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Nanoscale control of molecular self-assembly induced by plasmonic hot-electron dynamics

Title: Nanoscale control of molecular self-assembly induced by plasmonic hot-electron dynamics
Authors: Simoncelli, S
Li, Y
Cortés, E
Maier, SA
Item Type: Journal Article
Abstract: Self-assembly processes allow designing and creating complex nanostructures using molecules as building blocks and surfaces as scaffolds. This autonomous driven construction is possible due to a complex thermodynamic balance of molecule-surface interactions. As such, nanoscale guidance and control over this process is hard to achieve. Here we use the highly localized light-to-chemical-energy conversion of plasmonic materials to spatially cleave Au-S bonds on predetermined locations within a single nanoparticle, enabling a high degree of control over this archetypal system for molecular self-assembly. Our method offers nanoscale precision and high-throughput light-induced tailoring of the surface chemistry of individual and packed nanosized metallic structures by simply varying wavelength and polarization of the incident light. Assisted by single-molecule super-resolution fluorescence microscopy, we image, quantify, and shed light onto the plasmon-induced desorption mechanism. Our results point toward localized distribution of hot electrons, contrary to uniformly distributed lattice heating, as the mechanism inducing Au-S bond breaking. We demonstrate that plasmon-induced photodesorption enables subdiffraction and even subparticle multiplexing. Finally, we explore possible routes to further exploit these concepts for the selective positioning of nanomaterials and the sorting and purification of colloidal nanoparticles.
Issue Date: 18-Jan-2018
Date of Acceptance: 18-Jan-2018
URI: http://hdl.handle.net/10044/1/56596
DOI: https://dx.doi.org/10.1021/acsnano.7b08563
ISSN: 1936-0851
Publisher: American Chemical Society
Start Page: 2184
End Page: 2192
Journal / Book Title: ACS Nano
Volume: 12
Issue: 3
Copyright Statement: Copyright © 2018 American Chemical Society
Sponsor/Funder: Engineering & Physical Science Research Council (E
Funder's Grant Number: EP/M013812/1
Keywords: Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Chemistry
Science & Technology - Other Topics
Materials Science
plasmonics
hot electrons
super-resolution
dynamic self-assembly
multiplexing
nanoscale precision
GOLD
MONOLAYERS
NANOSTRUCTURES
NANOPARTICLES
INTERFACE
SURFACES
LOCALIZATION
FLUORESCENCE
CHEMISTRY
MECHANISM
cond-mat.mes-hall
MD Multidisciplinary
Publication Status: Published
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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