共 17 条
Self-assembly of spherical Janus particles in electrolytes
被引:31
作者:
Moghani, Mahdy Malekzadeh
[1
,2
]
Khomami, Bamin
[1
,2
]
机构:
[1] Univ Tennessee, SEERC, Knoxville, TN 37996 USA
[2] Univ Tennessee, MRAIL, Dept Chem & Biomol Engn, Knoxville, TN 37996 USA
来源:
关键词:
D O I:
10.1039/c3sm27345h
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Experimental studies on nano- and micrometer sized Janus particles (JPs) have demonstrated a plethora of simple and complex self-assembled structures. In this study, molecular dynamics simulations that include long range Coulombic interaction have been utilized to elucidate the underlying physics of self-assembly of nano-scale spherical bipolar JPs as a function of surface charge density, salt concentration and particle size. Specifically, two distinct sub-structures at low JP concentration, namely, strings and rings have been identified. As the concentration of JPs is increased these sub-structures join and/or hierarchically assemble into larger porous clusters. Moreover, it has been demonstrated that surface charge defects lead to precipitous loss of directional self-assembly. Finally, a direct connection between the ionic cloud around a single JP and the self-assembled structure morphology has been demonstrated. Overall, the results of this study should pave the way for future coordinated experimental/computational studies towards development of a mechanistic understanding of morphology development in this class of material.
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页码:4815 / 4821
页数:7
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