TY - JOUR
T1 - Ordering Polymer-Grafted Nanoparticles at Oil–Air Interfaces under Magnetic Fields
AU - Liu, Siqi
AU - Wang, Haoyu
AU - Akcora, Pinar
N1 - Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/6
Y1 - 2018/6
N2 - Polymer-grafted magnetic nanoparticles at oil–air interfaces are examined to reveal the role of chain length and anisotropy on particle packing order in thin films. It is found that particles grafted with intermediate chain lengths and sparse grafting densities exhibit enhanced packing order with increasing magnetic field strength. Voronoi tessellation results present an increase in the cell area distribution of these samples, suggesting that chain conformations are affected. For the longest graft length, particles become more disordered under magnetic fields. It is proposed that fluctuations in the bridged chains rearrange particles into less ordered packing with field application and the mechanism of packing order differs for varying graft chain lengths. Grafting anisotropy is found to determine the spatial nanoparticle organization in assembled monolayers.
AB - Polymer-grafted magnetic nanoparticles at oil–air interfaces are examined to reveal the role of chain length and anisotropy on particle packing order in thin films. It is found that particles grafted with intermediate chain lengths and sparse grafting densities exhibit enhanced packing order with increasing magnetic field strength. Voronoi tessellation results present an increase in the cell area distribution of these samples, suggesting that chain conformations are affected. For the longest graft length, particles become more disordered under magnetic fields. It is proposed that fluctuations in the bridged chains rearrange particles into less ordered packing with field application and the mechanism of packing order differs for varying graft chain lengths. Grafting anisotropy is found to determine the spatial nanoparticle organization in assembled monolayers.
KW - anisotropy
KW - interfaces
KW - monolayers
KW - packing order
KW - polymer-grafted nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85048269596&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85048269596&partnerID=8YFLogxK
U2 - 10.1002/macp.201800012
DO - 10.1002/macp.201800012
M3 - Article
AN - SCOPUS:85048269596
SN - 1022-1352
VL - 219
JO - Macromolecular Chemistry and Physics
JF - Macromolecular Chemistry and Physics
IS - 11
M1 - 1800012
ER -