Abstract
A surface-enhanced Raman scattering (SERS) active structure allows the highly sensitive imaging of label-free molecular trace. A gold nanostructure with boehmite as a skeleton was fabricated by the inclined magnetron sputtering method. The characteristics of the prepared SERS imaging plate consisting of gold nanostructure on boehmite were evaluated as the follows. The distance dependence of the SERS intensity of 4,4′-bipyridine from the edge of the substrate indicated that the larger the SERS intensity becomes as the closer the distance approaches the substrate edged where the gold nanolayer was thicker. The trend of SERS dependence on distance was more pronounced at higher concentration of molecule and less pronounced at lower concentration. Using the SERS imaging plate will enable the further demonstration of ultrasenstive detection of chemical and biological molecules as environmental contaminants within a broad range of common fluidics for potential applications related to analytical chemistry and environmental monitoring.
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