生物分子
拉曼散射
细胞质
纳米颗粒
化学
拉曼光谱
生物物理学
激光器
激发
材料科学
纳米技术
生物化学
光学
生物
物理
电气工程
工程类
作者
Simona Cîntă Pînzaru,Luisa Andronie,I. Domsa,O. Cozar,Simion Aștilean
摘要
Abstract In order to get insight into the chemical heterogeneities of solid tumors, here we report the first surface‐enhanced Raman scattering (SERS) experiment from normal and altered epithelial layer in human colon carcinoma tissues. The Ag colloidal nanoparticles that can be incorporated into the interstitial space in solid tumors or those penetrating into cytoplasm or nucleus of many cells allowed high quality SERS signal. Different tissue structures of tumor and normal colon have characteristic features in SERS spectra. Prominent SERS features of malignant tissue spectra are related to the strong enhancement of the bands preponderantly attributable to DNA or RNA bases. The preliminary studies demonstrate that it is possible to probe Ag colloidal nanoparticles adsorption onto the tissue resulting in a strong molecular signaling with high specificity and rapid acquisition time using visible laser line excitation. Copyright © 2008 John Wiley & Sons, Ltd.
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