Achieving Continuous Sub-100-nm Plasmonic Nanowires as Long as Centimeters
Xinping Zhang*, Zhaoguang Pang, Hongmei Liu and Tianrui Zhai
Institute of Information Photonics Technology and College of Applied Sciences, Beijing University of Technology, Beijing 100124, China
- *Corresponding Author:
- Dr. Xinping Zhang
Institute of Information Photonics Technology and College of Applied Sciences
Beijing University of Technology
Beijing 100124, China
E mail: [email protected]
Received Date: September 01, 2011; Accepted Date: October 08, 2011; Published Date: October 10, 2011
Citation: Zhang X, Pang Z, Liu H, Zhai T (2011) Achieving Continuous Sub-100-nm Plasmonic Nanowires as Long as Centimeters. J Nanomedic Nanotechnol 6:273. doi:10.4172/2157-7439.1000273
Copyright: © 2011 Zhang X, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Gold nanowires with a width smaller than 100nm and a length in the order of centimeters have been fabricated using colloidal gold nanoparticles. The dewetting of the colloidal solution of gold nanoparticles on the photoresist master grating with a small duty cycle is utilized to limit the amount of gold nanoparticles that are confined into the grating grooves after spin-coating, which favors the achievement of narrow gold nanowires. During the subsequent annealing process, the sublimation of the ligands covering the gold nanoparticles, the melting of the gold nanoparticles, and the removal of the photoresist master grating take place sequentially as the annealing temperature is increased from room temperature to about 450ºC. Thus, high-quality gold nanowires are produced with excellent continuity in a large scale and excellent plasmonic response. These kinds of structures are important for sensitive biosensors with flexible dynamics in both the dimensions and the spectroscopic response.