Design of Plasmon Resonance Shifts by the Galvanic Replacement Degree of Au-Ag Nanozappers

Hung Chi Yen; Man Nung Su; You Cheng Liu; Ming Wei Lee; Yae Lin Sheu; Liang Yan Hsu; Chia Chun Chen

doi:10.1021/acs.jpcc.9b08167

Design of Plasmon Resonance Shifts by the Galvanic Replacement Degree of Au-Ag Nanozappers

Hung Chi Yen, Man Nung Su, You Cheng Liu, Ming Wei Lee, Yae Lin Sheu, Liang Yan Hsu^*, Chia Chun Chen

^*Corresponding author for this work

Department of Chemistry

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Porous plasmonic nanostructures have attracted interest for their built-in cavities, which provide strong localized electric field enhancement and additional plasmon tunability. In this work, we synthesize a series of nanostructures based on Au-Ag nanozappers (similar to a bug zapper in shape and in function of catching photon with the frame) by means of progressive galvanic replacement reactions. Transmission electron microscopy images present evidence that the cavity size of the Au-Ag nanozapper is controllable. Moreover, our synthetic method enables us to design the longitudinal plasmon modes of the Au-Ag nanozappers progressively varied from 660 to 970 nm with nearly the same aspect ratio. To explore the origin of the spectral shift, we analyze the size, the composition, and the void effects of the Au-Ag nanozappers using computational electrodynamics simulations. Our analysis indicates that the longitudinal plasmon modes are less sensitive to the frame composition of the nanozappers, in contrast to their susceptibility to the size and the void effects.

Original language	English
Pages (from-to)	29298-29305
Number of pages	8
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	48
DOIs	https://doi.org/10.1021/acs.jpcc.9b08167
Publication status	Published - 2019 Dec 5

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Design of Plasmon Resonance Shifts by the Galvanic Replacement Degree of Au-Ag Nanozappers",

abstract = "Porous plasmonic nanostructures have attracted interest for their built-in cavities, which provide strong localized electric field enhancement and additional plasmon tunability. In this work, we synthesize a series of nanostructures based on Au-Ag nanozappers (similar to a bug zapper in shape and in function of catching photon with the frame) by means of progressive galvanic replacement reactions. Transmission electron microscopy images present evidence that the cavity size of the Au-Ag nanozapper is controllable. Moreover, our synthetic method enables us to design the longitudinal plasmon modes of the Au-Ag nanozappers progressively varied from 660 to 970 nm with nearly the same aspect ratio. To explore the origin of the spectral shift, we analyze the size, the composition, and the void effects of the Au-Ag nanozappers using computational electrodynamics simulations. Our analysis indicates that the longitudinal plasmon modes are less sensitive to the frame composition of the nanozappers, in contrast to their susceptibility to the size and the void effects.",

author = "Yen, {Hung Chi} and Su, {Man Nung} and Liu, {You Cheng} and Lee, {Ming Wei} and Sheu, {Yae Lin} and Hsu, {Liang Yan} and Chen, {Chia Chun}",

note = "Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

year = "2019",

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doi = "10.1021/acs.jpcc.9b08167",

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AU - Yen, Hung Chi

AU - Su, Man Nung

AU - Liu, You Cheng

AU - Lee, Ming Wei

AU - Sheu, Yae Lin

AU - Hsu, Liang Yan

AU - Chen, Chia Chun

PY - 2019/12/5

Y1 - 2019/12/5

N2 - Porous plasmonic nanostructures have attracted interest for their built-in cavities, which provide strong localized electric field enhancement and additional plasmon tunability. In this work, we synthesize a series of nanostructures based on Au-Ag nanozappers (similar to a bug zapper in shape and in function of catching photon with the frame) by means of progressive galvanic replacement reactions. Transmission electron microscopy images present evidence that the cavity size of the Au-Ag nanozapper is controllable. Moreover, our synthetic method enables us to design the longitudinal plasmon modes of the Au-Ag nanozappers progressively varied from 660 to 970 nm with nearly the same aspect ratio. To explore the origin of the spectral shift, we analyze the size, the composition, and the void effects of the Au-Ag nanozappers using computational electrodynamics simulations. Our analysis indicates that the longitudinal plasmon modes are less sensitive to the frame composition of the nanozappers, in contrast to their susceptibility to the size and the void effects.

AB - Porous plasmonic nanostructures have attracted interest for their built-in cavities, which provide strong localized electric field enhancement and additional plasmon tunability. In this work, we synthesize a series of nanostructures based on Au-Ag nanozappers (similar to a bug zapper in shape and in function of catching photon with the frame) by means of progressive galvanic replacement reactions. Transmission electron microscopy images present evidence that the cavity size of the Au-Ag nanozapper is controllable. Moreover, our synthetic method enables us to design the longitudinal plasmon modes of the Au-Ag nanozappers progressively varied from 660 to 970 nm with nearly the same aspect ratio. To explore the origin of the spectral shift, we analyze the size, the composition, and the void effects of the Au-Ag nanozappers using computational electrodynamics simulations. Our analysis indicates that the longitudinal plasmon modes are less sensitive to the frame composition of the nanozappers, in contrast to their susceptibility to the size and the void effects.

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Design of Plasmon Resonance Shifts by the Galvanic Replacement Degree of Au-Ag Nanozappers

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ASJC Scopus subject areas

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