ZnO hierarchical nanostructures grown at room temperature and their C 2H5OH sensor applications

Kang Min Kim, Hae Ryong Kim, Kwon Il Choi, Hyo Joong Kim, Jong Heun Lee

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)

Abstract

Highly crystalline ZnO hierarchical nanostructures were prepared at room temperature through the alkaline hydrolysis of zinc salt by the forced mixing of two immiscible solutions: Zn-nitrate aqueous solution and oleic-acid-dissolved n-hexane solution. The oleic acid acted as a surfactant in the room-temperature formation of well-defined ZnO hierarchical nanostructures, which subsequently demonstrated a sensitive and selective detection of C2H 5OH. The responses of these hierarchical nanostructures to 10-100 ppm C2H5OH ranged from 15.7 to 177.7, which were 7-9 times higher than those of the agglomerated nanoparticles.

Original languageEnglish
Pages (from-to)745-751
Number of pages7
JournalSensors and Actuators, B: Chemical
Volume155
Issue number2
DOIs
Publication statusPublished - 2011 Jul 20

Keywords

  • CHOH sensors
  • Gas sensors
  • Hierarchical nanostructures
  • ZnO

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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