Buscar
Mostrando ítems 11-20 de 494
Structural order in ultrathin films of the monolayer protected clusters based upon 4 nm gold nanocrystals: an experimental and theoretical studyStructural order in ultrathin films of the monolayer protected clusters based upon 4 nm gold nanocrystals: an experimental and theoretical study
(Royal Society of Chemistry, 2014-05)
The structural order in ultrathin films of monolayer protected clusters (MPCs) is important in a number of application areas but can be difficult to demonstrate by conventional methods, particularly when the metallic core ...
Synthesis of water-soluble gold clusters in nanosomes displaying robust photoluminescence with very large Stokes shift
(Elsevier, 2015-06)
This paper reports a novel procedure using nanosomes, made of bola-hydroxyl and mercapto-palmitic acids, for the production of gold clusters with robust luminescent emissions and very large Stokes shifts. It shows that ...
Adsorção de cluster de ouro em materiais bidimensionais
(Universidade Federal de Santa MariaBrasilFísicaUFSMPrograma de Pós-Graduação em FísicaCentro de Ciências Naturais e Exatas, 2017-07-31)
In this work, we studied the interaction of Au34 gold cluster with different two-dimensional
materials. Au clusters, differently of their macroscopic form, are chemically reactive. Their
use requires substrates. The ...
Au13-nAgn clusters: a remarkably simple trend
(Royal Soc Chemistry, 2015)
The planar to three dimensional transition of Au13-nAgn clusters is investigated. To do so the low
lying energy configurations for all possible concentrations (n values) are evaluated. Many
thousands of possible conformations ...
Nanocluster collisions as a way to understand the role of d-shell polarization
(2012)
Collision processes between single gold and rhodium atoms and gold and rhodium nanoclusters, respectively, are used to study the interplay between the large elastic energies and the much smaller magnetic interactions. The ...
Nature of mercury inclusion in intermediate 6-valence electron [M@Au8Hgx(PPh3)(8)](n+) (M = Au, Pd, Pt; x=0-2) protected gold superatoms: Insights from relativistic density functional theory calculations
(Facultad de Ingeniería y Tecnología, 2020)
Superatomic clusters offer useful templates displaying distinctive physical and chemical characteristics. Here, we explore the [M@Au-8(PPh3)(8)](n+) (M = Au, n = 3; Pd, Pt, n = 2) robust framework to gain an understanding ...
Collisions between a single gold atom and 13 atom gold clusters: an ab initio approach
(SPRINGER, 2011-01)
Collision processes between a single gold atom and a gold cluster are investigated by means of ab initio techniques. The targets we consider are minimum energy 13 gold atom clusters. The kinetic energy of the projectile ...
Dynamics of RS-(Au-SR)x staple motifs on metal surfaces: From nanoclusters to 2D surfaces
(American Chemical Society, 2020-02-06)
Limited stability of metal nanoparticles hinders their long-term uses and applications. For metal nanoclusters, this is even more critical, as physicochemical properties rely on the structure of only a few hundred atoms. ...
Photostability of gold nanoparticles with different shapes: the role of Ag clusters
(Royal Society of Chemistry, 2015-07)
Anisotropic gold nanostructures prepared by the seed method in the presence of Ag ions have been used to study their photostability to low-power UV irradiation (254 nm) at room temperature. It has been observed that, whereas ...
Obtenção de nanoclusters fluorescentes de ouro em puliuretanos a base de ß-ciclodextrinas
(Universidade Federal de SergipePós-Graduação em QuímicaBRUFS, 2017)