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Hydrothermally-grown ZnO nanowire tips for scanning tunnelling microscopy.

Wong, HS and Tan, SC and Wang, N and Durkan, C (2012) Hydrothermally-grown ZnO nanowire tips for scanning tunnelling microscopy. J Nanosci Nanotechnol, 12. pp. 2394-2398. ISSN 1533-4880

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Abstract

The probe tip is pivotal in determining the resolution and nature of features observed in the Scanning Tunnelling Microscope (STM). We have augmented a conventional Pt/Ir metallic tip with a hydrothermally grown ZnO nanowire (NW). Atomic resolution imaging of graphite is attained. Current-voltage (IV) characteristics demonstrate an asymmetry stemming from the unintentional n-type doping of the ZnO NW, whereas the expected Schottky barrier at the ZnO-Pt/Ir interface is shown to have negligible effect. Moreover the photoconductivity of the system is investigated, paving the way towards a photodetector capable of atomic resolution.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:22
Last Modified: 07 Apr 2014 01:18
DOI:

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