Properties of Urchin-Structured Zinc Oxide nanorods gas sensor by using polystyrene sphere array

Jong Woo Kim, Do Hoon Kim, Tae Hoon Ki, Jung Hyuk Park, Jae Min Myoung

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Urchin-structured zinc oxide(ZnO) nanorod(NR) gas sensors were successfully demonstrated on a polyimide(PI) substrate, using single wall carbon nanotubes(SWCNTs) as the electrode. The ZnO NRs were grown with ZnO shells arranged at regular intervals to form a network structure with maximized surface area. The high surface area and numerous junctions of the NR network structure was the key to excellent gas sensing performance. Moreover, the SWCNTs formed a junction barrier with the ZnO which further improved sensor characteristics. The fabricated urchin-structured ZnO NR gas sensors exhibited superior performance upon NO2 exposure with a stable response of 110, fast rise and decay times of 38 and 24 sec, respectively. Comparative analyses revealed that the high performance of the sensors was due to a combination of high surface area, numerous active junction points, and the use of the SWCNTs electrode. Furthermore, the urchin-structured ZnO NR gas sensors showed sustainable mechanical stability. Although degradation of the devices progressed during repeated flexibility tests, the sensors were still operational even after 10000 cycles of a bending test with a radius of curvature of 5 mm.

Original languageEnglish
Pages (from-to)658-663
Number of pages6
JournalKorean Journal of Materials Research
Volume27
Issue number12
DOIs
Publication statusPublished - 2017 Dec 1

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Zinc Oxide
Polystyrenes
Zinc oxide
Chemical sensors
Nanorods
Carbon Nanotubes
Carbon nanotubes
Sensors
Electrodes
Mechanical stability
Bending tests
Polyimides
Gases
Degradation
Substrates

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Kim, Jong Woo ; Kim, Do Hoon ; Ki, Tae Hoon ; Park, Jung Hyuk ; Myoung, Jae Min. / Properties of Urchin-Structured Zinc Oxide nanorods gas sensor by using polystyrene sphere array. In: Korean Journal of Materials Research. 2017 ; Vol. 27, No. 12. pp. 658-663.
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Properties of Urchin-Structured Zinc Oxide nanorods gas sensor by using polystyrene sphere array. / Kim, Jong Woo; Kim, Do Hoon; Ki, Tae Hoon; Park, Jung Hyuk; Myoung, Jae Min.

In: Korean Journal of Materials Research, Vol. 27, No. 12, 01.12.2017, p. 658-663.

Research output: Contribution to journalArticle

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