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Au–Ag Alloy Nanoporous Nanotubes
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Metallic nanostructures with hollow interiors or tailored porosity represent a special class of attractive materials with intriguing chemicophysical properties. This paper presents the fabrication of a new type of metallic nanoporous nanotube structure based on a facile and effective combination of nanocrystal growth and surface modification. By controlling the individual steps involved in this process, such as nanowire growth, surface modification, thermal diffusion, and dealloying, one-dimensional (1-D) metallic nanostructures can be prepared with tailored structural features and pre-designed functionalities. These tubular and porous nanostructures show distinct optical properties, such as tunable absorption in the near-infrared region, and enhanced capability for electrochemiluminescence signal amplification, which make them particularly desirable as novel 1-D nano-carriers for biomedical, drug delivery and sensing applications.
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Au–Ag Alloy Nanoporous Nanotubes
)
Abstract
Metallic nanostructures with hollow interiors or tailored porosity represent a special class of attractive materials with intriguing chemicophysical properties. This paper presents the fabrication of a new type of metallic nanoporous nanotube structure based on a facile and effective combination of nanocrystal growth and surface modification. By controlling the individual steps involved in this process, such as nanowire growth, surface modification, thermal diffusion, and dealloying, one-dimensional (1-D) metallic nanostructures can be prepared with tailored structural features and pre-designed functionalities. These tubular and porous nanostructures show distinct optical properties, such as tunable absorption in the near-infrared region, and enhanced capability for electrochemiluminescence signal amplification, which make them particularly desirable as novel 1-D nano-carriers for biomedical, drug delivery and sensing applications.
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Acknowledgements
We thank Wei Liu, Qin Hao, Zhicheng Jü, and Prof.Wenrui Jin for their assistance in making Ag nanowires and in conducting the ECL experiments. This work was supported by the National 863 (2006AA03Z222) and 973(2007CB936602) Program Projects of China, the Natural Science Foundation of Shandong Province (2007ZRB01117, 2006BS04018), and the Key Project of the Ministry of Education of China (108078).Y.D.is a Tai-Shan Scholar supported by the SEM-NCET, and SRF-ROCS Programs and the Shandong Natural Science Fund for Distinguished Young Scholars.
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