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Photoacoustic Characterization of Randomly Oriented Silver Nanowire Films

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Abstract

In this work, the photoacoustic characterization in the UV/Vis range of randomly oriented silver nanowire films deposited onto either a quartz or polymeric substrate is presented. This study was performed for a set of films differing in both metallic nanowire dimensions, as well as metal content. Samples were prepared starting from suspensions of Ag nanowires in isopropanol (IPA) \((25~\mathrm{mg}{\cdot }\mathrm{ml}^{-1})\), differing in both the length and diameter of the nanowires. The obtained films were characterized by scanning electron micrography (SEM) images; thus, the metal filling factor was retrieved with MATLAB software based on a visual method. Following the morphological characterization, both spectrophotometry and the photoacoustic spectroscopy (PAS) technique were employed to investigate in detail the absorbance spectra of silver nanowire films, in order to evidence their peculiar properties in the UV/Vis spectral range. Specifically, this photothermal technique is particularly useful to investigate a film that may exhibit relevant scattering phenomena, as for metallic nanowire films. The obtained experimental results show that the choice of the metal filling factor may affect the absorbance spectra of the resulting mesh.

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Acknowledgments

This work has been performed in the framework of the “FISEDA” program granted by the Italian Ministry of Defence.

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Authors and Affiliations

  1. Dipartimento di Scienze di Base ed Applicate per l’Ingegneria, Sapienza Università di Roma, Via A.Scarpa 16, 00161, Rome, Italy

    R. Li Voti, G. Leahu, M. C. Larciprete, C. Sibilia & M. Bertolotti

  2. School of Electrical Engineering SMARAD Center of Excellence, Aalto University, P.O. Box 13000, 00076, Aalto, Finland

    I. Nefedov

  3. Department of Applied Physics, Aalto University School of Science, Puumiehenkuja 2, P.O. Box 15100, 00076, Espoo, Finland

    I. V. Anoshkin

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  1. R. Li Voti
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  2. G. Leahu
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  3. M. C. Larciprete
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  4. C. Sibilia
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  5. M. Bertolotti
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  7. I. V. Anoshkin
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Correspondence to R. Li Voti.

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Li Voti, R., Leahu, G., Larciprete, M.C. et al. Photoacoustic Characterization of Randomly Oriented Silver Nanowire Films. Int J Thermophys 36, 1342–1348 (2015). https://doi.org/10.1007/s10765-014-1774-2

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  • DOI: https://doi.org/10.1007/s10765-014-1774-2

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