Evans P R, Hendren W R, Atkinson R, Pollard R J
Centre for Nanostructured Media, School of Mathematics and Physics, Queen's University of Belfast, University Road, Belfast BT7 1NN, UK.
Nanotechnology. 2008 Nov 19;19(46):465708. doi: 10.1088/0957-4484/19/46/465708. Epub 2008 Oct 22.
Silver nanorods have been grown by electrodeposition into thin film porous alumina. Transmission measurements show two peaks related to the transverse and longitudinal resonance of the nanorods. The behaviour of the longitudinal resonance peak is found to vary with nanorod length and the spectral position to depend on nanorod diameter. As the distance between the nanorods is decreased a small blue-shift of the longitudinal peak is observed. Depositing a small gold cap on top of the silver nanorods causes a red-shift of the longitudinal peak whilst, conversely, the longitudinal peak of gold nanorod arrays is comparatively insensitive to the deposition of a silver cap. Gold-silver alloy nanorods were also deposited from a mixed salt bath and a linear dependence of the transverse peak position on alloy composition was observed.
通过电沉积法在薄膜多孔氧化铝中生长出了银纳米棒。透射测量显示出与纳米棒横向和纵向共振相关的两个峰。发现纵向共振峰的行为随纳米棒长度而变化，且光谱位置取决于纳米棒直径。随着纳米棒之间距离的减小，观察到纵向峰有小的蓝移。在银纳米棒顶部沉积一个小金帽会导致纵向峰红移，相反，金纳米棒阵列的纵向峰对银帽的沉积相对不敏感。还从混合盐浴中沉积了金银合金纳米棒，并观察到横向峰位置与合金成分呈线性关系。
