A5100443821- Ion-surface interactions and analysis
- Atomic and Molecular Physics
- X-ray Spectroscopy and Fluorescence Analysis
- Electron and X-Ray Spectroscopy Techniques
- Mass Spectrometry Techniques and Applications
- Advanced Chemical Physics Studies
- Semiconductor materials and devices
- Spectroscopy and Quantum Chemical Studies
- Graphene research and applications
- Diamond and Carbon-based Materials Research
- Fusion materials and technologies
- Nuclear Physics and Applications
- Molecular Junctions and Nanostructures
- Luminescence Properties of Advanced Materials
- Nuclear Materials and Properties
- Perovskite Materials and Applications
- Quantum optics and atomic interactions
- Nonlinear Optical Materials Studies
- Quantum Dots Synthesis And Properties
- Cold Atom Physics and Bose-Einstein Condensates
- Nuclear physics research studies
- Photorefractive and Nonlinear Optics
- Terahertz technology and applications
- Nanowire Synthesis and Applications
- Muon and positron interactions and applications
Lanzhou University
2007-2024
Ministry of Education
2022
PRG S&Tech (South Korea)
2022
Southwest Jiaotong University
2021
Lanzhou University of Technology
2007-2018
Centre National de la Recherche Scientifique
2011
Institut des Sciences Moléculaires d'Orsay
2011
Université Paris-Sud
2011
Abstract This paper provides an overview of the current status ultrafast and ultra-intense lasers with peak powers exceeding 100 TW examines research activities in high-energy-density physics within China. Currently, 10 high-intensity over are operational, about additional being constructed at various institutes universities. These facilities operate either independently or combined one another, thereby offering substantial support for both Chinese international development efforts physics.
An Ni-based coordination polymer, namely, poly[tetraaquabis[4,7-bis(1 H -pyrazol-4-yl)benzo[ c ][1,2,5]thiadiazole][μ 4 -5,5′-(1,3,6,8-tetraoxo-1,3,6,8-tetrahydrobenzo[ lmn ][3,8]phenanthroline-2,7-diyl)diisophthalato]dinickel(II)], {[Ni 2 (C 30 10 N O 12 )(C 8 6 S) (H O) ]·2C 3 7 NO·H O} n or Ni-BIBT-BINDI , with a crystal structure reminiscent of bamboo has been synthesized, the Ni 2+ ions exhibiting slightly distorted octahedral geometry atoms and atoms. The bond lengths Ni—O bonds range...
Luminescence defects, which are commonly known as color centers in hexagonal boron nitride (hBN), promising for applications quantum sensing and emitters, but most of them challenging to efficiently fabricate identify. Here, we explore the photoluminescence (PL) spectra hBN-based heterojunctions. We clearly observed a series PL with peaks at ∼680 nm monolayer nanometer-thick hBN/SiO2 heterojunctions after helium-ion irradiation; line shape width those same vacancy bulk hBN peak 818 nm. also...
The nonmonotonic energy dependence of the $\mathrm{L}{\mathrm{i}}^{0}$ fraction on high-work-function surfaces has not been understood so far. To further study this phenomenon, in work, efficient neutralization $\mathrm{N}{\mathrm{a}}^{+}$ ions reported various surfaces, instead $\mathrm{L}{\mathrm{i}}^{+}$ ions. $\mathrm{N}{\mathrm{a}}^{0}$ becomes more and obvious with increase surface work function. For Cu(111) Cu(110) at scattering angle 7\ifmmode^\circ\else\textdegree\fi{}, neutral is...
Negative-ion fractions depending on incident energies and angles have been measured for keV-energy fluorine negative ions scattering a graphite surface at angle of 38\ifmmode^\circ\else\textdegree\fi{}. For specular scattering, the fraction increases monotonously with increasing energy. A specific feature is nonmonotonic angular dependence variation angles. It strongly indicates interaction-time-dependent electron transfer process. The incident-velocity effect has taken into account to...
The jellium model of free electron gas and its extended version have been widely used to understand the neutralization alkali-metal ions on metal surfaces. We report an unexpected deviation from prediction that we observed in $\mathrm{N}{\mathrm{a}}^{+}$ scattering Al(111) surface. find probability decreases monotonically with increasing ion velocity for specular condition, which is consistent well-known parallel effect. However, exhibits bell shape variation outgoing angle a given incident...
Li${}^{+}$ ions with energies ranging from 0.3 to 2 keV are scattered Au(110) and Pd(100) surfaces ultrathin Ag film grown on Au(111) in order study electron transfer phenomena. We find that neutralization occurs quite efficiently an anomalous ion energy dependence of the neutral fraction for previously noted Au(111). The azimuthal angle is reported. In case monolayer Au(111), results similar Ag(111) surface. To understand dependence, we present a theoretical using density functional theory...
The transmission of 18-keV ${\text{O}}^{\ensuremath{-}}$ ions through ${\text{Al}}_{2}{\text{O}}_{3}$ nanocapillaries with 50 nm in diameter and $12\text{ }\ensuremath{\mu}\text{m}$ length is studied this work. By measuring angular distribution transmitted particles when capillaries were tilted respect to incident ion beam, two peaks observed. It distinguished that one them composed by direct another scattered ions. A phenomenon referred as guiding effect, found for highly charged low-energy...
The dependence of the negative-ion fractions on incident energy and angle is reported for 8.5-22.5 keV F(-) ions scattered from a Si(100) surface at fixed scattering 38°. fraction increases monotonically with velocity specular scattering. In particular, variation bell shaped given energy. We interpret this using incident-velocity effect short distances where yield negative depends number initial neutrals. It strongly indicates that distances, dynamical equilibrium population never achieved....
In this work, the efficient electron loss process was observed for transmission of 10- to 18-keV Cu${}^{\ensuremath{-}}$ and Cl${}^{\ensuremath{-}}$ ions through Al${}_{2}$O${}_{3}$ nanocapillaries. The fractions scattered particles were simultaneously measured using a position-sensitive microchannel plate detector. neutrals guided capillary via multiple grazing scattering. particular, in transmission, whereas no ion formed. contrast highly charged ions, these results support strongly fact...
The Demkov model fails to explain the formation of negative ions in grazing scattering atoms from insulator surfaces at relatively high velocities, since electron detachment process is not included model. In this work, well-known quantum tunneling effect for electrons through repulsive Coulomb barrier has been proposed describe formed ions. combination these two models results excellent agreement with experimental data overall impact velocity range.
Water–Cu(110) interaction is of particular importance during the routine use graphene-based devices. In this work, water adsorption, dissociation, and desorption at elevated temperatures have been well studied using time-of-flight ion scattering technique. It found that adsorption meets first-order Langmuir model room temperature. The variation ratio between residual O H on surface with temperature has determined, which profoundly reveals dynamical process composition. Furthermore, change in...
The transmission of 10–18 keV O− ions through Al2O3 nano-capillaries has been investigated experimentally. From the angular distribution transmitted particles, O0 and O+ can be distinguished in mixed scattered beams. fractions increase with both tilt angle incident energy, which indicates strongly that there is dynamical charge exchange scattering negative on insulator surface. Moreover, it found neutrals (O0) are only more or less guided along capillary axis, greatly different from case...
Charge transfer on graphite, a typical substrate and one of the fusion first wall materials, is great importance in plasma–wall interaction, thin-film growth, surface catalysis. We present an experimental study 8.5–22.5 keV energy carbon, oxygen, fluorine negative ions scattering from highly oriented pyrolytic graphite (HOPG) at angle 8°. It found that positive ion fraction decreases monotonically with increase both incident velocity angle. In particular, these dependences are very different...
We present a study of the functionalization monocrystalline ZnO surface using aromatic dithiols. The aim is to obtain sulfur-terminated self-assembled monolayer (SAM), which then used for creation further molecular superstructures with intercalated metal atoms. These metal-molecule structures are characterized by high-resolution X-ray photoelectron spectroscopy (XPS) and near edge adsorption fine structure (NEXAFS) measurements. Formation 5,5- bis(mercaptomethyl)-2,20- bipyridine (BPD) SAM...
We have measured the cross-section ratios of helium induced by Cq+ and Oq+ (q = 1–4) in an energy range from 20 keV/amu to 500 keV/amu, obtained two-dimensional spectra employing coincidence method combined with MPA-3 data acquisition system. Hence, we obtain total single-ionization cross-sections (SI, SC, SLSI, DLSI), double-ionization (DI, DC, TI, SLDI, DLDI) every process DLSI, DI, DLDI), which induce double-ionization, cross sections respectively. The competitive relations between...