Morphology Effects of Cap-shaped Silver Nanoparticle Films as a SERS Platform
Morphology Effects of Cap-shaped Silver Nanoparticle Films as a SERS Platform
复制标题
DOI：
10.2116/analsci.32.287
复制
发表时间：
2016-03-01
影响因子：
1.6
通讯作者：
Okamoto, Takayuki
中科院分区：
文献类型：
--
作者：
Takei, Hiroyuki;Okamoto, Takayuki
在本文中，我们评估了随机吸附的帽状银纳米粒子的应用，表面增强拉曼光谱，Sers。它们是通过沉积银在表面吸附的单分散二氧化硅纳米球的顶部，以类似于在纳米球上制备金属膜的方法，MFON，但一个主要的区别在于，纳米球是随机吸附，而不是作为一个紧密堆积的MFON的事实。利用随机MFON，可以掺入具有多于一种尺寸的纳米球。已经发现混合增加Sers性能。更具体地说，通过使用50和100 nm的纳米球，我们发现含有这两种类型的基材优于由100%的50或100 nm的纳米球制备的基材。如通过分光光度法评估的，这种增加不能归因于在Sers测量的照射波长处的基底的消光系数的增加。
In this paper, we evaluate randomly adsorbed cap-shaped silver nanoparticles for applications to surface-enhanced Raman spectroscopy, SERS. They were prepared by depositing silver on top of surface-adsorbed monodisperse SiO2 nanospheres, in a manner similar to the method for preparing metal film on nanosphere, MFON, but one major difference lies in the fact that nanospheres are randomly adsorbed rather than as a close-packed MFON. With random MFON, it is possible to incorporate nanospheres with more than one size. Mixing has been found to increase SERS performance. More specifically, by using 50 and 100 nm nanospheres, we found that substrates containing both types outperform substrates prepared from 100% of either 50 or 100 nm nanospheres. As evaluated by spectrophotometry, this increase could not be attributed to an increase in the extinction coefficient of the substrate at the irradiation wavelength of SERS measurements.