| 摘要 |
<p>A surface-enhanced Raman substrate, a preparation method, a Raman spectrometer, a detection method, and a fine-tuning device. The substrate employs a precious metal surface enhancement layer (2) formed directly onto a frosted glass (1) having a roughness of a micron order of magnitude, obviates the need for forming an etching surface on a base layer, and obviates the need for roughening a precious metal layer, where the substrate formed also is provided with great enhancement effect and ultra-high analytical sensitivity, and is applicable in the detection of ultra-trace samples. The nanoparticle substrate employs a scheme of inert-gas protection and preservation. The Raman spectrometer implements a single light source and dual light path excitation, while at the same time, is capable of effectively receiving at a focusing lens (a convex lens) (17) Raman spectrums that are forward scattered by a sample excited by a laser collected in a solid angle, and, under the premise that a light source of an existing Raman spectrometer is not changed, increases the utilization rate of an excitation light, and fully utilizes the excitation energy. Also, the detection method provides a high reproducibility and ultra-high analytical sensitivity, and is applicable in the detection of the ultra-trace samples.</p> |
