A5027221481- 2D Materials and Applications
- MXene and MAX Phase Materials
- Ferroelectric and Negative Capacitance Devices
- Perovskite Materials and Applications
- Advanced Photocatalysis Techniques
- Electrocatalysts for Energy Conversion
- Graphene research and applications
- Advanced Sensor and Energy Harvesting Materials
- Chemical and Physical Properties in Aqueous Solutions
- Advanced battery technologies research
- Ga2O3 and related materials
- Asian Culture and Media Studies
- Gas Sensing Nanomaterials and Sensors
- Advanced Materials and Mechanics
- Electronic and Structural Properties of Oxides
- Catalysis and Hydrodesulfurization Studies
- ZnO doping and properties
- Nanomaterials for catalytic reactions
- Fuel Cells and Related Materials
- Ionic liquids properties and applications
- Phase Equilibria and Thermodynamics
- Advanced Memory and Neural Computing
Sungkyunkwan University
2021-2025
University of Pennsylvania
2023-2025
Hongik University
2022
Multi-valued logic gates are demonstrated on solution-processed molybdenum disulfide (MoS2) thin films. A simple chemical doping process is added to the conventional transistor fabrication procedure locally increase work function of MoS2 by decreasing sulfur vacancies. The resulting device exhibits pseudo-heterojunctions comprising as-processed and chemically treated (c-MoS2). energy-band misalignment c-MoS2 results in a sequential activation channel areas under gate voltage sweep, which...
The significance of metal-semiconductor interfaces and their impact on electronic device performance have gained increasing attention, with a particular focus investigating the contact metal. However, another avenue exploration involves substituting metal at interface field-effect transistors semiconducting layers to introduce additional functionalities devices. Here, scalable approach for fabricating metal-oxide-semiconductor (channel)-semiconductor (interfacial layer) is proposed by...
Ferroelectric field-effect transistors (FeFET) with two-dimensional (2D) semiconductor channels are promising low-power, embedded nonvolatile memory (NVM) candidates for next-generation in-memory computing. However, the performance of FeFETs can be limited by a charge imbalance between ferroelectric layer and channel and, low-dimensional semiconductors, also high contact resistance metal electrodes channel. Here, we report significant enhancement in contact-engineered 2D MoS2 Al0.68Sc0.32N...
Abstract Ferroelectric two dimensional (2D) materials hold great potential to develop modern miniaturized electronic and memory devices. 2D ferroelectrics exhibiting spontaneous polarization in the out‐of‐plane direction have been extensively investigated date, but loss of their during device operation has problematic. Although with in‐plane ferroelectric behavior are more stable against depolarization thus promising for logic applications, experimental realization devices is still scarce....
Graphene has exceptional optoelectronic and photonic capabilities for diverse applications in solar cells, ultrafast lasers, touch screens, photodetectors. Here, we report a graphene photodetector synthesized directly on silicon oxide/silicon (SiO2/Si) substrates using the metal-organic chemical vapor deposition technique. The as-grown flake-like 3-D increased surface area with numerous edge defects originating from flake edges. Additionally, light absorption heavily p-doped SiO2/Si...
Abstract Monolayer transition metal dichalcogenides (TMDs) have received considerable interest as a candidate material for ultrathin photodetectors, but their practical applications are hindered by difficulties in synthesizing high‐quality films over centimeter‐scale areas. Although chemical vapor deposition (CVD) based on liquid‐phase precursors has shown promise large‐area synthesis of TMDs, the resulting typically exhibit much lower optoelectronic performance due to lack wafer‐scale...
Three deep eutectic solvents (DESs), DES1–DES3, were prepared using levulinic acid and choline chloride with molar ratios of 3:1, 4:1, 5:1, respectively. Another three DESs, DES4–DES6, acetylcholine the same ratio. The density viscosity all six DESs experimentally measured at temperatures ranging from 293.2 to 323.2 K. Both logarithmic value follow a linear tendency respect temperature reciprocal temperature, liquid–liquid equilibria (LLE) for pseudobinary systems both toluene DES n-heptane...
Nanostructuring of Pt nanocatalysts increases the surface‐to‐volume ratio, thus enabling efficient usage for hydrogen evolution reaction (HER). Direct electrochemical reduction on electrode can produce nanostructured catalysts, which has been time‐consuming conventional colloidal synthesis. However, carbon‐based growth templates commonly used to create nanoparticles offer limited control over morphologies and HER performance. Herein, a facile synthesis nanoflowers (NFs) with well‐defined...
Two-dimensional (2D) semiconductors are promising for next-generation electronics that lightweight, flexible, and stretchable. Achieving stretchability with suppressed crack formation, however, is still difficult without introducing lithographically etched micropatterns, which significantly reduces active device areas. Herein, we report a solution-based hierarchical structuring to create stretchable semiconducting films continuous over wafer-scale areas via self-assembly of two-dimensional...
Abstract Multivalued transistors are demonstrated on wafer‐scale, sputtered gallium‐doped indium‐zinc‐tin‐oxide (Ga‐doped IZTO) thin films by area‐selective optical doping. Cation elemental doping and ultraviolet (UV) exposure representative techniques to control the carrier concentrations of metal oxide semiconductors. In this work, both exploited design a pseudo‐heterojunction monolithic Ga‐doped IZTO film generate multivalued electrical characteristics. The resulting semiconductor channel...
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하이퍼로컬 미디어는 생활세계에 맞닿아 있다. 기존 미디어가 온전히 비추지 못한 일상생활을 조명하면서 '로컬 그 자체'에 집중한다. 이 연구는 미디어의 전형인 〈월간 옥이네〉가 생활세계 재생산에 어떻게 관여하는지 파악하는 것을 목적으로 한다. 이를 위해 옥이네〉를 매개로 한 미디어 실천 참여자를 심층인터뷰했다. 하버마스가 재생산의 구조적 요소로 제시한 문화, 사회, 인성을 준거틀로 삼았다. 분석 결과, 옥이네〉는 기록, 내러티브, 미시적 접근 등의 방식으로 관여했다. 문화적 차원에서 사라져가는 기억을 기록해 의사소통을 위한 비축지식을 생산했다. 사회적 차원에서는 삶을 내러티브 담아내고, 타인에 대한 이해를 바탕으로 관계를 맺게 하고 행위를 조정했다. 인성적 평범한 사람들에게 발화할 수 있는 경험을 제공하고, 지역에 새로운 지식을 재생산해 생활세계의 지평을 넓혔다. 외면당했던 관점에서 바라보면 온전한 가치가 드러난다. '지방소멸' 담론으로부터 지역공동체의 안전지대를 구축하며,...
Two-dimensional (2D) transition metal dichalcogenides (TMDCs) have shown promise as a class of optoelectronic material for flexible photosynaptic devices. However, widespread use 2D TMDCs has been limited because producing high-quality, large-scale films on substrates still challenging. Herein, we propose facile solution processing strategy to realize arrays devices based TMDCs. Bulk molybdenum disulfide (MoS2) crystals were first electrochemically exfoliated into few-layer nanosheets using...
Platinum Nanocatalysts In article number 2200043, Joohoon Kang and co-workers demonstrate precisely controllable nanostructuring of platinum on various solution-processed 2D nanomaterials in large scale. This approach allows mass production nanoflowers, which can maximize catalytic properties operation stability.