Article
Engineering, Chemical
Chun-Ning Mao, Akua Asa-Awuku, Christopher D. D. Zangmeister, Jamie L. L. Weaver, James G. G. Radney
Summary: The complex distribution of particle charge states caused by charge neutralization processes is a known issue in aerosol science. Here, we show that non-idealities in an impactor's collection efficiency can lead to the transmission of multiply charged particles, affecting optical measurements. By using cavity ring-down spectroscopy and particle counting, we quantified the extinction cross sections of ammonium sulfate particles and investigated the underlying reasons for the presence of multiply charged particles. The results highlight the importance of orthogonal spectroscopic methods in detecting multiply charged particles.
AEROSOL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Physical
Kun Wang, Samuel Leville, Behrouz Behdani, Carlos A. Silvera Batista
Summary: This study demonstrates the advantageous use of Faradaic processes under AC fields for long-range transport, focusing and assembly of charged colloids. By adjusting the voltage and frequency, the position and order of the levitating crystalline sheet can be easily controlled.
Article
Engineering, Chemical
Yi Liu, Chenye Pan, Lin Zhang, Hong Ding, Haogang Huang, Fang Xu, Shi Bu, Haiou Jin, Weigang Xu
Summary: This paper investigates the mechanism of particle coagulation and charging under the coupling of electric field and acoustic field. The optimal operating parameters for charged particle coagulation are obtained through numerical analysis and experimental studies. The results show that the higher the supply voltage and sound pressure level, the better the particle coagulation effect. The acoustic frequency is not linearly related to particle coagulation efficiency. The coupling of acoustic and electric fields leads to significant particle coagulation effect.
Article
Engineering, Chemical
Yuan Yao, Jesse Capecelatro
Summary: This study presents a numerical framework for accurately computing electrically charged particles in wall-bounded flows, removing the contribution from periodic images by agnostically solving the electric Poisson equation and strategically mapping particle charges to the grid, while enforcing appropriate boundary conditions using a signed-distance levelset function.
Article
Engineering, Environmental
Lei He, Haifeng Rong, Meng Li, Mengya Zhang, Sirui Liu, Meng Yang, Meiping Tong
Summary: Bacteria play a role in influencing the distribution and fate of plastics in the environment. Different types of bacteria have varied effects on the transport and deposition of microplastics, with the formation of bacteria-plastic clusters contributing to these changes in behavior.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Chemistry, Physical
Brandy Perkins-Howard, Ashley R. Walker, Quynh Do, Dodangodage Ishara Senadheera, Fawwaz Hazzazi, J. P. Grundhoefer, Theda Daniels-Race, Jayne C. Garno
Summary: The wettability of substrates greatly affects the surface assembly of monodisperse spherical particles in colloidal suspensions, and controlling the wettability can improve the quality of surface masks in manufacturing processes.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
Matyas Hunyadi, Csaba Buga, Lorant Csige, Attila Csik
Summary: Charged-particle induced radioluminescence of CsPbBr3 perovskite quantum dots in their clustered state was investigated using alpha-particles, with analysis suggesting the potential of perovskite nanomaterials in precise timing applications. Comparative measurements with conventional scintillators demonstrated advantages of perovskite QDs in terms of time-resolved waveforms and detection efficiency.
Article
Chemistry, Multidisciplinary
Manigandan Sabapathy, Khalid Zubair Md, Hemant Kumar, Sashikumar Ramamirtham, Ethayaraja Mani, Madivala G. Basavaraj
Summary: The study utilizes aggregation between oppositely charged particles to visualize and quantify the equilibrium position of charged colloidal particles at the fluid-water interface, highlighting the effect of size ratio on measurement accuracy. The selective deposition of nanoparticles enables the distinct visualization of the three-phase contact line, facilitating electron microscopy analysis and determination of equilibrium contact angle.
Article
Mechanics
Babu Bhaskar, Somnath Bhattacharyya
Summary: Diffusiophoresis, mediated by an imposed ionic concentration gradient, is a useful technique for directed migration of colloids. Theoretical studies on diffusiophoresis in a polymer hydrogel medium are limited due to the presence of nonlinear terms in the fluid transport equations. In this study, the finite ion size effects on diffusiophoresis of a charged particle in a hydrogel medium are considered, and the modified ion transport equations coupled with the Brinkman equation and the Poisson equation are numerically solved. The impacts of hindered diffusivity of ions and finite ion size effect on diffusiophoresis are analyzed, and a simplified expression for the mobility in a hydrogel medium is proposed.
Article
Engineering, Aerospace
Hoonkyu Seo, Yuchul Shin, Ju Woo, Woohyung Seol, Chaean Lee, Chanhaeng Lee, Hyunsang Lee, Jongho Seon, Jongdae Sohn, Kyoungwook Min, Kwangsun Ryu, Goohwan Shin, Jangsoo Chae, Craig S. Tindall, Davin E. Larson, John Sample
Summary: This paper discusses the development and early operation of a space-borne instrument capable of measuring and identifying charged particles and neutrals in the energy range of 20-400 keV. The instrument uses electric fields to deflect and distinguish particles, and has demonstrated successful performance capabilities through laboratory tests and numerical simulations.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Physics, Multidisciplinary
Arpita Srivastava, Brunno C. Rocha, Harish Vashisth
Summary: In this study, we conducted coarse-grained Langevin dynamics simulations to investigate the self-assembly behavior of homogeneous mixtures of lobed colloidal particles with opposite charges. Our results showed that different shaped particles formed distinct self-assembled structures, including chains, sheets, crystalline, and spherical structures. We also found that the self-assembled structures and porosities varied with temperature and charge conditions.
FRONTIERS IN PHYSICS
(2022)
Article
Chemistry, Physical
A. M. Abdel Reheem, A. Atta
Summary: The research modified the ion-source to produce differently charged particles, finding that the amount of neutral particles and electrons depends on the positive ion current, gas pressure, and gas type. Increasing gas pressure can increase the ratio of neutral particles to positive charge, reaching 1.2 in the case of argon and 1.45 in the case of nitrogen gas.
RADIATION PHYSICS AND CHEMISTRY
(2021)
Article
Biochemical Research Methods
Saurabh Kumar Maurya, Sankar Sarkar, Hemanta Kumar Mondal, Hiroyuki Ohshima, Partha P. Gopmandal
Summary: The study analytically investigated the electrophoresis of core-shell composite soft particles with a hydrophobic inner core grafted with a highly charged polyelectrolyte layer, showing the impact of the pH-dependent charge properties of the polyelectrolyte layer on the electrophoretic mobility. By solving the nonlinear Poisson-Boltzmann equation coupled with Stokes-Darcy-Brinkman equations, a simple expression was derived for the mobility of the soft particles under the Donnan limit, exceeding the electric double layer thickness. The results recovered existing findings and illustrated the influence of key parameters on the electrophoretic mobility.
Article
Thermodynamics
Jiawei Liu, Kuahai Yu, Danesh Tafti, Xi Yang, Hongyu Xu
Summary: This study investigates the collision, adhesion, and deposition of micron-sized dust particles in an internal cooling duct with pin fin arrays. The results show that the collision ratio of particles on the pins increases with the particle size, while the sticking ratio decreases. The particle temperature has minimal impact on the collision ratio and sticking ratio, but at higher temperatures, the collision ratio decreases and the sticking ratio increases. Increasing the streamwise pin spacing reduces the deposition of particles on the endwalls.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Nanoscience & Nanotechnology
Jo-Chi Yu, Mohammed K. Abdel-Rahman, D. Howard Fairbrother, Lisa McElwee-White
Summary: FEBID and FIBID are direct-write fabrication techniques using focused beams of charged particles. Ultra high vacuum surface science studies provide mechanistic information on electron and ion-induced processes, aiding in the design of custom precursors for these techniques. Minimizing contamination in nanostructures is crucial for many applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Ranxue Yu, Alessandro Senocrate, Francesco Bernasconi, Tina Kunniger, Luca Mueller, Robin Pauer, Corsin Battaglia, Xinhou Wang, Jing Wang
Summary: Novel conductive and porous membranes are designed by facile and scalable approach to fabricating conformally coated gold layers on electrospun PVDF fibers. These membranes exhibit high electrical conductivity, low sheet resistance, hydrophobicity, gas permeability, and excellent mechanical durability. They show practical suitability as gas diffusion electrodes for electrochemical CO2 reduction.
MATERIALS & DESIGN
(2023)
Article
Environmental Sciences
Xiaole Zhang, Xiaoxiao Feng, Jie Tian, Yong Zhang, Zhiyu Li, Qiyuan Wang, Junji Cao, Jing Wang
Summary: Millions of premature mortalities are caused by PM2.5 air pollution globally each year. To address this issue, the researchers updated the emission inventories and harmonized the results from source-oriented and receptor models, finding a significant reduction in pollutant emissions in Beijing and successfully identifying temporal changes during the Spring Festival.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Chemical
Zhengyuan Pan, Qisheng Ou, Francisco J. Romay, Weiqi Chen, Tianle You, Yun Liang, Jing Wang, David Y. H. Pui
Summary: The microstructure of filter media plays a crucial role in determining its macroscopic properties. This study investigated the dust loading process in structure-resolved filter media using microscale simulations. The results provide insights into the influence of structural factors on the dust holding capacity of the filter media and propose a strategy for designing innovative filters.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Environmental Sciences
Yongsheng Ling, Chengfeng Liu, Qing Shan, Daqian Hei, Xiaojun Zhang, Chao Shi, Wenbao Jia, Jing Wang
Summary: During severe nuclear accidents, radioactive materials are expected to be released into the atmosphere. A deep learning-based method that utilizes field environmental monitoring data was developed to estimate the source term, improving the estimation accuracy compared to traditional methods.
Article
Engineering, Chemical
Weidong He, Yang Yue, Yinghe Guo, Yi-Bo Zhao, Jingxian Liu, Jing Wang
Summary: Inert particles are commonly used as substitutes for biological particles in filtration tests. The physical properties of inert particles and biological particles may affect the filtration efficiencies of filter media. The study evaluated the filtration efficiencies of surgical masks and N95-rated respirators using inert particles (NaCl and PSL) and biological particles (E.coli, B.subtilis, BSA, and endotoxin). The results showed minimal difference in filtration efficiencies for inert particles and biological particles, except for surgical masks where the interception lengths affected the filtration efficiency.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Fuze Jiang, Bei Liu, Yang Yue, Yile Tao, Zhen Xiao, Meng Li, Zheng Ji, Jiukai Tang, Guangyu Qiu, Martin Spillmann, Junji Cao, Lianjun Zhang, Jing Wang
Summary: This study presents a highly specific bioanalysis platform with an extremely low limit of detection and good analytical accordance with RT-qPCR for accurate identification and quantitation of low doses of HCoV-229E and SARS-CoV-2 viruses in urban ambient air. The platform was tested using cultivated coronavirus to simulate the airborne spread of SARS-CoV-2, and it reliably detected airborne coronavirus and revealed transmission characteristics. Real-world HCoV-229E and SARS-CoV-2 concentrations in airborne particulate matters collected from different regions were quantitatively measured and verified by RT-qPCR.
Article
Materials Science, Multidisciplinary
Min Gao, Yi-Bo Zhao, Zhi-Jun Zhao, Guangyu Qiu, Yile Tao, Guochen Bao, Ying Du, Martin Spillmann, Jiukai Tang, Soonhyoung Hwang, Jun-Ho Jeong, Jing Wang
Summary: Multiplex sensing platforms are crucial for various applications such as intelligent diagnosis and environmental monitoring. The development of nanofabrication technologies has greatly improved the performance of these sensors in the past decades. However, there are still challenges in achieving cost-effective and large-scale fabrication processes. Nano-transfer printing and imprinting technology have shown potential in fabricating 100 nm structures efficiently.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Multidisciplinary Sciences
Aiwen Wang, Meng Du, Jiaxin Ni, Dongqing Liu, Yunhao Pan, Xiongying Liang, Dongmei Liu, Jun Ma, Jing Wang, Wei Wang
Summary: This study achieves synergistic activation of peroxymonosulfate (PMS) through S-scheme heterojunction regulated by photoexcitation. The enhanced reactive oxygen species generation and increased degradation rate of doxycycline are achieved. The 3D polymer chain spatial structure of chitosan hydrogel facilitates PMS capture and electron transport, reducing the use of transition metal activator and leaching of metal ions.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Nehad Ali Shah, Shahida Rehman, Dumitru Vieru, Se-Jin Yook
Summary: This study investigates the transient flows of micropolar fluids through circular domains. The flow domain consists of two annular regions, with the outer region being clean and the inner region containing a porous medium. Analytical solutions for the linear and angular velocities in both regions, obtained using Laplace transform and finite Hankel integral transform, are determined under the assumption of continuity of velocities, stresses, and couple stresses on the interface. The obtained solutions are novel and can provide solutions for specific cases of filtration processes involving fluids with similarities to micropolar fluids. Numerical simulations and graphical illustrations are used to investigate the effects of various parameters on the fluid motion.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
M. Dinesh Kumar, N. Ameer Ahammad, C. S. K. Raju, Se-Jin Yook, Nehad Ali Shah, Sayed M. Tag
Summary: The influence of boundary layer flow on porous wedge nanofluids, hybrid nanofluids, and ternary hybrid nanofluids is studied in the presence of a consistent transverse magnetic field and heat radiation. Different cases involving water as the base fluid and various combinations of nanofluids are considered. The approximate relationships between temperature, velocity, rate of heat transfer, and shear stress at the wedge are visualized for different parameter values. The study shows that ternary hybrid nanofluids have higher Nusselt number transfer rate and hybrid nanofluids have higher skin friction rate compared to nanofluids. The optimization conditions based on the key factors are found using the RSM method.
ALEXANDRIA ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Yi-Bo Zhao, Nathalie Hayeck, Najat A. Saliba, Claudia Schreiner, Markus Zennegg, Fuze Jiang, Renato Figi, Davide Bleiner, Jing Wang
Summary: The long-term effects of the 2020 Beirut port explosion on air quality and public health are inconclusive. This study collected PM10 samples in Beirut one month and three months after the explosion and compared the concentrations of various components with previous years. The results suggest that the explosion had minimal impact on post-explosion PM concentrations, but investigations on chemical contaminations in soil and water are urgently needed.
AEROSOL AND AIR QUALITY RESEARCH
(2023)
Article
Biochemical Research Methods
Xiaobao Cao, Tomas Buryska, Tianjin Yang, Jing Wang, Peter Fischer, Aaron Streets, Stavros Stavrakis, Andrew deMello
Summary: Droplet-based microfluidic systems have become popular in high throughput screening due to their flexibility, high-throughput capabilities, and efficient processing of small volumes. However, the challenges of performing customized operations on user-defined droplets have limited their use in complex screening applications. To address this, the integration of droplet- and valve-based microfluidic technologies provides a solution for controlling droplet manipulations while maintaining analytical throughput. This article presents a microfluidic platform that combines microvalve technology with droplet-based compartmentalization to achieve programmable fluid handling. The platform allows for the execution of user-defined reaction protocols within storage chambers by merging droplets containing specified reagents.
Proceedings Paper
Engineering, Electrical & Electronic
Hangxing Liu, Fuze Jiang, Dongwon Lee, Yuguo Sheng, Adam Wang, Marco Saif, Ying Kong, Zhikai Huang, Thomas Burger, Jing Wang, Hua Wang
Summary: This work presents a fully integrated CMOS electrochemical biosensor chip that detects localized and concurrent electrochemical signals. Each pixel has an individual potentiostat, a current sensor, and three on-chip electrodes, eliminating the need for external electrodes and addressing issues of pixel-to-pixel crosstalk. By using electropolymerization of a conductive polymer film and an intercalating redox compound, this platform achieves an electrode-immobilization-free sensing mechanism, enabling highly sensitive and rapid molecular diagnostic analysis.
IEEE 49TH EUROPEAN SOLID STATE CIRCUITS CONFERENCE, ESSCIRC 2023
(2023)
Review
Chemistry, Multidisciplinary
Guangyu Qiu, Xiaole Zhang, Andrew J. deMello, Maosheng Yao, Junji Cao, Jing Wang
Summary: Airborne pathogens pose a significant threat to public health, and on-site airborne pathogen detection can be an effective non-pharmaceutical intervention strategy. However, there are still challenges that need to be addressed.
CHEMICAL SOCIETY REVIEWS
(2023)
Article
Computer Science, Interdisciplinary Applications
Wenyu Jiang, Yuming Qiao, Guofeng Su, Xin Li, Qingxiang Meng, Hongying Wu, Wei Quan, Jing Wang, Fei Wang
Summary: This paper presents a novel hierarchical convolutional neural network (WFNet) for modeling wildfire spread patterns. By defining the spread spatiotemporal distribution field (SSDF) and implementing a hierarchical State-Condition mechanism, WFNet can efficiently encode high-order features of multimodal elements and exhibits competitive performance in computation time and model accuracy.
ENVIRONMENTAL MODELLING & SOFTWARE
(2023)
Article
Engineering, Chemical
Francisco J. Higuera, Juan Fernandez de la Mora
Summary: This study investigates a particle condensation device that uses cold and warm humid air streams to achieve water vapor condensation. Compared to existing water condensation particle counters, this configuration offers advantages such as variable saturation ratio, accelerated penetration of water vapor, and a relatively uniform saturation field.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Brijal Prajapati, Vishal Dharaiya, Manoranjan Sahu, Chandra Venkatraman, Pratim Biswas, Kajal Yadav, Delwin Pullokaran, Ramya Sunder Raman, Ruqia Bhat, Tanveer Ahmad Najar, Arshid Jehangir
Summary: This study evaluated the performance of a low-cost particulate matter sensor and proposed a physics-based calibration method. The results showed that the physics-based calibration approach performed better compared to statistical models at both observation sites.
JOURNAL OF AEROSOL SCIENCE
(2024)
Correction
Engineering, Chemical
N. Searle, K. Kaur, K. Kelly
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Tianyu Cen, Laura Torrent, Andrea Testino, Christian Ludwig
Summary: In this study, a hyphenated setup consisting of a rotating disk diluter (RDD) with spICP-MS (RDDspICP-MS) was used for online sampling and characterization of metallic nanoparticles (NPs) in ambient pressure aerosols. The RDD allowed for constant flow rate sampling of aerosols and adjusting the dilution ratio for different particle number concentrations (PNCs). The feasibility of this setup was tested with different sizes of AuNPs in argon-based and air-based aerosols, and the results showed a lower limit of detection for number concentration. The capability of the setup to accurately investigate multi-modal samples and the interference of ionic species was also demonstrated.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
A. Valenzuela, E. Bazo, R. A. Rica, L. Alados-Arboledas, F. J. Olmo-Reyes
Summary: This article introduces a method to measure the extinction cross section of levitated particles using an electrodynamic trap and double-cavity ring down spectroscopy technique, and demonstrates the potential of this method in 1,2,6-hexanetriol particles through simulations and experiments. Unlike traditional methods, this technique provides crucial information about the extinction cross section of sodium chloride particles during dehydration and hydration processes.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Shadi Yaqoubi, Mohaddese Sokuti, Sahand Mazloum-Ravasan, Kofi Asare-Addo, Hamed Hamishehkar, Ali Nokhodchi
Summary: In this study, a modified version of ultrasonic spray pyrolysis was used to prepare salbutamol sulfate dry powder. The engineered particles showed suitable characteristics for effective drug delivery to the lungs and demonstrated acceptable aerosolization performance. This newly introduced method appears to be capable of producing dry powder formulations of different drugs without the need for surfactants or stabilizers.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Ashley L. Nord, Patrice Dosset, Pierre Slangen, Manouk Abkarian
Summary: Phonation has been found to be a potent transmission route for the COVID-19 virus. To control transmission, it is important to measure the amount of aerosols produced by speech. Researchers used digital in-line holography to overcome experimental challenges and successfully imaged the formation and deformation of saliva filaments in the mouth during speech, as well as the resulting aerosolized droplets.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Yating Wang, Yiyang Zhang, Zhu Fang, Xinxin Wu
Summary: The research investigates the energy dissipation in particle-wall collision with roughness using the finite element method. The results show that the presence of surface roughness leads to lower viscoelastic dissipation and higher restitution coefficient compared to a smooth surface. The collision time is identified as a key factor in predicting the energy dissipation.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Shaamrit Balendra, Akshay Kale, Julie Pongetti, Mohsen Kazemimanesh, Molly Haugen, Lee Weller, Adam Boies
Summary: The measurement of airborne particles is important for detecting and characterising air pollution, emissions, fire detection, occupational and climate impacts. However, current optical particle counters (OPCs) cannot measure ultrafine particles. This study explores the limitations of miniaturising a condensation particle counter (CPC) growth chamber and provides a toolkit for optimising the design of miniaturised CPC-GCs.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Markus Snellman, Namsoon Eom, Maria E. Messing, Knut Deppert, Chris Hogan
Summary: Segregated bimetallic nanoparticles, such as core-shell nanoparticles, have attracted widespread interest in various fields like biomedicine, catalysis, and optoelectronics. Aerosol technology provides an optimal platform for controlling the size, structure, and composition of nanoparticles, which are crucial parameters for tuning the material performance for specific applications. In this study, researchers developed a novel evaporator design that allows on-line coating of core particles with a shell directly in the gas phase. By utilizing a local heater, the researchers were able to decouple the heating process of the evaporating material from the aerosol particles, thereby limiting core-shell alloying. The resulting core-shell particle formation with controllable shell thickness was demonstrated using evaporation of zinc onto core particles of gold, tin, and bismuth. Simple models were also discussed to explain the observed growth process inside the evaporator and the formation of the shell.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Kentaro Misawa, Yuto Kasai
Summary: In this study, the laser-induced fluorescence technique was used to observe scattered and fluorescent signals from fluorescent polystyrene latex particles. The ratio of fluorescence to scattered signal intensities was found to be almost equal for particles of the same size, allowing for the separate observation of mixed-size fluorescent particles. Relative fluorescence intensities were obtained by incorporating ratios of fluorescence to scattered signal and relative scattered signal intensities.
JOURNAL OF AEROSOL SCIENCE
(2024)
Article
Engineering, Chemical
Sripriya Nannu Shankar, William B. Vass, John A. Lednicky, Tracey Logan, Rebeccah L. Messcher, Arantzazu Eiguren-Fernandez, Stavros Amanatidis, Tara Sabo-Attwood, Chang-Yu Wu
Summary: This study introduces a testing system that allows for direct exposure of aerosolized viruses onto host cells. By collecting particles of different sizes and analyzing them, researchers obtained information on the concentration and viability of the virus at different particle sizes.
JOURNAL OF AEROSOL SCIENCE
(2024)
