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Issue 19, 2015
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Anisotropic optical properties of oriented silver nanorice and nanocarrots in stretched polymer films

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Abstract

Stretching-induced orientation of both silver nanorice and silver nanocarrots dispersed in or deposited on the surface of poly(vinyl alcohol) (PVA) films was investigated using polarized UV-visible-near-infrared (NIR) spectroscopy and atomic force microscopy (AFM). The results show that the film stretching not only aligns the long axis of individual nanorice or nanocarrots preferentially along the stretching direction, but also induces assembly of these nanostructures into oriented arrays of random lengths in the deformation process. Consequently, the longitudinal surface plasmon resonance peaked at 820 nm for nanorice and 1050 nm for nanocarrots before stretching can be replaced by continuous extinction over the entire 800–1800 nm NIR spectral range after stretching. Stretched PVA films containing either silver nanorice or nanocarrots thus display polarization-dependent transmission of NIR light.

Graphical abstract: Anisotropic optical properties of oriented silver nanorice and nanocarrots in stretched polymer films

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Publication details

The article was received on 20 Mar 2015, accepted on 15 Apr 2015 and first published on 16 Apr 2015


Article type: Paper
DOI: 10.1039/C5NR01782C
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Citation: Nanoscale, 2015,7, 8858-8863
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    Anisotropic optical properties of oriented silver nanorice and nanocarrots in stretched polymer films

    X. Tong, H. Liang, Y. Liu, L. Tan, D. Ma and Y. Zhao, Nanoscale, 2015, 7, 8858
    DOI: 10.1039/C5NR01782C

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