Abstract
Wheat leaf is a natural material having abundant gaps between micro-protrusions and flat structures. Magnetron sputtering method is used to sputter Ag film on wheat leaves and Rhodamine 6G (R6G) is used to detect the SERS difference caused by different structures of the same material. The SERS signal shows that the Raman intensity of the micro-protrusions is stronger than that of the flat parts. The results shows that there are more gaps in the protrusion structure per unit area, thereby providing more “hot spots”, which plays an important role in improving the SERS signal. Therefore, this low-cost and high-performance SERS system shows excellent application prospects and provides a new idea to improve SERS signal by using natural biomaterials as SERS substrate.
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