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Updated: May 5, 2026

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies

Published on: July 15, 2013

Patchy nanoparticles by atomic stencilling.

Ahyoung Kim¹, Chansong Kim¹, Tommy Waltmann²

¹Department of Materials Science and Engineering, The Grainger College of Engineering, University of Illinois, Urbana, IL, USA.

|October 15, 2025

Summary

This summary is machine-generated.

Researchers developed atomic stencilling to create patchy nanoparticles (NPs) using iodide masks and grafted polymers. This novel bottom-up method enables precise NP patterning for advanced applications.

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Last Updated: May 5, 2026

Microfabrication of Nanoporous Gold Patterns for Cell-material Interaction Studies

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Published on: July 15, 2013

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Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Colloidal Synthesis of Nanopatch Antennas for Applications in Plasmonics and Nanophotonics

Published on: May 28, 2016

Area of Science:

Materials Science
Nanotechnology
Surface Chemistry

Background:

Stencilling is widely used but top-down methods face limitations for complex surfaces.
Bottom-up masking offers advantages like low cost and scalability but remains underdeveloped.
Existing microfabrication techniques struggle with nanoscale patterning on curved or 3D substrates.

Purpose of the Study:

To introduce a novel bottom-up approach for creating patchy nanoparticles (NPs).
To demonstrate the synthesis of diverse NPs with controlled polymer patches.
To explore the self-assembly behavior of these engineered NPs.

Main Methods:

Atomic stencilling utilizing iodide submonolayers as masks.
Ligand-mediated grafting of polymers onto unmasked NP regions.
Polymer scaling theory and molecular dynamics (MD) simulations to analyze morphology.

Main Results:

Successful synthesis of over 20 types of polymer-patched NPs with high yield.
Generation of unique patchy particle morphologies driven by polymer-mask interactions.
Observation of self-assembly into extended crystals with uniform patches and novel superlattices.

Conclusions:

Atomic stencilling provides a versatile bottom-up strategy for nanoscale NP patterning.
This method allows precise control over NP chemistry, reactivity, and interactions.
Potential applications span targeted delivery, catalysis, microelectronics, metamaterials, and tissue engineering.