title: A search for lowest energy structures of ZnS quantum dots: Genetic algorithm tight-binding study.
abstract: The lowest energy structures of ZnS quantum dots of different sizes have been determined by an unbiased search using genetic algorithm (GA) coupled with the density-functional tight-binding method. The GA search converges to a rather new ringlike configurations of ZnS quantum dots. We have studied the structural, electronic, and optical properties of these ringlike clusters and compared these properties with those of other reported structures of ZnS quantum dots, namely, hollow, zinc-blende, wurtzite, and rocksalt structures.
authors.affiliation: Department of Chemistry, Visva-Bharati University, Santiniketan-731235, India.
authors.forename: Sougata
authors.initials: S
authors.lastname: Pal
authors.forename: Rahul
authors.initials: R
authors.lastname: Sharma
authors.forename: Biplab
authors.initials: B
authors.lastname: Goswami
authors.forename: Pranab
authors.initials: P
authors.lastname: Sarkar
authors.forename: S P
authors.initials: SP
authors.lastname: Bhattacharyya