Journal ArticleDOI
Preparation and photoionization potentials of molecules of sodium, potassium, and mixed atoms
TLDR
In this article, photoionization near the threshold allows identification of Naxx?16, Kxx?12, and NaxKyx+y?6, which is the longest contiguous series of any property as a function of cluster size.Abstract:
In supersonic nozzle beams of sodium, potassium, and Na/K molecular aggregates Mx have been investigated by several techniques based on mass spectrometry. By electron impact ionization with energy of 20 eV clusters with x≳4 are not observable. Photoionization near the threshold allows identification of Naxx?16, Kxx?12, and NaxKyx+y?6. Single photon ionization thresholds for Naxx?14 are given, this being the hitherto longest contiguous series of any property as a function of cluster size. For Kxx?8 and for 8 Na/K mixed clusters PI thresholds are similarly determined. Very accurate two photon photoionization thresholds for Na2 and K2 have been obtained. Theoretical models of metal clusters from recent publications are not able to adequately interpret the electronic properties of these particles as reflected by the ionization potentials.read more
Citations
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Journal ArticleDOI
Clusters—A new phase of matter
TL;DR: A review of the recent developments in the field of atomic clusters can be found in this paper with particular emphasis on cluster properties that are quite distinct from their atomic or solid state behavior.
Journal ArticleDOI
Molecular-beam spectroscopy of high-temperature species with narrow-band dye lasers
Wolfgang Ernst,Jörn Kändler +1 more
TL;DR: In this paper, the Stark effect spectroscopy method was used to investigate a large class of molecular species including radicals and small clusters, including small clusters of small molecules and small radicals.
Journal ArticleDOI
Defect processes induced by electronic excitation at halide crystal surfaces
TL;DR: In this paper, an atomic force microscopy (AFM) image of the surface of a potassium iodide (KI) crystal was obtained by exposure to ultraviolet light in the exciton absorption spectrum.
Book ChapterDOI
Clusters as a Key to the Understanding of Properties as a Function of Size and Dimensionality
TL;DR: In this paper, the authors explore the effects of size effects in conjunction with surface phenomena in clusters and build bridges between molecular, condensed matter and surface chemical physics, and quantify the "smooth" evolution of condensed matter properties and of microscopic surface characteristics with increasing the cluster size.
Journal ArticleDOI
Electronic properties of small Kn (n ⩽ 8) and bimetallic KnCum (n, m ⩽ 4) clusters
TL;DR: In this article, the electronic structure and geometry of K n, K n +, K n Cu m and K nCu m + (n, m ǫ⩽ 4) were theoretically investigated and compared with similar clusters containing lithium atoms, using density functional methods.
References
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Journal ArticleDOI
Über die Zuordnung von Wellenfunktionen und Eigenwerten zu den Einzelnen Elektronen Eines Atoms
TL;DR: In this paper, Fock's Naherungsmethode zur Behandung des quantenmechanischen Mehrelektronenproblems aufgestellten Gleichungen werden auf etwas allgemeinerer Grundlage diskutiert.
Journal ArticleDOI
Size effect on the melting temperature of gold particles
Philippe A. Buffat,JP Borel +1 more
TL;DR: In this article, the melting points of small gold particles have been measured using a scanning electron-diffraction technique and the experimental results are quantitatively in good agreement with two phenomenological models.
Introduction to solid state physics
TL;DR: In this paper, the Hartree-Fock Approximation of many-body techniques and the Electron Gas Polarons and Electron-phonon Interaction are discussed.