Journal
NANOTECHNOLOGY
Volume 18, Issue 10, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/18/10/105305
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Local electrochemical deposition of freestanding platinum nanowires was demonstrated with a new approach-electrochemical fountain pen nanofabrication (ec-FPN). The ec-FPN exploits the meniscus formed between an electrolyte-filled nanopipette('the fountain pen') and a conductive substrate to serve as a confined electrochemical cell for reducing and depositing metal ions. Freestanding Pt nanowires were continuously grown off the substrate by moving the nanopipette away from the substrate while maintaining a stable meniscus between the nanopipette and the nanowire growth front. High quality and high aspect-ratio polycrystalline Pt nanowires with diameter of similar to 150 nm and length over 30 mu m were locally grown with ec-FPN. The ec-FPN technique is shown to be an efficient and clean technique for localized fabrication of a variety of vertically grown metal nanowires and can potentially be used for fabricating freeform 3D nanostructures.
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