Sensitivity Of Triangular Hybrid Au-Ag Nanostructure Array

Amer Scientific Publishers
Publication Type:
Journal Article
Journal of Computational and Theoretical Nanoscience, 2010, 7 (8), pp. 1347 - 1350
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The sensitivity is one of the most important parameters in the sensing field. Silver triangular nanostructure array is the traditional substrate for detecting the targets. In this paper, we proposed triangular hybrid AuAg nanostructure array to be optimized substrate for nanobiosensor. Effort was made to study sensitivity of triangular hybrid AuAg nanostructure array through finite-difference time-domain (FDTD) algorithm-based computational numerical calculation method. The extinction efficiency was obtained by theoretical numerical calculation. It is found that the triangular hybrid AuAg nanostructure array possess the refractive index sensitivity of 273 nm/RIU when thickness of silver is 40 nm and the gold is 10 nm, and refractive index of the medium is around 1.33. It is higher than the pure silver nanostructure array (242 nm/RIU).
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