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Cryogenic TOF-SIMS Around Sublimation Temperature of Quench-Condensed Noble Gas (Ne, Ar, and Kr) Films.
J Mass Spectrom
January 2025
Research Center for Energy and Environmental Materials, National Institute for Materials Science, Tsukuba, Ibaraki, Japan.
A possible TOF-SIMS analysis of surface phase transitions has recently been proposed for limited cases such as polymers and ionic liquids. In the present study, we have extended this analysis to quench-condensed noble gas films. The newly developed cryogenic TOF-SIMS allowed both measurements of TOF-SIMS below 4 K, and low-energy ion scattering spectroscopy that is used to prepare a clean surface.
View Article and Find Full Text PDFShallow defects and optical properties of CsPbBrthin films through noble gas ion beam defect engineering.
Nanotechnology
November 2024
National Isotope Centre, GNS Science, Lower Hutt 5010, New Zealand.
Ion implantation is widely utilised for the modification of inorganic semiconductors; however, the technique has not been extensively applied to lead halide perovskites. In this report, we demonstrate the modification of the optical properties of caesium lead bromide (CsPbBr) thin films via noble gas ion implantation. We observed that the photoluminescence (PL) lifetimes of CsPbBrthin films can be doubled by low fluences (<1 × 10at·cm) of ion implantation with an acceleration voltage of 20 keV.
View Article and Find Full Text PDFUnveiling distinct bonding patterns in noble gas hydrides interference energy analysis.
Phys Chem Chem Phys
January 2025
School of Chemistry and Forensic Science, University of Kent, Park Wood Rd, Canterbury CT2 7NH, UK.
Despite their apparent simplicity, the helium hydride ion (HeH) and its analogues with heavier noble gas (Ng) atoms present intriguing challenges due to their unusual electronic structures and distinct ground-state heterolytic bond dissociation profiles. In this work, we employ modern valence bond calculations and the interference energy analysis to investigate the nature of the chemical bond in NgH (Ng = He, Ne, Ar). Our findings reveal that the energy well formation in their ground-state potential energy curves is driven by a reduction in kinetic energy caused by quantum interference, identical to cases of homolytic bond dissociation.
View Article and Find Full Text PDFA review of ion scattering spectroscopy studies at liquid interfaces with noble gas ion projectiles.
Adv Colloid Interface Sci
November 2024
Flinders Institute of Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia; Flinders Microscopy and Microanalysis, College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia. Electronic address:
Ion scattering spectroscopy (ISS) is an analytical tool that provides direct structural, topographical, and atomic compositional information at interfaces when ions are used as projectiles. Since its development in 1967, ISS is commonly used to obtain quantitative information about solid interfaces. Over the last couple of decades, ISS has emerged as an important technique to probe liquid interfaces and their studies employing ISS has become not uncommon, more so with Neutral impact collision ion scattering spectroscopy (NICISS).
View Article and Find Full Text PDFMicrosolvation of a Proton by Ar Atoms: Structures and Energetics of ArH Clusters.
Molecules
August 2024
Institute of Fundamental Physics (IFF-CSIC), CSIC, Serrano 123, 28006 Madrid, Spain.
We present a computational investigation on the structural arrangements and energetic stabilities of small-size protonated argon clusters, Ar nH +. Using high-level ab initio electronic structure computations, we determined that the linear symmetric triatomic ArH +Ar ion serves as the molecular core for all larger clusters studied. Through harmonic normal-mode analysis for clusters containing up to seven argon atoms, we observed that the proton-shared vibration shifts to lower frequencies, consistent with measurements in gas-phase IRPD and solid Ar-matrix isolation experiments.
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