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Peer-reviewedCC BY-NC-ND 4.0Small (Weinheim an Der Bergstrasse, Germany)

Hybrid Emulsion‐Dispersion (HED) Polymerization Enables One‐Pot Synthesis of Functional Janus Nanoparticles

  • Utsav Kumar Dey1
  • Ricardo Ortega1
  • Serkan Demirci1
  • Yifan Li1
  • Fei Liu1
  • Zhengtao Yang1
  • Tiago Twedt1
  • Prabhdeesh Singh2
  • Juan‐Carlos Mora‐Diaz3
  • Nubia Resende De Macedo3
  • Luis G. Gimenez‐Lirola3
  • Shan Jiang1
  1. 1Department of Materials Science and Engineering Iowa State University of Science and Technology Ames Iowa USA
  2. 2Department of Biochemistry Biophysics and Molecular Biology Iowa State University of Science and Technology Ames Iowa USA
  3. 3Veterinary Diagnostic and Production Animal Medicine Iowa State University of Science and Technology Ames Iowa USA
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Abstract

Janus nanoparticles possess anisotropic architectures that enable strong interfacial interactions and enhanced functionality, yet their synthesis often depends on multistep seeded or templated routes. Here we report hybrid emulsion‐dispersion (HED) polymerization, a one‐pot strategy that introduces a fundamentally different route to Janus morphology by inducing symmetry breaking via polymerization‐induced phase separation in a single reactor. This process directly yields polymeric Janus nanoparticles without seed preparation, sequential monomer addition, or post‐modification. Kinetic studies and a morphology map reveal that symmetry breaking is established within the first minutes of polymerization, while the final morphology is governed by the balance between solubility, interfacial energy, and kinetic arrest. This strategy produces sub‐200 nm Janus nanoparticles with tunable morphologies and compositions. As a proof of concept, we synthesize N‐halamine‐functional Janus nanoparticles via HED and demonstrate their effectiveness in coatings. The particles preferentially enrich at coating interfaces and enable efficient, rechargeable antibacterial activity.

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Cite

BibTeXRIS
BibTeX
@article{dey2026hybrid,
  title = {{Hybrid Emulsion‐Dispersion (HED) Polymerization Enables One‐Pot Synthesis of Functional Janus Nanoparticles}},
  author = {Utsav Kumar Dey and Ricardo Ortega and Serkan Demirci and Yifan Li and Fei Liu and Zhengtao Yang and Tiago Twedt and Prabhdeesh Singh and Juan‐Carlos Mora‐Diaz and Nubia Resende De Macedo and Luis G. Gimenez‐Lirola and Shan Jiang},
  journal = {Small (Weinheim an Der Bergstrasse, Germany)},
  year = {2026},
  month = aug,
  doi = {10.1002/smll.75226},
  url = {https://doi.org/10.1002/smll.75226},
  note = {CC BY-NC-ND 4.0},
}
RIS
TY  - JOUR
TI  - Hybrid Emulsion‐Dispersion (HED) Polymerization Enables One‐Pot Synthesis of Functional Janus Nanoparticles
AU  - Utsav Kumar Dey
AU  - Ricardo Ortega
AU  - Serkan Demirci
AU  - Yifan Li
AU  - Fei Liu
AU  - Zhengtao Yang
AU  - Tiago Twedt
AU  - Prabhdeesh Singh
AU  - Juan‐Carlos Mora‐Diaz
AU  - Nubia Resende De Macedo
AU  - Luis G. Gimenez‐Lirola
AU  - Shan Jiang
PY  - 2026
DA  - 2026/08/19
JO  - Small (Weinheim an Der Bergstrasse, Germany)
DO  - 10.1002/smll.75226
UR  - https://doi.org/10.1002/smll.75226
AB  - Janus nanoparticles possess anisotropic architectures that enable strong interfacial interactions and enhanced functionality, yet their synthesis often depends on multistep seeded or templated routes. Here we report hybrid emulsion‐dispersion (HED) polymerization, a one‐pot strategy that introduces a fundamentally different route to Janus morphology by inducing symmetry breaking via polymerization‐induced phase separation in a single reactor. This process directly yields polymeric Janus nanoparticles without seed preparation, sequential monomer addition, or post‐modification. Kinetic studies and a morphology map reveal that symmetry breaking is established within the first minutes of polymerization, while the final morphology is governed by the balance between solubility, interfacial energy, and kinetic arrest. This strategy produces sub‐200 nm Janus nanoparticles with tunable morphologies and compositions. As a proof of concept, we synthesize N‐halamine‐functional Janus nanoparticles via HED and demonstrate their effectiveness in coatings. The particles preferentially enrich at coating interfaces and enable efficient, rechargeable antibacterial activity.
SN  - 1613-6810
SN  - 1613-6829
ER  -