Investigation of size effects in the electrical resistivity of single electrochemically fabricated gold nanowires |
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| Institution: | 1. Physics Division, PINSTECH, Nilore, Islamabad, Pakistan;2. Institute of Material and Earth Science, Darmstadt University of Technology, Petersen Str. 23, 64287 Darmstadt, Germany;3. Gesellschaft für Schwerionenforschung (GSI), Planck Str. 1, 64291 Darmstadt, Germany;1. Department of Chemical Sciences, University of Naples “Federico II”, Comp. Univ. Monte Sant’Angelo, Via Cintia 21, 80126 Naples, Italy;2. Department of Physics “Ettore Pancini”, University of Naples Federico II, Comp. Univ. Monte Sant’Angelo, Via Cintia 21, 80126 Naples, Italy;1. Department of Materials and Optoelectronic Science, National Sun Yat-Sen University, Kaohsiung, Taiwan, ROC;2. School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang, 110034, PR China;3. School of Mechanical Engineering, Liaoning Shihua University, Fushun, 113001, PR China;1. School of Materials Science and Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi’an, Shaanxi 710072, China;1. Department of Materials Science and Engineering, I-Shou University, Kaohsiung 840, Taiwan;2. Department of Mechanical Engineering, Yuan Ze University, Chung-Li 320, Taiwan |
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| Abstract: | Single gold nanowires with diameters ranging between 80 and 300 nm were fabricated by electrochemical deposition in single-pore membranes. The wires were contacted by means of a macroscopic planar electrode on each membrane side. The resistance-versus-diameter behavior was measured and is discussed considering finite-size effects, i.e., additional electron scattering both at the wire surface and at grain boundaries. Resistance-versus-temperature curves display characteristics like a bulk metal that shows a linear behavior down to about 70 K and finally approaches a limited value below 40–50 K with a residual resistivity ratio ρ300 K/ρ20 K≈2.5. The temperature-dependent resistivity data of wires with diameters larger than 200 nm fit well with the model of Mayadas and Shatzkes for grain-boundary scattering, thus confirming that surface scattering is negligible in this range. |
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