Gold nanoparticle arrays organized in mixed patterns through directed self-assembly of ultrathin block copolymer films on topographic substrates

Noga Eren; Ofer Burg; Elisheva Michman; Inna Popov; Roy Shenhar

doi:10.1016/j.polymer.2022.124727

Gold nanoparticle arrays organized in mixed patterns through directed self-assembly of ultrathin block copolymer films on topographic substrates

Noga Eren, Ofer Burg, Elisheva Michman, Inna Popov, Roy Shenhar^*

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

5 Scopus citations

Abstract

Controlling complexity in assemblies of metal and semiconductor nanoparticles has the potential to expand the utilization of photonic devices into wavelength regimes that are currently inaccessible. Here we show that casting ultrathin films of asymmetric block copolymers on topographically defined substrates affords four types of mixed patterns through fine control of film thickness. Analysis of top-view and cross-sectional images revealed different morphological behavior of the film in the trench and on the plateau, which was explained by the difference in the type of boundary imposed by each topographic feature. Exposed domains were chemically modified and selectively decorated with gold nanoparticles, giving rise to nanoparticle superstructures with mixed patterns in a controlled fashion. We envisage utilization of such hierarchical superstructures as plasmon waveguides and metasurfaces.

Original language	American English
Article number	124727
Journal	Polymer
Volume	245
DOIs	https://doi.org/10.1016/j.polymer.2022.124727
State	Published - 6 Apr 2022

Bibliographical note

Funding Information:
We thank Marcus Müller for insightful discussions. N.E. and O.B. thank the Hebrew University and the Hebrew University Center for Nanoscience and Nanotechnology (HUCNN) for M.Sc. fellowships. E.M. thanks the Cambr Charitable Foundation for a Ph.D. fellowship. Financial support for this work was provided by the Israeli Science Foundation (grant number 229/17 ) and the Israel Innovation Authority .

Funding Information:
Noga Eren, Ofer Burg, Elisheva Michman report financial support was provided by Israel Science Foundation. Elisheva Michman reports financial support was provided by Israel Innovation Authority. Roy Shenhar has patent MULTI-MORPHOLOGY BLOCK CO-POLYMER FILMS AND PROCESSES FOR THEIR PREPARATION pending to Yissum Research Development Company.

Funding Information:
We thank Marcus M?ller for insightful discussions. N.E. and O.B. thank the Hebrew University and the Hebrew University Center for Nanoscience and Nanotechnology (HUCNN) for M.Sc. fellowships. E.M. thanks the Cambr Charitable Foundation for a Ph.D. fellowship. Financial support for this work was provided by the Israeli Science Foundation (grant number 229/17) and the Israel Innovation Authority.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

Block copolymers
Directed self-assembly
Hierarchical structures
Nanoparticles
Thin films

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10.1016/j.polymer.2022.124727

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abstract = "Controlling complexity in assemblies of metal and semiconductor nanoparticles has the potential to expand the utilization of photonic devices into wavelength regimes that are currently inaccessible. Here we show that casting ultrathin films of asymmetric block copolymers on topographically defined substrates affords four types of mixed patterns through fine control of film thickness. Analysis of top-view and cross-sectional images revealed different morphological behavior of the film in the trench and on the plateau, which was explained by the difference in the type of boundary imposed by each topographic feature. Exposed domains were chemically modified and selectively decorated with gold nanoparticles, giving rise to nanoparticle superstructures with mixed patterns in a controlled fashion. We envisage utilization of such hierarchical superstructures as plasmon waveguides and metasurfaces.",

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author = "Noga Eren and Ofer Burg and Elisheva Michman and Inna Popov and Roy Shenhar",

note = "Funding Information: We thank Marcus M{\"u}ller for insightful discussions. N.E. and O.B. thank the Hebrew University and the Hebrew University Center for Nanoscience and Nanotechnology (HUCNN) for M.Sc. fellowships. E.M. thanks the Cambr Charitable Foundation for a Ph.D. fellowship. Financial support for this work was provided by the Israeli Science Foundation (grant number 229/17 ) and the Israel Innovation Authority . Funding Information: Noga Eren, Ofer Burg, Elisheva Michman report financial support was provided by Israel Science Foundation. Elisheva Michman reports financial support was provided by Israel Innovation Authority. Roy Shenhar has patent MULTI-MORPHOLOGY BLOCK CO-POLYMER FILMS AND PROCESSES FOR THEIR PREPARATION pending to Yissum Research Development Company. Funding Information: We thank Marcus M?ller for insightful discussions. N.E. and O.B. thank the Hebrew University and the Hebrew University Center for Nanoscience and Nanotechnology (HUCNN) for M.Sc. fellowships. E.M. thanks the Cambr Charitable Foundation for a Ph.D. fellowship. Financial support for this work was provided by the Israeli Science Foundation (grant number 229/17) and the Israel Innovation Authority. Publisher Copyright: {\textcopyright} 2022 Elsevier Ltd",

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AU - Shenhar, Roy

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N2 - Controlling complexity in assemblies of metal and semiconductor nanoparticles has the potential to expand the utilization of photonic devices into wavelength regimes that are currently inaccessible. Here we show that casting ultrathin films of asymmetric block copolymers on topographically defined substrates affords four types of mixed patterns through fine control of film thickness. Analysis of top-view and cross-sectional images revealed different morphological behavior of the film in the trench and on the plateau, which was explained by the difference in the type of boundary imposed by each topographic feature. Exposed domains were chemically modified and selectively decorated with gold nanoparticles, giving rise to nanoparticle superstructures with mixed patterns in a controlled fashion. We envisage utilization of such hierarchical superstructures as plasmon waveguides and metasurfaces.

AB - Controlling complexity in assemblies of metal and semiconductor nanoparticles has the potential to expand the utilization of photonic devices into wavelength regimes that are currently inaccessible. Here we show that casting ultrathin films of asymmetric block copolymers on topographically defined substrates affords four types of mixed patterns through fine control of film thickness. Analysis of top-view and cross-sectional images revealed different morphological behavior of the film in the trench and on the plateau, which was explained by the difference in the type of boundary imposed by each topographic feature. Exposed domains were chemically modified and selectively decorated with gold nanoparticles, giving rise to nanoparticle superstructures with mixed patterns in a controlled fashion. We envisage utilization of such hierarchical superstructures as plasmon waveguides and metasurfaces.

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Gold nanoparticle arrays organized in mixed patterns through directed self-assembly of ultrathin block copolymer films on topographic substrates

Abstract

Bibliographical note

Keywords

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