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  • 02월 20일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제113회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Graphene Biosensors

2014년 2월 20일 12시 07분 43초
ANAL1-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 11시 : 35분
분석화학 - Advanced Bio and Environmental Analysis I: Sensor and Chip
저자 및
한국과학기술원(KAIST) 생명화학공학과, Korea
2D and 3D graphene nanomaterials have shown their unique optical, electrical and mechanical properties which could be ideally used for biosensors. In the first part, I will introduce the synthesis of monolayer graphene quantum dots (GQDs) and graphene oxide quantum dots (GOQDs) that have circular shape and diameter of less than 4 nm starting from graphite nanoparticles. The blue PL emitting GQD and the green PL emitting GOQD were demonstrated, and their optical properties were compared by means of PL, PL excitation, UV-vis absorbance, and time-resolved PL to understand the PL mechanism of the nano-sized graphene materials. Our proposed methodology allows the production of homogeneous and single-layered photoluminescent GQDs and GOQDs with high yield and high reproducibility, and the produced GOQDs were used for biosensing applications. Compared to 2D graphene structure such as graphene, graphene oxide (GO), 3D graphene structure has also attracted worldwide attention due to its enhanced specific surface area and high compression/aggregation resistance. Thus, the combination of the 3D structure and the intrinsic excellent properties of graphene synergistically functions, so a variety of applications of the 3D graphene including energy storage and catalyst supports seem promising. In this study, we have demonstrated the synthesis of 3D graphene microballs by using a microfluidic droplet generator. The GO solution was encapsulated in the droplets and underwent through the capillary compression to form the 3D structure. In addition, we could load metal ions or metal nanoparticles together with the GO solution, resulting in the nanoparticle-3D graphene hybrids, which could be used for the catalyst supporter and the polymer composites with core-shell structure.