High-density silver nanoparticle film with temperature-controllable interparticle spacing for a tunable surface enhanced Raman scattering substrate

被引：691
作者：
Lu, Y [1 ]
Liu, GL [1 ]
Lee, LP [1 ]
机构：
[1] Univ Calif Berkeley, Dept Bioengn, Berkeley Sensor & Actuator Ctr, Berkeley, CA 94720 USA
来源：
NANO LETTERS | 2005年 / 5卷 / 01期
关键词：
D O I：
10.1021/nl048965u
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The formation of high-density silver nanoparticles and a novel method to precisely control the spacing between nanoparticles by temperature are demonstrated for a tunable surface enhanced Raman scattering substrates. The high-density nanoparticle thin film is accomplished by self-assembling through the Langmuir-Blodgett (LB) technique on a water surface and transferring the particle monolayer to a temperature-responsive polymer membrane. The temperature-responsive polymer membrane allows producing a dynamic surface enhanced Raman scattering substrate. The plasmon peak of the silver nanoparticle film red shifts up to 110 nm with increasing temperature. The high-density particle film serves as an excellent substrate for surface-enhanced Raman spectroscopy (SERS), and the scattering signal enhancement factor can be dynamically tuned by the thermally activated SERS substrate. The SERS spectra of Rhodamine 6G on a high-density silver particle film at various temperatures is characterized to demonstrate the tunable plasmon coupling between high-density nanoparticles.
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收藏
页码：5 / 9
页数：5
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