The Experts below are selected from a list of 61281 Experts worldwide ranked by ideXlab platform
E. Suraud - One of the best experts on this subject based on the ideXlab platform.
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TIME-RESOLVED FISSION OF Metal Clusters AND NUCLEI
International Journal of Modern Physics E-nuclear Physics, 2008Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We present a brief review of some static and dynamic properties of Metal Clusters. We emphasize relations with atomic nuclei and focus on cluster quantities which have counterparts in nuclei. We discuss in particular the case of the optical response which provides a key tool of analysis of the structure and shape of simple Metal Clusters. We use optical response and corresponding resonant ionization to propose a pump and probe scenario allowing a time resolved analysis of fission in small Metal Clusters. This gives access to fission time scales in Metal Clusters in a way similar to measurements of nuclear fission times in hot nuclei. This contribution is summarizing results presented in three previously published papers (P. M. Dinh et al, J. Phys. B 38 (2005) 1637, J. Navarro et al, Euro. Phys, J. A 30 (2006) 333 and P-G. Reinhard et al, Int. J. Mod. Phys E 15 (2006) 1549).
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Metal Clusters AND NUCLEI
International Journal of Modern Physics E, 2006Co-Authors: E. Suraud, P. G. ReinhardAbstract:We present a brief review of some static properties of Metal Clusters. We emphasize relations with atomic nuclei and focus on cluster quantities which have counterparts in nuclei. We discuss in particular the case of the optical response which provides a key tool of analysis of the structure and shape of simple Metal Clusters.
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Time resolved fission in Metal Clusters
Journal of Physics B: Atomic Molecular and Optical Physics, 2005Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We explore from a theoretical point of view pump and probe (P&P) analysis for fission of Metal Clusters where probe pulses are generalized to allow for scanning various frequencies. We show that it is possible to measure the time the system needs to develop to scission. This is achieved by a proper choice of both delay and frequency of the probe pulse. A more detailed analysis even allows to access the various intermediate stages of the fission process.
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Metal Clusters in strong fields
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003Co-Authors: P. G. Reinhard, E. SuraudAbstract:We discuss the response of Metal Clusters subject to strong electromagnetic fields, as delivered by an energetic projectile ion. Density functional theory allows a fully non-adiabatic treatment of both electronic and ionic degrees of freedom, which is unavoidable for a proper description of such involved situations. After a general presentation of the framework we give a few examples of applications in the case of simple Metal Clusters hit by highly charged ions.
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Comparison of self-interaction-corrections for Metal Clusters
Journal of Physics B: Atomic Molecular and Optical Physics, 2002Co-Authors: C. Legrand, E. Suraud, P. G. ReinhardAbstract:We present a simple density-averaged approach to the self-interaction-correction (SIC) methods of density functional theory. We discuss both formal properties and applications, considering particularly Metal Clusters as test cases. We show that the density averaged ansatz exhibits crucial, original (as compared to other SIC schemes) properties such as unitary robustness and applicability to semi-classical approaches. It is ideally suited to systems with well defined length and energy scales such as simple Metal Clusters.
P. G. Reinhard - One of the best experts on this subject based on the ideXlab platform.
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TIME-RESOLVED FISSION OF Metal Clusters AND NUCLEI
International Journal of Modern Physics E-nuclear Physics, 2008Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We present a brief review of some static and dynamic properties of Metal Clusters. We emphasize relations with atomic nuclei and focus on cluster quantities which have counterparts in nuclei. We discuss in particular the case of the optical response which provides a key tool of analysis of the structure and shape of simple Metal Clusters. We use optical response and corresponding resonant ionization to propose a pump and probe scenario allowing a time resolved analysis of fission in small Metal Clusters. This gives access to fission time scales in Metal Clusters in a way similar to measurements of nuclear fission times in hot nuclei. This contribution is summarizing results presented in three previously published papers (P. M. Dinh et al, J. Phys. B 38 (2005) 1637, J. Navarro et al, Euro. Phys, J. A 30 (2006) 333 and P-G. Reinhard et al, Int. J. Mod. Phys E 15 (2006) 1549).
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Metal Clusters AND NUCLEI
International Journal of Modern Physics E, 2006Co-Authors: E. Suraud, P. G. ReinhardAbstract:We present a brief review of some static properties of Metal Clusters. We emphasize relations with atomic nuclei and focus on cluster quantities which have counterparts in nuclei. We discuss in particular the case of the optical response which provides a key tool of analysis of the structure and shape of simple Metal Clusters.
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Time resolved fission in Metal Clusters
Journal of Physics B: Atomic Molecular and Optical Physics, 2005Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We explore from a theoretical point of view pump and probe (P&P) analysis for fission of Metal Clusters where probe pulses are generalized to allow for scanning various frequencies. We show that it is possible to measure the time the system needs to develop to scission. This is achieved by a proper choice of both delay and frequency of the probe pulse. A more detailed analysis even allows to access the various intermediate stages of the fission process.
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Metal Clusters in strong fields
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2003Co-Authors: P. G. Reinhard, E. SuraudAbstract:We discuss the response of Metal Clusters subject to strong electromagnetic fields, as delivered by an energetic projectile ion. Density functional theory allows a fully non-adiabatic treatment of both electronic and ionic degrees of freedom, which is unavoidable for a proper description of such involved situations. After a general presentation of the framework we give a few examples of applications in the case of simple Metal Clusters hit by highly charged ions.
-
Comparison of self-interaction-corrections for Metal Clusters
Journal of Physics B: Atomic Molecular and Optical Physics, 2002Co-Authors: C. Legrand, E. Suraud, P. G. ReinhardAbstract:We present a simple density-averaged approach to the self-interaction-correction (SIC) methods of density functional theory. We discuss both formal properties and applications, considering particularly Metal Clusters as test cases. We show that the density averaged ansatz exhibits crucial, original (as compared to other SIC schemes) properties such as unitary robustness and applicability to semi-classical approaches. It is ideally suited to systems with well defined length and energy scales such as simple Metal Clusters.
Yuichi Negishi - One of the best experts on this subject based on the ideXlab platform.
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Perspective: Exchange reactions in thiolate-protected Metal Clusters
APL Materials, 2017Co-Authors: Yoshiki Niihori, Sakiat Hossain, Bharat Kumar, Lakshmi V. Nair, Wataru Kurashige, Yuichi NegishiAbstract:Thiolate-protected Metal Clusters can exchange ligands or Metal atoms with other substances such as coexisting ligands, complexes, and Metal Clusters in solution. Using these reactions, it is possible to synthesize Metal Clusters with new physical and chemical properties. Although the occurrence of such reactions was recognized nearly 20 years ago, their details were not well understood. In recent years, techniques for the precise synthesis of Metal Clusters and their characterization have progressed considerably and, as a result, details of these reactions have been clarified. In this perspective, we focus on the most-studied thiolate-protected gold Clusters and provide a summary of recent findings as well as future expectations concerning the exchange reactions of these Clusters.
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separation of precise compositions of noble Metal Clusters protected with mixed ligands
Journal of the American Chemical Society, 2013Co-Authors: Yoshiki Niihori, Miku Matsuzaki, T Pradeep, Yuichi NegishiAbstract:This report describes the precise and systematic synthesis of PdAu24 Clusters protected with two types of thiolate ligands (-SR1 and -SR2). It involved high-resolution separation of Metal Clusters containing a distribution of chemical compositions, PdAu24(SR1)18–n(SR2)n (n = 0, 1, 2, ..., 18), to individual Clusters of specific n using high-performance liquid chromatography. Similar high-resolution separation was achieved for a few ligand combinations as well as Clusters with other Metal cores, such as Au25 and Au38. These results demonstrate the ability to precisely control the chemical composition of two types of ligands in thiolate-protected mono- and biMetallic Metal Clusters. It is expected that greater functional control of thiolate-protected Metal Clusters, their regular arrays, and systematic variation of their properties can now be achieved.
Yoshiki Niihori - One of the best experts on this subject based on the ideXlab platform.
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Perspective: Exchange reactions in thiolate-protected Metal Clusters
APL Materials, 2017Co-Authors: Yoshiki Niihori, Sakiat Hossain, Bharat Kumar, Lakshmi V. Nair, Wataru Kurashige, Yuichi NegishiAbstract:Thiolate-protected Metal Clusters can exchange ligands or Metal atoms with other substances such as coexisting ligands, complexes, and Metal Clusters in solution. Using these reactions, it is possible to synthesize Metal Clusters with new physical and chemical properties. Although the occurrence of such reactions was recognized nearly 20 years ago, their details were not well understood. In recent years, techniques for the precise synthesis of Metal Clusters and their characterization have progressed considerably and, as a result, details of these reactions have been clarified. In this perspective, we focus on the most-studied thiolate-protected gold Clusters and provide a summary of recent findings as well as future expectations concerning the exchange reactions of these Clusters.
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separation of precise compositions of noble Metal Clusters protected with mixed ligands
Journal of the American Chemical Society, 2013Co-Authors: Yoshiki Niihori, Miku Matsuzaki, T Pradeep, Yuichi NegishiAbstract:This report describes the precise and systematic synthesis of PdAu24 Clusters protected with two types of thiolate ligands (-SR1 and -SR2). It involved high-resolution separation of Metal Clusters containing a distribution of chemical compositions, PdAu24(SR1)18–n(SR2)n (n = 0, 1, 2, ..., 18), to individual Clusters of specific n using high-performance liquid chromatography. Similar high-resolution separation was achieved for a few ligand combinations as well as Clusters with other Metal cores, such as Au25 and Au38. These results demonstrate the ability to precisely control the chemical composition of two types of ligands in thiolate-protected mono- and biMetallic Metal Clusters. It is expected that greater functional control of thiolate-protected Metal Clusters, their regular arrays, and systematic variation of their properties can now be achieved.
Phuong Mai Dinh - One of the best experts on this subject based on the ideXlab platform.
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TIME-RESOLVED FISSION OF Metal Clusters AND NUCLEI
International Journal of Modern Physics E-nuclear Physics, 2008Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We present a brief review of some static and dynamic properties of Metal Clusters. We emphasize relations with atomic nuclei and focus on cluster quantities which have counterparts in nuclei. We discuss in particular the case of the optical response which provides a key tool of analysis of the structure and shape of simple Metal Clusters. We use optical response and corresponding resonant ionization to propose a pump and probe scenario allowing a time resolved analysis of fission in small Metal Clusters. This gives access to fission time scales in Metal Clusters in a way similar to measurements of nuclear fission times in hot nuclei. This contribution is summarizing results presented in three previously published papers (P. M. Dinh et al, J. Phys. B 38 (2005) 1637, J. Navarro et al, Euro. Phys, J. A 30 (2006) 333 and P-G. Reinhard et al, Int. J. Mod. Phys E 15 (2006) 1549).
-
Time resolved fission in Metal Clusters
Journal of Physics B: Atomic Molecular and Optical Physics, 2005Co-Authors: Phuong Mai Dinh, P. G. Reinhard, E. SuraudAbstract:We explore from a theoretical point of view pump and probe (P&P) analysis for fission of Metal Clusters where probe pulses are generalized to allow for scanning various frequencies. We show that it is possible to measure the time the system needs to develop to scission. This is achieved by a proper choice of both delay and frequency of the probe pulse. A more detailed analysis even allows to access the various intermediate stages of the fission process.
