Preparation of Conductive Gold Nanowires in Confined Environment of Gold-Filled Polymer Nanotubes

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Mitschang, Fabian ; Langner, Markus ; Vieker, Henning ; Beyer, Andre ; Greiner, Andreas:
Preparation of Conductive Gold Nanowires in Confined Environment of Gold-Filled Polymer Nanotubes.
In: Macromolecular Rapid Communications. Bd. 36 (2015) Heft 3 . - S. 304-310.
ISSN 1521-3927
DOI: https://doi.org/10.1002/marc.201400485

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Abstract

Continuous conductive gold nanofibers are prepared via the tubes by fiber templates process. First, poly(l-lactide) (PLLA)-stabilized gold nanoparticles (AuNP) with over 60 wt% gold are synthesized and characterized, including gel permeation chromatography coupled with a diode array detector. Subsequent electrospinning of these AuNP with template PLLA results in composite nanofibers featuring a high gold content of 57 wt%. Highly homogeneous gold nanowires are obtained after chemical vapor deposition of 345 nm of poly(p-xylylene) (PPX) onto the composite fibers followed by pyrolysis of the polymers at 1050 degrees C. The corresponding heat-induced transition from continuous gold-loaded polymer tubes to smooth gold nanofibers is studied by transmission electron microscopy and helium ion microscopy using both secondary electrons and Rutherford backscattered ions.