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  Thermal dynamics of pulsed-laser excited gold nanorods in suspension

Plech, A., Ibrahimkutty, S., Reich, S., & Newby, G. (2017). Thermal dynamics of pulsed-laser excited gold nanorods in suspension. Nanoscale, 9(44), 17284-17292.

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 Creators:
Plech, A., Author
Ibrahimkutty, S.1, Author
Reich, S., Author
Newby, G., Author
Affiliations:
1Max Planck Society, ou_persistent13              

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 Abstract: Photothermal reactions of metallic nanostructures, such as gold nanorods show appealing structural relaxations, such as bubble formation or particle modification. We have employed a pump-probe method to record the structural relaxations of a suspension of gold nanorods upon femtosecond laser excitation by pulsed X-ray scattering both with wide-angle and small-angle sensitivity. Single-pulse reactions include transient bubble formation at 20 J m(-2) and irreversible nanorod reshaping at 30 J m(-2). Thus the window for reversible excitation is very narrow. Additionally we could map the time-domain and fluence behaviour in a wide range to characterize the relaxations comprehensively. The polarized laser pulse first selectively excites nanorods aligned with the laser electric field, but at higher fluence non-aligned rods are also transformed. At low fluence this transformation happens in the solid state, while at higher fluence the rods melt.

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Language(s): eng - English
 Dates: 2017
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 735148
ISI: 000415666500017
 Degree: -

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Title: Nanoscale
Source Genre: Journal
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Publ. Info: CAMBRIDGE : ROYAL SOC CHEMISTRY
Pages: - Volume / Issue: 9 (44) Sequence Number: - Start / End Page: 17284 - 17292 Identifier: ISSN: 2040-3364