Review
Chemistry, Analytical
Sarmila Amatya Shrestha, Sangwon Cha
Summary: The paper reviews the application of ambient desorption/ionization mass spectrometry in the direct analysis of solid materials, covering various sampling and desorption processes. Real-world analysis cases include pharmaceuticals, food products, forensic analysis, and surface contaminant analysis. ADI techniques provide efficient and simplified methods for direct desorption and ionization of analytes from untreated samples under ambient conditions.
TRAC-TRENDS IN ANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Physical
Fengli Liang, Po-hung Tseng, Qiang Sun, Mengran Li, Wei Zhou, Lian X. Liu, Hao Wang, Zhonghua Zhu
Summary: This study presents a novel method to assemble SrCo0.4Fe0.5W0.1O3-δ cathode directly onto YSZ electrolyte using a highly efficient microwave plasma technique, achieving intimate contact and notably high ORR performance. The method is also effective in assembling other MIEC perovskite cathodes, enhancing cathode performance significantly.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Engineering, Mechanical
Shafquat T. Islam, Wentao Ma, John G. Michopoulos, Kevin Wang
Summary: The generation of plasma from hypervelocity impacts in a fluid medium is studied using a multiphysics computational modeling approach. The behavior of the dynamic fluid-solid interaction that causes fluid ionization is predicted in a specific case of a copper rod impacting on a soda lime glass target in a neon gas environment.
EXTREME MECHANICS LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Sean Brown, Saleh Ahmat Ibrahim, Brandon R. Robinson, Ashley Caiola, Sarojini Tiwari, Yuxin Wang, Debangsu Bhattacharyya, Fanglin Che, Jianli Hu
Summary: A novel reactor methodology was developed for chemical looping ammonia synthesis using microwave plasma for pre-activation of dinitrogen. The reactions benefit from higher production of activated species, modularity, quick startup, and lower voltage input. Simple, economical, and environmentally benign metallic iron catalysts were used, and both surface mediated and bulk-mediated reaction domains were found to exist. Transition metal catalysts and their kinetics were also evaluated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Alexander B. Tesler, Lucia H. Prado, Marat M. Khusniyarov, Ingo Thievessen, Anca Mazare, Lena Fischer, Sannakaisa Virtanen, Wolfgang H. Goldmann, Patrik Schmuki
Summary: Wetting is a common surface phenomenon with a significant impact on human life. Silicone-based chemistry may serve as a real alternative to banned fluorinated compounds and costly silane-based compounds. Grafting polydimethylsiloxanes to substrates under UV light illumination can create stable lubricant-infused slippery surfaces, offering a simple, fast, scalable, environmentally friendly, and low-cost approach.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Environmental Sciences
Ziyao Jie, Cheng Liu, Daolu Xia, Guixin Zhang
Summary: A low-power microwave plasma torch (MPT) was used to treat and vitrify solid waste, showing lower power demand and heat loss compared to conventional thermal plasma technology. By adding specified ratios of discarded glass scraps, the residual ash of solid waste can be vitrified. Through experiments, it was found that the microwave plasma treatment process can convert 96 wt.% of solid waste into nonpolluting gases.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Review
Spectroscopy
Hanlu Yue, Feiyao He, Zhongjun Zhao, Yixiang Duan
Summary: Ambient mass spectrometry (AMS) is a group of advanced analytical techniques that enable direct sampling and ionization of analytes in their native environment, offering advantages such as rapid and real-time analysis. Plasma-based AMS, as a significant category of AMS, has been widely applied in various fields and has undergone continuous development and innovation.
MASS SPECTROMETRY REVIEWS
(2023)
Article
Multidisciplinary Sciences
Constantin Bernert, Stefan Assenbaum, Florian-Emanuel Brack, Thomas E. Cowan, Chandra B. Curry, Marco Garten, Lennart Gaus, Maxence Gauthier, Sebastian Goede, Ilja Goethel, Siegfried H. Glenzer, Thomas Kluge, Stephan Kraft, Florian Kroll, Michael Kuntzsch, Josefine Metzkes-Ng, Markus Loeser, Lieselotte Obst-Huebl, Martin Rehwald, Hans-Peter Schlenvoigt, Christopher Schoenwaelder, Ulrich Schramm, Mathias Siebold, Franziska Treffert, Tim Ziegler, Karl Zeil
Summary: Due to the non-linear nature of relativistic laser induced plasma processes, precise numerical modeling is required for the development of laser-plasma accelerators. This study successfully utilized an off-harmonic optical probe laser setup to investigate the interaction of a high-intensity laser with a solid-density cylindrical cryogenic hydrogen jet target. The experimental observations were supported by three dimensional particle-in-cell simulations.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Mechanical
Shafquat T. Islam, Wentao Ma, John G. Michopoulos, Kevin Wang
Summary: Previous studies on hypervelocity impact mainly focused on the solid materials, while this paper presents a computational model that considers the surrounding fluid, including its dynamics, thermodynamics, and ionization. The model tracks the interfaces between the projectile, target, and surrounding fluid and accounts for large deformations and contact. The simulations show that the ambient gas can contribute to the formation of plasma in hypervelocity impact events.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2023)
Article
Chemistry, Analytical
Fengjian Chu, Gaosheng Zhao, Wangyu Li, Wei Wei, Weiwei Chen, Zihan Ma, Zhan Gao, Nazifi Sani Shuaibu, Jikui Luo, Bingwen Yu, Hongru Feng, Yuanjiang Pan, Xiaozhi Wang
Summary: A microwave plasma torch-based ion/molecular reactor (MPTIR) has been developed for rapid oxidation reactions. This device can activate oxygen in the air to achieve oxidation of thioethers, alcohols, and various environmental pollutants on a millisecond scale without the use of external oxidants or catalysts. It can also accurately predict environmental pollutants and study the mechanism of atmospheric oxidative processes.
ANALYTICAL CHEMISTRY
(2023)
Article
Physics, Applied
Panpan Shu, Pengcheng Zhao
Summary: The breakdown phenomena of air, nitrogen, and helium by microwaves at atmospheric pressure were studied by solving the theoretical model. Simulation results showed that filamentary plasma arrays were generated in air and nitrogen breakdown, but disappeared completely in helium breakdown due to different transport coefficients and wave scattering behaviors. The qualitative agreement between simulated plasma patterns in the three gases and experimental results was observed, with the plasma propagation speed in nitrogen breakdown simulation matching closely with experimental data.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Analytical
Lucia Bartella, Marcos Bouza, Priscilla Rocio-Bautista, Leonardo Di Donna, Juan F. Garcia-Reyes, Antonio Molina-Diaz
Summary: Ambient mass spectrometry is an alternative to classical mass spectrometry that allows fast, in-situ, and high-throughput analysis of samples with minimal sample pretreatment. This study explores the capability of different ambient ionization sources to analyze raw wine for quality control purposes. The spectra obtained from these sources showed the ability to classify and differentiate wine samples based on various compounds, including organic acids, phenolic acids, derivatives, and low-molecular-mass flavonoids. The plasma-based methods offer the advantage of solventless analysis, while the paper spray (PS) approach provides a richer MS profile.
MICROCHEMICAL JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Yuting Li, Yuhan Yang, Zhijun Huang, Zewei Luo, Cheng Qian, Yinjun Li, Yixiang Duan
Summary: This study demonstrated the use of MIPDI for the first time to prepare low molecular weight chitosan, showing that the method is fast, efficient, and improves the antimicrobial properties of chitosan.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Physics, Applied
Jie Yang, Zhaoquan Chen, Tao Dai, Sile Chen, Weiye Wang, Qingchun Su, Lu Zhang, Bing Wang, Yuming Zhou, Xinpei Lu
Summary: In this study, a dual-channel pulsed microwave coaxial resonant discharge device was constructed to generate atmospheric pressure pulsed microwave He plasma jet and spatially layered He/N-2 plasma jet. The spatiotemporal ionization evolution process of the He/N-2 plasma jet was determined in experiments. These results provide important references for better understanding the physical characteristics of gas plasma jets.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Pharmacology & Pharmacy
Wei Zhou, Martyna N. Wieczorek, Runshan Will Jiang, Janusz Pawliszyn
Summary: The direct coupling of solid-phase microextraction (SPME) to mass spectrometry (MS) has proven to be effective for the fast screening and quantitative analysis of compounds in complex matrices. The development of three novel SPME-MS techniques and a comprehensive comparison of these technologies were conducted. The comparative analysis helps determine the best option for various applications.
JOURNAL OF PHARMACEUTICAL ANALYSIS
(2023)
Article
Chemistry, Analytical
Kenyon M. Evans-Nguyen, Amanda Quinto, Tiffanie Hargraves, Hilary Brown, Jennifer Speer, David Glatter
ANALYTICAL CHEMISTRY
(2013)
Article
Chemistry, Analytical
Hang Hu, Ruichuan Yin, Hilary M. Brown, Julia Laskin
Summary: This study introduces an unsupervised spatial segmentation approach that combines multivariate clustering and univariate thresholding to effectively segment mass spectrometry imaging (MSI) data, demonstrating its performance and robustness on two tissue sections data sets acquired with different spatial resolutions. The resulting segmentation maps are easy to interpret and project onto the known anatomical regions of the tissue.
ANALYTICAL CHEMISTRY
(2021)
Article
Environmental Sciences
Hilary M. Brown, Patrick W. Fedick
Summary: 3D-PCSI-MS is a rapid method for detecting trace PFAS in solid media through ambient ionization mass spectrometry, with advantages of low cost, scalability, and high-throughput screening of bulk samples without sample preparation.
Article
Multidisciplinary Sciences
Hilary M. Brown, Karan R. Doppalapudi, Patrick W. Fedick
Summary: Confined volume systems can accelerate chemical reactions, reduce waste, save time, and lower costs. This study demonstrates the application of acceleration techniques in improving synthetic routes, discovering novel reactions, and screening cage structure intermediates through exploration of different confined volume systems.
SCIENTIFIC REPORTS
(2021)
Article
Physics, Atomic, Molecular & Chemical
Hilary M. Brown, Trevor J. McDaniel, Christopher P. West, Ebenezer H. Bondzie, Matthew R. Aldeman, Brian T. Molnar, Christopher C. Mulligan, Patrick W. Fedick
Summary: 3D-printed cone spray ionization-mass spectrometry (3D-PCSI-MS) is an ambient ionization technique developed for rapid, in-situ analysis of bulk solids and trace analytes within solid matrices. Material selection, cone geometry, and manufacturing parameters were discussed, and an autosampler was developed for improved sample throughput and automated analysis.
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
(2022)
Article
Chemistry, Analytical
Hilary M. Brown, Trevor J. McDaniel, Karan R. Doppalapudi, Christopher C. Mulligan, Patrick W. Fedick
Summary: CWAs are toxic chemicals used as weapons and prohibited under the Chemical Weapons Convention, but the threat of deployment remains. 3D-PCSI technology provides a rapid, simple, and cost-effective method for detecting trace CWAs in soil matrices.
Article
Chemistry, Analytical
Hilary Brown, Berk Oktem, Ashley Windom, Vladimir Doroshenko, Kenyon Evans-Nguyen
FORENSIC CHEMISTRY
(2016)
Review
Chemistry, Analytical
Hilary M. Brown, Trevor J. McDaniel, Patrick W. Fedick, Christopher C. Mulligan
ANALYTICAL METHODS
(2020)