title: Monte Carlo study on the self-assembly of nanoparticles into a nanorod structure.
abstract: It is well known that semiconductor nanoparticles (NPs) can assemble into a range of low dimensional structures, such as nanowires, nanorods and nanosheets. In this study, we investigate the self-assembly of CdTe NPs by using Monte Carlo simulation. Using a simple model for the anisotropic interaction of NPs, the present Monte Carlo simulation demonstrated that NPs with large dipole moments assemble spontaneously into a nanorod even if the short range interactions among NPs is isotropic. Interestingly, we found that the present nanorod grew by forming a transient structure which looks similar to a double ring. For NPs similar to CdTe, the dipole-dipole interaction had a dominant effect over van der Waals attractions and steric repulsion on the final structure of the NP aggregates. The simulated rods are similar to those observed in the experimental self-assembly of CdTe NPs. The NPs with relatively small electric dipole moments aggregated into more or less isotropic structures.
authors.affiliation: Department of Nanomaterials Engineering, Pusan National University, Miryang 627-706, Republic of Korea.
authors.forename: Mohammad A
authors.initials: MA
authors.lastname: Matin
authors.forename: Hyojeong
authors.initials: H
authors.lastname: Kim
authors.forename: Joyanta K
authors.initials: JK
authors.lastname: Saha
authors.forename: Zhengqing
authors.initials: Z
authors.lastname: Zhang
authors.forename: Jinkwon
authors.initials: J
authors.lastname: Kim
authors.forename: Joonkyung
authors.initials: J
authors.lastname: Jang