Search Results - "Choi, Junghun"
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Design of an Impedance-Controlled Hot Snare Polypectomy Device
Published in Sensors (Basel, Switzerland) (24-12-2019)“…This paper goes through the process of first designing a feedback system that allows for the measuring of impedance while using the hot snare polypectomy…”
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Development of a Segmental Bioelectrical Impedance Spectroscopy Device for Body Composition Measurement
Published in Sensors (Basel, Switzerland) (06-11-2019)“…Whole-body bioelectrical impedance analysis for measuring body composition has been well-explored but may not be sensitive enough to changes in the trunk…”
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Covalent Functionalization of Epitaxial Graphene by Azidotrimethylsilane
Published in Journal of physical chemistry. C (04-06-2009)“…Chemically modified epitaxial graphene (EG) by azidotrimethylsilane (ATS) was investigated using high-resolution photoemission spectroscopy (HRPES). Through…”
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Controlled Voltage of Hot Snare Polypectomy Device in Electrosurgical Device
Published in Journal of engineering (Cairo, Egypt) (21-12-2023)“…The study aimed to understand the working procedure of the Olympus PSD-30 Electrosurgical Unit, in which a high-frequency alternating current measures the…”
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Chemical Doping of Epitaxial Graphene by Organic Free Radicals
Published in The journal of physical chemistry letters (21-01-2010)“…Chemical doping of epitaxial graphene (EG) by organic free radicals (4-amino-2,2,6,6-tetramethyl-1-piperridinyloxy; 4-amino-TEMPO) was investigated using…”
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Atomic-Scale Investigation of Epitaxial Graphene Grown on 6H-SiC(0001) Using Scanning Tunneling Microscopy and Spectroscopy
Published in Journal of physical chemistry. C (12-08-2010)“…Graphene was epitaxially grown on a 6H-SiC(0001) substrate by thermal decomposition of SiC under ultrahigh vacuum conditions. Using scanning tunneling…”
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Effects of 1 MeV Electron Beam Irradiation on Multilayer Graphene Grown on 6H-SiC(0001)
Published in Journal of physical chemistry. C (28-08-2008)“…Graphene layers grown on 6H-SiC(0001) were irradiated with 1 MeV electron beam to functionalize its surface. A surface analysis using atomic force microscopy,…”
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Scanning Photoemission Microscopy of Graphene Sheets on SiO2
Published in Advanced materials (Weinheim) (02-10-2008)“…Scanning photoemission microscopy (SPEM) images of a graphene flake as well as the C 1s core level spectra for the mono‐ and multilayer graphene are measured…”
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Unidirectional Pt silicide nanowires grown on vicinal Si(100)
Published in The Journal of chemical physics (07-03-2008)“…We investigated the structure and electronic properties of unidirectional Pt(2)Si nanowires (NWs) grown on a Si(100)-2 degrees off surface. We found that…”
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10
Extension Mechanism of a Flexible End for Colonoscopy
Published in Medical devices (Auckland, N.Z.) (01-01-2020)“…The significance of the distal tip extension mechanism (DTEM) arises when the insertion tube of the colonoscope is no longer able to move further inside the…”
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Morphology-controlled synthesis of ternary Pt–Pd–Cu alloy nanoparticles for efficient electrocatalytic oxygen reduction reactions
Published in Applied catalysis. B, Environmental (01-09-2015)“…[Display omitted] •Morphology-controlled synthesis of ternary Pt–Pd–Cu alloy nanoparticles was accomplished.•Control over the degree of galvanic substitutions…”
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One-step synthesis of carbon-supported Pd@Pt/C core-shell nanoparticles as oxygen reduction electrocatalysts and their enhanced activity and stability
Published in Nanoscale (21-04-2014)“…A close encounter with reality on core-shell catalysts for fuel cells: the outstanding significance of the work is (i) suggestion of a computational…”
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Evidence of Chemical Functionalized Molecules Adsorbed on the Interface Region of Epitaxial Graphene: Interface Roughness and Modification of the Electronic Properties
Published in Journal of physical chemistry. C (29-09-2011)“…We investigate the variation of the electronic properties and morphological surface change of epitaxial graphene (EG) by chemically functionalizing the…”
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Structural and Electronic Properties of Cobalt Germanide Islands on Ge(100)
Published in Journal of physical chemistry. C (20-05-2010)“…The structure and electronic properties of cobalt germanide islands were studied by scanning tunneling microscopy (STM). We found that cobalt-rich surfaces…”
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Detection of endoscopic looping during colonoscopy procedure by using embedded bending sensors
Published in Medical devices (Auckland, N.Z.) (01-01-2018)“…Looping of the colonoscope shaft during procedure is one of the most common obstacles encountered by colonoscopists. It occurs in 91% of cases with the…”
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The Lowest On-Resistance and Robust 130nm BCDMOS Technology implementation utilizing HFP and DPN for mobile PMIC applications
Published in 2019 31st International Symposium on Power Semiconductor Devices and ICs (ISPSD) (01-05-2019)“…BCD technology has been the workhorse of several critical products in the mobile market. Aggressive design rule and architectural modifications are being…”
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Conference Proceeding
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Novel evaluation method for electrosurgical ablation by monopolar hot biopsy forceps for colonoscopy
Published in Medical devices (Auckland, N.Z.) (01-01-2018)“…This study evaluates tissue injury, which results from electrosurgical ablation, by correlating lesion depth to tissue impedance, and introduces a newly…”
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Subsurface Incorporation of Co Atoms into Si(100)
Published in Journal of physical chemistry. C (11-08-2011)“…The initial adsorption structures of Co on Si(100) were investigated using scanning tunneling microscopy (STM). Filled-state STM images showed bright…”
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Creation and annihilation of single atom vacancy during subsurface diffusion
Published in Physical review. B, Condensed matter and materials physics (09-11-2010)Get full text
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Detection of Looping During Colonoscopy Using Bending Sensors
Published in The open medical devices journal (24-01-2013)Get full text
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