A5055496629- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Advanced Thermoelectric Materials and Devices
- Aluminum Alloys Composites Properties
- Metallurgy and Material Forming
- Microstructure and Mechanical Properties of Steels
- Advanced Sensor and Energy Harvesting Materials
- Aluminum Alloy Microstructure Properties
- Thermal Radiation and Cooling Technologies
- Graphene research and applications
- Advancements in Battery Materials
- Acute Myeloid Leukemia Research
- Metal and Thin Film Mechanics
- Advanced Battery Materials and Technologies
- Facial Nerve Paralysis Treatment and Research
- Hearing, Cochlea, Tinnitus, Genetics
- Vestibular and auditory disorders
- Ear Surgery and Otitis Media
- Neurotransmitter Receptor Influence on Behavior
- Thermal properties of materials
- Innovative Energy Harvesting Technologies
- Graphene and Nanomaterials Applications
- Metal Forming Simulation Techniques
- Advanced battery technologies research
- Nasal Surgery and Airway Studies
Korea Institute of Materials Science
2024
Korea Institute of Science and Technology
2018-2022
Seoul National University
2011-2022
Sungkyunkwan University
2005-2022
Yonsei University
2022
Samsung (South Korea)
2012-2022
Kyung Hee University
2016-2020
Seoul Institute
2018-2019
Government of the Republic of Korea
2018
Korea Institute of Industrial Technology
2016
Mechanistic investigations on the Cp*Rh(III)-catalyzed direct C-H amination reaction led us to reveal new utility of 1,4,2-dioxazol-5-one and its derivatives as highly efficient amino sources. Stepwise analysis C-N bond-forming process showed that competitive binding rhodium metal center amidating reagent or substrate is closely related efficiency. In this line, 1,4,2-dioxazol-5-ones were observed have a strong affinity cationic Rh(III) giving rise dramatically improved amidation efficiency...
Abstract Softening of thermoelectric generators facilitates conformal contact with arbitrary-shaped heat sources, which offers an opportunity to realize self-powered wearable applications. However, existing devices inevitably exhibit reduced conversion efficiency due the parasitic loss in high-thermal-impedance polymer substrates and poor thermal arising from rigid interconnects. Here, we propose compliant intrinsically stretchable interconnects soft conductors that achieve high performance...
Hummers method has been used for 50 years to prepare graphene oxide (GO) by oxidizing graphite using Mn2O7. In this work, a new angle on is described. The oxidation procedure before the addition of water, which respected as main step method, named I oxidation, and widely ignored further after water II oxidation. chemical structural evolutions during was demonstrated first time various techniques including atomic force microscopy (AFM), dynamic light scattering (DLS), X-ray photoelectron...
With the continuous development of flexible and wearable thermoelectric generators (TEGs), high-performance materials their integration into convenient devices have to be considered. Herein, we demonstrated highly aligned wet-spun carbon nanotube (CNT) fibers by optimizing liquid crystalline (LC) phase via hydrochloric acid purification. The facilitates better alignment CNTs during fiber extrusion, resulting in high power factor 2619 μW m–1 K–2, which surpasses those dry-spun CNT yarns. A...
Abstract Flexible thermoelectrics that enable conformal contact with heat sources of arbitrary shape are indispensable for self‐powered wearable electronics. Scalable integration flexible thermoelectric (TE) materials into functional devices has improved over the past few years, however, practical applications TE still hindered by low performance. Herein, highly aligned carbon‐nanotube yarns (CNTYs) proposed, combined selective doping via picoliter scale inkjet printing. Coagulation assisted...
Abstract Objectives/Hypothesis: The aim of this study was to investigate associations between tinnitus and stress factors including anxiety in elementary school students. Study Design: Cross‐sectional study. Methods: We conducted a cross‐sectional questionnaire survey 940 students aged from 10 12 years. Data on 928 were collected. comprised 96 questions that classified into six categories: subjects' symptoms, factors, State Anxiety (transitory emotional condition characterized by feeling...
Continuous efforts have been made to attain high performance Li‐S batteries by preventing loss of soluble polysulfides, whereas issues related insoluble discharge products, Li 2 S and S, underestimated. A facile mild method, diazotization, that enables uniform functionalization on the surface ordered mesoporous carbon (CMK‐3) with aniline functional groups while not deteriorating original CMK‐3 microstructure is demonstrated. The possess favorable interactions products. Thus, they...
With the increase in practical interest flexible thermoelectric (TE) generators, demand for high-performance alternatives to brittle TE materials is growing. Herein, we have demonstrated wet-spun CNT fibers with high performance by systematically controlling longitudinal carrier mobility without a significant change concentration. The optimized alignment increases electrical conductivity decreasing thermopower, thus improving power factor. On further adjusting charge carriers via mild...
A high-performance, wearable thermoelectric generator (TEG) was fabricated with a highly aligned carbon nanotube (CNT) sheet. The CNT sheet exhibits extraordinary electrical conductivity compared to disordered sheets and also can be directly as continuous TEG without metal electrode interconnects. This provides significant reduction in contact resistance between TE legs electrodes traditional TEGs, resulting higher power output. In addition, the continuity of module any disconnected parts...
We have rationally designed a bracelet-type thermoelectric generator based on carbon nanotube ink printed directly onto flexible cable.
As power-conversion devices, flexible thermoelectrics that enable conformal contact with heat sources of arbitrary shape are attractive. However, the low performance thermoelectric materials, which does not exceed those brittle inorganic counterparts, hampers their practical applications. Herein, we propose chalcogenide-nanostructured carbon nanotube (CNT) yarns outstanding power factor at a temperature using electrochemical deposition. The CNT exhibit factors 3425 and 2730 μW/(m·K2) 298 K...
As practical interest in stretchable electronics increases for future applications wearables, healthcare, and robotics, the demand electrical interconnects with high conductivity, durability, printability, adhesion is growing. Despite conductivity stretchability of most previous interconnects, they lack stable against strain to substrates, leading a limitation their applications. Herein, we propose conductive adhesive consisting silver particles carbon nanotube as an auxiliary filler...
Graphene oxide (GO) has been synthesized by the Hummers method with modification of experimental condition different research groups, but there is no guideline to prepare tailored GO for targeted applications. In this research, we suggest a tailor-fittable functionalization graphene on basis scope our previous report two-step oxidation GO. We describe detailed procedure synthesis GO, effects degree step I characteristics and comparing them II oxidation. Characteristic changes occurring...
Abstract Correlation between electrical, structural properties and electromagnetic shielding efficiency (EMI SE) of carbon nanotube sheets (CNTSs) was investigated. Solvent densification CNTSs led to enhancements (CNT) bundling behavior in the thickness direction while maintaining areal density CNTSs. These modifications resulted enhanced electrical reduced sheet by modifying microstructure characteristics. Remarkably, contrary conventional EMI materials, resistance which reflects CNTSs, is...
Long-term operation of wearable pressure sensors requires the use self-powered human-based energy sources.
A schwannoma of the larynx is a rare benign tumor that usually presents as submucosal mass in pyriform sinus and aryepiglottic space, this type constitutes diagnostic therapeutic challenge for otolaryngologists. We present here two cases supraglottic schwannomas were misdiagnosed laryngoceles. Both excised through lateral thyrotomy approach without tracheostomy, laryngeal function was successfully maintained. discuss clinical imaging findings management neoplasm with focusing on differential...
The aim of this study was to investigate the expression Hsp90β and GRP94, elucidate clinical significance their expression, in patients with resectable non-small-cell lung cancer (NSCLC).Surgical tissue specimens were obtained from 208 NSCLC who underwent surgical resection. levels GRP94 assessed microarrays immunohistochemistry. No correlations observed between or several clinicopathological factors. high-Hsp90β group [median overall survival (OS) 20.4 months; 95% confidence interval (CI)...
CA 15-3 is derived from proteolytic shedding of the extracellular domain mucin 1 (MUC1) glycoprotein. Luminal subtype breast cancer shows a higher expression in MUC1 genes, and positive relationship between estrogen receptor (ER) has been reported. In this study, we attempted to determine difference level according cancer.From January 2000 December 2009, total 707 patients who were diagnosed with metastatic or recurrent at Samsung Medical Center included study. Among these, 536 available...