Article
Engineering, Aerospace
Yueh-Heng Li, Yi-Chien Chen, Sheng-Wen Liu, Alim Ruestem Aslan
Summary: Ion thrusters are widely used in the space industry due to their high efficiency, high specific impulse, and long lifetime. The thrust performance of a radio-frequency (RF) ion thruster depends not only on the RF power but also on other critical parameters such as propellant flow rate, ion grids voltages, and RF input power. A surrogate model, the Kriging model, is used to simplify the estimation and optimization of thrust performance. Based on Kriging model simulations, the designed RF ion thruster can achieve a thrust of 1.9 mN, a specific impulse of 1649.5 s, and a thrust efficiency of 48% under specific operating conditions.
Article
Engineering, Electrical & Electronic
Stephen Henthorn, Timothy O'Farrell, Mohammad Reza Anbiyaei, Kenneth Lee Ford
Summary: Direct RF sampling receivers are explored for concurrent multiband reception in mobile broadband applications. The research examines the use of direct RF digitization to enable tunable and concurrent reception of multiple bands with a single RF front-end. Mathematical models of Nyquist and subband sampling receivers are presented, and a quadband LTE receiver is simulated and implemented in a hardware-in-the-loop testbed. The desensitization of receivers due to multiband processing is evaluated, showing a maximum of 3dB degradation within LTE standard requirements for adjacent band interference.
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS
(2023)
Article
Medicine, General & Internal
Adone Baroni, Pasquale Verolino
Summary: Scars are a common consequence of various events, and their treatment often has limited effectiveness and side effects. Plasma radiofrequency ablation is a new technique that may offer a more effective and safer treatment option for scars.
JOURNAL OF CLINICAL MEDICINE
(2022)
Article
Chemistry, Physical
Pengtao Yang, Kai Sun, Yan Wu, Haikun Wu, Xuechun Yang, Xinfeng Wu, Hailiang Du, Runhua Fan
Summary: In this study, percolative bismuth ferrite/silver composites with different contents of Ag were fabricated, and Lorentz-like and Drude-like negative permittivity behaviors were observed. Further investigation revealed the effects of dielectric resonance and plasma oscillation on the negative permittivity behaviors, and the synergistic effect of dipole resonance and free electrons on the transition of these behaviors.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Pengtao Yang, Kai Sun, Yan Wu, Haikun Wu, Xuechun Yang, Xinfeng Wu, Hailiang Du, Runhua Fan
Summary: Two different negative permittivity behaviors, Lorentz-like and Drude-like, were observed in bismuth ferrite/silver composites with different contents of Ag. The reasons for these behaviors were identified as dielectric resonance and plasma oscillation, respectively.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Qi Cai, Jun Xie, Kai Xu, Guanglei Wang, Jianjun Han, Hong Jiang, Song Zhang
Summary: The study focused on the volatilization and size distribution of ISG spherical particles prepared by Ar-H-2 radio-frequency plasma. Results showed that high spheroidization rate and lower volatilization of B2O3 and Na2O were achieved under low flow rate of carry gas and low feed rate. EPMA analysis revealed a nearly homogeneous distribution of elements on particle surfaces, providing potential for future research.
CERAMICS INTERNATIONAL
(2021)
Article
Environmental Sciences
Jesus M. Paniagua-Sanchez, Francisco J. Garcia-Cobos, Montana Rufo-Perez, Antonio Jimenez-Barco
Summary: This study tested a rapid outdoor sampling technique to measure human exposure to radio frequencies in a city. Measurements were taken with a personal exposure meter inside a moving vehicle. The results showed that the vehicle altered the readings but it was still possible to assess radio frequency exposure using this method. The technique is scalable to different sized cities and allows measurement at different times to analyze temporal variation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Physics, Fluids & Plasmas
Yu. V. Kovtun, H. Kasahara, V. E. Moiseenko, S. Kamio, T. Seki, K. Saito, R. Seki, A. Dinklage, D. Hartmann, H. Laqua, T. Stange, S. Lazerson, A. Alonso, T. Wauters, Ye. Kazakov, J. Ongena, I. E. Garkusha
Summary: The study aims to further develop an ICRF method of plasma production based on minority heating in stellarators. By introducing a programmable ICRF power ramp up, higher ICRF heating power experiments become possible. The increase in ICRF power leads to predictable increase in the density of the produced plasma.
Article
Chemistry, Physical
Vipula Sethi, Chetna Verma, Samrat Mukhopadhyay, Amlan Gupta, Bhuvanesh Gupta
Summary: Functional designing of polypropylene (PP) is essential for biomedical applications. Plasma treatment was done on PP hernia mesh to study the changes in its surface chemistry. The peroxide content increased with plasma treatment time up to 120 s, beyond which it decreased. The contact angle of the mesh decreased from 132 degrees to 32 degrees at an exposure time of 120 s and then increased to 78 degrees at 200 s. Surface characterization was done using AFM, FE-SEM, and ATR-FTIR. XPS was used to analyze the polar functionality on the PP mesh surface. Optimum plasma treatment conditions for PP mesh functionalization were investigated.
SURFACES AND INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Daye Ding, Ruozhou Li, Jing Yan, Jiang Liu, Yuming Fang, Ying Yu
Summary: In this study, the influence of microcracks on the RF characteristics of flexible microstrip was investigated by stretching the microstrip and proposing an equivalent circuit model to reveal the mechanisms. The morphology of the microcracks was characterized by SEM and the DC resistance was monitored. The changes in equivalent circuit element parameters (R, L, C) were found to be due to the change in conductive pathways, affecting the transmission and reflection of RF signals.
APPLIED SCIENCES-BASEL
(2021)
Article
Physics, Multidisciplinary
J. M. Long, Jing Ou, Yueheng Huang
Summary: This study investigates a carbon dust particle in a collisionless thermal plasma under the assumption of a drifting Maxwellian distribution with a time varying velocity caused by an oscillatory radio-frequency (RF) field. The research finds that the dust particle potential decreases while its fluctuation increases with increasing RF field strength or decreasing frequency, even when considering the thermionic current. By increasing the thermionic current through changes to the dust particle surface temperature, the resulting dust particle potential can change from negative to positive, and the fluctuation of the potential increases and then decreases. Additionally, the presence of the RF field can shorten the dust particle lifetime or reduce its survivability in RF plasma compared to its absence, due to the increase in total energy flux to the dust particle.
Article
Engineering, Mechanical
Benjamin Estacio, Gil Shohet, Sean A. Q. Young, Isaac Matthews, Nicolas Lee, Sigrid Close
Summary: The study examines the impact of background gas pressure on the plume evolution of hypervelocity impact experiments, highlighting the potential threat of electrostatic dust on spacecraft electronics due to increased risk of RF interference and electrical discharges.
INTERNATIONAL JOURNAL OF IMPACT ENGINEERING
(2021)
Article
Chemistry, Physical
Junlun Xiang, Guoyun Zhou, Yan Hong, Wei He, Shouxu Wang, Yuanming Chen, Chong Wang, Yao Tang, Yukai Sun, Yongkang Zhu
Summary: In this paper, a facile method of fully additive process to manufacture copper lines on flexible polyimide (PI) substrates was developed. The obtained solid copper deposition demonstrates highly reliable features. The compatibility of the developed additive method with the flexible PI substrate was confirmed.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Liron Issman, Philipp A. Kloza, Jeronimo Terrones Portas, Brian Collins, Afshin Pendashteh, Martin Pick, Juan J. Vilatela, James A. Elliott, Adam Boies
Summary: Carbon nanotube bundles were aligned using an altered direct spinning method and an AC electric field, resulting in enhanced electrical and tensile properties in the resulting textiles.
Article
Chemistry, Multidisciplinary
Qianhan Han, Ying Guo, Yarong Zhang, Jing Zhang, Jianjun Shi
Summary: In this experimental study, a plasma plume generated by radio frequency atmospheric pressure glow discharge was enhanced in terms of length and intensity by pulsed discharge. The enhanced plume was used to improve the O/C ratio of carbon fiber.
APPLIED SCIENCES-BASEL
(2022)
Article
Physics, Applied
Maria Mitronika, Jacopo Profili, Antoine Goullet, Nicolas Gautier, Nicolas Stephant, Luc Stafford, Agnes Granier, Mireille Richard-Plouet
Summary: TiO2 nanoparticles were injected into a low-pressure O2 plasma reactor to create a TiO2-SiO2 nanocomposite thin film, with the nanoparticles distributed uniformly in the matrix. Various techniques were used to estimate the fraction of TiO2 NPs inside the SiO2 matrix, with coherent values obtained between 12% and 19%. Control of the injection sequence allows tuning of the percentage of TiO2 NPs and the effective refractive index of the nanocomposites.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Anastasiya Sergievskaya, Amy O'Reilly, Adrien Chauvin, Jozef Vesely, Adriano Panepinto, Julien De Winter, David Cornil, Jerome Cornil, Stephanos Konstantinidis
Summary: Magnetron sputter deposition on low vapor pressure liquids is an effective method for producing metal nanoparticles. In this study, silver nanoparticles were successfully produced by sputtering a silver target onto castor oil using a state-of-the-art HiPIMS technology. The parameters affecting the properties of the nanoparticles were investigated, and the stability of the initial silver nanoparticles formed in castor oil was discussed based on plasma-liquid surface interaction and quantum chemistry data.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Materials Science, Coatings & Films
P. Moskovkin, C. Maszl, R. Schierholz, W. Breilmann, J. Petersen, A. Pflug, J. Muller, M. Raza, S. Konstantinidis, A. von Keudell, S. Lucas
Summary: The study focuses on correlating basic plasma properties with morphological, structural and mechanical properties of thin films deposited by high power impulse magnetron sputtering. By studying the deposition and growth of titanium films at various discharge power densities, a transition from thermally-driven to ballistically-driven Ti atom mobility was revealed. Changes in micro-crystal orientation and nano hardness of the films were observed as discharge power density increased, alongside non-monotonic variations in surface roughness behavior.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Coatings & Films
Benjamin Dey, Simon Bulou, William Ravisy, Nicolas Gautier, Mireille Richard-Plouet, Agnes Granier, Patrick Choquet
Summary: This article presents an innovative sequential deposition method that enables the deposition of self-cleaning TiO2 coatings on thermolabile substrates at low temperatures using chemical vapor deposition. It opens a new way for the application of photocatalytic coatings on heat-sensitive substrates.
SURFACE & COATINGS TECHNOLOGY
(2022)
Review
Nanoscience & Nanotechnology
Anastasiya Sergievskaya, Adrien Chauvin, Stephanos Konstantinidis
Summary: Sputter deposition onto liquid substrates is a technique used to produce small, monodisperse, and ultrapure nanoparticles in colloidal dispersions. This review article provides a critical analysis of 132 papers published from 1996 to September 2021, focusing on the influence of sputtering parameters and host liquid properties on nanoparticle formation, as well as the properties and applications of the produced nanoparticles.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2022)
Article
Physics, Applied
Kamakshi Patel, Anastasiya Sergievskaya, Samir Chauhan, Stephanos Konstantinidis
Summary: The heating of liquid substrate by low-pressure sputtering plasma was investigated and the temperature increase was measured. The effect of sputtering conditions on liquid temperature was studied and the data were compared with numerical calculations and COMSOL simulation. The provided information is important for understanding the formation of nanoparticles during sputtering onto liquids.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Physics, Applied
K. Leonova, N. Britun, S. Konstantinidis
Summary: This study compares the discharge effects of hot magnetron sputtering (HMS) and cold magnetron sputtering (CMS), focusing on the current-voltage trends, behaviour of spectral lines, target temperature, and deposition rate. The results show that hot magnetron sputtering has a higher deposition rate at an appropriate power density.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Chemistry, Physical
Issraa Shahine, Jean-Yves Mevellec, Mireille Richard-Plouet, Bernard Humbert, Pierre-Yves Tessier
Summary: This article introduces a SERS substrate consisting of stacked ultrathin nanoporous gold layers, which can be used to detect very low concentrations of molecules in liquids or gases, and achieves a reproducible and robust SERS response at extremely low detection limits. The study also reveals the role of gold ligaments inside nanoporous layers, resulting in an increase in the size of the active SERS area.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Anastasiya Sergievskaya, Remi Absil, Adrien Chauvin, Kirill V. Yusenko, Jozef Vesely, Thomas Godfroid, Stephanos Konstantinidis
Summary: This paper investigates the effect of solvent viscosity on the formation of gold nanoparticles during the sputtering onto liquid process. It was found that well-dispersed Au NPs grow in low viscosity liquids, while a gold film forms on the surface of high viscosity liquids.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Adrien Chauvin, Walter Puglisi, Damien Thiry, Cristina Satriano, Rony Snyders, Carla Bittencourt
Summary: In this study, a novel two-step approach combining deposition and dealloying was used to design and fabricate efficient SERS platforms using a silver-aluminum thin film. The resulting nanoporous columnar structure, finely optimized through tuning deposition and dealloying parameters, exhibited excellent SERS properties with a detection limit down to 10-10 mol center dot L-1 for a solution of rhodamine B.
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Nathan Vinx, David Tromont, Adrien Chauvin, Philippe Leclere, Rony Snyders, Damien Thiry
Summary: In this work, a strategy for fabricating nanostructured organic thin films using the wrinkling phenomenon in a bilayer system has been established. The wrinkled surfaces showed great stability over time and can be used as templates for the deposition of an additional layer, resulting in the formation of a nanostructured organic-based surface.
Article
Materials Science, Coatings & Films
Adrien Chauvin, Gregory Savorianakis, Lukas Horak, Milan Dopita, Michel Voue, Stephanos Konstantinidis, Francois Reniers, Rony Snyders
Summary: A study on the synthesis of Al2O3-Ag cermet by reactive co-sputtering of Ag and aluminum in Ar/O2 gas mixtures is reported. The influence of important experimental parameters on the chemistry, morphology, and optical properties of the cermet coating is studied, and the photothermal property of the cermet is evaluated by measuring the surface elevation temperature under 1 sun irradiation. The data reveals that an absorbance of 0.92 and a surface temperature elevation up to 9.1 K can be reached after 30 min of illumination by optimizing the features of the cermet.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Adrien Chauvin, Anastasiya Sergievskaya, Anna Fucikova, Cinthia Antunes Correa, Jozef Vesely, Jerome Cornil, David Cornil, Milan Dopita, Stephanos Konstantinidis
Summary: This study reports on the growth of metal and metal-oxide based nanoparticles in heated polyol solutions, with the size modulation achieved through annealing and resulting in phenomena like reduction of copper oxide into copper and formation of carbon dots after annealing at 200 degrees C.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Laetitia Bardet, Herve Roussel, Stefano Saroglia, Masoud Akbari, David Munoz-Rojas, Carmen Jimenez, Aurore Denneulin, Daniel Bellet
Summary: The thermal instability of silver nanowires leads to increased electrical resistance in AgNW networks. Understanding the relationship between structural and electrical properties of AgNW networks is crucial for their integration as transparent electrodes in flexible optoelectronics. In situ X-ray diffraction measurements were used to study the crystallographic evolution of Ag-specific Bragg peaks during thermal ramping, revealing differences in thermal and structural transitions between bare and SnO2-coated AgNW networks.
Article
Chemistry, Multidisciplinary
Nathalia Cancino-Fuentes, Arnau Manasanch, Joana Covelo, Alex Suarez-Perez, Enrique Fernandez, Stratis Matsoukis, Christoph Guger, Xavi Illa, Anton Guimera-Brunet, Maria V. Sanchez-Vives
Summary: This study provides a comprehensive characterization of graphene-based solution-gated field-effect transistors (gSGFETs) for brain recordings, highlighting their potential clinical applications.
Article
Chemistry, Multidisciplinary
Sikandar Aftab, Hailiang Liu, Dhanasekaran Vikraman, Sajjad Hussain, Jungwon Kang, Abdullah A. Al-Kahtani
Summary: This study examines the effects of hybrid nanoparticles made of NiO@rGO and NiO@CNT on the active layers of polymer solar cells and X-ray photodetectors. The findings show that these hybrid nanoparticles can enhance the charge carrier capacities and exciton dissociation properties of the active layers. Among the tested configurations, the NiO@CNT device demonstrates superior performance in converting sunlight into electricity, and achieves the best sensitivity for X-ray detection.
Article
Chemistry, Multidisciplinary
Hyo Jung Shin, Seung Gyu Choi, Fengrui Qu, Min-Hee Yi, Choong-Hyun Lee, Sang Ryong Kim, Hyeong-Geug Kim, Jaewon Beom, Yoonyoung Yi, Do Kyung Kim, Eun-Hye Joe, Hee-Jung Song, Yonghyun Kim, Dong Woon Kim
Summary: This study investigates the role of SOX9 in reactive astrocytes following ischemic brain damage using a PLGA nanoparticle plasmid delivery system. The results demonstrate that PLGA nanoparticles can reduce ischemia-induced neurological deficits and infarct volume, providing a potential opportunity for stroke treatment.
Article
Chemistry, Multidisciplinary
Anurag Chaudhury, Koushik Debnath, Nikhil R. Jana, Jaydeep K. Basu
Summary: The study investigates the interaction between nanoparticles and cell membranes, and identifies key parameters, including charge, crowding, and membrane fluidity, that determine the adsorbed concentration and unbinding transition of nanoparticles.
Article
Chemistry, Multidisciplinary
Sina Sadeghi, Fazel Bateni, Taekhoon Kim, Dae Yong Son, Jeffrey A. Bennett, Negin Orouji, Venkat S. Punati, Christine Stark, Teagan D. Cerra, Rami Awad, Fernando Delgado-Licona, Jinge Xu, Nikolai Mukhin, Hannah Dickerson, Kristofer G. Reyes, Milad Abolhasani
Summary: In this study, an autonomous approach for the development of lead-free metal halide perovskite nanocrystals is presented, which integrates a modular microfluidic platform with machine learning-assisted synthesis modeling. This approach enables rapid and optimized synthesis of copper-based lead-free nanocrystals.
Article
Chemistry, Multidisciplinary
Zahir Abbas, Nissar Hussain, Surender Kumar, Shaikh M. Mobin
Summary: The rational construction of free-standing and flexible electrodes for electrochemical energy storage devices is an emerging research focus. In this study, a redox-active metal-organic framework (MOF) was prepared on carbon nanofibers using an in situ approach, resulting in a flexible electrode with high redox-active behavior and unique properties such as high flexibility and lightweight. The prepared electrode showed excellent cyclic retention and rate capability in supercapacitor applications. Additionally, it could be used as a freestanding electrode in flexible devices at different bending angles.
Article
Chemistry, Multidisciplinary
Lishan Zhang, Xiaoting Zhang, Hui Ran, Ze Chen, Yicheng Ye, Jiamiao Jiang, Ziwei Hu, Miral Azechi, Fei Peng, Hao Tian, Zhili Xu, Yingfeng Tu
Summary: Photodynamic therapy (PDT) is a promising local treatment modality in cancer therapy, but its therapeutic efficacy is restricted by ineffective delivery of photosensitizers and tumor hypoxia. In this study, a phototactic Chlorella-based near-infrared (NIR) driven green affording-oxygen microrobot system was developed for enhanced PDT. The system exhibited desirable phototaxis and continuous oxygen generation, leading to the inhibition of tumor growth in mice. This study demonstrates the potential of using a light-driven green affording-oxygen microrobot to enhance photodynamic therapy.
Article
Chemistry, Multidisciplinary
Yujin Li, Jing Xu, Xinqi Luo, Futing Wang, Zhong Dong, Ke-Jing Huang, Chengjie Hu, Mengyi Hou, Ren Cai
Summary: In this study, hollow heterostructured materials were constructed using an innovative template-engaged method as cathodes for zinc-ion batteries. The materials exhibited fast Zn2+ transport channels, improved electrical conductivity, and controlled volume expansion during cycling. The designed structure allowed for an admirable reversible capacity and high coulombic efficiency.
Article
Chemistry, Multidisciplinary
Paritosh Mahato, Shashi Shekhar, Rahul Yadav, Saptarshi Mukherjee
Summary: This study comprehensively elucidates the role of the core and electrostatic surface of metal nanoclusters in catalytic reduction reactions. The electrostatic surface dramatically modulates the reactivity of metal nanoclusters.
Article
Chemistry, Multidisciplinary
Pei Liu, Mengdi Liang, Zhengwei Liu, Haiyu Long, Han Cheng, Jiahe Su, Zhongbiao Tan, Xuewen He, Min Sun, Xiangqian Li, Shuai He
Summary: This study demonstrates a simple and environmentally-friendly method for the synthesis of zinc oxide nanozymes (ZnO NZs) using wasted hop extract (WHE). The WHE-ZnO NZs exhibit exceptional peroxidase-like activity and serve as effective catalysts for the oxidation of 3,3,5,5-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In addition, a straightforward colorimetric technique for detecting both H2O2 and glucose was developed using the WHE-ZnO NZs as peroxidase-like catalysts.
Article
Chemistry, Multidisciplinary
Hyunkyu Oh, Young Jun Lee, Eun Ji Kim, Jinseok Park, Hee-Eun Kim, Hyunsoo Lee, Hyunjoo Lee, Bumjoon J. Kim
Summary: Mesoporous carbon particles have unique structural properties that make them suitable as support materials for catalytic applications. This study investigates the impact of channel nanostructures on the catalytic activity of porous carbon particles (PCPs) by fabricating PCPs with controlled channel exposure on the carbon surface. The results show that PCPs with highly open channel nanostructures exhibit significantly higher catalytic activity compared to those with closed channel nanostructures.
Article
Chemistry, Multidisciplinary
Yunjie Lu, Zhaohui Li, Zewei Li, Shihao Zhou, Ning Zhang, Jianming Zhang, Lu Zong
Summary: A tough, long-lasting adhesive and highly conductive nanocomposite hydrogel (PACPH) was fabricated via the synergy of interfacial entanglement and adhesion group densification. PACPH possesses excellent mechanical properties, interfacial adhesion strength, and conductivity, making it a promising material for long-term monitoring of human activities and electrocardiogram signals.
Article
Chemistry, Multidisciplinary
Zichao Wei, Audrey Vandergriff, Chung-Hao Liu, Maham Liaqat, Mu-Ping Nieh, Yu Lei, Jie He
Summary: We have developed a simple method to prepare polymer-grafted plasmonic metal nanoparticles with pH-responsive surface-enhanced Raman scattering. By using pH-responsive polymers as ligands, the aggregation of nanoparticles can be controlled, leading to enhanced SERS. The pH-responsive polymer-grafted nanoparticles show high reproducibility and sensitivity in solution, providing a novel approach for SERS without the need for sample pre-concentration.
Article
Chemistry, Multidisciplinary
Melis Ozge Alas Colak, Ahmet Gungor, Merve Buldu Akturk, Emre Erdem, Rukan Genc
Summary: This research investigates the effect of functionalizing carbon dots with hydroxyl polymers on their performance as electrode materials in a supercapacitor. The results show that the functionalized carbon dots exhibit excellent electrochemical performance and improved stability.