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PreprintarXiv licencearXiv

Field Directed Assembly of Anisotropic Composite Pacman Colloids into Reconfigurable Architectures

  • Indira Barros
  • Isha Songara
  • Indrani Chakraborty
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Abstract

We investigate the field-directed assembly of patchy colloidal particles composed of magnetic hematite cubes encapsulated in TPM shells. These Pacman-like particles exhibit specific interactions via their magnetic patch, enabling tunable structures under external fields. A magnetic field drives patch-to-patch interactions, while an AC electric field induces stacking and spreading. By using this multi-field combination and by varying field parameters, such as frequency and amplitude, we achieve programmable transitions between distinct assembly modes. Our work offers a versatile platform for designing reconfigurable colloidal architectures with potential applications in micro-robotics and smart materials.

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Cite

BibTeXRIS
BibTeX
@misc{barros2026field,
  title = {{Field Directed Assembly of Anisotropic Composite Pacman Colloids into Reconfigurable Architectures}},
  author = {Indira Barros and Isha Songara and Indrani Chakraborty},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.32872},
  eprint = {2610.32872},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.32872},
}
RIS
TY  - UNPB
TI  - Field Directed Assembly of Anisotropic Composite Pacman Colloids into Reconfigurable Architectures
AU  - Indira Barros
AU  - Isha Songara
AU  - Indrani Chakraborty
PY  - 2026
DA  - 2026/10/23
PB  - arXiv
DO  - 10.48550/arxiv.2610.32872
UR  - https://arxiv.org/abs/2610.32872
AB  - We investigate the field-directed assembly of patchy colloidal particles composed of magnetic hematite cubes encapsulated in TPM shells. These Pacman-like particles exhibit specific interactions via their magnetic patch, enabling tunable structures under external fields. A magnetic field drives patch-to-patch interactions, while an AC electric field induces stacking and spreading. By using this multi-field combination and by varying field parameters, such as frequency and amplitude, we achieve programmable transitions between distinct assembly modes. Our work offers a versatile platform for designing reconfigurable colloidal architectures with potential applications in micro-robotics and smart materials.
ER  -