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Flammable carbon nanotube transistors on a nitrocellulose paper substrate for transient electronics

Nano Research 2017年第1期10卷 87-96页

作者： jinsu yoon Juhee Lee Bongsik Choi Dongil Lee Dae Hwan Kim Dong Myong Kim Dong-II Moon Meehyun lim Sungho Kim Sung-jin Choi School of Electrical Engineering Kookmin University Seou102707 Republic of Korea School of Electrical Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 3414 I Republic of Korea Center for Nanotechnology NASA Ames Research Center Moffett Field CA 94035 USA Test&Package Technology Group Mechatronics R&D Center Samsung Electronics Gyeonggi-do 18448 Repubfic of Korea Department of Electrical Engineering Sejong University Seou105006 Republic of Korea

Transient electronics represent an emerging class of technology comprising materials that can vanish in a controlled manner in response to stimuli. In contrast to conventional electronic devices that are designed to operate over the longest possible period, transient electronics are defined by operation typically over a short and well-defined period; when no longer needed, transient electronics undergo self-deconstruction and disappear completely. In this work, we demonstrate the fabrication of thermally triggered transient electronic devices based on a paper substrate, specifically, a nitrocellulose paper. Nitrocellulose paper is frequently used in acts of magic because it consists of highly flammable components that are formed by nitratil^g cellulose by exposure to nitric acid. Therefore, a complete and rapid destruction of electronic devices fabricated on nitrocellulose paper is possible without producing any residue （i.e., ash）. The transience rates can be modified by controlling radio frequency signal-induced voltages that are applied to a silver （Ag） resistive heater, which is stamped on the backside of the nitrocellulose paper. The Ag resistive heater was prepared by a simple, low-cost stamping fabrication, which requires no harsh chemicals or complex thermal treatments. For the electronics on the nitrocellulose paper substrate, we employed semiconducting carbon nanotube （CNT） network channels in the transistor for superior electrical and mechanical properties.

关键词： carbon nanotube,paper substrate,flammable,transient security

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Predictors of poor outcomes in patients with wild mushroom-induced acute liver injury

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World Journal of Gastroenterology 2017年第7期23卷 1262-1267页

作者： Taerim Kim Danbi Lee Jae Ho Lee yoon-Seon Lee Bum jin Oh Kyoung Soo lim Won Young Kim Department of Emergency Medicine University of Ulsan College of MedicineAsan Medical Center Department of Gastroenterology Asan Medical CenterUniversity of Ulsan College of Medicine

To identify early predictive markers of poor outcomes in patients with acute liver injury from wild mushroom *** observational, retrospective record review involved adults aged ≥ 18 years admitted to emergency department with mushroom intoxication from January 2005 to December 2015. The diagnosis of mushroom intoxication was based on the following: (1) a positive history of recent wild mushroom intake (either raw or cooked); (2) the onset of gastrointestinal symptoms, such as watery diarrhea, vomiting, and/or abdominal pain, after ingestion; and (3) the exclusion of other possible causes of acute liver injury. Acute liver injury was defined by a > 5-fold elevation of liver enzymes or moderate coagulopathy [international normalized ratio (INR) > 2.0]. Clinical and laboratory findings were compared in survivors and *** 93 patients with mushroom intoxication, 23, 11 men (47.8%) and 12 women (52.2%), of median age 61 years, developed acute liver injury. The overall in-hospital mortality rate was 43.5% (10/23). Among the laboratory variables, mean serum alkaline phosphatase (73.38 ± 10.89 mg/dL vs 180.40 ± 65.39 mg/dL, P 5 mg/dL or aPTT > 50 s on day 3 *** of bilirubin concentrations and aPTT may help in predicting clin

关键词： Mushroom Liver Outcome Intoxication Bilirubin

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Loose-fit graphitic encapsulation of silicon nanowire for one-dimensional Si anode design

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Journal of Materials Science & Technology 2017年第10期33卷 1120-1127页

作者： Seh-yoon lim Sudong Chae Su-Ho Jung Yuhwan Hyeon Wonseok Jang Won-Sub yoon Jae-Young Choi Dongmok Whang School of Advanced Materials Science and Engineering SKKU Advanced Institute of Nanotechnology Sungkyunkwan University Suwon 440-746 South Korea Department of Energy Sdence Sungkyunkwan University Suwon 440-746 South Korea

Silicon nanowires（SiNWs） encapsulated with graphene-like carbon sheath（GS） having a void space in between（SiNW@V@GS） are demonstrated for the improved electrochemical performance of Si anode in lithium ion battery. The Si NW@V@GS structure was synthesized by a scalable fabrication method including four successive reactions： metal-catalyzed CVD growth of Si NWs, controlled thermal oxidation, and deposition of the graphitic layer, to form Si NW@SiO2@GS and additional chemical etching of sacrificial SiO2 layer between Si NWs and carbon sheath. During the synthetic process, the thickness of the void spacing was controlled by adjusting the oxidation-dependent process. The well-controlled void space and crystalline graphitic carbon sheath of the SiNW@V@GS structure enable good reversible capacity of1444 m Ahg^（-1） and cycling stability of 85% over 150 cycles.

关键词： Lithium ion battery Silicon nanowire Graphene Void spacing Anode

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Reconstruction of the lower back wound with delayed infection after spinal surgery:A case report

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World Journal of Clinical Cases 2023年第27期11卷 6646-6652页

作者： DoWon Kim SooA lim SuRak Eo Jung Soo yoon Department of Plastic and Reconstructive Surgery DongGuk University Ilsan HospitalGoyang 10326South Korea

BACKGROUND Orthopedic surgeries after device implantation are susceptible to infections and may require device removal in the worst *** this reason,many efforts are being made to control infections after spinal surgery;however,the number of infec-tion cases is increasing owing to the increasing number of elderly *** SUMMARY A 75-year-old male with a chronic spinal defect due to previous spine surgery underwent reconstruction using a perforator-based island *** bursectomy and confirmation that there was no connection with the deep tissue,reconstruction was ***,wound disruption occurred with abscess formation on postoperative day 29,which led to an imaging workup revealing delayed deep tissue *** Infection is one of the most common causes of surgical wound dehiscence and is associated with devastating results if not controlled promptly and *** should always suspect delayed infections when reconstructing chronic soft tissue defects.

关键词： Surgical wound dehiscence Surgical wound infection Lumbar spine Complications Abscess Case report

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Impression of prognosis regarding pathologic stage after preoperative chemoradiotherapy in rectal cancer

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World Journal of Gastroenterology 2015年第2期21卷 563-570页

作者： Kyungyeon Hwang In Ja Park Chang Sik Yu Seok-Byung lim Jong Lyul Lee Yong Sik yoon Chan Wook Kim jin Cheon Kim Department of Colon and Rectal Surgery University of Ulsan College of Medicine and Asan Medical CenterSeoul 138-736South Korea

AIM: To ascertain pathologic stage as a prognostic indicator for rectal cancer patients receiving preoperative chemoradiotherapy(PCRT).METHODS: Patients with mid- and low rectal carcinoma(magnetic resonance imaging- based clinical stage Ⅱ or Ⅲ) between 2000 and 2009 and treated with curative radical resection were identified. Patients were divided into two groups: PCRT and No-PCRT. Recurrence-free survival(RFS) was examined according to pathologic stage and addition of adjuvant ***: Overall, 894 patients were identified. Of these, 500 patients received PCRT. Adjuvant chemotherapy was delivered to 81.5% of the No-PCRT and 94.8% of the PCRT patients. Adjuvant radiotherapy was given to 29.4% of the patients in the No PCRT group. The 5-year RFS for the No-PCRT group was 92.6% for StageⅠ, 83.3% for Stage Ⅱ, and 72.9% for Stage Ⅲ. The 5-year RFS for the PCRT group was 95.2% for yp Stage 0, 91.7% for yp StageⅠ, 73.9% for yp Stage Ⅱ, and 50.7% for yp Stage Ⅲ.CONCLUSION: Pathologic stage can predict prognosis in PCRT patients. Five-year RFS is significantly lower among PCRT patients than No-PCRT patients in pathologic stage Ⅱ and Ⅲ. These results should be taken into account when considering adjuvant treatment for patients treated with PCRT.

关键词： Preoperative Chemoradiotherapy Rectal cancer Patho

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Friction stir butt welding of A5052-O aluminum alloy plates

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中国有色金属学会会刊：英文版 2012年第S3期22卷 619-623页

作者： Sung-Ook yoon Myoung-Soo KANG Hyun-Bin NAM Yong-Jai KWON Sung-Tae HONG jin-Chun KIM Kwang-Hak LEE Chang-Yong lim Jong-Dock SEO School of Materials Science and Engineering University of Ulsan School of Mechanical Engineering University of Ulsan Technical Research Laboratories Shin Young Co.Ltd.

Friction stir butt welding (FSW) between A5052-O aluminum alloy plates with a thickness of 2 mm was *** rotation speeds of the welding tool were 2000 and 3000 r/min,*** traverse speed was ranged from 100 mm/min to 900 mm/*** defect-free welds with the very smooth surface morphology were successfully obtained,except for at the welding condition of 3000 r/min and 100 mm/*** onion ring structure was observed in the friction-stir-welded zone (SZ) at the condition of 2000 r/min and 100 mm/*** all the welding conditions,the grain size of the SZ was smaller than that of the base metal,and was decreased with the decrease of the tool rotation speed and with the increase of the tool traverse *** stir zone exhibited higher average hardness than the base *** decrease of the tool rotation speed and the increase of the tool traverse speed resulted in the increase in the average hardness of the *** tensile strength of the FSWed plates was similar to that of the base metal,except for at the welding condition of 3000 r/min and 100 mm/*** total elongation of the FSWed plates was lower than that of the base metal.

关键词： friction stir butter welding A5052-O aluminum alloy microstructure mechanical property

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Effects of Mg Enhancement and Heat Treatment on Microstructures and Tensile Properties of Al2Ca-Added ADC12 Die Casting Alloys

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Journal of Materials Science & Technology 2016年第10期32卷 1043-1048页

作者： Gil-Yong Yeom Hyun Kyu lim Shae K.Kim Soong-Keun Hyun Young-Ok yoon Korea Institute of Industrial Technology lncheon 406-840 South Korea Department of Materials Science and Engineering Inha University lncheon 402-751 South Korea

The effects of Mg enhancement and heat treatment on the microstructures and tensile properties of Al_2Ca-added ADC12 die casting alloys were investigated. 0.3% and 0.5% Mg in the form of a master alloy including a trace amount of Al_2Ca were added to conventional ADC12（383 and AlSi10Cu2Fe） alloy with an initial Mg-content of 0.3% to increase the Mg content to 0.6% and 0.8%, respectively. To avoid heat treatmentinduced surface blisters, shortened solution treatment for 15 min at 490 ℃ and artificial aging for 6 h at 150 ℃ was undertaken. The results show that a 10% improvement in the shape factor of eutectic Si particles was achieved for Al_2Ca-added ADC12 with 0.8% Mg compared to the conventional ADC12 in the as-aged condition. Al_2Ca-added ADC12 with 0.8% Mg exhibited a yield strength of 289 MPa, a tensile strength of 407 MPa, and an elongation of 4.22%.

关键词： Al2Ca ADC12 alloy Heat treatment Die casting Inclusion

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Investigation of cell mechanics using single-beam acoustic tweezers as a versatile tool for the diagnosis and treatment of highly invasive breast cancer cell lines: an in vitro study

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Microsystems & Nanoengineering 2020年第1期6卷 927-938页

作者： Hae Gyun lim Hsiao-Chuan Liu Chi Woo yoon Hayong Jung Min Gon Kim Changhan yoon Hyung Ham Kim KKirk Shung Department of Creative IT Engineering Pohang University of Science and TechnologyPohang 37673Republic of Korea NIH Resource Center for Medical Ultrasonic Transducer Technology and Department of Biomedical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Department of Biomedical Engineering Inje UniversityGimhaeGyeongnam 50834Republic of Korea

Advancements in diagnostic systems for metastatic cancer over the last few decades have played a significant role in providing patients with effective treatment by evaluating the characteristics of cancer *** the progress made in cancer prognosis,we still rely on the visual analysis of tissues or cells from histopathologists,where the subjectivity of traditional manual interpretation *** paper presents the development of a dual diagnosis and treatment tool using an in vitro acoustic tweezers platform with a 50MHz ultrasonic transducer for label-free trapping and bursting of human breast cancer *** cancer cell detection and classification,the mechanical properties of a single cancer cell were quantified by single-beam acoustic tweezers(SBAT),a noncontact assessment tool using a focused acoustic ***-mimicking phantoms and agarose hydrogel spheres(AHSs)served to standardize the biomechanical characteristics of the *** on the analytical comparison of deformability levels between the cells and the AHSs,the mechanical properties of the cells could be indirectly measured by interpolating the Young’s moduli of the *** a result,the calculated Young’s moduli,i.e.,1.527kPa for MDA-MB-231(highly invasive breast cancer cells),2.650kPa for MCF-7(weakly invasive breast cancer cells),and 2.772 kPa for SKBR-3(weakly invasive breast cancer cells),indicate that highly invasive cancer cells exhibited a lower Young’s moduli than weakly invasive cells,which indicates a higher deformability of highly invasive cancer cells,leading to a higher metastasis ***-cell treatment may also be carried out by bursting a highly invasive cell with high-intensity,focused ultrasound.

关键词： diagnosis treatment weakly

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Ratio of metastatic lymph nodes is more important for rectal cancer patients treated with preoperative chemoradiotherapy

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World Journal of Gastroenterology 2015年第11期21卷 3274-3281页

作者： In Ja Park Chang Sik Yu Seok-Byung lim Yong Sik yoon Chan Wook Kim Tae Won Kim Jong Hoon Kim jin Cheon Kim Department of colon and rectal Surgery University of Ulsan College of Medicine and Asan Medical Center Department of Medical Oncology University of Ulsan College of Medicine and Asan Medical Center Department of Radiation Oncology University of Ulsan College of Medicine and Asan Medical Center

AIM:To evaluate the predictive value of the lymph node(LN) ratio(LNR,number of metastatic LNs/ examined LNs) for recurrence in patients with rectal cancer and to compare its applicability according to preoperative chemoradiotherapy(PCRT).METHODS:From 2000 to 2009,967 patients with metastatic LNs after curative resection for locally advanced rectal cancer were *** were categorized according to PCRT(PCRT vs No PCRT).The cut-off LNR was determined based on the p N1 vs p N2 when the recommended number of LNs was *** 5-year recurrence-free survival(RFS) rates using the Kaplan-Meier method were compared according to p/yp N stage and the LNR in each ***:Among patients with the same p/yp N stage,the 5-year RFS rate differed according to the *** addition,the 5-year RFS rate was significantly different between p N and LNR groups in patients with No *** PCRT group,however,only LNR was associated with *** multivariate analysis,both p N and LNR were significant independent prognostic factors for 5-year RFS in the No PCRT *** the PCRT group,only LNR category was found to be associated with RFS(HR = 2.36,95%CI:1.31-3.84,and P = 0.001).CONCLUSION:The LNR is an important prognostic predictor of RFS in rectal cancer patients especially treated with *** p N categories could not discriminate between prognostic groups of RFS after PCRT.

关键词： Rectal cancer Preoperative chemoradiotherapy Lymph

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Postoperative changes of manometry after restorative proctocolectomy in Korean ulcerative colitis patients

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World Journal of Gastroenterology 2017年第31期23卷 5780-5786页

作者： se heon oh yong sik yoon jong lyul lee chan wook kim in ja park seok-byung lim chang sik yu jin cheon kim department of surgery division of colon and rectal surgery university of ulsan college of medicine asan medical center

To investigate the changes of postoperative anal sphincter function and bowel frequency in Korean patients with ulcerative colitis (UC). METHODSA total of 127 patients with UC who underwent restorative proctocolectomy (RPC) during 20 years were retrospectively analyzed. The parameters of anal manometry and bowel frequency were compared according to the 6-mo intervals until 24 mo postoperatively. Manometry was used to measure the maximal squeezing pressure (MSP) and maximal resting pressure (MRP). RESULTSMSP decreased after surgery until 6 mo (157 to 142 mmHg); thereafter, it improved and was recovered to and maintained at the preoperative value at 12 mo postoperatively (142-170 mmHg, P < 0.001). Although the decreased MRP (65 to 56 mmHg) improved after 18 mo (62 mmHg), it did not completely recover to the preoperative value. The decreased rectal capacity after surgery (90 to 82 mL) gradually increased up to 150 mL at 24 mo. Although bowel frequency showed significant gradual decreases at each interval, it was stabilized after 12 mo postoperatively (6.5 times/d). CONCLUSIONPostoperative changes of manometry and bowel frequency after restorative proctocolectomy in Korean patients with UC were not different from those in Western patients with UC.

关键词： Ulcerative colitis Surgery Treatment outcome Manometry Bowel frequency Restorative proctocolectomy

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