Matrix-free polymer grafted nanoparticles (NPs) are single component polymer nanocomposites (PNCs) for which the often reported severe aggregation of the conventional PNCs can be suppressed. For a given particle core, the size and shape of the polymer grafted nanoparticles can be controlled by the molecular weight of the polymer and its grafting density. However, the degree of homogeneity of one-component PNCs depends on the grafted chain molecular weight and grafting density, as well as on the shape of grafted NPs. Surface plasmon resonance enhanced dynamic light scattering from very dilute solutions, yielding both translational and rotational transport coefficients, complemented by UV–Vis extinction spectra, can detect deviations from spheres. Here, we report that poly(isobutylene)-grafted Ag NPs strongly deviate from the spherical shape and are modeled as prolate spheroids. This NP asphericity, due to inhomogeneous grafting, can impact the structure and properties of plasmonic PNCs in the solid state. Thus, characterizing this behavior is a crucial step prior to the formation of one-component PNCs.
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21 February 2020
Research Article|
February 18 2020
Harnessing polymer grafting to control the shape of plasmonic nanoparticles
Special Collection:
Polymer-Grafted Nanoparticles
Ying Zhou;
Ying Zhou
1
School of Chemistry and Chemical Engineering, Shanxi University
, Taiyuan 030006, China
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Liting Yan;
Liting Yan
1
School of Chemistry and Chemical Engineering, Shanxi University
, Taiyuan 030006, China
2
Max Planck Institute for Polymer Research
, Ackermannweg 10, 55128 Mainz, Germany
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Tanmoy Maji;
Tanmoy Maji
3
Department of Chemistry, University of Massachusetts Lowell
, Lowell, Massachusetts 01854, USA
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Gaëtan Lévêque;
Gaëtan Lévêque
4
Institut d’Électronique, de Microélectronique et de Nanotechnologie (IEMN), UMR-CNRS 8520, UFR de Physique
, Université de Lille 1, 59655 Villeneuve d’Ascq, France
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Manos Gkikas
;
Manos Gkikas
a)
3
Department of Chemistry, University of Massachusetts Lowell
, Lowell, Massachusetts 01854, USA
a)Authors to whom correspondence should be addressed: manos_gkikas@uml.edu and fytas@mpip-mainz.mpg.de
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George Fytas
George Fytas
a)
2
Max Planck Institute for Polymer Research
, Ackermannweg 10, 55128 Mainz, Germany
a)Authors to whom correspondence should be addressed: manos_gkikas@uml.edu and fytas@mpip-mainz.mpg.de
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a)Authors to whom correspondence should be addressed: manos_gkikas@uml.edu and fytas@mpip-mainz.mpg.de
Note: This paper is part of the Special Topic on: Polymer-Grafted Nanoparticles.
J. Appl. Phys. 127, 074302 (2020)
Article history
Received:
December 03 2019
Accepted:
February 03 2020
Citation
Ying Zhou, Liting Yan, Tanmoy Maji, Gaëtan Lévêque, Manos Gkikas, George Fytas; Harnessing polymer grafting to control the shape of plasmonic nanoparticles. J. Appl. Phys. 21 February 2020; 127 (7): 074302. https://doi.org/10.1063/1.5140459
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