Format

Send to

Choose Destination
See comment in PubMed Commons below
Nanotechnology. 2009 Dec 9;20(49):495502. doi: 10.1088/0957-4484/20/49/495502. Epub 2009 Nov 6.

Fabrication and good ethanol sensing of biomorphic SnO2 with architecture hierarchy of butterfly wings.

Author information

1
State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai 200240, People's Republic of China.

Abstract

Using super-hydrophobic butterfly wings as templates, we developed an aqueous sol-gel soakage process assisted by ethanol-wetting and followed by calcination to fabricate well-organized porous hierarchical SnO(2) with connective hollow interiors and thin mesoporous walls. The exquisite hierarchical architecture of SnO(2) is faithfully replicated from the lightweight skeleton of butterfly wings at the level from nano- to macro-scales. On the basis of the self-assembly of SnO(2) nanocrystallites with diameter around 7.0 nm, the interconnected tubes (lamellas), the fastigiated hollow tubers (pillars) and the double-layered substrates further construct the biomorphic hierarchical architecture. Benefiting from the small grain size and the unique hierarchical architecture, the biomorphic SnO(2) as an ethanol sensor exhibits high sensitivity (49.8 to 50 ppm ethanol), and fast response/recovery time (11/31 s to 50 ppm ethanol) even at relatively low working temperature (170 degrees C).

PMID:
19893155
DOI:
10.1088/0957-4484/20/49/495502
[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for IOP Publishing Ltd.
    Loading ...
    Support Center