Article
Physics, Fluids & Plasmas
Xiaoqin Ma, Yaogong Wang, Lichi Chen, Long Hu, Wenjiang Wang, Xiaoning Zhang, Chunliang Liu
Summary: This study investigates the improvement of discharge properties by decorating a microcavity array device with silicon nanowires (SiNWs). The experimental results show that the device decorated with SiNWs has higher total current, mean current, and decreased ignition voltage compared to the conventional device. The mechanism of microplasma property enhancement through the electric field enhancement effect at SiNWs cap and initial seed electrons emitted from SiNWs is discussed.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Optics
Jiayu Zhao, Feifan Zhu, Yongpeng Han, Qining Wang, Li Lao, Xiaofeng Li, Yan Peng, Yiming Zhu
Summary: This study proposes a method of using ubiquitous air as a restorable medium for manipulating light-guiding-light (LGL) signals. By creating plasma filament arrays in the air through femtosecond laser beams, terahertz (THz) pulses can be guided and the all-optical stage can be rapidly reconfigured.
Article
Optics
Shengxian Shi, Chengshuai Yu, Hongyu Zhou, Rui Wang, Zhou Zhao, Yu Ji, T. H. New, Fei Qi
Summary: A line-scan-based light-field imaging framework is proposed, which records lines of a light-field image successively to improve its spatial resolution. In this new method, a cylindrical microlens array replaces the traditional square or hexagonal one, preserving the spatial resolution along the cylindrical axis while recording angular information in the direction perpendicular to it. By capturing multiple rows of light-field images and constructing a high-resolution two-dimensional image, it is demonstrated that line-scan light-field imaging can significantly improve spatial resolutions and serve as an alternative for fast three-dimensional inspections.
Article
Optics
Doo-Hee Cho, Young-Sam Park, Sukyung Choi, Hyunsu Cho, Byoung-Hwa Kwon, Jin-Wook Shin, Nam Sung Cho
Summary: This study demonstrates the successful fabrication of a double-layer nano-structure on silicon nitride using a dry process. The integration of this nano-structure in OLED encapsulation material enhances current efficiency and improves the display performance.
Article
Physics, Multidisciplinary
Hirofumi Yanagisawa, Markus Bohn, Hirotaka Kitoh-Nishioka, Florian Goschin, Matthias F. Kling
Summary: Single-molecule electron sources, driven by constant electric fields and about 1 nm in size, exhibit unique emission patterns like crosses or two-leaf patterns. By illuminating these sources with femtosecond light pulses, we discovered highly modulated emission patterns originating from single-molecule molecular orbitals, solving a longstanding question. Our simulations achieved subnanometric optical modulation of an electron source through variations in the molecular orbitals of single molecules.
PHYSICAL REVIEW LETTERS
(2023)
Article
Chemistry, Analytical
Fujian Xu, Yongzhen Liu, Xingli Liu, Jiong Tan, Hui Xia, Mengtian Li
Summary: The piezoelectric transformer-driven microplasma (PTM) was used as an excitation source for miniature OES in the quantitative analysis of mercury (Hg). With the use of a piezoelectric transformer, microplasma devices can be constructed without the need for an extra high voltage power supply. The PTM-OES system features low power consumption, small size, light weight, sturdiness, and high safety, making it beneficial for on-site environmental monitoring.
MICROCHEMICAL JOURNAL
(2023)
Article
Chemistry, Physical
Wei Liu, Cheng Zhang, Riccardo Alessandri, Benjamin T. Diroll, Yang Li, Heyi Liang, Xiaochun Fan, Kai Wang, Himchan Cho, Youdi Liu, Yahao Dai, Qi Su, Nan Li, Songsong Li, Shinya Wai, Qiang Li, Shiyang Shao, Lixiang Wang, Jie Xu, Xiaohong Zhang, Dmitri V. Talapin, Juan J. de Pablo, Sihong Wang
Summary: We have synthesized stretchable electroluminescent polymers that can achieve near-unity theoretical quantum yield through thermally activated delayed fluorescence. Our polymers display 125% stretchability and 10% external quantum efficiency, and demonstrate a fully stretchable organic light-emitting diode. Stretchable light-emitting materials are crucial for the development of skin-like displays and optical biostimulation applications.
Article
Mathematics, Applied
Vladimir V. Semenov, Xavier Porte, Ibrahim Abdulhalim, Laurent Larger, Daniel Brunner
Summary: Nonlinear spatiotemporal systems are the basis for numerous physical phenomena in various fields, and the normal form description provides a canonical approach to unify models from different domains. Continuous transition between different types of dynamical systems by tuning accessible system parameters is highly relevant and can be achieved using an experimental platform.
Article
Astronomy & Astrophysics
K. Sasikumar Raja, Milan Maksimovic, Eduard P. Kontar, Xavier Bonnin, Philippe Zarka, Laurent Lamy, Hamish Reid, Nicole Vilmer, Alain Lecacheux, Vratislav Krupar, Baptiste Cecconi, Lahmiti Nora, Laurent Denis
Summary: This study presents a statistical analysis of the spectral response of solar radio type III bursts over a wide frequency range, revealing a clear peak in the median radio flux density around 2 MHz. The study extends the analysis to metric radio frequencies and confirms the maximum spectral response at 2 MHz. A simple empirical model is used to describe the median radio flux, and the maximum radio power is found to fall within a specific range depending on the assumption of fundamental or harmonic emissions.
ASTROPHYSICAL JOURNAL
(2022)
Article
Multidisciplinary Sciences
Pravinraj Selvaraj, Sheng-Le Wang, Tsung-Yi Hou, Cheng-Kai Liu, Ko-Ting Cheng
Summary: This study demonstrates the use of reflective phase-only spatial light modulator (RLC-SLM) to achieve white light focusing and color separation with high diffraction efficiency in the visible range. These recent advances open up new possibilities for adaptive camera systems, microscopes, holograms, and portable and wearable devices.
SCIENTIFIC REPORTS
(2023)
Article
Physics, Fluids & Plasmas
David Steuer, Henrik van Impel, Andrew R. Gibson, Volker Schulz-von der Gathen, Marc Boeke, Judith Golda
Summary: A new actinometry method, helium state enhanced actinometry (SEA), is proposed in this study. By measuring the emission of specific atomic states at certain wavelengths, SEA allows for the simultaneous determination of atomic oxygen density and mean electron energy. Compared to traditional actinometry methods and energy resolved actinometry (ERA), SEA offers a simplified experimental procedure and improved precision in electron energy measurement.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Ruijing Fu, Wenya Zhao, Lingrui Wang, Zhiwei Ma, Guanjun Xiao, Bo Zou
Summary: By high-pressure processing, emission enhancement and non-doping control of color temperature can be achieved in two-dimensional perovskite nanocrystals.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Applied
Krzysztof Greda, Pawel Pohl
Summary: A new method of optical emission spectrometry (OES) using micmplasma source was developed for the determination of Na, K, Mg, Ca, and Zn in wine, without the need for acid digestion. The study also found that red wines have higher levels of K and Mg, and different grape varieties can be distinguished based on the concentrations of K and Ca.
Article
Physics, Applied
Shuqun Wu, Xuhui Liu, Fan Ouyang, Yunxiang Luo, Yue Guo, Chaohai Zhang
Summary: This study investigates the effects of different voltage waveforms on the uniformity of the microplasma array for modifying the hydrophilicity of PDMS microchannels. The microplasma array excited by AC voltage appears more uniform and has higher gas temperature and electron density. The ignition of microplasma inside each microchannel shows strong randomness in spatial distribution, with nearly equal opportunities for each microchannel to be ignited.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Environmental Sciences
Jinwen Xu, Yi Qiang
Summary: This study utilized nighttime lights (NTL) remote sensing images to analyze community recovery and resilience during Hurricane Sandy, revealing potential factors of NTL changes and urban-rural disparities in disaster impacts and recovery. The findings provide new insights into improving disaster awareness and preparation of local communities.
Article
Physics, Applied
I Korolov, D. Steuer, L. Bischoff, G. Huebner, Y. Liu, V Schulz-von der Gathen, M. Boeke, T. Mussenbrock, J. Schulze
Summary: Absolute atomic oxygen densities were measured in a microplasma reference jet operated in He/O-2 and driven by tailored voltage waveforms. The results show that the density of atomic oxygen can be controlled and optimized by voltage waveform tailoring, and the shape of the measured density profiles can be controlled as well. The generation of atomic oxygen can be further optimized by changing the reactive gas admixture and tuning the peak-to-peak voltage amplitude.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Simon Kreuznacht, Marc Boeke, Volker von der Gathen
Summary: This study investigates a microplasma channel, revealing different discharge behaviors and ignition characteristics compared to microplasma arrays. The discharge expands in both height and width above the upper edge of the powered electrodes, exhibiting self-pulsing and wavelike ignition. The insights gained from this study will help understand the discharge behavior in microplasma arrays.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Yue Liu, Ihor Korolov, Jan Trieschmann, David Steuer, Volker von der Gathen, Marc Boke, Lena Bischoff, Gerrit Hubner, Julian Schulze, Thomas Mussenbrock
Summary: The study investigates the excitation of atmospheric pressure helium plasma jets with oxygen admixture using a hybrid simulation code to control the electron energy probability function through tailored voltage waveforms, enhancing the generation of reactive neutral species.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
Alexandra Brisset, Andrew R. Gibson, Sandra Schroeter, Kari Niemi, Jean-Paul Booth, Timo Gans, Deborah O'Connell, Erik Wagenaars
Summary: This study investigates the impact of adding oxygen and water vapor to helium plasma on the density of OH, revealing that the addition of O-2 leads to a significant increase in atomic oxygen density. The simulations show that OH, O, and O-3 densities can be controlled relatively independently over a wide range of conditions through the addition of multiple gas admixtures.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Editorial Material
Physics, Fluids & Plasmas
Sadruddin Benkadda, Satoshi Hamaguchi, Magali Muraglia, Deborah O'Connell
PHYSICS OF PLASMAS
(2021)
Article
Physics, Applied
David Steuer, Ihor Korolov, Sascha Chur, Julian Schulze, Volker Schulz-von der Gathen, Judith Golda, Marc Boeke
Summary: The study measured two-dimensional spatially resolved absolute atomic oxygen densities within an atmospheric pressure micro plasma jet and in its effluent. It was found that both the species formation behavior and the maximum distance between the jet nozzle and substrates for possible oxygen treatments of surfaces can be controlled by adjusting the gas flow.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Physics, Fluids & Plasmas
Youfan He, Patrick Preissing, David Steuer, Maximilian Klich, Volker Schulz-von der Gathen, Marc Boeke, Ihor Korolov, Julian Schulze, Vasco Guerra, Ralf Peter Brinkmann, Efe Kemaneci
Summary: A zero-dimensional and a pseudo-one-dimensional plug-flow model were developed to investigate atmospheric-pressure plasma jets operated with different gas mixtures, and the models were validated through comparisons with simulation results and literature data.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Applied
G. Huebner, L. Bischoff, I Korolov, Z. Donko, M. Leimkuehler, Y. Liu, M. Boeke, V Schulz-von der Gathen, T. Mussenbrock, J. Schulze
Summary: This study investigated the effects of changing the driving frequencies on the electron power absorption dynamics, generation of helium metastables, and dissociation of nitrogen molecules in He/N-2 plasmas using experiments and simulations. The results showed that increasing the fundamental frequency can significantly enhance the plasma and metastable densities. Furthermore, the voltage waveform tailoring (VWT) operation yielded higher densities of helium metastables and electrons, as well as a higher dissociation rate of N-2, compared to the single-frequency operation mode.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Philipp A. Maass, Volker Schulz-von der Gathen, Achim von Keudell, Julian Held
Summary: Spokes are patterns of increased light emission observed in magnetron sputtering discharges, moving through the plasma at high velocities and presenting challenges for measurements. Optical emission spectroscopy of spokes in both high power impulse magnetron sputtering and direct current magnetron sputtering discharges reveals the dynamics of electrons drifting through spokes.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Sebastian Dzikowski, David Steuer, Sylvain Iseni, Judith Golda, Marc Boeke, Volker Schulz-von der Gathen
Summary: The electric field is a crucial parameter in plasma research, but experimental data on electric field strengths in micro-structured surface discharges are scarce. By utilizing the Stark effect of permitted and forbidden helium spectral lines, spatially-integrated and time-resolved electric field strengths can be obtained within a certain range, and can be controlled by the bipolarity of the applied voltage.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
Jonathan Tennyson, Sebastian Mohr, M. Hanicinec, Anna Dzarasova, Carrick Smith, Sarah Waddington, Bingqing Liu, Luis L. Alves, Klaus Bartschat, Annemie Bogaerts, Sebastian U. Engelmann, Timo Gans, Andrew R. Gibson, Satoshi Hamaguchi, Kathryn R. Hamilton, Christian Hill, Deborah O'Connell, Shahid Rauf, Kevin van 't Veer, Oleg Zatsarinny
Summary: The Quantemol database is a valuable resource for plasma models, providing cross sections and rates of important processes. It includes data on heavy particle collisions, electron collision processes, and surface processes. Users can access the data through a web interface or application program interface and use it in popular plasma modeling codes.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
David Steuer, Henrik van Impel, Andrew R. Gibson, Volker Schulz-von der Gathen, Marc Boeke, Judith Golda
Summary: A new actinometry method, helium state enhanced actinometry (SEA), is proposed in this study. By measuring the emission of specific atomic states at certain wavelengths, SEA allows for the simultaneous determination of atomic oxygen density and mean electron energy. Compared to traditional actinometry methods and energy resolved actinometry (ERA), SEA offers a simplified experimental procedure and improved precision in electron energy measurement.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2022)
Article
Physics, Fluids & Plasmas
J. Held, V Schulz-von der Gathen, A. von Keudell
Summary: The ionization of sputtered species in high power impulse magnetron sputtering of titanium, chromium, and aluminum targets is analyzed using spectroscopic imaging. The study finds that titanium particles become ionized closer to the target compared to aluminum or chromium particles. This is because titanium has a higher electron temperature. A global model derived from the ionization region model shows good agreement with probe measurements when adjusting the transport physics.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
David Steuer, Henrik van Impel, Volker Schulz-von der Gathen, Marc Boeke, Judith Golda
Summary: Micro cavity plasma arrays have various applications, including treatment of volatile organic compounds and generation of new species. The focus has shifted to plasma catalysis, where catalytic surfaces are combined with plasmas. The key is generating reactive species like atomic oxygen within the plasma, typically measured using laser spectroscopic methods. In the case of micro plasma arrays, limited optical access led to the use of optical emission spectroscopy and helium state enhanced actinometry.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
Article
Physics, Fluids & Plasmas
S. Thiemann-Monje, J. Held, S. Schuettler, A. von Keudell, V Schulz-von der Gathen
Summary: In magnetron sputtering discharges, ions and neutral particles exhibit high velocities in the azimuthal direction. The ion velocities increase with target distance. Experimental results are in good agreement with simulations, indicating that the momentum transfer from electrons to ions via Coulomb collisions is the main source of azimuthal acceleration.
PLASMA SOURCES SCIENCE & TECHNOLOGY
(2023)
