A5034590359- Advanced Chemical Physics Studies
- Atomic and Molecular Physics
- Cold Atom Physics and Bose-Einstein Condensates
- Laser-induced spectroscopy and plasma
- Electron and X-Ray Spectroscopy Techniques
- Quantum optics and atomic interactions
- Mass Spectrometry Techniques and Applications
- Atomic and Subatomic Physics Research
- Inorganic Fluorides and Related Compounds
- Diamond and Carbon-based Materials Research
- Hepatitis B Virus Studies
- Diabetes Management and Education
- Force Microscopy Techniques and Applications
- Luminescence Properties of Advanced Materials
- Analytical chemistry methods development
- Lanthanide and Transition Metal Complexes
- Chronic Disease Management Strategies
- Rare-earth and actinide compounds
- Heavy Metals in Plants
- Quantum chaos and dynamical systems
- Inorganic Chemistry and Materials
- Advanced Fiber Laser Technologies
- Laser-Matter Interactions and Applications
- Cultural Heritage Materials Analysis
- Viral Infections and Vectors
Tianjin University of Technology
2012-2024
Plano Cancer Institute
2022-2024
Shanghai First Maternity and Infant Hospital
2020
Jiangmen Central Hospital
2020
Tianjin Medical University
2019-2020
University of Science and Technology of China
2016-2019
Punan Hospital
2019
Guangzhou Blood Center
2019
Chinese Academy of Sciences
1999-2017
CAS Key Laboratory of Urban Pollutant Conversion
2016-2017
The intermolecular interaction of the benzene−water complex is calculated using real-space pseudopotential density functional theory utilizing a van der Waals functional. Our results for potential energy surface clearly show stable configuration with water molecule standing above or below benzene one both H atoms pointing toward plane, as predicted by previous studies. However, when pulled outside perimeter ring, becomes unstable, attaching in saddle point to rim its O atom adjacent H. We...
The near-infrared (NIR) optical pumped photophysics of nitrogen vacancy (NV) center in diamond was experimentally studied by considering both the charge state conversion and stimulated emission. We found that NIR laser can help to highly enhance rate, which be applied improve performance depletion nanoscopy. Using a doughnut-shaped visible beam Gaussian-shaped for manipulation, we developed low power nanoscopy NV center. A spatial resolution 14 nm achieved with intensity approximately three...
Six cold medications with similar compositions were identified using t-SNE and BPNN combined laser-induced breakdown spectroscopy.
Abstract A method for restoring fadable ink writings using laser-induced breakdown spectroscopy (LIBS) combined with machine learning was proposed. This research employed dimensionality reduction and clustering analysis to process LIBS data, significantly improving analytical efficiency accuracy. Unlike traditional chemical detection methods, this approach minimizes damage samples while ensuring operator safety. Compared physical restoration techniques, it achieves higher accuracy lower...
High spatial resolution and low perturbation are required for mapping the electromagnetic field at nanoscale, to provide crucial information about local light-matter interaction. Using optical superresolution microscopy detection via a nitrogen-vacancy center in diamond, this work demonstrates far-field noninvasive sensing of with high accuracy approximately 50 nm. As is sensitive various physical quantities, multifunctional quantum nanoscope anticipated.
Abstract Tea ash is the inorganic residue of tea after a series chemical and physical reactions under high temperature environment. The compositions are very different. In addition, closely related to quality tea. this work, Tieguanyin were analyzed by laser-induced breakdown spectroscopy (LIBS), differences elements in qualitatively. contains main elements, such as Ca, Na, Mg, K, trace Fe, Cu, Zn, Mn Sr, other metallic Al, Li Ba. Comparing atomic ionic lines LIBS spectra ash, it was found...
Neutral and anion clusters of copper, Cu(n) (n=3-11), are examined using real space pseudopotentials constructed within the local spin density approximation. We predict ground state structure for each cluster, binding energy, corresponding photoelectron spectra, which we compare to experiment. find strong final effects in especially smaller clusters. The energy as a function cluster size tracks well with measured values, although magnitude exceeds experimental values by approximately 20%, expected
After publication of the research paper[...]
We report ab initio calculations for the electronic and structural properties of Vn, Vn−, Vn+ clusters up to n=8. performed using a real-space pseudopotential method based on local spin density approximation exchange correlation. This assumes no explicit basis. Wave functions are evaluated uniform grid; only one parameter, grid spacing, is used control convergence properties. Charged states easily handled in real space, contrast methods supercells where Coulombic divergences require special...
We report a method to uncover the peaks due scattering of quadratic Zeeman orbits by atomic core many-electron atom. The is experimental, and consists in identifying supernumerary scaled-energy spectra comparing them with corresponding hydrogenic calculations using closed-orbit theory. scaled actions observed additional correspond combining individual closed orbits, except for small blueshift, which explainable as core-induced interaction, depending on penetration orbits. Our related earlier...
Hepatitis B virus (HBV) vaccination is regarded as the most economical and effective method for prevention control of HBV infection, a major global health problem. Previous studies have suggested that there may be sex‑specific differences regarding immune response to vaccine in humans; however, mechanisms associated with these are yet elucidated. In present study, sex‑based immunological mice following were investigated determine underlying sexual dimorphism, aim identifying potential...
CaO and CN molecular lines were applied to detection of lead chrome green in Tieguanyin tea combined with principal component analysis laser-induced breakdown spectroscopy.
Abstract The urban rail transit (URT) system in China has undergone development spanning over 50 years. In the period from 2008 to 2015, numerous URT lines were under construction. After an increasing number of cities have transitioned multi-line network operations, with greater emphasis on efficiency and passenger service. This transition been accompanied by successful innovations applications aimed at enhancing intelligence automation. paper provides a review operational statistics based...
Single-photon flux is one of the crucial properties nitrogen vacancy (NV) centers in diamond for its application quantum information techniques. Here we fabricate conical nanowires to enhance single-photon count rate. Through interaction between tightly confined optical mode and NV centers, lifetime much shortened collection efficiency enhanced. As a result, detected rate can be at 564 kcps, total detection coefficient 0.8%, which higher than that bulk diamond. Such nanowire device with high...
We report the results of an ab initio study photoelectron spectra copper and vanadium anionic clusters. Our calculations are performed using a real-space pseudopotential approach based on density-functional theory, include final state effects. For each size cluster, we find lowest energy structure. The calculated spectra, these ground structures, reproduce main features those obtained by experiment. demonstrate that techniques advantageous for electronic structural properties transition metals
A velocity-map-imaging (VMI) method is employed to investigate systematically the dynamical process of ejected electrons from autoionizing states Eu atom for first time as far we know. An excited stepwise 4f76s6s8 S7/2 ground state 4f76s8s8 P7/2 Rydberg via 4f76s6p6 P5/2 intermediate state, then further 4f76p1/2(J=3)8s and 4f76p1/2(J=4)8s using three-step isolated-core excitation method. According pathways selection rules, value total angular momentum can be calculated. The energy...
The spectra of 4f76p1/2(J = 3 or 4)8s, 4)6d and 4f75dnl autoionizing states the europium atom are investigated using resonance-ionization spectroscopy method via same intermediate state, 4f76s(9S4o)8s 8S7/2. profound interaction among different Rydberg series is observed in this work. fingerprints 4f75d(7D)n′l′ identified from complex structures autoionization 4)8s states. information these states, such as their level energy, line width, also provided.
In this paper, we present a new method to determine the first ionization limit of europium atom. Firstly, time delayed field is used detect highly excited Rydberg states Secondly, reversed static electric exclude ion signal from photoionization, autoionization and other path. The law shift atom in studied. First zero deduced data field. This value well coincident with reported values by methods.
We examine the electronic and magnetic structure of negatively charged iron clusters: ${\mathrm{Fe}}_{n}^{\ensuremath{-}}$ $(n=3--6)$. use real-space pseudopotentials constructed within local spin density approximation. This approach does not require an explicit basis. Moreover, it supercells to describe localized systems. As such, clusters can be examined without compensating backgrounds. For each cluster, we find ground state concurrent properties. also calculate photoelectron spectra,...
We observe strong energy-dependent quantum defects in the scaled-energy Stark spectra for |M| = 1 Rydberg states of barium atoms at three scaled energies: ε –2.000, –2.500 and –3.000. In an attempt to explain observations, theoretical calculations closed orbit theory based on a model potential including core effect are performed non-hydrogenic atoms. While such has been uniformly successful alkali with single valence electron, it fails match experimental results 6snp two electrons. Our study...
The measurement of the second-order degree coherence [g(2)(τ)] is one important methods used to study dynamical evolution photon-matter interaction systems. Here, we use a nitrogen-vacancy center in diamond compare g(2)(τ) with two methods. One prototype process tunable delay. other start-stop based on time-to-amplitude conversion (TAC) and multichannel analyzer (MCA) system, which usually applied achieve efficient measurements. divergence results observed when delay time comparable mean...
The branching ratios of ions and the angular distributions electrons ejected from Eu 4f76p1/2nd auto-ionizing states are investigated with velocity-map-imaging technique. To populate above states, relevant bound Rydberg have to be detected first. Two new identified in region between 41150 cm−1 44580 cm−1, which auto-ionization spectra observed isolated core excitation method. With all preparations above, different final ionic these processes measured systematically. Energy dependence...