[Ti] ratio in the composite layers. The total transmittance and reflectance spectra of the TiO2 and TiO2:Au composite layers are complemented by the Mie calculations, showing that the red shift of the surface plasmon resonance band from 570 to 620 nm is associated with the increase in the refractive index of the TiO2 matrix. (c) 2015 Elsevier B.V. All rights reserved.

引用

页码：27 / 31

页数：5

共 24 条

[1] Surface plasmon resonance caused by gold nanoparticles formed on sprayed TiO2 films [J].