Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Entire DC Network
Self-Assembly In Mixtures Of Charged Lobed Particles, Arpita Srivastava, Brunno C. Rocha, Harish Vashisth
Self-Assembly In Mixtures Of Charged Lobed Particles, Arpita Srivastava, Brunno C. Rocha, Harish Vashisth
New Hampshire EPSCoR
We report coarse-grained Langevin dynamics simulations of homogeneous mixtures of lobed colloidal particles with opposite charges. We show that dumbbell, trigonal planar, tetrahedral, square planar, trigonal bipyramidal, and octahedral shaped particles form distinct self-assemblies including chains, sheets, crystalline, and spherical structures. The dumbbell and square planar particles predominantly form chains and sheets while other particles form network-like self-assembled morphologies. At higher temperatures and lower charges, non-planar particles form three-dimensional aggregates. We further report on packing arrangements of particles which lead to differences in porosities within self-assembled morphologies. Our results show that the trigonal planar particles form larger porous structures. The …
Self-Assembly Of Porous Structures From A Binary Mixture Of Lobed Patchy Particles, Sanjib Paul, Harish Vashisth
Self-Assembly Of Porous Structures From A Binary Mixture Of Lobed Patchy Particles, Sanjib Paul, Harish Vashisth
New Hampshire EPSCoR
We report simulation studies on the self-assembly of a binary mixture of snowman and dumbbell shaped lobed particles. Depending on the lobe size and temperature, different types of self-assembled structures (random aggregates, spherical aggregates, liquid droplets, amorphous wire-like structures, amorphous ring structures, crystalline structures) are observed. At lower temperatures, heterogeneous structures are formed for lobed particles of both shapes. At higher temperatures, homogeneous self-assembled structures are formed mainly by the dumbbell shaped particles, while the snowman shaped particles remain in a dissociated state. We also investigated the porosities of self-assembled structures. The pore diameters in self-assemblies increased with an increase …
Role Of Entropy In Colloidal Self-Assembly, Brunno C. Rocha, Sanjib Paul, Harish Vashisth
Role Of Entropy In Colloidal Self-Assembly, Brunno C. Rocha, Sanjib Paul, Harish Vashisth
New Hampshire EPSCoR
Entropy plays a key role in the self-assembly of colloidal particles. Specifically, in the case of hard particles, which do not interact or overlap with each other during the process of self-assembly, the free energy is minimized due to an increase in the entropy of the system. Understanding the contribution of entropy and engineering it is increasingly becoming central to modern colloidal self-assembly research, because the entropy serves as a guide to design a wide variety of self-assembled structures for many technological and biomedical applications. In this work, we highlight the importance of entropy in different theoretical and experimental self-assembly …