Vapor-Sensitive Bragg Mirrors and Optical Isotherms from Mesoporous Nanoparticle Suspensions

被引：77

作者：

Kobler, Johannes ^{[1
,2
]}

Lotsch, Bettina V. ^{[3
]}

Ozin, Geoffrey A. ^{[3
]}

Bein, Thomas ^{[1
,2
]}

机构：

[1] Univ Munich, Dept Chem & Biochem, D-81377 Munich, Germany

[2] Univ Munich, Ctr NanoSci CeNS, D-81377 Munich, Germany

[3] Univ Toronto, Dept Chem, Mat Chem Res Grp, Ctr Inorgan & Polymer Nanomat,Lash Miller Chem La, Toronto, ON M5S 3H6, Canada

来源：

ACS NANO | 2009年 / 3卷 / 07期

基金：

加拿大自然科学与工程研究理事会;

关键词：

vapor sensor; porous films; Bragg reflector; nanoparticles; ellipsometry; optical isotherm; THIN-FILMS; PHOTONIC CRYSTALS;

D O I：

10.1021/nn800911c

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The preparation of wavelength-specific Bragg mirrors was realized by an effective and reproducible spin-coating approach using colloidal suspensions of functionalized mesoporous silica nanoparticles and titania sols. Due to the small particle size and the resulting low surface roughness, the formation of multilayers was possible without transmitting defects on the surface with every following coating step. The Bragg reflectors show sensitivity toward specific relative pressures of organic vapors such as toluene, giving rise to optically encoded adsorption properties as a function of solvent pressure and, thus, to optical adsorption isotherms.

引用

页码：1669 / 1676

页数：8

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