Investigation of surface plasmon resonance in bimetallic Au-Ag alloys nanorod-shaped based on linear-weight calculation

M. K. Muhammad Sujak, Miftahussurur Hamidi Putra, Dede Djuhana

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

Noble metals (Au and Ag) are the primary raw materials which have vast potential application ranging from across biosensor, biomedicine, science, and engineering fundamental. However, alloying them will enhance the efficiency and applicability of noble metals. Employing the linear-weight (LW) technique to construct a dielectric function of a binary solution is still disputed. However, this method is still widely used to examine Localized Surface Plasmon Resonance (LSPR) of Au-Ag binary solution. In this work, the calculation of electromagnetic response such as Localized Surface Plasmon Resonance (LSPR) of bimetallic Au-Ag nanorod was performed by means of MNPBEM package. We utilized nanorod-shaped with two different excitation modes, namely, Transverse Mode (TM) and Longitudinal Mode (LM), and various compositions to investigate their LSPR shifting anomalies. Moreover, we employed the LW technique to construct their dielectric function and analyze the LSPR anomalies. Interestingly, we found that using LW approximation, the resonance peak of TM is separate into two peaks. These peaks originated from the free electron of Au and Ag respectively, however, some of LSPRs peak did not occur amongst peak of pure Au and Ag. Practically, using LW method the resonance peak should be located amongst their individual elements. This work has provided the limitation of using silver fraction and the related aspect ratios to predict the LSPR spectra of Au and Ag on nanorod-shaped.

Original languageEnglish
Title of host publicationProceedings of the 5th International Symposium on Frontier of Applied Physics, ISFAP 2019
EditorsMuhandis Shiddiq, Andri Hardiansyah, Witha Berlian Kesuma Putri, Yuliati Herbani, Edi Kurniawan, Deni Khaerudini, Ahmad Nugraha, Syuhada Syuhada, Hamzah Fauzi, Abdulloh Rifai, Edi Suprayoga, Anggito Tetuko, Toto Sudiro
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735420168
DOIs
Publication statusPublished - 3 Sep 2020
Event5th International Symposium on Frontier of Applied Physics, ISFAP 2019 - Tangerang Selatan, Indonesia
Duration: 23 Oct 201924 Oct 2019

Publication series

NameAIP Conference Proceedings
Volume2256
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th International Symposium on Frontier of Applied Physics, ISFAP 2019
CountryIndonesia
CityTangerang Selatan
Period23/10/1924/10/19

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