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Template-assisted GLAD: approach to single and multipatch patchy particles with controlled patch shape.

Zhenping He1, Ilona Kretzschmar

  • 1Chemistry Department, The Graduate Center, The City University of New York , 365 Fifth Avenue, New York, New York 10016, United States.

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Template-assisted glancing angle deposition (GLAD) enables the creation of single and multipatch patchy particles with unique asymmetric shapes. This method offers precise control over patch patterns for diverse applications.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Surface Science

Background:

  • Patchy particles are crucial building blocks for advanced materials, but their controlled fabrication, especially with asymmetric shapes, remains challenging.
  • Existing methods often lack the precision to create diverse and complex patch geometries required for specific functionalities.

Purpose of the Study:

  • To develop and demonstrate a template-assisted glancing angle deposition (GLAD) method for fabricating single and multipatch patchy particles with controlled, asymmetric shapes.
  • To investigate the influence of deposition parameters on patch morphology and explore methods for creating functional patchy particles.

Main Methods:

  • Utilized template-assisted glancing angle deposition (GLAD) with template rotation to induce shadowing effects and generate asymmetric patch shapes.
  • Employed a geometric model to analyze the impact of incidence angle, rotational angle, groove size, and particle size on patch formation.
  • Incorporated secondary metal vapor deposition for creating multipatch particles with overlapping patches.

Main Results:

  • Successfully fabricated single and multipatch patchy particles with a variety of controlled, asymmetric patch shapes.
  • Demonstrated that template rotation and shadowing effects are key to achieving diverse patch geometries.
  • Showcased the ability to create two-patch particles with predictable overlapping sections, enabling functional particle design.
  • Confirmed that the method yields batches of particles with identical patch patterns.

Conclusions:

  • Template-assisted GLAD, combined with template rotation and secondary deposition, is a versatile technique for producing patchy particles with tunable asymmetric shapes and multipatches.
  • The developed method provides a reliable route to experimentally accessible patch shapes, valuable for future research and computational studies.
  • This approach facilitates the creation of functional patchy particles with precise control over connectivity and geometry.