Department of Chemistry and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA.
ACS Nano. 2010 Dec 28;4(12):7676-82. doi: 10.1021/nn102495f. Epub 2010 Nov 11.
This paper describes a new strategy for synthesizing free-standing bimetallic nanorings and nanoring arrays based upon on-wire lithography and a galvanic replacement reaction. The strategy allows one to tune the diameter, length, and therefore aspect ratio of the nanorings. In addition, it can be used to produce arrays of nanorings in high yield with control over number and spacing. Spectroscopic studies and discrete dipole approximation calculations show that nanoring dimers exhibit greater surface enhanced Raman scattering than the analogous nanodisk dimers.
本文提出了一种基于线上光刻和电替换反应合成独立双金属纳米环和纳米环阵列的新策略。该策略可调节纳米环的直径、长度，从而控制其纵横比。此外，它还可用于高产率制备纳米环阵列，并可控制其数量和间距。光谱研究和离散偶极子近似计算表明，纳米环二聚体比类似的纳米盘二聚体具有更强的表面增强拉曼散射。
