The photoluminescence mechanism of ultra-small gold clusters

2016 ◽  
Vol 18 (26) ◽  
pp. 17320-17325 ◽  
Author(s):  
Liangliang Wu ◽  
Weihai Fang ◽  
Xuebo Chen
Keyword(s):  
Excited States ◽  
Gold Clusters ◽  
Radiative Decays ◽  
Photoluminescence Mechanism ◽  
Aurophilic Interactions

The photoluminescence mechanism of ultra-small gold clusters was proposed to reveal the origin of excited states formed by aurophilic interactions and their radiative decays.

Size-dependent dynamics in excited states of gold clusters: From oscillatory motion to photoinduced melting

2007 ◽  
Vol 127 (16) ◽  
pp. 164312 ◽  
Author(s):  
Jörg Stanzel ◽  
Florian Burmeister ◽  
Matthias Neeb ◽  
Wolfgang Eberhardt ◽  
Roland Mitrić ◽  
...  
Keyword(s):  
Excited States ◽  
Gold Clusters ◽  
Oscillatory Motion ◽  
Size Dependent

scholarly journals The Sensitization of Scintillation in Polymeric Composites Based on Fluorescent Nanocomplexes

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3387
Author(s):  
Irene Villa ◽  
Beatriz Santiago Gonzalez ◽  
Matteo Orfano ◽  
Francesca Cova ◽  
Valeria Secchi ◽  
...  
Keyword(s):  
Composite Materials ◽  
Excited States ◽  
Rhodamine 6G ◽  
Polymeric Composite ◽  
Steady State Solution ◽  
Gold Clusters ◽  
Organic Dye ◽  
Rate Equations ◽  
Characteristic Parameters ◽  
Emitting Species

The sensitization of scintillation was investigated in crosslinked polymeric composite materials loaded with luminescent gold clusters aggregates acting as sensitizers, and with organic dye rhodamine 6G as the emitting species. The evolution in time of the excited states population in the systems is described by a set of coupled rate equations, in which steady state solution allowed obtainment of an expression of the sensitization efficacy as a function of the characteristic parameters of the employed luminescent systems. The results obtained indicate that the realization of sensitizer/emitter scintillating complexes is the strategy that must be pursued to maximize the sensitization effect in composite materials.

scholarly journals Fluorescent Thiol-Derivatized Gold Clusters Embedded in Polymers

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
G. Carotenuto ◽  
S. De Nicola ◽  
L. Nicolais
Keyword(s):  
Electronic Structure ◽  
Electronic Structures ◽  
Organic Ligand ◽  
Gold Clusters ◽  
Cluster Compounds ◽  
Sulphur Atom ◽  
Metallic Core ◽  
Fluorescence Characteristics ◽  
Aurophilic Interactions ◽  
Silver Atoms

Owing to aurophilic interactions, linear and/or planar Au(I)-thiolate molecules spontaneously aggregate, leading to molecular gold clusters passivated by a thiolate monolayer coating. Differently from the thiolate precursors, such cluster compounds show very intensive visible fluorescence characteristics that can be tuned by alloying the gold clusters with silver atoms or by conjugating the electronic structure of the metallic core with unsaturated electronic structures in the organic ligand through the sulphur atom. Here, the photoluminescence features of some examples of these systems are shortly described.

scholarly journals Feasibility studies of production and electromagnetic decay studies of hyperons for HADES

2019 ◽  
Vol 199 ◽  
pp. 03011 ◽  
Author(s):  
Krzysztof Nowakowski ◽  
Joanna Kuboś
Keyword(s):  
Excited States ◽  
Beam Energy ◽  
Feasibility Studies ◽  
Radiative Decays ◽  
Bench Mark ◽  
Simulation Studies ◽  
Molecular Models ◽  
Electromagnetic Decay ◽  
Extensive Simulation ◽  
Ideal Tool

The spectrum of excited states of single and double strange hyperons is only poorly known. Their internal structure is controversially discussed within quark, bag and molecular models. The most famous example is Λ(1405). In this context radiative decays are predicted to be an ideal tool to discriminate between various predictions. Moreover, Ξ− production yield measured by HADES in [email protected] GeV and [email protected] GeV experiments strongly overshoots theory predictions and calls for more detailed studies in elementary collisions. In our poster we show results of the feasibility studies for the HADES detector of the cascade production close to the threshold and also the radiative decays of the excited hyperon states. Three bench mark channels: $pp \to \Lambda (15020){K^ + }p \to \Lambda {e^ + }{e^ - }{K^ + }p$, $pp \to \Lambda (1405){K^ + }p \to \Lambda {e^ + }{e^ - }{K^ + }p$ and $pp \to \Sigma (1385){K^ + }p \to \Lambda {e^ + }{e^ - }{K^ + }p$, at beam energy Ek = 4.5 GeV have been put into extensive simulation studies together with the most significant background channels. We will show the results including expected count rates and signal to background ratios.

scholarly journals Radially excited axial-vector mesons in the extended Nambu–Jona-Lasinio model

2014 ◽  
Vol 29 (24) ◽  
pp. 1450125 ◽  
Author(s):  
A. V. Vishneva ◽  
M. K. Volkov
Keyword(s):  
Experimental Data ◽  
Excited State ◽  
Mass Spectrum ◽  
Excited States ◽  
Axial Vector ◽  
Form Factors ◽  
Radiative Decays ◽  
Vector Mesons ◽  
Polynomial Type ◽  
Quark Momentum

The first radial excitations of axial-vector mesons are considered in the framework of the extended U(3) × U(3) Nambu–Jona-Lasinio model. We calculate the mass spectrum of a1, f1 and also strange axial-vector mesons. For description of radially excited states, we used the form factors of polynomial type of the second order in transverse quark momentum. For the ground- and excited-state mesons consisting of light quarks we have calculated the widths of a number of strong and radiative decays. We got satisfactory agreement with experimental data for the ground states. A set of predictions for the excited states of mesons is given.

Size‐Dependent Light Harvesting from Nonthermalized Excited States of Gold Clusters

Solar RRL ◽  
2021 ◽  
pp. 2000710
Author(s):  
Kyunglim Pyo ◽  
Sang Myeong Han ◽  
Hongmei Xu ◽  
Sukanya Saha ◽  
Guda Ramakrishna ◽  
...  
Keyword(s):  
Excited States ◽  
Light Harvesting ◽  
Gold Clusters ◽  
Size Dependent
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