Gas sensing properties of SnO2 nanowires on micro-heater

In Sung Hwang, Eui Bok Lee, Sun Jung Kim, Joong Ki Choi, Jung Ho Cha, Ho Jun Lee, Byeong Kwon Ju, Jong Heun Lee

Research output: Contribution to journalArticlepeer-review

48 Citations (Scopus)


The SnO2 nanowires (NWs) network gas sensors were fabricated on a micro-electrode and heater suspended in a cavity. The sensors showed selective detection to C2H5OH at a heater power during sensor operation as low as 30-40 mW. The gas response and response speed of the SnO2 NWs sensor to 100 ppm C2H5OH were 4.6- and 4.7-fold greater, respectively, than those of the SnO2 nanoparticles (NPs) sensor with the same electrode geometry. The reasons for these enhanced gas sensing characteristics are discussed in relation to the sensing materials and sensor structures.

Original languageEnglish
Pages (from-to)295-300
Number of pages6
JournalSensors and Actuators, B: Chemical
Issue number2
Publication statusPublished - 2011 Jun 20

Bibliographical note

Funding Information:
This work was supported by the Korea Science and Engineering Foundation (KOSEF) NRL program (No. R0A-2008-000-20032-0), the IT R&D program of MKE/IITA [2006-S-078-03, Environmental Sensing and Alerting System with Nano-Wire and Nano-tube], and a grant from the Fundamental R&D program for Core Technology of Materials (M2008010013) funded by the Korean government.


  • C HOH
  • Gas sensors
  • Micro-heater
  • Nanowires (NWs)
  • SnO

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry


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