journal article·2008-06

“Nanofingers” Based on Binary Gold–Polypyrrole Nanowires

Valber A. Pedrosa, Xiliang Luo, Jared Burdick, Joseph Wang

Small· Volume 4· Issue 6
Publisher page

Abstract

Round the bend: Reversible bending of conducting-polymer–gold nanowires is achieved by template synthesis and a selective coating process that leaves only one side of the polymer segment exposed. The bending motion of the resulting “nanofingers” can be tailored by adjusting the applied potential (see figure). This represents the smallest bending arm reported to date and the first example of electrochemically induced nanowire bending.
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Research context

OpenAlex topics: Conducting polymers and applications · Advanced Sensor and Energy Harvesting Materials · Polymer Surface Interaction Studies

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15. The estimate of average strain (εaxial) was calculated using the general formula for a beam in bending (εaxial = − · r/ρ) whereris the distance from the gold layer to the center of the polypyrrole andρis the radius of curvature of the nanofinger. Thus for a 250‐nm‐diameter nanofinger with a radius of curvature of 5.1 µm the strain isεaxial = −0.125/5.1 = −2.5 × 10−2or −2.5%.