Reducing gases and VOCs optical sensing using surface plasmon spectroscopy of porous TiO2-Au colloidal films

被引：15
作者：
Della Gaspera, Enrico
Mura, Adriana
Menin, Enrico
Guglielmi, Massimo
Martucci, Alessandro [1 ]
机构：
[1] Univ Padua, INSTM, I-35131 Padua, Italy
来源：
SENSORS AND ACTUATORS B-CHEMICAL | 2013年 / 187卷
关键词：
Thin films; Noble metals; Anatase; Nanocomposites; Nanocrystal inks; Colloidal synthesis; THIN-FILMS; AEROBIC OXIDATION; AU; NANOPARTICLES; ALCOHOLS; SENSOR; WO3; CO;
D O I：
10.1016/j.snb.2012.12.041
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Colloidal solutions of Au and TiO2 nanoparticles are prepared and deposited as nanocrystal inks for the fabrication of porous thin films to be used as optical gas sensor. The introduction of Au nanoparticles within the anatase matrix affects the reactions mechanism improving the sensing process; moreover the Au surface plasmon resonance peak can be used for the realization of a gas sensor with tunable sensitivity. Different thermal treatments, Au dimensions and concentrations are investigated and optimized in order to tailor films microstructure and their sensing properties. The nanocomposites show reversible change in optical absorption/reflection when exposed to reducing gasses (H-2, CO) at 300 degrees C operative temperature or when exposed to volatile organic compounds (alcohols) at room temperature. (C) 2012 Elsevier B. V. All rights reserved.
引用
收藏
页码：363 / 370
页数：8
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