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Isolation Effect on Organic Thin Film Transistors for Low Hysteresis Characteristics
Jung Hun Lee,Chan Hoe Ku,Gi Heon Kim,Jae Bon Koo,Jin Jang,Jung Wook Lim,Kyung Soo Suh,Sang Chul Lim,Seong Hyun Kim,Sun Jin Yun 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.49 No.3
Pentacene-based organic thin film transistors (OTFTs) show a relative degradation of their electric characteristics, especially hysteresis, because the pentacene active layer is very susceptible to moisture, oxygen, and other ambient conditions. For commercial applications of organic devices, the stability of the organic materials is one of the most important issues. Therefore, if stable OTFTs are to be produced, it is necessary to develop methods to protect them from damage. In this study, an optimized buffer layer was used to reduce the hysteresis characteristics. We fabricated hysteresis-free OTFTs with less damage by using this buffer layer. We also fabricated a p-type metal-oxide semiconductor (pMOS) inverter by using OTFTs with isolation layers, and we measured its electrical properties.
Jung, Hye-In,Nandhakumar, Raju,Yoon, Hoe-Jin,Lee, Sang-Gi,Kim, Kwan-Mook Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.5
Novel $H_8$-binaphthol-based chiral receptors appended with an uryl moiety (2a) and a guanidinium moiety (2b) have been designed and synthesized for the enantioselective recognition of 1,2-amino alcohols via reversible imine formation. The selectivities ($K_R/K_S$ = 9.8 ~ 19.4) of 2b in imine formation with 1,2-amino alcohols are higher than those of 2a ($K_R/K_S$ = 1.8 ~ 4.5). Similar efficiency trend have been observed in the conversion of L-amino acids to D-amino acids, i.e., the efficiency of the receptor 2b (D/L ratio: 4.3 ~ 10.1) is superior to 2a (D/L ratio: 4.0 ~ 8.7).
Self-assembly growth process for polyhedral oligomeric silsesquioxane cubic crystals
Jung, Chan Yoon,Kim, Hae Sung,Hah, Hoe Jin,Koo, Sang Man Royal Society of Chemistry 2009 Chemical communications Vol.2009 No.10
<P>The colloidal self-assembly process for the formation of polyhedral oligomeric silsesquioxane cubic crystals is described; the growth process consists of the formation of spherical particles, one-dimensional particle chains, bundles of chains, and finally, the formation of cubic crystals.</P> <P>Graphic Abstract</P><P>The growth process of cubic POSS crystals consists of (a) the formation of spherical particles, (b) one-dimensional particle chains, (c) bundles of chains, and (d) the formation of cubic crystals. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=b816454a'> </P>
( Hoe Jeong Chung ),( Seong-yup Kim ),( Chun Sung Byun ),( Ki-youn Kwon ),( Pil Young Jung ) 대한외상학회 2016 大韓外傷學會誌 Vol.29 No.4
For an orthopaedic surgeon, the critical decisions to either amputate or salvage a limb with severe crushing injury with progressive ischemic change due to arterial rupture or occlusion can become a clinical dilemma at the Emergency Department (ED). And reperfusion injury is one of the fetal complications after vascular reconstruction. The authors present a case which was able to save patient`s life by rapid vessel ligation at bedside to prevent severe reperfusion injury. A 43-year-old male patient with no pre-existing medical conditions was transported by helicopter to Level I trauma center from incident scene. Initial result of extended focused assessment with sonography for trauma (eFAST) was negative. The trauma series X-rays at the trauma bay of ED showed a multiple contiguous rib fractures with hemothorax and his pelvic radiograph revealed a complex pelvic trauma of an Anterior Posterior Compression (APC) Type II. Lower extremity computed tomography showed a discontinuity in common femoral artery at the fracture site and no distal run off. Surgical finding revealed a complete rupture of common femoral artery and vein around the fracture site. But due to the age aspect of the patient, the operating team decided a vascular repair rather than amputation even if the anticipated reperfusion time was 7 hours from the onset of trauma. Only two hours after the reperfusion, the patient was in a state of shock when his arterial blood gas analysis (ABGA) showed a drop of pH from 7.32 to 7.18. An imminent bedside procedure of aseptic opening the surgical site and clamping the anastomosis site was taken place rather than undergoing a surgery of amputation because of ultimately unstable vital sign. The authors would like to emphasize the importance of rapid decision making and prompt vessel ligation which supply blood flow to the ischemic limb to increase the survival rate in case of profound reperfusion injury. [ J Trauma Inj 2016; 29: 204-208 ]
A Case of Ibuprofen Induced Transient Platelet Dysfunction in Preterm Infant
( Jung Yoon Cho ),( Jae Hoe Koo ),( Sung-hoon Chung ),( Chong-woo Bae ),( Yong-sung Choi ) 대한주산의학회 2016 大韓周産醫學會雜誌 Vol.27 No.3
Patent ductus arteriosus (PDA) in preterm infant is a common cardiovascular disease that result in hemodynamic disturbance. Ibuprofen treatment is currently being used for PDA closure either intravenously or enterally, and it has been demonstrated that ibuprofen have the same efficacy as indomethacin treatment for PDA closure. We encountered a case of severe gastrointestinal bleeding occurred in the administration of oral ibuprofen for the treatment of PDA in preterm infant. It was diagnosed with a transient platelet dysfunction due to oral ibuprofen treatment by analyzing through the Platelet function analysis (PFA) test. We present this case to emphasize the importance of close follow-up of preterm infant during oral ibuprofen treatment even though good enteral feeding.