Mapping of Local Conductivity Variations on Fragile Nanopillar Arrays by Scanning Conductive Torsion Mode Microscopy

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• 作者：Stefan A. L. Weber ; Niko Haberkorn ; Patrick Theato ; Rdiger Berger
• 刊名：Nano Letters
• 出版年：2010
• 出版时间：April 14, 2010
• 年：2010
• 卷：10
• 期：4
• 页码：1194-1197
• 全文大小：255K
• 年卷期：v.10,no.4(April 14, 2010)
• ISSN：1530-6992

文摘

A gentle method that combines torsion mode topography imaging with conductive scanning force microscopy is presented. By applying an electrical bias voltage between tip and sample surface, changes in the local sample conductivity can be mapped. The topography and local conductivity variations on fragile free-standing nanopillar arrays were investigated. These samples were fabricated by an anodized aluminum oxide template process using a thermally cross-linked triphenylamine-derivate semicondcutor. The nanoscale characterization method is shown to be nondestructive. Individual nanopillars were clearly resolved in topography and current images that were recorded simultaneously. Local current−voltage characteristics suggest a space-charge limited conduction in the semiconducting nanopillars.