| 학회 | 한국재료학회 |
| 학술대회 | 2013년 봄 (05/23 ~ 05/24, 여수 엠블호텔(THE MVL)) |
| 권호 | 19권 1호 |
| 발표분야 | B. 나노재료(Nanomaterials) |
| 제목 | Self-assembled Periodic Arrays of Reduced Graphene Oxide for Cell Growth and Alignment |
| 초록 | One-dimensional (1D) and two-dimensional (2D) carbon nanomaterials such as single-walled carbon nanotubes (SWNTs) and graphene have received great attention due to their remarkable electrical and physical properties. The demonstration of synthesizing these carbon nanomaterials has been progressed by chemical vapor deposition (CVD) process on metallic surfaces which is inexpensive and robust way to produce high quality of carbon nanotubes and sheets of graphene. In addition, besides of this technique, the exfoliation of graphite with strong oxidants has been explored to prepare a suspension of individual two-dimensional (2D) graphene oxide (GO) nanosheets dispersed in various types of solvents. Thus, this colloidal suspension of GO can readily be employed in a wide range of promising potential applications such as transparent electrodes, solar cells, optoelectronic devices and biological sensors. On this restricted research area, one major challenge is to assemble such individual nanosheets on defined areas of surfaces forming specific structures. Thus far, a variety of techniques such as Langmuir-Blodgett assembly, vacuum filtration, dip-coating, spraying, and spin- casting process have been developed to allow the formation of carbon nanostructures at the micro and nanoscale. Here, we describe a simple and facile one-step process to achieve patterned arrays of chemically reduced graphene oxide (rGO) on a substrate with precisely controllable manner over large areas. The spatial positioning of rGO on a certain surface still remains challenging since the originally synthesized GO nanosheet has high aspect ratio with different length scale i.e., single atomic scale in thickness and micrometer scale in lateral size. By confining a drop of rGO solution in a restricted geometry composed of a spherical lens and a flat substrate, two different types of self-organized rGO patterns e.g., concentric ring patterns and spoke-like strip patterns were fabricated on glass and SiO2/Si substrate through a combination process of coffee-ring effect and cyclic stick-slip motions by solvent evaporation. As a result, we successfully created hierarchically well-ordered structures of rGO and evaluated their biocompatibility and biofunctionality with L-929 fibroblastic cells and PC-12 neuronal cells, respectively. |
| 저자 | 홍석원 |
| 소속 | 부산대 |
| 키워드 | self-assembly; nanostructures; graphene oxide; L-929 cells; PC-12 cells |
