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Fast assembly of gold nanoparticles in large-area 2D nanogrids using a one-step, near-infrared radiation-assisted evaporation process

Fast assembly of gold nanoparticles in large-area 2D nanogrids using a one-step, near-infrared radiation-assisted evaporation process
Fast assembly of gold nanoparticles in large-area 2D nanogrids using a one-step, near-infrared radiation-assisted evaporation process
When fabricating photonic crystals from suspensions in volatile liquids using the horizontal deposition method, the conventional approach is to evaporate slowly to increase the time for particles to settle in an ordered, periodic close-packed structure. Here, we show that the greatest ordering of 10 nm aqueous gold nanoparticles (AuNPs) in a template of larger spherical polymer particles (mean diameter of 338 nm) is achieved with very fast water evaporation rates obtained with near-infrared radiative heating. Fabrication of arrays over areas of a few cm2 takes only 7 min. The assembly process requires that the evaporation rate is fast relative to the particles’ Brownian diffusion. Then a two-dimensional colloidal crystal forms at the falling surface, which acts as a sieve through which the AuNPs pass, according to our Langevin dynamics computer simulations. With sufficiently fast evaporation rates, we create a hybrid structure consisting of a two-dimensional AuNP nanoarray (or “nanogrid”) on top of a three-dimensional polymer opal. The process is simple, fast, and one-step. The interplay between the optical response of the plasmonic Au nanoarray and the microstructuring of the photonic opal results in unusual optical spectra with two extinction peaks, which are analyzed via finite-difference time-domain method simulations. Comparison between experimental and modeling results reveals a strong interplay of plasmonic modes and collective photonic effects, including the formation of a high-order stopband and slow-light-enhanced plasmonic absorption. The structures, and hence their optical signatures, are tuned by adjusting the evaporation rate via the infrared power density.
self-assembly, plasmonics, photonics, coupling, gold nanoparticles, inverse opal, evaporation, IR heating
1936-0851
1-11
Utgenannt, André
307e12a9-17bf-409f-8d14-f4f0f0d41481
Maspero, Ross
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Fortini, Andrea
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Turner, Rebecca
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Florescu, Marian
609ce4f2-26f9-4416-944e-b57bc94a1a3d
Jeynes, Christopher
c5cb37a1-b717-4709-bec0-9cc2dbf2b045
Kanaras, Antonios G.
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Muskens, Otto L.
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Sear, Richard P.
3b70fc9a-4e7e-49a4-b9c1-e307606c551c
Keddie, Joseph L.
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Utgenannt, André
307e12a9-17bf-409f-8d14-f4f0f0d41481
Maspero, Ross
0e5f73be-065d-4ba9-aa45-2ed7d3c39b1e
Fortini, Andrea
fd8e6539-d505-4cb8-95bd-15d8c41fc03b
Turner, Rebecca
cbfaf097-ced8-4b8a-b35b-a7f0a33bc5e1
Florescu, Marian
609ce4f2-26f9-4416-944e-b57bc94a1a3d
Jeynes, Christopher
c5cb37a1-b717-4709-bec0-9cc2dbf2b045
Kanaras, Antonios G.
667ecfdc-7647-4bd8-be03-a47bf32504c7
Muskens, Otto L.
2284101a-f9ef-4d79-8951-a6cda5bfc7f9
Sear, Richard P.
3b70fc9a-4e7e-49a4-b9c1-e307606c551c
Keddie, Joseph L.
27235923-f259-441c-9452-b9a571042cc8

Utgenannt, André, Maspero, Ross, Fortini, Andrea, Turner, Rebecca, Florescu, Marian, Jeynes, Christopher, Kanaras, Antonios G., Muskens, Otto L., Sear, Richard P. and Keddie, Joseph L. (2016) Fast assembly of gold nanoparticles in large-area 2D nanogrids using a one-step, near-infrared radiation-assisted evaporation process. ACS Nano, 1-11. (doi:10.1021/acsnano.5b06886).

Record type: Article

Abstract

When fabricating photonic crystals from suspensions in volatile liquids using the horizontal deposition method, the conventional approach is to evaporate slowly to increase the time for particles to settle in an ordered, periodic close-packed structure. Here, we show that the greatest ordering of 10 nm aqueous gold nanoparticles (AuNPs) in a template of larger spherical polymer particles (mean diameter of 338 nm) is achieved with very fast water evaporation rates obtained with near-infrared radiative heating. Fabrication of arrays over areas of a few cm2 takes only 7 min. The assembly process requires that the evaporation rate is fast relative to the particles’ Brownian diffusion. Then a two-dimensional colloidal crystal forms at the falling surface, which acts as a sieve through which the AuNPs pass, according to our Langevin dynamics computer simulations. With sufficiently fast evaporation rates, we create a hybrid structure consisting of a two-dimensional AuNP nanoarray (or “nanogrid”) on top of a three-dimensional polymer opal. The process is simple, fast, and one-step. The interplay between the optical response of the plasmonic Au nanoarray and the microstructuring of the photonic opal results in unusual optical spectra with two extinction peaks, which are analyzed via finite-difference time-domain method simulations. Comparison between experimental and modeling results reveals a strong interplay of plasmonic modes and collective photonic effects, including the formation of a high-order stopband and slow-light-enhanced plasmonic absorption. The structures, and hence their optical signatures, are tuned by adjusting the evaporation rate via the infrared power density.

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More information

Accepted/In Press date: 14 January 2016
e-pub ahead of print date: 14 January 2016
Keywords: self-assembly, plasmonics, photonics, coupling, gold nanoparticles, inverse opal, evaporation, IR heating
Organisations: Quantum, Light & Matter Group

Identifiers

Local EPrints ID: 386828
URI: https://eprints.soton.ac.uk/id/eprint/386828
ISSN: 1936-0851
PURE UUID: de108142-84cd-44e0-95a6-fe5831d4b34e
ORCID for Antonios G. Kanaras: ORCID iD orcid.org/0000-0002-9847-6706
ORCID for Otto L. Muskens: ORCID iD orcid.org/0000-0003-0693-5504

Catalogue record

Date deposited: 04 Feb 2016 15:43
Last modified: 15 Aug 2019 00:41

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