Large Area Nanostructured Arrays: Optical Properties of Metallic Nanotubes
详细信息 查看全文
- 作者：Katja Fr枚hlich ; Pejman Hojati-Talemi ; Matthew Bishop ; Kamil Zuber ; Peter Murphy ; Drew Evans
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：May 8, 2013
- 年：2013
- 卷：5
- 期：9
- 页码：3937-3942
- 全文大小：318K
- 年卷期：v.5,no.9(May 8, 2013)
- ISSN：1944-8252
文摘
In this study, large area metallic nanotube arrays on flexible plastic substrates are produced by templating the growth of a cosputtered alloy using anodized aluminum oxide membranes. These nanotube arrays are prepared over large areas (ca. squared centimeters) by reducing the residual stress within the thin multilayered structure. The nanotubes are approximately 20 nm in inner diameter, having walls of <10 nm in thickness, and are arranged in a close packed configuration. Optically the nanotube arrays exhibit light trapping behavior (not plasmonic), where the reflectivity is less than 15% across the visible spectra compared to >40% for a flat sample using the same alloy. When the nanotubes are exposed to high relative humidity, they spontaneously fill, with a concomitant change in their visual appearance. The filling of the nanotubes is confirmed using contact angle measurements, with the nanotubes displaying a strong hydrophilic character compared to the weak behavior of the flat sample. The ability to easily fabricate large area nanotube arrays which display exotic behavior paves the way for their uptake in real world applications such as sensors and solar energy devices.