期刊
NANO LETTERS
卷 15, 期 8, 页码 5427-5437出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.5b01833
关键词
bimetallic; nanowires; gold; silver; synthesis; nanoplasmonics
类别
资金
- European Research Council [267867, 306686]
- Spanish MINECO [MAT2013-46101-R, MAT2014-59096-P]
- ERC [335078]
- European Union [312483, 262348]
- Elite Network Bavaria in the frame of the Elite Study Program Macromolecular Science
- ICREA Funding Source: Custom
Inspired by the concept of living polymerization reaction, we are able to produce silver-gold-silver nanowires with a precise control over their total length and plasmonic properties by establishing a constant silver deposition rate on the tips of penta-twinned gold nanorods used as seed cores. Consequently, the length of the wires increases linearly in time. Starting with similar to 210 nm x 32 nm gold cores, we produce nanowire lengths up to several microns in a highly controlled manner, with a small self-limited increase in thickness of similar to 4 nm, corresponding to aspect ratios above 100, whereas the low polydispersity of the product allows us to detect up to nine distinguishable plasmonic resonances in a single colloidal solution. We analyze the spatial distribution and the nature of the plasmons by electron energy loss spectroscopy and obtain excellent agreement between measurements and electromagnetic simulations, clearly demonstrating that the presence of the gold core plays a marginal role, except for relatively short wires or high-energy modes.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据