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Single layer porous gold films grown at different temperatures
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.ORCID iD: 0000-0003-2873-7875
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.ORCID iD: 0000-0001-9137-3440
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.ORCID iD: 0000-0001-7329-3359
2010 (English)In: Physica. B, Condensed matter, ISSN 0921-4526, E-ISSN 1873-2135, Vol. 405, no 21, p. 4517-4522Article in journal (Refereed) Published
Abstract [en]

Large area porous gold films can be used in several areas including electrochemical electrodes, as an essential component in sensors, or as a conducting material in electronics. Here, we report on evaporation induced crystal growth of large area porous gold films at 20, 40 and 60 °C. The gold films were grown on liquid surface at 20 °C, while the films were grown on the wall of beakers when temperature increased to 40 and 60 °C. The porous gold films consisted of a dense network of gold nanowires as characterized by TEM and SEM. TEM diffraction results indicated that higher temperature formed larger crystallites of gold wires. An in situ TEM imaging of the coalescence of gold nanoparticles mimicked the process of the growth of these porous films, and a plotting of the coalescence time and the neck radius showed a diffusion process. The densities of these gold films were also characterized by transmittance, and the results showed film grown at 20 °C had the highest density, while the film grown at 60 °C had the lowest consistent with SEM and TEM characterization. Electrical measurements of these gold films showed that the most conductive films were the ones grown at 40 °C. The conductivities of the gold films were related to the amount of contamination, density and the diameter of the gold nanowires in the films. In addition, a gold film/gold nanoparticle hybrid was made, which showed a 10% decrease in transmittance during hybridization, pointing to applications as chemical and biological sensors. © 2010 Elsevier B.V. All rights reserved.

Place, publisher, year, edition, pages
2010. Vol. 405, no 21, p. 4517-4522
Keywords [en]
Coalescence; Gold film; Porous; Single layer; Temperature
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-11960DOI: 10.1016/j.physb.2010.08.029ISI: 000283209400025Scopus ID: 2-s2.0-77957114866OAI: oai:DiVA.org:miun-11960DiVA, id: diva2:349576
Available from: 2010-09-07 Created: 2010-09-07 Last updated: 2017-12-12Bibliographically approved

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Zhang, RenyunHummelgård, MagnusOlin, Håkan

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