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Direct Conversion of Single‐Layer SnO Nanoplates to Multi‐Layer SnO 2 Nanoplates with Enhanced Ethanol Sensing Properties
Author(s) -
Li KunMu,
Li YiJing,
Lu MingYen,
Kuo ChungI,
Chen LihJuann
Publication year - 2009
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.200801774
Subject(s) - materials science , fabrication , annealing (glass) , layer (electronics) , nanotechnology , substrate (aquarium) , layer by layer , chemical engineering , composite material , medicine , oceanography , alternative medicine , pathology , geology , engineering
Direct conversion of single‐layer SnO nanoplates to multi‐layer SnO 2 nanoplates is achieved by annealing in an O 2 ambient at 700 °C. For 50 ppm ethanol, the sensitivities of the multi‐layer SnO 2 nanoplates are more than double that of single‐layer SnO 2 nanoplates, which are also formed from the single‐layer SnO. The higher sensitivity of the multi‐layer nanoplates is attributed to their larger surface/volume ratio. The facile fabrication of interconnected multi‐layer SnO 2 nanoplates at low temperature directly on a Si substrate and sensing chip without the aid of catalysts offers vast advantages over competing methods for the fabrication of high‐sensitivity SnO 2 sensors.