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Programmable Patch Formation on Anisotropic Nanoparticles.

Jaedeok Lee^1,2, Nayoung Jeon¹, Juyeong Kim^1,2,3

¹Department of Chemistry, Gyeongsang National University, Jinju 52828, South Korea.

ACS Materials Au

|May 18, 2026

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Anisotropic nanoparticles with polymer patches enable directional interactions and adaptive interfaces. Researchers review methods for creating these patches and their applications in advanced materials.

Area of Science:

Materials Science
Nanotechnology
Polymer Chemistry

Background:

Anisotropic nanoparticles offer unique surface properties compared to isotropic nanospheres.
The distinct curvatures of anisotropic cores (rods, triangles, polyhedra) influence grafted polymer behavior.
These features enable spatially resolved chemistry and directional interactions.

Purpose of the Study:

To review strategies for forming polymer patches on anisotropic nanoparticles.
To discuss methods for controlling patch topology and distribution.
To highlight applications of these engineered nanoparticles.

Main Methods:

Ligand-mediated strategies: competitive adsorption, lateral-phase segregation, facet-selective masking.
Curvature-guided dewetting, ligand island formation, atomic stenciling on various anisotropic cores.

Keywords:

anisotropic morphology curvature-guided dewetting facet-selective masking ligand-mediated strategies patchy nanoparticles phase segregation polymer grafting stimuli-induced strategies

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Reorganization of polymer shells via solvent quality or temperature changes (e.g., solvent-triggered collapse, heat-driven contraction).

Main Results:

Demonstrated ligand-mediated and stimulus-responsive methods for creating polymer patches on anisotropic nanoparticles.
Showcased control over patch formation, topology, and distribution based on core shape and external stimuli.
Identified key mechanisms linking ligand chemistry, curvature, and stimuli to patch formation.

Conclusions:

Polymer-patched anisotropic nanoparticles serve as programmable building blocks for advanced hybrid materials.
Anisotropy is crucial for selective patch formation and directional interactions.
These nanoparticles enable applications in supracolloidal architectures, plasmonics, and adaptive coatings.