Next Article in Journal
Coexistence of WiFi and WiMAX Systems Based on PS-Request Protocols
Next Article in Special Issue
Design of Selective Gas Sensors Using Additive-Loaded In2O3 Hollow Spheres Prepared by Combinatorial Hydrothermal Reactions
Previous Article in Journal
Terbium to Quantum Dot FRET Bioconjugates for Clinical Diagnostics: Influence of Human Plasma on Optical and Assembly Properties
Article Menu

Export Article

Open AccessArticle

Design of Highly Sensitive C2H5OH Sensors Using Self-Assembled ZnO Nanostructures

Department of Materials Science and Engineering, Korea University, Seoul 136-713, Korea
Author to whom correspondence should be addressed.
Sensors 2011, 11(10), 9685-9699;
Received: 5 September 2011 / Revised: 26 September 2011 / Accepted: 8 October 2011 / Published: 12 October 2011
(This article belongs to the Special Issue Sensing at the Nano-Scale: Chemical and Bio-Sensing)
PDF [1972 KB, uploaded 21 June 2014]


Various ZnO nanostructures such as porous nanorods and two hierarchical structures consisting of porous nanosheets or crystalline nanorods were prepared by the reaction of mixtures of oleic-acid-dissolved ethanol solutions and aqueous dissolved Zn-precursor solutions in the presence of NaOH. All three ZnO nanostructures showed sensitive and selective detection of C2H5OH. In particular, ultra-high responses (Ra/Rg = ~1,200, Ra: resistance in air, Rg: resistance in gas) to 100 ppm C2H5OH was attained using porous nanorods and hierarchical structures assembled from porous nanosheets, which is one of the highest values reported in the literature. The gas response and linearity of gas sensors were discussed in relation to the size, surface area, and porosity of the nanostructures. View Full-Text
Keywords: ZnO; gas sensor; nanostructures, hierarchical structures; self-assembly ZnO; gas sensor; nanostructures, hierarchical structures; self-assembly
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Kim, K.-M.; Kim, H.-R.; Choi, K.-I.; Kim, H.-J.; Lee, J.-H. Design of Highly Sensitive C2H5OH Sensors Using Self-Assembled ZnO Nanostructures. Sensors 2011, 11, 9685-9699.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top