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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics
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Published on: May 28, 2016

Multifunctional patchy particles by glancing angle deposition.

Amar B Pawar1, Ilona Kretzschmar

  • 1Department of Chemical Engineering, The City College of New York, 140th Street and Convent Avenue, New York City, New York 10031, USA.

Langmuir : the ACS Journal of Surfaces and Colloids
|May 1, 2009
PubMed
Summary
This summary is machine-generated.

Glancing angle deposition (GLAD) now creates multifunctional patchy particles with tunable patchiness, branching, and chemical ordering. A particle stamping technique enables precise control over patch placement for advanced surface-anisotropic materials.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Chemistry

Background:

  • Glancing Angle Deposition (GLAD) is established for creating anisotropic particles with controlled "patchiness".
  • Previous methods were limited in the complexity and multifunctionality of achievable particle surface features.

Purpose of the Study:

  • To extend the GLAD technique for producing multifunctional patchy particles.
  • To incorporate additional anisotropy dimensions beyond simple patchiness, including branching and chemical ordering.
  • To develop methods for accessing the entire particle surface for functionalization.

Main Methods:

  • Utilized Glancing Angle Deposition (GLAD) to engineer particle anisotropy.
  • Employed a particle stamping technique with polydimethylsiloxane (PDMS) stamps.
  • Combined GLAD with particle stamping to achieve controlled patch placement and surface modification.

Main Results:

  • Successfully produced multifunctional patchy particles with controlled "patchiness", "branching", and "chemical ordering".
  • Demonstrated the ability to create particles with patches on opposite poles via the stamping and GLAD combination.
  • Showcased the versatility of the techniques in varying patch size, shape, and orientation.

Conclusions:

  • The integrated GLAD and particle stamping approach significantly expands the toolkit for creating sophisticated surface-anisotropic particles.
  • These multifunctional patchy particles offer new possibilities for advanced materials design and applications.
  • The developed methods provide precise control over particle surface characteristics, enabling tailored functionalities.