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year 28, Issue 2 (ICOP & ICPET 2022 2022)
ICOP & ICPET _ INPC _ ICOFS 2022, 28(2): 804-807 |
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noori A, Bahreini M, aref , S H. The impact of tip material and coating on electric field enhancement of tip-enhanced Raman spectroscopy (TERS). ICOP & ICPET _ INPC _ ICOFS 2022; 28 (2) :804-807
URL: http://opsi.ir/article-1-2709-en.html
URL: http://opsi.ir/article-1-2709-en.html
Abstract: (715 Views)
In this paper, the finite difference time domain (FDTD) method is used to estimate the intensity and distribution of localized electric field enhancement in tip-enhanced Raman spectroscopy (TERS) in the vicinity of a conical tip with a diameter of 10 nm. The effect of using different tip materials in the vicinity of the substrate and also the effect of different tip coatings on the amount of electric field enhancement have been investigated. Tips in our TERS systems are made of materials such as gold, silver, aluminum and silicon, as well as a combination of these materials as coatings. Our simulation results show that the maximum enhancement produced with gold coating and substrate; and the lower the extinction coefficient of the metal material, the more electric field enhancement is created.
Keywords: Electric Field Enhancement, Finite Difference Time Domain, Raman Spectroscopy, Tip-Enhanced Raman Spectroscopy.
Type of Study: Experimental |
Subject:
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