A5043494682- Laser-induced spectroscopy and plasma
- Analytical chemistry methods development
- Mercury impact and mitigation studies
- Cultural Heritage Materials Analysis
- Marine and coastal ecosystems
- Spectroscopy and Chemometric Analyses
- Luminescence Properties of Advanced Materials
- Laser-Ablation Synthesis of Nanoparticles
- Marine Biology and Ecology Research
- Mass Spectrometry Techniques and Applications
- Optical measurement and interference techniques
- Ocean Acidification Effects and Responses
- Advanced Measurement and Detection Methods
- Laser Material Processing Techniques
- Hydrocarbon exploration and reservoir analysis
- Spectroscopy Techniques in Biomedical and Chemical Research
- Identification and Quantification in Food
- Ion-surface interactions and analysis
- Oceanographic and Atmospheric Processes
- Analog and Mixed-Signal Circuit Design
- ZnO doping and properties
- Gas Sensing Nanomaterials and Sensors
- Radio Frequency Integrated Circuit Design
- Diamond and Carbon-based Materials Research
- GaN-based semiconductor devices and materials
Ocean University of China
2016-2025
Beijing Survey and Design Institute (China)
2024
Qingdao National Laboratory for Marine Science and Technology
2020-2024
Nanjing University of Information Science and Technology
2021-2024
Northeast Electric Power University
2024
Nankai University
2023
Shanxi University
2023
University of Chinese Academy of Sciences
2022
Shandong Institute of Automation
2022
Chinese Academy of Sciences
2022
The influences of laser focusing geometry on laser-induced plasma and breakdown spectroscopy (LIBS) in bulk water are investigated by using fast imaging spectroscopic techniques.
It is a big challenge to apply laser induced breakdown spectroscopy (LIBS) ocean in situ detection, but there are ample opportunities for LIBS development too. In the present work, laboratory investigations of on natural seawater at different pressures from 0.1 40 MPa were carried out. Pressure and pulse energy effects emission investigated. The result showed that enhanced can be obtained under elevated ambient pressure conditions. line broadening lines increases as function pressure. time...
Laser focusing geometry effects on plasma emissions in bulk water were investigated with five angles ranging from 11.9° to 35.4°. Fast imaging and space-resolved spectroscopy techniques used observe the emission distributions fluctuations. We demonstrated that by increasing angle, discrete irregular formed multiple sites could be turned into continuous stable single core fixed at laser focal point. This indicates key role of angle stabilization positions, which is crucial improvement...
Calibration models have been developed for determination of trace elements, silver instance, in soil using laser-induced breakdown spectroscopy (LIBS). The major concern is the matrix effect. Although it affects accuracy LIBS measurements a general way, effect appears accentuated because large variation chemical and physical properties among different soils. purpose to reduce its influence such way an accurate soil-independent calibration model can be constructed. At same time, should...
Augmented reality and visual (AR VR) microdisplays require micro light emitting diodes (μLEDs) with an ultrasmall dimension (≤5 μm), high external quantum efficiency (EQE), narrow spectral line width. Unfortunately, dry etching which is the most crucial step for fabrication of μLEDs in current approaches introduces severe damages, seem to become insurmountable challenge achieving EQE. Furthermore, it well-known that InGaN layers as region naturally exhibit significantly broad width, becomes...
Abstract Temperature determination of laser-induced plasma generated in water is great importance for a better understanding underwater breakdown spectroscopy as well plasma-based techniques. In this work, we measured the temperature by using optical emission spectroscopy. The was calculated respectively from Saha-Boltzmann plot Ca I 422.67 nm, II 393.37 and 396.85 nm lines, OH molecular band A2Σ+−X2Π around 310 nm. It shows that time window 75 ns to 700 ns, decreases 12700 K 7700 K, which...
The characteristics of underwater laser-induced plasma and the corresponding LIBS signals rely greatly on configurations laser focusing optics. In this work, we investigated influences focusing...
Recently, molecular emissions from the laser-induced plasma in ambient gas have gained increasing interest; however, very little is known about case water solutions. In this work, we investigated spatiotemporal characteristics of emissions, CaOH for instance, underwater breakdown spectroscopy (LIBS) by using time-resolved spectroscopy, spectral-resolved imaging, and shadowgraph techniques. It was shown that clear bands can be observed spectrum at early times after laser pulse presented a...
A normalization method for underwater LIBS signals by using a synchronous plasma image is proposed and used quantitative analysis.
In recent years, the investigation and exploitation of hydrothermal region polymetallic mineral areas has become a hot topic. The emergence underwater vehicle platforms made it possible for new chemical sensors to be applied in marine in-situ detection. Laser-induced breakdown spectroscopy (LIBS), with its advantages rapid real-time analysis, sampling without pretreatment, simultaneous multi-element detection stand-off detection, great potential applications. this paper, newly more compact...
This work simultaneously measured the acoustic signals, plasma images, and LIBS spectra from an underwater compared three external normalization strategies using acoustic-image combination.
Temporal and spatial evolutions of the laser-induced plasma in bulk water are investigated using fast imaging emission spectroscopic techniques. By tightly focusing a single-pulse nanosecond Nd: YAG laser beam into water, we generate strongly expanded with high reproducibility. Such strong expanding enables us to obtain well-resolved spectral lines by means position-selective detection; hence, time-gated detector becomes abdicable. The present results suggest not only possible non-gated...
Nitric oxide (NO) is an atmospheric pollutant and climate forcer as well a key intermediary in the marine nitrogen cycle, but ocean's NO contribution production mechanisms remain unclear. Here, high-resolution observations were conducted simultaneously surface ocean lower atmosphere of Yellow Sea East China Sea; moreover, from photolysis microbial processes was analyzed. The sea–air exchange showed uneven distributions (RSD = 349.1%) with average flux 5.3 ± 18.5 × 10–17 mol cm–2 s–1. In...