고려대학교 · Engineering
Chong-Yun Kang 교수의 연구실은 고감도·고선택성 기반의 나노소재 기반 기름가스 센서 기술 개발에 주력하고 있습니다. 특히 이온 활성화 메커니즘, 표면 에지 결함, 금속 나노입자 도핑, 이종접합 및 생분해성 전자소재를 활용한 실온에서의 기체 감지 기술에 초점을 맞추고 있으며, 환경 모니터링과 의료 응용 분야에서의 실용화 가능성을 높이고자 합니다. 다양한 2차원 물질, 나노막대, 나노도메인 등 제형 제어 기반의 나노구조 설계를 통해 기술적 혁신을 이룹니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
The utilization of edge sites in two-dimensional materials including transition-metal dichalcogenides (TMDs) is an effective strategy to realize high-performance gas sensors because of their high catalytic activity. Herein, we demonstrate a facile strategy to synthesize the numerous edge sites of vertically aligned MoS<sub>2</sub> and larger surface area via SiO<sub>2</sub> nanorod (NRs) platforms for highly sensitive NO<sub>2</sub> gas sensor. The SiO<sub>2</sub> NRs encapsulated by MoS<sub>2</
The use of heterojunctions based on Rh-decorated WO3 nanorods is an effective strategy for achieving high-performance gas sensors for volatile organic compounds (VOCs), especially acetone (CH3COCH3). Herein, we successfully fabricated Rh-decorated WO3 nanorods with one-dimensional (1D) structures by glancing angle deposition (GLAD). Interestingly, morphological changes characterized by anomalous surfaces with numerous regions of negative curvature were observed upon decoration of the bare WO3 na
Au-decorated WO3 cross-linked nanodomes are fabricated using soft templates composed of highly ordered polystyrene beads and self-agglomeration of Au. The distribution and size of Au nanoparticles on the surface of WO3 cross-linked nanodomes are controlled by varying the thickness of the initial Au film. The responses of Au-decorated WO3 cross-linked nanodomes to various gases such as NO2, CH3COCH3, C2H5OH, NH3, CO, H2, and C6H6 are at least 5 times higher than those of bare WO3 cross-linked nan
Abstract A novel transient electronics technology that is capable of completely dissolving or decomposing in certain conditions after a period of operation offers unprecedented opportunities for medical implants, environmental sensors, and other applications. Here, we describe a biodegradable, flexible silicon-based electronic system that detects NO species with a record-breaking sensitivity of 136 Rs (5 ppm, NO 2 ) and 100-fold selectivity for NO species over other substances with a fast respon
The development of high performance gas sensors that operate at room temperature has attracted considerable attention. Unfortunately, the conventional mechanism of chemiresistive sensors is restricted at room temperature by insufficient reaction energy with target molecules. Herein, novel strategy for room temperature gas sensors is reported using an ionic-activated sensing mechanism. The investigation reveals that a hydroxide layer is developed by the applied voltages on the SnO<sub>2</sub> sur
Highly sensitive and selective chemiresistive sensors based on graphene functionalized by metals and metal oxides have attracted considerable attention in the fields of environmental monitoring and medical assessment because of their ultrasensitive gas detecting performance and cost‐effective fabrication. However, their operation, in terms of detection limit and reliability, is limited in traditional applications because of ambient humidity. Here, the enhanced sensitivity and selectivity of sing
Optimization of the formulation and processability of 3D-printable ceramic polymer composites offers a solution to piezoelectric materials with high printability and piezoelectric responses. Our approach is based on both 3D-printable piezoelectric composite formulation and auxetic structural design. The optimal formulation exhibited strong interfacial adhesion, high dispersion stability, low viscosity, and a smooth surface, resulting in a high piezoelectricity. In addition, processing parameters
Flexible sensor with ALD-synthesized SnS<sub>2</sub> flakes achieve extremely high response to NO<sub>2</sub> at room temperature.
