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RISS 인기검색어
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- 저자 : Jeonghwi Choi (검색결과 2 건)
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Kang, Boseok,Park, Namwoo,Lee, Jeonghwi,Min, Honggi,Choi, Hyun Ho,Lee, Hwa Sung,Cho, Kilwon American Chemical Society 2015 Chemistry of materials Vol.27 No.13
<P>This study systematically demonstrates the effects of the grain structure of crystalline self-assembled monolayers (SAMs) on the growth of organic semiconductor thin films on such monolayers, as well as the electrical characteristics of the resulting semiconductor films. The grain structure of the octadecyltrichlorosilane (OTS) monolayers could be tailored by constructing the monolayers at three different temperatures: -30 degrees C (-30 degrees C OTS), -5 degrees C (-5 degrees C OTS), and 20 degrees C (20 degrees C OTS). Among the three layers, -30 degrees C OTS exhibited the largest crystalline grains and longest-range homogeneity of alkyl chain arrays. We found that pentacene films deposited on -30 degrees C OTS monolayers show larger crystalline grains with higher degrees of crystallinity and lateral alignment compared to that of films deposited on -5 degrees C OTS or 20 degrees C OTS monolayers, following the surface characteristics of the underlying OTS monolayers. Furthermore, pentacene field-effect transistors fabricated with 30 degrees C OTS monolayers showed lower charge trap densities and higher field-effect mobility values than devices fabricated using 5 or 20 degrees C OTS monolayers. These results are explained in terms of enhanced quasi-epitaxial growth of pentacene films on OTS monolayers with large grains.</P>
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Jisu Lee,Tae Sun Ha,Jeonghwi Choi,Yeonhwa Kwon,Zisun Kim 대한외상중환자외과학회 2020 Journal of Acute Care Surgery Vol.10 No.3
Bariatric patients are at risk of diverse complications, such as bowel obstruction, internal hernia,and mesenteric thrombosis, which can result in massive small bowel resection with short bowelsyndrome (SBS) as a consequence. In this study a case of an internal hernia after childbirth in a36-year-old patient with a history of laparoscopic Roux-en-Y gastric bypass surgery is reported. An emergency laparotomy revealed an internal hernia in Petersen’s space with volvulus, causingextensive small bowel infarction and necrosis. SBS is a complicated multifaceted syndrome whichrequires a multidisciplinary approach, such as medical, nutritional, and pharmaceutical therapies,to optimize fluid and nutrient absorption over long-term monitoring and with revisions of thecare plan. To reduce the morbidity and mortality associated with an internal hernia and volvulus,clinicians must be acutely aware of a potential SBS diagnosis and not delay surgical exploration, evenif the vital signs, laboratory results, and imaging studies are normal.
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