A5101525884- Viral gastroenteritis research and epidemiology
- Respiratory viral infections research
- Viral Infections and Immunology Research
- Animal Virus Infections Studies
- Perovskite Materials and Applications
- Blood groups and transfusion
- Blood disorders and treatments
- Parvovirus B19 Infection Studies
- Organic Light-Emitting Diodes Research
- Conducting polymers and applications
- Virus-based gene therapy research
- Blood transfusion and management
- Nitric Oxide and Endothelin Effects
- CAR-T cell therapy research
- Immunodeficiency and Autoimmune Disorders
- Cutaneous lymphoproliferative disorders research
- Erythrocyte Function and Pathophysiology
- Hemoglobinopathies and Related Disorders
- Bartonella species infections research
- Tracheal and airway disorders
- Multiple Myeloma Research and Treatments
- Cytomegalovirus and herpesvirus research
- Organic Electronics and Photovoltaics
- Lymphoma Diagnosis and Treatment
- Hepatitis B Virus Studies
Seoul National University
2018-2024
Hanyang University
2020-2021
Anyang University
2021
Government of the Republic of Korea
2021
California NanoSystems Institute
2018-2020
Inje University Sanggye Paik Hospital
2011-2020
University of California, Los Angeles
2001-2020
Los Angeles City College
2018
Pohang University of Science and Technology
2011-2016
Inje University
2004-2014
Compositional engineering has been used to overcome difficulties in fabricating high-quality phase-pure formamidinium perovskite films together with its ambient instability. However, this comes alongside an undesirable increase bandgap that sacrifices the device photocurrent. Here we report fabrication of formamidinium-lead tri-iodide excellent optoelectronic quality and stability. Incorporation 1.67 mol% 2D phenylethylammonium lead iodide into precursor solution enables formation order...
Abstract Manipulation of grain boundaries in polycrystalline perovskite is an essential consideration for both the optoelectronic properties and environmental stability solar cells as solution-processing films inevitably introduces many defects at boundaries. Though small molecule-based additives have proven to be effective defect passivating agents, their high volatility diffusivity cannot render robust enough against harsh environments. Here we suggest design rules molecules by considering...
The Lewis acid–base adduct approach has been widely used to form uniform perovskite films, which provided a methodological base for the development of high-performance solar cells. However, its incompatibility with formamidinium (FA)-based perovskites impeded further enhancement photovoltaic performance and stability. Here, we report an efficient reproducible method fabricate highly FAPbI3 films via approach. Replacement typical dimethyl sulfoxide (DMSO) N-methyl-2-pyrrolidone (NMP) enabled...
Abstract The operational instability of perovskite solar cells (PSCs) is known to mainly originate from the migration ionic species (or charged defects) under a potential gradient. Compositional engineering “A” site cation ABX 3 structure has been shown be an effective route improve stability PSCs. Here, effect size‐mismatch‐induced lattice distortions on ion energetics and PSCs investigated. It observed that size mismatch mixed composition films devices leads steric impede pathways ions...
Because the direct formation of large, patterned graphene layers on active electronic devices without any physical transfer process is an ultimate important research goal for practical applications, we first developed a cost-effective, scalable, and sustainable to form films from solution-processed common polymers directly SiO2/Si substrate. We obtained few-layer by heating thin polymer covered with metal capping layer in high-temperature furnace under low vacuum Ar/H2 atmosphere. find that...
Dendritic cells (DCs) are often produced by granulocyte-macrophage colony-stimulating factor (GM-CSF) and interleukin-4 (IL-4) stimulation of monocytes. To improve the effectiveness DC adoptive immune cancer therapy, many different agents have been used to mature DCs. We analyzed kinetics maturation lipopolysaccharide (LPS) interferon-γ (IFN-γ) induction in order characterize usefulness DCs (mDCs) for therapy identify biomarkers assessing quality mDCs. Peripheral blood mononuclear were...
Abstract Although conventional p-type doping using small molecules on graphene decreases its sheet resistance ( R sh ), it increases after exposure to ambient conditions, and this problem has been considered as the biggest impediment practical application of electrodes. Here, we report an extremely stable electrode doped with macromolecular acid (perfluorinated polymeric sulfonic (PFSA)) a dopant. The PFSA provides not only ultra-high stability for very long time (> 64 days) but also high...
Single-walled carbon nanotubes (CNTs) has been considered as a promising material for top electrode of perovskite solar cells owing to its hydrophobic nature, earth-abundance, and mechanical robustness. However, poor conductivity, shallow work function, nonreflective nature have limited further enhancement in power conversion efficiency (PCE) CNT electrode-based cells. Here, we introduced simple scalable method address these issues by utilizing an ex-situ vapor-assisted doping method....
Perspectives and strategies of flexible/stretchable perovskite optoelectronics are suggested for portable or wearable applications.
Nitric oxide (NO) activates soluble guanylyl cyclase in smooth muscle cells to induce vasodilation the vasculature. However, as hemoglobin (Hb) is an effective scavenger of NO and present high concentrations inside red blood cell (RBC), bioavailability would be too low elicit activation presence blood. Therefore, bioactivity must preserved. Here we evidence suggesting that RBC participates preservation by reducing influx. The uptake RBCs was increased decreased altering degree band 3 binding...
The idea that human bocavirus (hBoV) infection possibly plays a role in gastroenteritis has been suggested because of the frequent manifestation gastrointestinal symptoms. purpose this study was to investigate prevalence hBoV children with gastroenteritis. We studied etiologic agents 962 hospitalized Viral were detected by enzyme-linked immunosorbent assay or reverse-transcriptase polymerase chain reaction. A viral agent found 44.4% population: rotavirus, norovirus, adenovirus, and...
We report on the development of flexible organic solar cells (OSCs) incorporating graphene sheets synthesized by chemical vapor deposition (CVD) as transparent conducting electrodes polyethylene terephthalate (PET) substrates. A key barrier that must be overcome for successful fabrication OSCs with is poor-film properties water-based poly(3,4-ethylenedioxythiphene):poly(styrenesulfonate) (PEDOT:PSS) when coated onto hydrophobic surfaces. To form a uniform PEDOT:PSS film surface, we added...
This communication reports the discovery of an effective and long-lasting p-type dopant polymeric acid for transparent carbon electrodes.
The present study systematically investigates the morphology and crystallization process of inorganic CsPbBr3 perovskite layer films fabricated by thermal coevaporation in conjunction with continuous low-temperature annealing to promote situ dynamic crystallization. results confirm for first time that both crystal grain size compactness can be tuned during fabrication via performance PeLEDs employing as emitter is investigated detail respect substrate temperature deposition rate employed...
Understanding the interaction of nitric oxide (NO) with red blood cells (RBCs) is vital to elucidating metabolic fate NO in vasculature. Because hemoglobin (Hb) most abundant intraerythrocytic protein and reacts rapidly NO, Hb has been studied extensively. We others have shown reaction RBCs nearly 1,000-fold slower than cell-free Hb. rate quite different, we hypothesize that different products evolve under locally high concentrations, which can be generated by bolus addition or inhalation....
This study presents the first evidence of human bocavirus infection in South Korean children. The virus was detected 27 (8.0%) 336 tested specimens, including 17 (7.5%) 225 virus-negative collected from children with acute lower respiratory tract infection.
Abstract In South Korea, WU polyomavirus (WUPyV) was detected in 34 (7%) of 486 children with acute lower respiratory tract infections, 3 (4.2%) 72 asymptomatic children, and as coinfection other viruses 23 (67.6%) children. Although WUPyV frequently detected, its clinical role has not been distinguished from that coinfecting viruses.
Abstract The etiologic role of recently identified respiratory viruses for acute wheezing in children is not yet clear. purpose this study was to investigate the prevalence viruses, including human metapneumovirus (hMPV), bocavirus (hBoV), coronavirus NL63 (hCoV‐NL63), and HKU1 (hCoV‐HKU1) with wheezing. Viral etiology 231 hospitalized wheezing, aged from 1 month 5 years. antigens common were detected by IFA or multiplex PCR. RT‐PCR used detect rhinoviruses, hCoV‐NL63, hCoV‐HKU1, hMPV. PCR...
Ultimate flexible organic light-emitting diodes (OLEDs) should have an ultra-high device efficiency, a low-efficiency roll-off at high luminance and excellent flexibility. Here, we realized tandem OLEDs using graphene anode with very electroluminescent efficiency of ~205.9 cd A−1, 45.2% (~396.4 87.3% hemispherical lens) low ~6.6% 10 000 m−2 (~3.8% by stacking two electroluminescence (EL) units. For the first time, used easily controlled low-temperature processable charge generation layer...
Sejong Chun, M.D., Chi Ryang Chung, Young Eun Ha, Tae Hee Han, Chang-Seok Ki, Eun-Suk Kang, Jin Kyeong Park, Kyong Ran Peck, and Duck Cho, M.D.. Ann Lab Med 2016;36:393-5. https://doi.org/10.3343/alm.2016.36.4.393