Synthesis of ZnO tetrapods for flexible and transparent UV sensors

Simas Rackauskas, Kimmo Mustonen, Terhi Järvinen, Marco Mattila, Olga Klimova, Hua Jiang, Oleg Tolochko, Harri Lipsanen, Esko I. Kauppinen, Albert G. Nasibulin

Research output: Contribution to journalArticlepeer-review

46 Citations (Scopus)

Abstract

ZnO tetrapods (ZnO-Ts) were synthesized in a vertical flow reactor by gas phase oxidation of Zn vapor in an air atmosphere. The morphology of the product was varied from nearly spherical nanoparticles to ZnO-Ts, together with the partial pressure of Zn and reaction temperature. MgO introduced during synthesis, increased the band gap, the optical transparency in the visible range, and also changed the ZnO-T structure. Fabricated flexible transparent UV sensors showed a 45-fold current increase under UV irradiation with an intensity of 30Wcm 2 at a wavelength of 365nm and response time of 0.9s.

Original languageEnglish
Article number095502
JournalNanotechnology
Volume23
Issue number9
DOIs
Publication statusPublished - 9 Mar 2012
Externally publishedYes

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