Understanding and Reducing Photothermal Forces for the Fabrication of Au Nanoparticle Dimers by Optical Printing
File(s)
Accepted version
Author(s)
Type
Journal Article
Abstract
Optical printing holds great potential to enable the use of the vast variety of colloidal nanoparticles (NPs) in nano- and microdevices and circuits. By means of optical forces, it enables the direct assembly of NPs, one by one, onto specific positions of solid surfaces with great flexibility of pattern design and no need of previous surface patterning. However, for unclear causes it was not possible to print identical NPs closer to each other than 300 nm. Here, we show that the repulsion restricting the optical printing of close by NPs arises from light absorption by the printed NPs and subsequent local heating. By optimizing heat dissipation, it is possible to reduce the minimum separation between NPs. Using a reduced graphene oxide layer on a sapphire substrate, we demonstrate for the first time the optical printing of Au—Au NP dimers. Modeling the experiments considering optical, thermophoretic, and thermo-osmotic forces we obtain a detailed understanding and a clear pathway for the optical printing fabrication of complex nano structures and circuits based on connected colloidal NPs.
Date Issued
2017-08-14
Date Acceptance
2017-08-09
Citation
NANO LETTERS, 2017, 17 (9), pp.5747-5755
ISSN
1530-6984
Publisher
American Chemical Society
Start Page
5747
End Page
5755
Journal / Book Title
NANO LETTERS
Volume
17
Issue
9
Copyright Statement
© 2017 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.nanolett.7b02713
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000411043500084&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Plasmonics
optical forces
thermo-osmosis
thermophoresis
colloidal patterning
reduced graphene oxide
graphene
GOLD NANOPARTICLES
FLUORESCENCE ENHANCEMENT
METALLIC NANOPARTICLE
SILVER NANOPARTICLES
SELECTIVE DEPOSITION
GRAPHENE
THERMOPHORESIS
PARTICLES
NANORODS
MANIPULATION
MD Multidisciplinary
Publication Status
Published