UNIST · Materials Science
신현석 교수의 연구실은 그래핀 기반 나노소재의 합성 및 응용에 중점을 두고 있으며, 특히 그래핀 기반 투명 도막, 표면 증강 라만 스펙트로스코피(SERS) 및 리튬이on 이차전지용 복합 소재의 개발을 핵심 연구 방향으로 삼고 있습니다. 고정밀 두께 제어가 가능한 레이어-바이-레이어(LbL) 기반 그래핀 다층 구조, 금 나노입자와의 상호작용을 통한 광학적 특성 향상, 그리고 복합 산화바나듐 황화물과의 병합을 통한 고속 충·방전 성능 향상 기술이 주요 성과입니다. 이는 에너지 저장 및 나노광학 분야에서의 응용 가능성을 높이고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
A new approach for the fabrication of reduced graphene oxide (rGO) multilayers which can be used for transparent and conducting thin films was developed. This was achieved by using layer-by-layer (LbL) assembly of positively and negatively charged rGO sheets, which could provide highly controllable thin films in terms of thickness, transmittance, and sheet resistance. In particular, the thickness of the multilayer thin films of rGO was able to be controlled precisely in the subnanometre scale by
Surface-enhanced Raman scattering (SERS) of graphene on a SiO(2)(300 nm)/Si substrate was investigated by depositing Au nanoparticles using thermal evaporation. This provided a maximum enhancement of 120 times for single-layer graphene at 633 nm excitation. SERS spectra and scan images of single-layer and few-layer graphene were acquired. Single-layer graphene provides much larger SERS enhancement compared to few-layer graphene, while in single-layer graphene the enhancement of the G band was la
A graphene-attached VS<sub>4</sub> composite prepared by a simple hydrothermal method is studied in terms of its lithium reaction mechanism and high rate capability.
