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Fast ethylamine gas sensing based on intermolecular charge-transfer complexation

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Chinese Chemical Letters 2012年第4期23卷 484-487页

作者： Eun Mi Lee Seon young Gwon young A Son Sung Hoon kim BK21 FTIT Department of Advanced Organic Materials and Textile System EngineeringChungnam National UniversityDaejeon 305-764Republic of Korea Department of Textile System Engineering Kyungpook National UniversityDaegu 702-701 Republic of Korea School of Chemistry Science & Technology Zhanjiang Normal UniversityZhanjiang 524048China

We have investigated the fast ethylamine gas sensing of 2-chloro-3,5-dinitrobenzotrifluoride（CDBF） loaded poly（acrylonitrile） nanofiber based on an intermolecular charge-transfer *** response and recovery were ach... 详细信息

关键词： Ethylamine gas Fast gas sensing 2-Chloro-3 5-dinitrobenzotrifluoride(CDBF) Electrospinning PAN nanofiber Intermolecular charge-transfer(CT) complexation

Ever-changing endoscopic treatment for early gastric cancer:Yesterday-today-tomorrow

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World Journal of Gastroenterology 2014年第37期20卷 13273-13283页

作者： Mi-young kim Jun-Hyung Cho Joo young Cho Digestive Disease Center Soonchunhyang University Hospital

Endoscopic resection has been an optimal treatment for selected patients with early gastric cancer(EGC) based on advances in endoscopic instruments and techniques. As endoscopic submucosal dissection(ESD) has been widely used for treatment of EGC along with expanding ESD indication, concerns have been asked to achieve curative resection for EGC while guaranteeing precise prediction of lymph node metastasis(LNM). Recently, new techniques including ESD or endoscopic full-thickness resection combined with sentinel node navigation enable minimal tumor resection and a laparoscopic lymphadenectomy in cases of EGC with high risk of LNM. This review covers the development and challenges of endoscopic treatment for EGC. Moreover, a new microscopic imaging and endoscopic techniques for precise endoscopic diagnosis and minimally invasive treatment of EGC are introduced.

关键词： Endoscopic resection Early gastric cancer Confocal laser endomicroscopy Sentinel node navigation Hybrid natural orifice transluminal endoscopic surgery

Diagnostic value for extrahepatic metastases of hepatocellular carcinoma in positron emission tomography/computed tomography scan

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World Journal of Gastroenterology 2012年第23期18卷 2979-2987页

作者： Ji Eun Lee Jae young Jang Soung Won Jeong Sae Hwan Lee Sang Gyune kim Sang-Woo Cha young Seok kim young Deok Cho Hong Soo kim Boo Sung kim So young Jin Deuk Lin Choi Institution for Digestive Research Digestive Disease Center Department of Internal Medicine Soonchunhyang University Hospital Seoul 140-743 South Korea Institution for Digestive Research Digestive Disease Center Department of Internal Medicine Soonchunhyang University Hospital Cheon-an 330-721 South Korea Institution for Digestive Research Digestive Disease Center Department of Internal Medicine Soonchunhyang University Hospital Bu-cheon 420-767 South Korea Department of Pathology Soonchunhyang University Hospital Seoul 140-743 South Korea Department of Radiology Soonchunhyang University Hospital Seoul 140-743 South Korea

AIM: To evaluated the value of 18F-fluorodeoxyglucose (FDG) positron emission tomography (PET)/computed tomography (CT) scan in diagnosis of hepatocellular carcinoma (HCC) and extrahepatic metastases. METHODS: A total of 138 patients with HCC who had both conventional imaging modalities and 18F-FDG PET/CT scan done between November 2006 and March 2011 were enrolled. Diagnostic value of each imaging modality for detection of extrahepatic metastases was evaluated. Clinical factors and tumor characteristics including PET imaging were analyzed as indicative factors for metastases by univariate and multivariate methods. RESULTS: The accuracy of chest CT was significantly superior compared with the accuracy of PET imaging for detecting lung metastases. The detection rate of metastatic pulmonary nodule ≥ 1 cm was 12/13 (92.3%), when < 1 cm was 2/10 (20%) in PET imaging. The accuracy of PET imaging was significantly superior compared with the accuracy of bone scan for detecting bone metastases. In multivariate analy- sis, increased tumor size (≥ 5 cm) (P = 0.042) and increased average standardized uptake value (SUV) uptake (P = 0.028) were predictive factors for extrahepatic metastases. Isometabolic HCC in PET imaging was inversely correlated in multivariate analysis (P = 0.035). According to the receiver operating characteristic curve, the optimal cutoff of average SUV to predict extrahepatic metastases was 3.4. CONCLUSION: 18F-FDG PET/CT scan is invaluable for detection of lung metastases larger than 1 cm and bone metastases. Primary HCC having larger than 5 cm and increased average SUV uptake more than 3.4 should be considered for extrahepatic metastases.

关键词： ^ 18F-fluorodeoxyglucose positron emissiontomography/computed tomography scan Diagnosis Hepatocellular carcinoma ExtrahepaUc metastases

Passivation engineering via silica‐encapsulated quantum dots for highly sensitive photodetection

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Carbon Energy 2023年第9期5卷 49-62页

作者： Ji Yun Chun Byung Gi kim Jin young kim Woongsik Jang Dong Hwan Wang School of Integrative Engineering Chung‐Ang UniversitySeoulRepublic of Korea

Organometal halide perovskites are promising semiconducting materials for photodetectors because of their favorable optoelectrical *** nanoscale perovskite materials such as quantum dots(QDs)show novel behavior,they have intrinsic stability *** this study,an effectively silane barrier-capped quantum dot(QD@APDEMS)is thinly applied onto a bulk perovskite photosensitive layer for use in ***@APDEMS is synthesized with a silane ligand with hydrophobic CH_(3)-terminal groups,resulting in excellent dispersibility and durability to enable effective *** introduction of the QD@APDEMS layer results in the formation of a lowdefect perovskite film with enlarged *** is attributed to the grain boundary interconnection effect via interaction between the functional groups of QD@APDEMS and uncoordinated Pb^(2+)in grain *** passivating the grain boundaries,where various trap sites are distributed,hole chargecarrier injection and shunt leakage can be ***,from the energy point of view,the deep highest occupied molecular orbital(HOMO)level of QD@APDEMS can work as a hole charge injection *** charge dynamics(generation,transfer,and recombination properties)and reduced trap density of QD@APDEMS are *** this perovskite film is used in a photodetector,the device performance(especially the detectivity)stands out among existing perovskites evaluated for energy sensing device applications.

关键词： grain boundary passivation perovskite quantum dots photodetectors photosensitive layers trap

Advances in advanced solution-synthesis-based structural materials for tactile sensors and their intelligent applications

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InfoMat 2024年第1期6卷 31-64页

作者： Hongsen Niu Ning Li Eun-Seoung kim young Kee Shin Nam-young kim Guozhen Shen Yang Li School of Information Science and Engineering University of JinanJinanthe People's Republic of China RFIC Centre Department of Electronics EngineeringKwangwoon UniversitySeoulRepublic of Korea Department of Molecular Medicine and Biopharmaceutical Sciences Seoul National UniversitySeoulRepublic of Korea School of Integrated Circuits and Electronics Beijing Institute of TechnologyBeijingthe People's Republic of China School of Microelectronics Shandong UniversityJinanthe People's Republic of China

Intelligent applications,with tactile sensors at their core,represent significant advancement in the field of artificial ***,achieving perception abilities in tactile sensors that match or exceed human skin remains a formidable ***,the design and implementation of hierarchical structural materials are considered the optimal solution to this *** contrast to conventional methods,such as complicated lithography and three-dimensional printing,the cost-effective and scalable nature of advanced solution-synthesis methods makes them ideal for preparing diverse tactile sensors with hierarchical structural ***,the process and applicability of advanced solution synthesis methods have yet to form a seamless ***,the development and intellectualization of tactile sensors based on advanced solution synthesis methods are still in their early stages,and require a comprehensive and systematic review to usher in *** study delves into the advantages and disadvantages of various advanced solution synthesis methods,providing detailed ***,the positive effects of hierarchical structural materials constructed using these methods in tactile sensors and their intelligent applications are also discussed in ***,the challenges and future opportunities faced by this emerging field are summarized.

关键词： aqueous phase reduction artificial intelligence hydrothermal growth in situ polymerization tactile sensor

Nanocomposite quasi-solid-state electrolyte for high-safety lithium batteries

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Nano Research 2017年第9期10卷 3092-3102页

作者： Hyunji Choi Hyun Woo kim Jae-Kwang kim young Jun Lim youngsik kim Jou-Hyeon Ahn School of Energy & Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 689-798 Republic of Korea Department of Solar & Energy Engineering Cheongju University Cheongju Chungbuk 28503 Republic of Korea School of Energy & Chemical Engineering and Research Institute for Green Energy Convergence Technology Gyeongsang National University 900 Gajwa-dong Jinju 660-70 I Republic of Korea

Rechargeable lithium batteries are attractive power sources for electronic devices and are being aggressively developed for vehicular use. Nevertheless, problems with their safety and reliability must be solved for the large-scale use of lithium batteries in transportation and grid-storage applications. In this study, a unique hybrid solid-state electrolyte composed of an ionic liquid electrolyte (LiTFSI/Pyr14TFSI) and BaTiO3 nanosize ceramic particles was prepared without a polymer. The electrolyte exhibited high thermal stability, a wide electrochemical window, good ionic conductivity of 1.3 × 10−3 S·cm−1 at 30 °C, and a remarkably high lithium-ion transference number of 0.35. The solid-state LiFePO4 cell exhibited the best electrochemical properties among the reported solid-state batteries, along with a reasonable rate capability. Li/LiCoO2 cells prepared using this nanocomposite solid electrolyte exhibited high performance at both room temperature and a high temperature, confirming their potential as lithium batteries with enhanced safety and a wide range of operating temperatures.

关键词： nanocomposition solidified ionic liquid shell charge space safety lithium battery

Deposition and Characterization of (Ba, Sr)RuO3 Oxide Electrode Using TMHD-Based Single Cocktail Source

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Journal of Rare Earths 2004年第Z2期22卷 8-12页

作者： Hyun Chul kim Kyung Il Hong young Bae kim Duck Kyun Choi Department of Ceramic Engineering Hanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea Department of Ceramic EngineeringHanyang University17 Haengdang-dongSeongdong-kuSeoul 133-791Korea

(Ba, Sr)RuO3 has been paid an attention as a promising electrode for (Ba, Sr)TiO3 dielectric material due to its similarity in structure and chemical composition with BST. In this study, (Ba, Sr)RuO3 conductive oxide film was deposited on a 4 inch p-type Si wafer by metal organic chemical vapor deposition (MOCVD) using single cocktail source for the practical device application. Ba(TMHD)2, Sr(TMHD)2, Ru(TMHD)3 precursors and solvent [1-EtylePiPerdine (C7H15 N) ] as starting materials were mixed together for single cocktail source. A liquid delivery system (LDS) and a vaporization cell were utilized for the delivery and vaporization of single cocktail source, respectively. The source feeding rate was controlled by a liquid mass flow controller (LMFC). Deposition parameters, such as the oxygen flow and the source flow rate,were sensitive to phase formation, resistivity and the composition ratio of (Ba, Sr)RuO3 films. Highly (110)-textured (Ba,Sr)RuO3 film was obtained vhen the Ar/O2 ratio was 200/140 sccm at a source flow rate of 0.05 sccm. The process window of stoichiometric composition of BSR film was observed with varying the source flow rate from 0.05 sccm to 0.1 sccm.

关键词： (Ba, Sr)RuO3 (Ba, Sr)TiO3 MOCVD liquid delivery system(LDS) nozzle type injector

Holographic axion model: A simple gravitational tool for quantum matter

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Science China(Physics,Mechanics & Astronomy) 2021年第7期64卷 1-65页

作者： Matteo Baggioli Keun-young kim Li Li Wei-Jia Li Wilczek Quantum Center School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai200240China Shanghai Research Center for Quantum Sciences Shanghai201315China Instituto de Fisica Teorica UAM/CSIC Universidad Autonoma de MadridMadrid28049Spain School of Physics and Chemistry Gwangju Institute of Science and TechnologyGwangju61005Korea CAS Key Laboratory of Theoretical Physics Institute of Theoretical PhysicsChinese Academy of SciencesBeijing100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing100049China School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou310024China Institute of Theoretical Physics School of PhysicsDalian University of TechnologyDalian116024China

This is a complete and exhaustive review on the so-called holographic axion model—a bottom-up holographic system characterized by the presence of a set of shift symmetric scalar bulk fields whose profiles are taken to be linear in the spatial *** simple model implements the breaking of translational invariance of the dual field theory by retaining the homogeneity of the background geometry and therefore allowing for controllable and fast computations. The usages of this model are very vast and they are a proof of the spectacular versatility of the framework. In this review, we touch upon all the up-to-date aspects of this model from its connection with massive gravity and effective field theories, to its role in modeling momentum dissipation and elastic properties ending with all the phenomenological features and its hydrodynamic description. In summary, this is a complete guide to one of the most used models in Applied Holography and a must-read for any researcher entering this field.

关键词： gauge/gravity duality holographic axion translational symmetry breaking effective field theory

3D cellular visualization of intact mouse tooth using optical clearing without decalcification

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International Journal of Oral Science 2019年第3期11卷 223-230页

作者： Sujung Hong Jingu Lee Jin Man kim Sun-young kim Hyung-Ryong kim Pilhan kim Graduate School of Nanoscience and Technology Korea Advanced Institute of Science and Technology (KAIST)291 Daehak-roYuseong-guRepublic of Korea KI for Health Science and Technology (KIHST) Korea Advanced Institute of Science and Technology (KAIST)291 Deahak-roYuseong-guRepublic of Korea Department of Dentistry CHA Bundang Medical CenterCHA UniversitySeongnamRepublic of Korea Department of Conservative Dentistry and Dental Research Institute Seoul National University School of Dentistry101 Daehak-roJongno-guRepublic of Korea College of Dentistry Institute of Tissue Regeneration Engineering (ITREN)Dankook UniversityCheonanRepublic of Korea Graduate School of Medical Science and Engineering Korea Advanced Institute of Science and Technology (KAIST)291 Daehak-roYuseong-guRepublic of Korea

Dental pulp is composed of nerves,blood vessels,and various types of cells and surrounded by a thick and hard enamel-dentin *** to its importance in the maintenance of tooth vitality,there have been intensive efforts to analyze the complex cellularlevel organization of the dental pulp in *** conventional histologic analysis has provided microscopic images of the dental pulp,3-dimensional (3D) cellular-level visualization of the whole dental pulp in an intact tooth has remained a technically challenging *** is mainly due to the inevitable disruption and loss of microscopic structural features during the process of mechanical sectioning required for the preparation of the tooth sample for histological *** accomplish 3D microscopic observation of thick intact tissue,various optical clearing techniques have been developed mostly for soft tissue,and their application for hard tissues such as bone and teeth has only recently started to be *** this work,we established a simple and rapid optical clearing technique for intact mouse teeth without the time-consuming process of *** achieved 3D cellular-level visualization of the microvasculature and various immune cell distributions in the whole dental pulp of mouse teeth under normal and pathologic *** technique could be used to enable diverse research methods on tooth development and regeneration by providing 3D visualization of various pulpal cells in intact mouse teeth.

关键词： blood vessels Dental pulp soft tissue