A5031921197- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Cultural Heritage Materials Analysis
- Mercury impact and mitigation studies
- Advanced Fiber Optic Sensors
- Advanced Chemical Physics Studies
- Heavy metals in environment
- Ion-surface interactions and analysis
- Mass Spectrometry Techniques and Applications
- Photochemistry and Electron Transfer Studies
- Microwave Engineering and Waveguides
- Orbital Angular Momentum in Optics
- Metamaterials and Metasurfaces Applications
- Spectroscopy and Laser Applications
- Antenna Design and Analysis
- Photonic and Optical Devices
- Plasmonic and Surface Plasmon Research
- Antenna Design and Optimization
- Fire dynamics and safety research
- Image and Signal Denoising Methods
- Laser Design and Applications
- Surface Roughness and Optical Measurements
- Healthcare professionals’ stress and burnout
- Fire Detection and Safety Systems
- Resilience and Mental Health
Anhui Normal University
2018-2025
Nanjing University
2025
University of Electronic Science and Technology of China
2021
Wuhan National Laboratory for Optoelectronics
2016-2020
Huazhong University of Science and Technology
2016-2020
University of Science and Technology
2016-2020
Lawrence Berkeley National Laboratory
2020
Shanghai Institute of Quality Inspection and Technical Research
2019
Anhui East China Institute of Optoelectronic Technology (China)
2018
In this study, chemical replacement combined with surface-enhanced laser-induced breakdown spectroscopy (CR-SENLIBS) was for the first time applied to improve detection sensitivities of trace heavy metal elements in aqueous solutions. Utilizing effect, ions solution were enriched on magnesium alloy surface as a solid layer through reacting high activity metallic (Mg) within 1 minute. Unitary and mixed solutions Cu, Pb, Cd, Cr prepared construct calibration curves, respectively. The...
To detect available heavy metals in soil using laser-induced breakdown spectroscopy (LIBS) and improve its poor detection sensitivity, a simple low cost sample pretreatment method named solid–liquid–solid transformation was proposed. By this method, were extracted from through ultrasonic vibration centrifuging then deposited on glass slide. Utilization of Cd Pb elements detected successfully. The results show that the regression coefficients calibration curves for analyses reach to more than...
The complex and serious spectral interference makes it difficult to detect trace elements in soil using laser-induced breakdown spectroscopy (LIBS). To address it, LIBS-assisted by fluorescence (LIBS-LIF) was applied selectively enhance the intensities of interfered lines. Utilizing this selective enhancement effect, all lines could be eliminated. As an example, Pb I 405.78 nm line enhanced selectively. results showed that determination coefficient (R2) calibration curve (Pb concentration...
The matrix effect of powder samples, especially for soil is significant in laser-induced breakdown spectroscopy (LIBS), which affects the prediction accuracy element concentration. In order to reduce this samples LIBS, standard addition method (SAM) based on background removal by wavelet transform algorithm was investigated work. Five different kinds certified reference (lead (Pb) concentrations were 110, 283, 552, 675, and 1141 ppm, respectively) used examine method. root mean square error...
This study discovered the distributional difference of self-absorption effect in laser-induced breakdown spectroscopy, and investigated method to reduce effect.
A simple and convenient method has been developed to improve the LIBS detection performance of a liquid aerosol by adjusting temperature.
On-stream analysis of the element content in ore slurry has important significance control flotation process and full use raw materials. Therefore, techniques that can monitor chemistry slurries online are required. Laser-induced breakdown spectroscopy (LIBS) is one potential approaches to measurements due its capability situ real-time analysis. However, using LIBS for on-stream challenging issues such as surface ripples, sample splashing, sedimentation, etc. To address these problems, we...
Carbon is a key element for steel properties but hard to be determined by laser-induced breakdown spectroscopy (LIBS). Utilizing the combination of carbon in analytes and nitrogen ambient gas generate carbon-nitrogen (CN) radicals, LIBS assisted with radical fluorescence (LIBS-LIRF) was proposed resonantly excite radicals instead atoms plasmas. The CN B2Σ-A2Π band were stimulated 421.60 nm laser wavelength emitted 388.34 fluorescence. results show that spectral intensity enhanced 2 orders...
Nitrogen (N) content is a significant indicator to evaluate eutrophication. The interference of nitrogen in air the biggest hurdle for direct detection N aerosol solution. In...
The photodissociation and photoionization of O2 the subsequent O2+ in wavelength region 200 to 240 nm are reported using resonance enhanced multiphoton ionization (REMPI) velocity map imaging detection. A series two-photon allowed Rydberg states with principle quantum number n = 3–11 converging ground electronic state O2+X2Πg used as doorway reach superexcited three-photon energy range 15.8–18.6 eV. detailed analysis kinetic release anisotropy parameters photofragments extracted from images...
This paper describes the quantitative evaluation of self-absorption reduction minor elements in laser-induced breakdown spectroscopy assisted with laser-stimulated absorption.
A wavelet-based interference correction approach was proposed to improve the accuracy of LIBS quantitative analysis.
An approach of portable laser-induced breakdown spectroscopy based on a fiber laser with background removal method was proposed.
To improve the quantitative analysis accuracy of an aqueous solution using surface-enhanced laser-induced breakdown spectroscopy (SENLIBS), filter paper was used as a transmission medium by placing it onto surface metallic substrate to make microdroplet spreading more uniform in fixed region surface. The trace elements (Cu, Pb, Cd, and Cr) were detected successfully this method. results showed that sample preparation repeatability SENLIBS noticeably improved with aid paper. Moreover, limit...
In this work, a genetic algorithm (GA) was employed to select the intensity ratios of spectral lines belonging target and domain matrix elements, then these selected line-intensity were taken as inputs construct an analysis model based on artificial neural network (ANN) analyze elements copper (Cu) vanadium (V) in steel samples. The results revealed that root mean square errors prediction (RMSEPs) for Cu V can reach 0.0040 wt. % 0.0039 %, respectively. Compared 0.0190 0.0201 conventional...
Liquid surface and liquid aerosol as the traditional forms for laser-induced breakdown spectroscopy (LIBS) inductively coupled plasma (ICP), respectively, have been used to analyze chromium (Cr) cadmium (Cd) elements using LIBS in a solution. The spectral differences, effects of laser energy frequency, accumulated number pulses, gate delay time, quantitative analyses were compared. results showed that demonstrated lower threshold, higher optical emission intensity, single-to-noise ratio....
Optical fiber sensors are used for partial discharge detection in many applications due their advantage of strong anti-electromagnetic interference capability. Multi-point distributed and location important electrical equipment. In this paper, a scheme based on optical Rayleigh backscattering light is experimentally demonstrated. At the same time, extraction algorithm to demodulate signal; furthermore, high-pass filter reduce system low-frequency noise environment noise. It clear that...
Welding metal and semiconductor nanoparticles for preparing metal/semiconductor nanocomposites by selective laser heating with the help of ultrasonic waves.
In this work, the threshold photoionization cross sections from excited states of lutetium and ytterbium atoms were investigated by laser pump–probe scheme under condition saturated resonant excitation. We obtained resonance enhanced multiphoton ionization spectra lanthanide metals in range 307.50–312.50 nm 265.00–269.00 nm, respectively; 5d6s(1D)6p(2D05/2) 5d6s(3D)6p(2P01/2) 4f13(2F0)5d6s2(J = 1) above regions (0.4–1.6 eV) measured, measured values ranged 2.3 ± 0.2 to 17.7 1.5 Mb.
The multiphoton ionization/dissociation dynamics of molecular sulfur (S2) in the ultraviolet range 205–300 nm is studied using velocity map ion imaging (VMI). In this one-color experiment, generated a pulsed discharge and then photodissociated by UV radiation. At three-photon level, superexcited states are accessed via two different resonant states: B3Σu– (v′ = 8–11) valence at one-photon level Rydberg state two-photon level. Among decay processes these states, dissociation to electronically...