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Title: Shape-Specific Patterning of Polymer-Functionalized Nanoparticles

Journal Article · · ACS Nano
 [1];  [1];  [1];  [2];  [3];  [4]; ORCiD logo [5]
  1. Univ. of Toronto, ON (Canada). Dept. of Chemistry
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials
  3. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials; Columbia Univ., New York, NY (United States). Dept. of Chemical Engineering, Dept. of Applied Physics and Applied Mathematics
  4. Russian Academy of Sciences (RAS) and St. Petersburg National Univ. of Informational Technologies, St. Petersburg (Russian Federation). Inst. of Macromolecular Compounds
  5. Univ. of Toronto, ON (Canada). Dept. of Chemistry, Inst. of Biomaterials and Biomedical Engineering, Dept. of Chemical Engineering and Applied Chemistry

Chemically and topographically patterned nanoparticles (NPs) with dimensions on the order of tens of nanometers have a diverse range of applications and are a valuable system for fundamental research. Recently, thermodynamically controlled segregation of a smooth layer of polymer ligands into pinned micelles (patches) offered an approach to nanopatterning of polymer-functionalized NPs. Control of the patch number, size, and spatial distribution on the surface of spherical NPs has been achieved, however, the role of NP shape remained elusive. Here, we report the role of NP shape, namely, the effect of the local surface curvature, on polymer segregation into surface patches. For polymer-functionalized metal nanocubes, we show experimentally and theoretically that the patches form preferentially on the high-curvature regions such as vertices and edges. An in situ transformation of the nanocubes into nanospheres leads to the change in the number and distribution of patches; a process that is dominated by the balance between the surface energy and the stretching energy of the polymer ligands. The experimental and theoretical results presented in this work are applicable to surface patterning of polymer-capped NPs with different shapes, which then enables the exploration of patch-directed self-assembly, as colloidal surfactants, and as templates for the synthesis of hybrid nanomaterials.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0012704
OSTI ID:
1399669
Report Number(s):
BNL-114376-2017-JA; KC0403020
Journal Information:
ACS Nano, Vol. 11, Issue 5; ISSN 1936-0851
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (13)

Staged Surface Patterning and Self‐Assembly of Nanoparticles Functionalized with End‐Grafted Block Copolymer Ligands journal May 2019
Staged Surface Patterning and Self‐Assembly of Nanoparticles Functionalized with End‐Grafted Block Copolymer Ligands journal May 2019
Reconfigurable Polymer Shells on Shape-Anisotropic Gold Nanoparticle Cores journal May 2018
Phase separation in mixed polymer brushes on nanoparticle surfaces enables the generation of anisotropic nanoarchitectures journal January 2018
Mechanical phase inversion of Pickering emulsions via metastable wetting of rough colloids journal January 2019
Helicoidal Patterning of Nanorods with Polymer Ligands journal January 2019
Versatile fabrication of patchy nanoparticles via patterning of grafted diblock copolymers on NP surface journal January 2019
Homopolymer Nanolithography journal July 2017
Protein-coated dsDNA nanostars with high structural rigidity and high enzymatic and thermal stability journal January 2019
Patterning of polyoxometalate rings on gold nanorods journal January 2020
Mechanical phase inversion of Pickering emulsions via metastable wetting of rough colloids text January 2019
Helicoidal Patterning of Nanorods with Polymer Ligands journal January 2019
Janus particles: design, preparation, and biomedical applications journal September 2019

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