Role of Surface Metal Clusters in SERS Spectra of Ligands Adsorbed on Ag Colloidal Nanoparticles

2008 ◽  
Vol 112 (3) ◽  
pp. 762-767 ◽  
Author(s):  
Maurizio Muniz-Miranda ◽  
Marco Pagliai ◽  
Gianni Cardini ◽  
Vincenzo Schettino
Keyword(s):  
Metal Clusters ◽  
Colloidal Nanoparticles ◽  
Surface Metal

Role of population analysis in LCAO-MO theory of transition-metal clusters

1975 ◽  
Vol 25 (11) ◽  
pp. 1201-1207 ◽  
Author(s):  
J. Málek ◽  
R. A. Evarestov ◽  
A. N. Ermoshkin ◽  
B. Hejda ◽  
K. Polák
Keyword(s):  
Transition Metal ◽  
Metal Clusters ◽  
Population Analysis ◽  
Transition Metal Clusters ◽  
Lcao Mo Theory ◽  
Lcao Mo ◽  
Mo Theory

The role of quantal fluctuations in the optical response of small metal clusters

2005 ◽  
Vol 38 (11) ◽  
pp. 1581-1589 ◽  
Author(s):  
A Fortini ◽  
M Mazzola ◽  
A Mina ◽  
D Provasi ◽  
G Colò ◽  
...  
Keyword(s):  
Metal Clusters ◽  
Optical Response

Role of complementary shape in protein dimerization

Soft Matter ◽  
2021 ◽  
Author(s):  
Fengyi Gao ◽  
Jens Glaser ◽  
Sharon C Glotzer
Keyword(s):  
Colloidal Nanoparticles ◽  
Protein Dimerization ◽  
Form Complex ◽  
Biomolecular Complexes

Shape guides colloidal nanoparticles to form complex assemblies, but its role in defining interfaces in biomolecular complexes is less clear. In this work, we isolate the role of shape in...

Role of Quantum-size Effects on the Dehydrogenation of CH4 on 3d TMn Clusters: DFT Calculations Combined with Data Mining

2022 ◽  
Author(s):  
Karla Furtado Andriani ◽  
Priscilla Felício Sousa ◽  
Felipe Orlando Morais ◽  
Juarez L. F. Da Silva
Keyword(s):  
Data Mining ◽  
Transition Metal ◽  
Dft Calculations ◽  
Theoretical Investigation ◽  
Size Effects ◽  
Metal Clusters ◽  
Quantum Size Effects ◽  
Transition Metal Clusters ◽  
Quantum Size

In this work, we report a theoretical investigation of the role of quantum-size effects (QSE) on the dehydrogenation of methane (CH4) on 3d transition-metal clusters, TMn , where TM =...

CAPPED METAL CLUSTERS IN THE GAS PHASE

2005 ◽  
Vol 04 (05n06) ◽  
pp. 935-944 ◽  
Author(s):  
JOBIN CYRIAC ◽  
V. R. RAJEEV KUMAR ◽  
T. PRADEEP
Keyword(s):  
Gas Phase ◽  
Chain Length ◽  
Column Chromatography ◽  
Mass Spectra ◽  
Metal Clusters ◽  
Laser Desorption ◽  
Gold Clusters

Alkanethiol protected gold clusters of 29 kDa were prepared and separated by column chromatography. Laser desorption mass spectra of these clusters have been investigated. In the gas phase, monolayer–monolayer interaction leads to clustering of the protected clusters. Role of different matrices and effect of alkanethiol chain length on this process have been investigated.

Dynamical aspects and the role of IVR for the reactivity of noble metal clusters towards molecular oxygen

2007 ◽  
Vol 43 (1-3) ◽  
pp. 201-204
Author(s):  
R. Mitrić ◽  
U. Werner ◽  
C. Bürgel ◽  
V. Bonačić-Koutecký
Keyword(s):  
Molecular Oxygen ◽  
Noble Metal ◽  
Metal Clusters

scholarly journals Outstanding Nobility Observed in Cu5 Clusters Reveals the Key Role of Collective Quantum Effects

2021 ◽  
Author(s):  
David Buceta ◽  
Shahana Huseyinova ◽  
Miguel Cuerva ◽  
Héctor Lozano ◽  
Lisandro J. Giovanetti ◽  
...  
Keyword(s):  
Photoelectron Spectroscopy ◽  
Metal Clusters ◽  
Bulk Material ◽  
Chemical Properties ◽  
Quantum Effects ◽  
High Concentration ◽  
X Ray ◽  
Potential Applications ◽  
New Generation

Subnanometer-sized metal clusters often feature a molecule-like electronic structure, which makes their physical and chemical properties significantly different from those of nanoparticles and bulk material. Considering potential applications, there is a major concern about their thermal stability and susceptibility towards oxidation. Cu clusters of only 5 atoms (Cu<sub>5</sub> clusters) are first synthesized in high concentration using a new-generation wet chemical method. Next, it is shown that, contrary to what is currently assumed, Cu<sub>5</sub> clusters display nobility, beyond resistance to irreversible oxidation, at a broad range of temperatures and oxygen pressures. The outstanding nobility arises from an unusual reversible oxidation which is observed by <i>in situ</i> X-ray Absorption Spectroscopy and X-ray Photoelectron Spectroscopy on Cu<sub>5</sub> clusters deposited onto highly oriented pyrolitic graphite at different oxygen pressures and up to 773 K. This atypical property is explained by a theoretical approach combining different state-of-the-art first principles theories. It reveals the essential role of collective quantum effects in the physical mechanism responsible for the nobility of Cu<sub>5</sub> clusters, encompassing a structural ‘breathing’ through concerted Cu–Cu elongations/contractions upon O<sub>2</sub> uptake/release, and collective charge transfer as well. A predictive phase diagram of their reversible oxidation states is also delivered, agreeing with the experimental observations. The collective quantum effects responsible of the observed nobility are expected to be general in subnanometer-sized metal clusters, pushing this new generation of materials to an upper level.

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