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Frontiers of Environmental Science & Engineering 2024年第7期18卷 73-85页

作者： Sanggwon An Sangsoo Choi Hyeong Rae Kim jungho hwang School of Mechanical Engineering Yonsei UniversitySeoul 02876Republic of Korea Gas Metrology Group Korea Research Institute of Standards and Science(KRISS)Daejeon 34113Republic of Korea

The World Health Organization has raised concerns about the possibility of airborne transmission in enclosed and poorly ventilated ***,rapid monitoring of airborne viruses is necessary in multi-use facilities with dense ***,an electrostatic air sampler(250 L/min)was developed in this work to obtain indoor viral aerosol samples for analysis via the Polymerase Chain Reaction(PCR).Aerosol tests with H1N1 and HCoV-229E were performed to evaluate the sample collection *** analysis,along with another aerosol test,was conducted to evaluate the recovery of the virus particles collected by the *** laboratory tests,our electrostatic sampler obtained viral samples that were detectable by PCR under the simulated viral pandemic scenario(3000 RNA copies per cubic meter of air)within 40 *** resulting cycle threshold(C)values were 35.07 and 37.1 for H1N1 and HCoV-229E,*** the performance evaluation in the laboratory,field tests were conducted in a university classroom from October 28 to December 2,*** A and HCoV-229E were detected in two air samples,and the corresponding C,values were 35.3 and *** PCR results are similar to those obtained from laboratory tests,considering the simulatedviralpandemic scenario.

关键词： Airborne virus Electrostatic sampler Rapid monitoring Indoor environment Field test

Artificial Nanoscale Erythrocytes from Clinically Relevant Compounds for Enhancing Cancer Immunotherapy

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Nano-Micro Letters 2020年第7期12卷 156-174页

作者： Wenquan Ou Kang Sik Nam Dae Hoon Park jungho hwang Sae Kwang Ku Chul Soon Yong Jong Oh Kim Jeong Hoon Byeon College of Pharmacy Yeungnam UniversityGyeongsan 38541Republic of Korea School of Mechanical Engineering Yonsei UniversitySeoul 03722Republic of Korea College of Korean Medicine Daegu Haany UniversityGyeongsan 38610Republic of Korea School of Mechanical Engineering Yeungnam UniversityGyeongsan 38541Republic of Korea

Because of enhanced e cacy and lower side e ects,cancer immunotherapies have recently been extensively investigated in clinical trials to overcome the limitations of conventional cancer *** engineering attempts have been made to build nanosystems even including stimulus nanomaterials for the e cient delivery of antigens,adjuvants,or anticancer drugs to improve immunogenic cancer cell death,this requires huge R&D e orts and investment for clinically relevant findings to be approved for translation of the *** this end,in this study,an air–liquid two-phase electrospray was developed for stable bubble pressing under a balance between mechanical and electrical parameters of the spray to continuously produce biomimetic nanosystems consisting of only clinically relevant compounds[paclitaxel-loaded fake blood cell Eudragit particle(Eu-FBCP/PTX)]to provide a conceptual leap for the timely development of translatable chemo-immunotherapeutic *** was pursued as the e cacy of systems for delivering anticancer agents that has been mainly influenced by nanosystem shape because of its relevance to transporting behavior to organs,blood circulation,and cell–membrane *** resulting Eu-FBCP/PTX nanosystems exhibiting phagocytic and micropinocytic uptake behaviors can confer better e cacy in chemo-immunotherapeutics in the absence and presence of anti-PD-L1 antibodies than similar sized PTX-loaded spherical Eu particles(Eu-s/PTX).

关键词： Cancer immunotherapies Air–liquid two-phase electrospray Paclitaxel-loaded fake blood cell Eudragit particle Translatable chemo-immunotherapeutic nanosystems Anti-PD-L1 antibodies

Application of Electrical Means to Aerosol Technologies

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Application of Electrical Means to Aerosol Technologies

Bioaerosol: A Key Vessel between Environment and Health

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作者： jungho hwang School of Mechanical Engineering College of Engineering Yonsei University 134 Sinchon‐dong Seodaemun‐gu Seoul 120‐749 Korea

Electrical gas discharges have been widely used in aerosol technologies. In this talk, fundamentals of corona discharge and its applications are introduced. At atmospheric pressure and temperature, air can be partially ionized when a high electric field is present. Once generated, air ions are utilized to charge contaminant aerosol particles for the increase of aerosol filtration efficiency and also to inactivate bioaerosol particles suspended in air or captured in a filter. Aerosol charging by air ions and measurement of electrical current carried by charged aerosol particles can be applied to real‐time measurement of ambient aerosol particles or particulate matter emitted from diesel engine particles. The charged aerosol particles can also be introduced into a coaxial nozzle where a particle‐laden jet is formed with being shielded by sheath air flow and directed toward a substrate for aerosol printing. Spark discharge, one of electrical gas discharges, has been used to generate metallic aerosol nano particles, if a spark channel is formed when the applied voltage is beyond a critical value. The metallic particles can be used as catalyst for synthesis of carbon nanotubes and, antimicrobial agent for filter coating. In electrohydrodynamic atomization （EHDA） process, also referred to as electrospray process, highly charged, relatively monodisperse droplets of controlled size can be produced from various conditions of liquid solution material. Utilizing a coaxial nozzle and the cone jet mode of electrospray, a process for the synthesis of encapsulated particles is discussed. In addition, examples of printing metal and ceramic nanoparticles, which are contained in the liquid solution, onto a substrate for application to patterning of conductive line and insulator, respectively, will be stated.

关键词： Corona discharge spark discharge electrohydrodynamic atomization

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Frontiers of Environmental Science & Engineering 2021年第3期15卷 1-1页

作者： Jingkun Jiang Maosheng Yao jungho hwang Can Wang School of Environment Tsinghua UniversityBeijing 100084China College of Environmental Sciences and Engineering Peking UniversityBeijing 100087China Department of Mechanical Engineering Yonsei UniversitySeoul 03722Republic of Korea School of Environmental Science and Engineering Tianjin UniversityTianjin 300350China

Airborne transmission of infectious diseases has become a topic of intense debate since the outbreak of *** special issue entitled“Bioaerosol,Environment and Health”is organized in an effort to develop a better understanding of the roles bioaerosols play between environment and *** are generally described as airborne microorganisms with fragments and particulate matter of biological origin such as virus,bacteria,and fungal *** small biological particles can affect human health by causing infectious diseases,acute toxic reactions,and allergies.

关键词： aerosol aerosols entitled

Light-Material Interactions Using Laser and Flash Sources for Energy Conversion and Storage Applications

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Nano-Micro Letters 2024年第12期16卷 468-514页

作者： Jung Hwan Park Srinivas Pattipaka Geon-Tae hwang Minok Park Yu Mi Woo Young Bin Kim Han Eol Lee Chang Kyu Jeong Tiandong Zhang Yuho Min Kwi-Il Park Keon Jae Lee jungho Ryu Department of Mechanical Engineering(Department of Aeronautics Mechanical and Electronic Convergence Engineering)Kumoh National Institute of Technology61Daehak-RoGumiGyeongbuk 39177Republic of Korea Department of Materials Science and Engineering Pukyong National University45Yongso-RoNam-GuBusan 48513Republic of Korea Energy Technologies Area Lawrence Berkeley National LaboratoryBerkeleyCA 94720USA Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-RoYuseong-GuDaejeon 34141Republic of Korea Division of Advanced Materials Engineering Jeonbuk National UniversityJeonju 54896JeonbukRepublic of Korea School of Electrical and Electronic Engineering Harbin University of Science and TechnologyHarbin 150080People’s Republic of China Key Laboratory of Engineering Dielectrics and Its Application Ministry of EducationHarbin University of Science and TechnologyHarbin 150080People’s Republic of China Department of Materials Science and Metallurgical Engineering Kyungpook National University80 Daehak-RoBuk-GuDaegu 41566Republic of Korea School of Materials Science and Engineering Yeungnam UniversityDaehak-RoGyeongsan-Si 38541Gyeongsangbuk-doRepublic of Korea

This review provides a comprehensive overview of the progress in light-material interactions(LMIs),focusing on lasers and flash lights for energy conversion and storage *** discuss intricate LMI parameters such as light sources,interaction time,and fluence to elucidate their importance in material *** addition,this study covers various light-induced photothermal and photochemical processes ranging from melting,crystallization,and ablation to doping and synthesis,which are essential for developing energy materials and ***,we present extensive energy conversion and storage applications demonstrated by LMI technologies,including energy harvesters,sensors,capacitors,and *** the several challenges associated with LMIs,such as complex mechanisms,and high-degrees of freedom,we believe that substantial contributions and potential for the commercialization of future energy systems can be achieved by advancing optical technologies through comprehensive academic research and multidisciplinary collaborations.

关键词： Light Light-material interaction Nanomaterials Energy conversion and storage devices

一种可消除承印物影响的电流体动力喷墨打印技术

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中国印刷与包装研究 2009年第4期1卷 74-75页

作者： Jun-Sung Lee Young-Jae Kim Byeong-Geun Kang Sang-Yoon Kim Jaehong Park jungho hwang Yong-Jun Kim 胡新颖(编译) School of Mechanical Engineering Yonsei University Republic of Korea Samsung Electro-Mechanics Co. Ltd. Republic of Korea 不详

电流体动力喷墨打印技术(EHDP)已广泛应用于直接印刷。然而,现有的EHDP方法,其印刷特性受承印物的影响,且打印线宽由喷嘴的尺寸决定。本文提出的一种EHDP新方法能够消除承印物的影响,并且能够通过控制喷嘴阵列中每个喷嘴的开关来实现对... 详细信息

电流体动力喷墨打印技术(EHDP)已广泛应用于直接印刷。然而,现有的EHDP方法,其印刷特性受承印物的影响,且打印线宽由喷嘴的尺寸决定。本文提出的一种EHDP新方法能够消除承印物的影响,并且能够通过控制喷嘴阵列中每个喷嘴的开关来实现对打印线宽的控制。本文检验了EHDP系统的印刷特性,同时证明了喷嘴阵列开关控制的可行性。这种新型EHDP技术可以不受承印物的影响得到稳定的弯月形液面;即使使用同样的喷嘴也能得到不同的线宽。

关键词：电流体动力喷墨打印技术(EHDP) 承印物多嘴喷头

Capillary-force-induced collapse lithography for controlled plasmonic nanogap structures

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Microsystems & Nanoengineering 2020年第1期6卷 404-412页

作者： Inki Kim jungho Mun Wooseup hwang Younghwan Yang Junsuk Rho Department of Mechanical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Chemical Engineering Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea Department of Chemistry Pohang University of Science and Technology(POSTECH)Pohang 37673Republic of Korea National Institute of Nanomaterials and Technology(NINT) Pohang 37673Republic of Korea

The capillary force effect is one of the most important fabrication parameters that must be considered at the micro/nanoscale because it is strong enough to deform micro/***,the deformation of micro/nanostructures due to such capillary forces(e.g.,stiction and collapse)has been regarded as an undesirable and uncontrollable obstacle to be avoided during ***,we present a capillary-force-induced collapse lithography(CCL)technique,which exploits the capillary force to precisely control the collapse of micro/*** uses electron-beam lithography,so nanopillars with various shapes can be fabricated by precisely controlling the capillary-force-dominant cohesion process and the nanopillar-geometry-dominant collapse process by adjusting the fabrication parameters such as the development time,electron dose,and shape of the *** aims to achieve sub-10-nm plasmonic nanogap structures that promote extremely strong focusing of *** is a simple and straightforward method to realize such nanogap structures that are needed for further research such as on plasmonic nanosensors.

关键词： capillary structures collapse