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 journalArticle

56 Citations (Scopus)


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
Issue number2
Publication statusPublished - 2011 Jul 20


  • 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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