In order to make the best of the surface enhancing behaviors of metal nanostructures for Raman Scattering, a tactful balance should be found between signal enhancement, the distribution uniformity of ‘hot spots’ and the reproducibility of nanostructure patterned substrates, which should generally be testified by simulation and experiment. This paper simulated and compared the Raman enhancements produced from a variety of nanoparticle covered SERS substrates with different sizes and spaces, and it was concluded that the distance between the nanoparticles plays a contradictory role on the enhancement factor and the uniformity of the ‘hot spots’, and so it should be selected with comprehensive consideration.
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The work was supported by the National Natural Science Foundation of China (No. 51205245), Science and Technology Commission of Shanghai Municipality (No. 11PJ1403500), and Innovation Program of Shanghai Municipal Education Commission (No. 12YZ022).
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