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Localized Electroless Ag Plating at a Tip Apex for Scanning Kelvin Probe Microscopy

By Chun-Ting Lin, Ming-Han Yu, James Su, Po-Li Chen, Ming-Hua Shiao, Akos Nemcsics and Mao-Nan Chang


A typical probe for scanning Kelvin probe microscopy (SKPM) consists of an atomic force microscopy (AFM) probe with a metallic coating. Such probes result in a large sensing area and lead to poor spatial resolution due to the stray-field effect. With electroless Ag plating (EAP), we employed an AFM system to form a Ag nanodot (AND) at the apex of the probe tip, which reduces the sensing area of the SKPM probe, thereby suppressing the stray-field effect. It was revealed that the tip with an AND structure had improved the spatial resolution in SKPM. Our experimental results showed that the EAP process can be completed in a few seconds, implying that localized EAP is a simple and rapid process for preparing an AND structure at the tip apex in SKPM measurements

Year: 2014
DOI identifier: 10.7567/JJAP.52.06GF03
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