Humidity-sensing properties of a ZnO nanowire film as measured with a QCM


Erol A., Okur S., Yagmurcukardes N., Arikan M. C.

SENSORS AND ACTUATORS B-CHEMICAL, vol.152, no.1, pp.115-120, 2011 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 152 Issue: 1
  • Publication Date: 2011
  • Doi Number: 10.1016/j.snb.2010.09.005
  • Journal Name: SENSORS AND ACTUATORS B-CHEMICAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.115-120
  • Keywords: ZnO, QCM, Sauerbrey equation, Nanowire, Mechanical stiffness, QUARTZ-CRYSTAL MICROBALANCE, CATALYST-FREE GROWTH
  • Istanbul University Affiliated: Yes

Abstract

The humidity-sensing properties of ZnO nanowires synthesized by carbothermal catalyst-free vapor solid (VS) technique were studied. The morphology and the crystal structure were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The humidity adsorption and desorption kinetics of the synthesized ZnO nanowires were investigated via quartz crystal microbalance (QCM) measurements. The observed positive frequency shift of ZnO nanowires when loaded on the QCM crystal under varying relative humidity conditions can be explained in terms of visco-elastic variations in their mechanical stiffness. (c) 2010 Elsevier B.V. All rights reserved.