Discrete Dipole Approximation Calculation of the Extinction Spectra of Gold-Silver Alloy Nanoparticles 


Vol. 51,  No. 2, pp. 136-140, Apr.  2007
10.5012/jkcs.2007.51.2.136


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  Abstract

이산 쌍극자 근사를 이용하여 수용액상의 금-은 합금 나노입자의 표면 플라즈몬 공명 스펙트럼을 계산하였다. 직경 10 나노미터의 금-은 합금 입자의 경우에 스펙트럼의 최대 소광 파장이 합금의 은 성분이 높아짐에 따라 선형적으로 짧은 파장대로 이동하며 최대 소광 세기는 지수적으로 증가함을 관측하였다. 이러한 계산결과는 실험 결과들과 잘 일치하는 것을 확인하였다. By using the discrete-dipole approximation, we computed the extinction spectrum of a gold-silver alloy nanoparticle. We have examined how the surface plasmon resonance changes with respect to the variation in the composition of the alloy particle. As the fraction of silver increases for a 10nm particle, the peak position of the extinction spectrum blue-shifts linearly. The intensity of the peak however increases exponentially with increasing the silver fraction. These results are in accord with the previous experimental results.

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  Cite this article

[IEEE Style]

H. Lee, S. L. Chandra, J. Jang, "Discrete Dipole Approximation Calculation of the Extinction Spectra of Gold-Silver Alloy Nanoparticles," Journal of the Korean Chemical Society, vol. 51, no. 2, pp. 136-140, 2007. DOI: 10.5012/jkcs.2007.51.2.136.

[ACM Style]

Heemi Lee, Saha Leton Chandra, and Joonkyung Jang. 2007. Discrete Dipole Approximation Calculation of the Extinction Spectra of Gold-Silver Alloy Nanoparticles. Journal of the Korean Chemical Society, 51, 2, (2007), 136-140. DOI: 10.5012/jkcs.2007.51.2.136.

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ISSN(Print) 1017-2548
ISSN(Online) 2234-8530