摘要
Raman spectroscopy is a powerful technique in chemical information characterization. However, this spectral method is subject to two obstacles in nano-material detection. One is diffraction limited spatial resolution, and the other is its inherent small Raman cross section and weak signaling. To resolve these problems, a new approach has been developed, denoted as tip-enhanced Raman spectroscopy (TERS). TERS is capable of high-resolution and high-sensitivity detection and demonstrated to be a promising spectroscopic and micro-topographic method to characterize nano-materials and nanostructures. In this paper, the principle and experimental system of TERS are discussed. The latest application of TERS in molecule detection, biological specimen identification, nanao-material characterization, and semi-conductor material determination with some specific experimental examples are presented.
Raman spectroscopy is a powerful technique in chemical information characterization. However, this spectral method is sub- ject to two obstacles in nano-material detection. One is diffraction limited spatial resolution, and the other is its inherent small Raman cross section and weak signaling. To resolve these problems, a new approach has been developed, denoted as tip-enhanced Raman spectroscopy （TERS）. TERS is capable of high-resolution and high-sensitivity detection and demonstrat- ed to be a promising spectroscopic and micro-topographic method to characterize nano-materials and nanostructures. In this paper, the principle and experimental system of TERS are discussed. The latest application of TERS in molecule detection, bi- ological specimen identification, nanao-material characterization, and senti-conductor material determination with some spe- cific experimental examples are presented.
基金
supported by the National Natural Science Foundation of China (Grant No. 60427003)
the National Basic Research Program of China, Project Research on Optical Detection in Nanometric Scale (Grant No. 2007CB936801)
