A5102172089- Atomic and Molecular Physics
- Mass Spectrometry Techniques and Applications
- Graphene research and applications
- Laser-Matter Interactions and Applications
- Isotope Analysis in Ecology
- Molecular Junctions and Nanostructures
- Quantum and electron transport phenomena
- Topological Materials and Phenomena
- Nanocluster Synthesis and Applications
- Carbon and Quantum Dots Applications
- Spectroscopy and Quantum Chemical Studies
- Advancements in Battery Materials
- Various Chemistry Research Topics
- Graphene and Nanomaterials Applications
- Laser-Plasma Interactions and Diagnostics
Deutsches Elektronen-Synchrotron DESY
2024-2025
Universität Hamburg
2024-2025
Center for Free-Electron Laser Science
2024-2025
Jilin University
2012-2024
Thomas Young Centre
2018
Imperial College London
2018
Ultrafast carrier relaxation dynamics in fluorescent carbon nanodots is investigated by femtosecond transient absorption spectra at different pH environments so as to understand the mechanism of fluorescence for first time. Utilizing multi-wavelength global analysis fit measured signal via a sequential model, four channels are found, which attributed electron-electron scattering and surface state trapping, optical phonon scattering, acoustic electron-hole recombination respectively. The...
We report on a new versatile transportable endstation for controlled molecule (eCOMO) experiments providing combination of molecular beam purification by electrostatic deflection and simultaneous ion electron detection using velocity-map imaging (VMI). The b-type deflector provides spatial dispersion species based their effective-dipole-moment-to-mass ratio. This enables selective investigation rotational quantum states, conformers, clusters. Furthermore, the double-sided VMI spectrometer...
The interactions between a benzene molecule and multilayer graphenes have been studied in this work using density-functional tight-binding method. Analysis of structural characteristics, energetics, charge distribution etc., uncovers remarkable transfer resulted from strong interaction the ionic neutral graphene that is not attained for their counterparts, with clear interesting trend accumulation at surface region. Moreover, adsorption energy increases gradually as increase number layers...
We investigate the strong field ionization of argon using counter-rotating 2-color dual-elliptical phase-of-phase spectroscopy. perform a multidimensional control experiment over laser to modulate photoelectron momentum spectra generated under fields. Incorporating classical trajectory Monte Carlo calculation, we study behavior relative phase contrast and clarify how enhancement temporal precision in angular resolution measurements is achieved when corresponds frequency 3 ω . Our results...
We have used scanning tunneling microscopy (STM) to investigate two types of hydrogen defect structures on monolayer graphene supported by hexagonal boron nitride $(h\text{\ensuremath{-}}\mathrm{BN})$ in a gated field-effect transistor configuration. The first H-defect type is created bombarding with 1-keV ionized and identified as atoms bonded vacancy via comparison experimental data first-principles calculations. second H dimerized depositing atomic having only thermal energy onto surface....
Water dimer (H2O)2─a vital component of the earth's atmosphere─is an important prototypical hydrogen-bonded system. It provides direct insights into fundamental chemical and biochemical processes, e.g., proton transfer ionic supramolecular dynamics, occurring in astro- atmospheric chemistry. Exploiting a purified molecular beam water multimass ion imaging, we report simultaneous detection all generated products (H2O)2+ fragmentation following single ionization. Detailed information about...
We report on a new versatile transportable endstation for controlled molecule (eCOMO) experiments providing combination of molecular beam purification by electrostatic deflection and simultaneous ion electron detection using velocity-map imaging (VMI). The $b$-type deflector provides spatial dispersion species based their effective-dipole-moment-to-mass ratio. This enables selective investigation rotational quantum states, conformers, clusters. Furthermore, the double-sided VMI spectrometer...
Water dimer $(\text{H}_2\text{O})_2$ -- a vital component of the earth's atmosphere is an important prototypical hydrogen-bonded system. It provides direct insight into fundamental chemical and biochemical processes, e.g., proton transfer ionic supramolecular dynamics occurring in astro- atmospheric chemistry. Exploiting purified molecular beam water multi-mass ion imaging, we report simultaneous detection all generated products $(\text{H}_2\text{O})^{+}_2$-fragmentation following single...