Premium
Micro/Nanostructured Ordered Porous Films and Their Structurally Induced Control of the Gas Sensing Performances
Author(s) -
Jia Lichao,
Cai Weiping
Publication year - 2010
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201001216
Subject(s) - materials science , porosity , fabrication , nanotechnology , microstructure , substrate (aquarium) , monolayer , selectivity , composite material , catalysis , medicine , oceanography , alternative medicine , pathology , geology , biochemistry , chemistry
A simple and flexiable route is presented to fabricate ordered micro/nanostructured porous films, based on a monolayer colloidal crystal template and solution dipping. In 2 O 3 is chosen as a main model material to demonstrate the validity of the given fabrication strategy. It has been shown that the porous films with different microstructures, can be constructed directly on any desired substrate (with flat, curved, or even rough surface). The separately tunable sensitivity and response time in a large range and the gas sensing performances with both high sensitivity and fast response have been obtained only by controlling microstructures of the porous films. High stability, good reproducibility, and selectivity of the sensing performance have been achieved. Further, micro/nanostructured porous film sensors with desired sensing performances are designed and fabricated. This work could be important towards practical applications of micro/nanostructured porous‐film‐based sensors in the near future.