Review
Physics, Multidisciplinary
S. S. Harilal, M. C. Phillips, D. H. Froula, K. K. Anoop, R. C. Issac, F. N. Beg
Summary: This article provides an overview of optical diagnostic tools frequently used for the characterization of laser-produced plasmas (LPPs), focusing on the low to moderate laser intensity regime. The review emphasizes the techniques, assumptions, and challenges associated with these diagnostic tools.
REVIEWS OF MODERN PHYSICS
(2022)
Article
Chemistry, Analytical
Fangjian Zhang, Qiuyun Wang, Yuanfei Jiang, Anmin Chen, Mingxing Jin
Summary: Metal nanoparticles (NPs) at different concentrations were deposited on the pure Al substrate surface to enhance the spectral emission of AlO molecular bands. The emission intensity of AlO (0-0) and (1-1) increased and then decreased with the increase of Au NP concentration, reaching the strongest emission at 0.98 ng mL(-1). The time-resolved characteristics of AlO spectra showed different emission intensities and spectral lifetimes at different concentrations of Au NPs, with the strongest peak intensity and longest spectral lifetime observed at 0.98 ng mL(-1) concentration. The vibration temperature of AlO was consistent with the spectral emission and varied with the concentration of Au NPs.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2023)
Article
Materials Science, Multidisciplinary
Abeer S. Altowyan, A. El-Hussein, Hoda A. Ahmed, Hana Hassan Faqih, Ahmed S. Amein, Ayman M. Mostafa, Mohamed M. ElFaham
Summary: This study focuses on the plasma generation of a copper-nickel alloy using different laser wavelengths, and finds that the choice of laser wavelength has a crucial impact on plasma temperature, emphasizing the importance of selecting the right wavelength for analysis.
Article
Materials Science, Multidisciplinary
Abeer S. Altowyan, Hoda A. Ahmed, Hana Hassan Faqih, Ahmed S. Amein, Ayman M. Mostafa, Mohamed M. El Faham, A. El-Hussein
Summary: The research demonstrates the importance of selecting the right laser wavelength in LIBS analysis, as using Cu and Ni spectral lines resulted in different calculated plasma temperatures.
Article
Physics, Applied
M. Dell'Aglio, V. Gardette, S. C. Jantzi, A. De Giacomo
Summary: The research investigates the evolution of Laser Induced Plasma (LIP) in liquid by comparing it with LIP in air, showing that plasma in water remains in a high-density state while plasma in air quickly expands to an ideal state. These differences allow for a wide range of applications for LIP in liquid and gas.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Analytical
S. S. Harilal, C. M. Murzyn, E. J. Kautz, M. K. Edwards, S. I. Sinkov, S. E. Bisson, S. S. Mitra, J. B. Martin
Summary: Results and analysis from laser ablation experiments were used to study high-temperature plutonium (Pu) spectroscopy and gas-phase oxidation. Time-resolved emission spectra were compared to a Pu I spectral model to infer plasma temperature. At later times in the plasma evolution, lower temperatures and resonant emission bands indicative of molecular species, possibly plutonium oxides (PuxOy), were observed.
JOURNAL OF ANALYTICAL ATOMIC SPECTROMETRY
(2021)
Article
Spectroscopy
Emily H. Kwapis, Eliel Villa-Aleman, Kyle C. Hartig
Summary: This research aims to investigate the influence of atmospheric conditions and oxidation reactions on the spectroscopic characteristics of laser-induced plutonium surrogate plasmas. Time-resolved spectra of nanosecond laser ablation cerium plasmas were measured in various atmospheres containing different concentrations of oxygen. The results showed that in oxygen-rich environments, the presence of CeO decreased from around 60 & mu;s to 50 & mu;s, and significant growth of CeO molecular emission bands was observed. The formation and depletion of CeO in the laser-produced plasma were further studied using integrated intensities of the CeO D1-X1 transition and strong atomic Ce peaks.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2023)
Article
Spectroscopy
N. L. LaHaye, S. S. Harilal, M. C. Phillips
Summary: Optical emission spectroscopy and laser absorption spectroscopy are complementary techniques for diagnosing plasmas, allowing comprehensive characterization of parameters such as temperature and density. By combining these two methods, a greater understanding of plasma behavior can be achieved over its entire evolution.
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2021)
Article
Physics, Fluids & Plasmas
Wei Qi, Qiuyun Wang, Junfeng Shao, Anmin Chen, Mingxing Jin
Summary: The experimental study revealed that increasing the target temperature enhances the intensity of molecular emission in femtosecond laser-induced breakdown spectroscopy (LIBS), particularly the AlO molecular emission from aluminum. Additionally, simulation results showed that both electron and lattice temperatures of aluminum increase as the initial target temperature rises.
PLASMA SCIENCE & TECHNOLOGY
(2021)
Article
Optics
S. Shilpa, Pramod Gopinath
Summary: The dynamics of heterogeneous angularly colliding (Al-Cu) laser-produced plasmas with varying input laser pulse energies on each target are studied. The formation and composition of intermetallic compounds are analyzed using advanced techniques, showing the potential for flexible control over the deposition process.
APPLIED PHYSICS B-LASERS AND OPTICS
(2023)
Article
Optics
Fangyuan Liang, Jingge Wang, Xiaoqing Fu, Hui Wang
Summary: This study investigates the impact of laser focusing on the characteristics of laser-induced plasma. By comparing plasma images and spectral emission spectra obtained at different defocusing distances, the effect of F-number of focusing lenses on the plasma on steel alloy is studied. The results demonstrate that the defocusing distance influences the plasma morphology and spectral line intensity. The optimal defocusing distance shows a correlation with the F-number.
Article
Physics, Fluids & Plasmas
Qiuyun Wang, Hongxia Qi, Xiangyu Zeng, Anmin Chen, Xun Gao, Mingxing Jin
Summary: This paper investigates the time-resolved spectroscopy of collinear femtosecond and nanosecond dual-pulse laser-induced plasmas, comparing the effects of different pulse sequences on copper plasma. It was found that when the femtosecond laser was fired first, the resulting plasma had higher intensity and longer lifetime.
PLASMA SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Vivek Tiwari
Summary: Coherent multidimensional spectroscopies have been implemented across different regions of the electromagnetic spectrum over the past two decades, providing new insights into molecular scale phenomena. Recent technological developments have enabled higher spatial resolution while addressing issues caused by ensemble averaging.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Physics, Applied
Elizabeth J. Kautz, Mark C. Phillips, Sivanandan S. Harilal
Summary: In this study, laser-induced fluorescence (LIF) was utilized to enhance emission signals from plasma generated by ultrafast laser filaments on an Al 6061 alloy target. This approach effectively reduced self-reversal features and improved detection sensitivity for standoff and remote element and isotope detection. The findings highlight the potential of LIF for boosting signal-to-noise ratio in filament-induced breakdown spectroscopy applications.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Optics
Youchan Park, Kyeongsun Kim, Seonwoong Kim, Campbell D. Carter, Hyungrok
Summary: Nanosecond laser pulses can be modulated by seeding electrons, which are generated through auxiliary laser-induced breakdown. The amount of seeded electrons and modulation of the laser pulse are controlled by the inverse Bremsstrahlung photon absorption process.
Article
Chemistry, Physical
Yang Gao, Yun Shen Zhou, Min Qian, Xiang Nan He, Jody Redepenning, Paul Goodman, Hao Ming Li, Lan Jiang, Yong Feng Lu
Article
Materials Science, Multidisciplinary
L. S. Fan, Z. Q. Xie, J. B. Park, X. N. He, Y. S. Zhou, L. Jiang, Y. F. Lu
JOURNAL OF LASER APPLICATIONS
(2012)
Article
Nanoscience & Nanotechnology
M. Mahjouri-Samani, Y. S. Zhou, X. N. He, W. Xiong, P. Hilger, Y. F. Lu
Article
Nanoscience & Nanotechnology
X. N. He, Y. Gao, M. Mahjouri-Samani, P. N. Black, J. Allen, M. Mitchell, W. Xiong, Y. S. Zhou, L. Jiang, Y. F. Lu
Article
Optics
L. B. Guo, B. Y. Zhang, X. N. He, C. M. Li, Y. S. Zhou, T. Wu, J. B. Park, X. Y. Zeng, Y. F. Lu
Article
Optics
L. B. Guo, Z. Q. Hao, M. Shen, W. Xiong, X. N. He, Z. Q. Xie, M. Gao, X. Y. Li, X. Y. Zeng, Y. F. Lu
Article
Optics
X. Huang, X. N. He, W. Xiong, Y. Gao, L. J. Jiang, L. Liu, Y. S. Zhou, L. Jiang, J. F. Silvain, Y. F. Lu
Article
Optics
L. Liu, S. Li, X. N. He, X. Huang, C. F. Zhang, L. S. Fan, M. X. Wang, Y. S. Zhou, K. Chen, L. Jiang, J. F. Silvain, Y. F. Lu
Article
Spectroscopy
X. N. He, Z. Q. Xie, Y. Gao, W. Hu, L. B. Guo, L. Jiang, Y. F. Lu
SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
(2012)
Article
Spectroscopy
W. Hu, L. E. Agelet, X. K. Shen, X. N. He, H. Huang, Y. F. Lu
Summary: The study found that with the increase of pulse energy, the degree of self-reversal of sodium D lines in soil samples first increases then rapidly decreases, indicating the possibility of avoiding this phenomenon actively.
JOURNAL OF APPLIED SPECTROSCOPY
(2021)
Article
Nanoscience & Nanotechnology
Wanglin Qiu, Xiangnan He, Zeming Fang, Yaohui Wang, Ke Dong, Guoquan Zhang, Xuguang Xu, Qi Ge, Yi Xiong
Summary: This study proposes a method to lock the actuated state of liquid crystal elastomers (LCEs) through rapid cooling, achieving the goal of maintaining their reversible performance at room temperature. Tunable shapes can be achieved by modulating the cooling rate.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Computer Science, Artificial Intelligence
Zihao Zhao, Jiawei Chen, Sheng Zhou, Xiangnan He, Xuezhi Cao, Fuzheng Zhang, Wei Wu
Summary: Recommender systems often face popularity bias, where the collected interaction data shows imbalanced distribution. Existing methods mainly focus on eliminating popularity bias without considering the impact of item quality. In this paper, we propose a Time-aware DisEntangled framework (TIDE) that leverages temporal information to differentiate between item quality and conformity. Experimental results on real-world datasets demonstrate the effectiveness of TIDE.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Hanzheng Xing, Xiangnan He, Yujia Wang, Xuan Zhang, Lei Li, Yecheng Wang, Zekun Cheng, Hui Wu, Qi Ge, Xiaoyan Li
Summary: The study successfully synthesized 3D-printable hydrogel composites reinforced by aramid nanofibers. Compared with pure hydrogels, the composites showed higher strength, modulus, and fatigue threshold while maintaining a large elongation-at-break. These improvements were attributed to the hybrid polymer networks in the composites and the effects of chain entanglement, hydrogen bonding, and phase separation.
Article
Physiology
Kim Cluff, Abby M. Kelly, Panagiotis Koutakis, Xiang N. He, Xi Huang, Yong Feng Lu, Iraklis I. Pipinos, George P. Casale, Jeyamkondan Subbiah
PHYSIOLOGICAL REPORTS
(2014)
Proceedings Paper
Optics
Tongqing Liu, Ming Han, Cody Raml, Dennis R. Alexander, Xiangnan He, Yongfeng Lu
NEXT-GENERATION SPECTROSCOPIC TECHNOLOGIES V
(2012)
