High performance SERS platforms via parametric optimization of the laser-assisted photodeposition of silver and gold nanoparticles

Parametric optimization of the laser-assisted photocatalytic growth of Ag and Au nanoparticles for high SERS enhancement factor performance informed by design of experiment is demonstrated. The photodeposition process was divided into two phases –seeding and growth– in order to achieve the highest p...

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Bibliographic Details
Published inOptical materials express Vol. 11; no. 9; p. 3079
Main Authors Hoffmann, Manuel, Wackerow, Stefan, Abdolvand, Amin, Zolotovskaya, Svetlana A.
Format Journal Article
LanguageEnglish
Published Washington Optical Society of America 01.09.2021
Subjects
Broadband
Design of experiments
Gold
Lasers
Nanoparticles
Nanostructure
Optimization
Silver
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Summary:Parametric optimization of the laser-assisted photocatalytic growth of Ag and Au nanoparticles for high SERS enhancement factor performance informed by design of experiment is demonstrated. The photodeposition process was divided into two phases –seeding and growth– in order to achieve the highest possible nanoparticle surface coverage for the size range from 10 to 100 nm. A substantial difference in the parameter effects between the Ag and Au seeding and growth was found. The SERS performance of the photodeposited Ag and Au nanostructures was evaluated at 532, 633 and 785 nm with thiophenol as a probe molecule. A high-enhancement broadband SERS operation was attained with Ag nanostructure grown at high laser fluences. The SERS enhancement factors of 10 5 were achieved with both Ag and Au nanostructures.
ISSN:2159-3930
2159-3930
DOI:10.1364/OME.437900