Fabrication of Ag-Au bimetallic nanoparticles by laser-induced dewetting of bilayer films

Yoonseok Oh, Jeeyoung Lee, Myeongkyu Lee

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

We here show that Ag-Au bimetallic nanoparticles (NPs) can be produced by dewetting an Ag/Au bilayer film coated on glass using a nanosecond-pulsed laser beam. Elemental analysis revealed that the obtained bimetallic NPs are Ag-Au alloys, with two elements well mixed over the whole volume of the particle. The composition of the produced particles was controllable by changing the relative thickness of each layer. The localized surface plasmon resonance (LSPR) peak was red-shifted with an increasing Au content and the LSPR wavelength could be tuned from 415 to 525 nm by varying the alloy composition. A film area of several square centimeters could be transformed into Ag-Au NPs by a single laser pulse of 6 ns duration. This study provides a facile and scalable route to prepare bimetallic NPs for plasmonic and other applications.

Original languageEnglish
Pages (from-to)1293-1299
Number of pages7
JournalApplied Surface Science
Volume434
DOIs
Publication statusPublished - 2018 Mar 15

Fingerprint

Nanoparticles
Fabrication
Lasers
Surface plasmon resonance
Chemical analysis
Pulsed lasers
Laser beams
Laser pulses
Glass
Wavelength

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

Cite this

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abstract = "We here show that Ag-Au bimetallic nanoparticles (NPs) can be produced by dewetting an Ag/Au bilayer film coated on glass using a nanosecond-pulsed laser beam. Elemental analysis revealed that the obtained bimetallic NPs are Ag-Au alloys, with two elements well mixed over the whole volume of the particle. The composition of the produced particles was controllable by changing the relative thickness of each layer. The localized surface plasmon resonance (LSPR) peak was red-shifted with an increasing Au content and the LSPR wavelength could be tuned from 415 to 525 nm by varying the alloy composition. A film area of several square centimeters could be transformed into Ag-Au NPs by a single laser pulse of 6 ns duration. This study provides a facile and scalable route to prepare bimetallic NPs for plasmonic and other applications.",
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Fabrication of Ag-Au bimetallic nanoparticles by laser-induced dewetting of bilayer films. / Oh, Yoonseok; Lee, Jeeyoung; Lee, Myeongkyu.

In: Applied Surface Science, Vol. 434, 15.03.2018, p. 1293-1299.

Research output: Contribution to journalArticle

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