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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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Article information


Submitted
20 Mar 2015
Accepted
15 Apr 2015
First published
16 Apr 2015

Nanoscale, 2015,7, 8858-8863
Article type
Paper
Author version available

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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