Quantum mechanical studies of large metal, metal oxide, and metal chalcogenide nanoparticles and clusters

A Fernando, KLDM Weerawardene… - Chemical …, 2015 - ACS Publications
Metal, metal oxide, and metal chalcogenide materials have a wide variety of applications.
For example, many metal clusters and nanoparticles are used as catalysts for reactions …

Band gap reduction in ZnO and ZnS by creating layered ZnO/ZnS heterostructures

A Torabi, VN Staroverov - The Journal of Physical Chemistry …, 2015 - ACS Publications
Wurtzite-type zinc oxide (ZnO) and zinc sulfide (ZnS) have electronic band gaps that are too
large for light-harvesting applications. Using screened hybrid density-functional methods …

Benchmark assessment of density functional methods on group II–VI MX (M= Zn, Cd; X= S, Se, Te) quantum dots

JM Azpiroz, JM Ugalde, I Infante - Journal of chemical theory and …, 2014 - ACS Publications
In this work, we build a benchmark data set of geometrical parameters, vibrational normal
modes, and low-lying excitation energies for MX quantum dots, with M= Cd, Zn, and X= S …

Exchange functionals and basis sets for density functional theory studies of water splitting on selected ZnO nanocluster catalysts

DC Perera, JC Rasaiah - ACS omega, 2022 - ACS Publications
In this communication, we use density functional theory (DFT) to study the structural
(geometry) and electronic properties (vertical detachment energy and electron affinity) of …

Size dependent structural and polymorphic transitions in ZnO: from nanocluster to bulk

F Viñes, O Lamiel-Garcia, F Illas, ST Bromley - Nanoscale, 2017 - pubs.rsc.org
We report on an extensive survey of (ZnO) N nanostructures ranging from bottom-up
generated nanoclusters to top-down nanoparticles cuts from bulk polymorphs. The obtained …

An efficient genetic algorithm for structure prediction at the nanoscale

T Lazauskas, AA Sokol, SM Woodley - Nanoscale, 2017 - pubs.rsc.org
We have developed and implemented a new global optimization technique based on a
Lamarckian genetic algorithm with the focus on structure diversity. The key process in the …

Computational prediction of structures and optical excitations for nanoscale ultrasmall ZnS and CdSe clusters

KA Nguyen, R Pachter, PN Day - Journal of Chemical Theory and …, 2013 - ACS Publications
Small semiconductor nanoclusters are important for understanding the initial formation and
growth of quantum dots and also for application, for example in the tunability provided by …

A First-Principles Study of II–VI (II= Zn; VI= O, S, Se, Te) Semiconductor Nanostructures

JM Azpiroz, I Infante, X Lopez, JM Ugalde… - Journal of Materials …, 2012 - pubs.rsc.org
We present a systematic investigation of the structural, electronic and optical properties of
wurtzite-like ZnX (X= O, S, Se, Te) nanostructures at the DFT/TDDFT level of theory. To …

Energy landscape of ZnO clusters and low-density polymorphs

R Rasoulkhani, H Tahmasbi, SA Ghasemi, S Faraji… - Physical Review B, 2017 - APS
We report on an extensive study of ZnO materials with cagelike motifs in clusters and bulk
phases through structural searches using the minima hopping method. A novel putative …

An SCC-DFTB repulsive potential for various ZnO polymorphs and the ZnO–water system

M Hellström, K Jorner, M Bryngelsson… - The Journal of …, 2013 - ACS Publications
We have developed an efficient scheme for the generation of accurate repulsive potentials
for self-consistent charge density-functional-based tight-binding calculations, which involves …