Choi, Hee Jae Ko, Myoungjae Kim, In Ho Yu, Hayoung Kim, Jin Yong Yun, Taeyeong Yang, Joon Seon Yang, Geon Gug Jeong, Hyeon Su Moon, Myeong Hee Kim, Sang Ouk 2024-01-19T12:00:24Z 2024-01-19T12:00:24Z 2022-07-14 2022-06 1936-0851 https://pubs.kist.re.kr/handle/201004/115104 Many interesting properties of 2D materials and their assembled structures are strongly dependent on the lateral size and size distribution of 2D materials. Accordingly, effective size separation of polydisperse 2D sheets is critical for desirable applications. Here, we introduce flow field-flow fractionation (FlFFF) for a wide-range size fractionation of graphene oxide (GO) up to 100 mu m. Two different separation mechanisms are identified for FlFFF, including normal mode and steric/ hyperlayer mode, to size fractionate wide size-distributed GOs while employing a crossflow field for either diffusion or size-controlled migration of GO. Obviously, the 2D GO sheet reveals size separation behavior distinctive from typical spherical particles arising from its innate planar geometry. We also investigate 2D sheet size-dependent mechanical and electrical properties of three different graphene fibers produced from size-fractionated GOs. This FlFFF-based size selection methodology can be used as a generic approach for effective wide-range size separation for 2D materials, including rGO, TMDs, and MXene. English American Chemical Society Wide-Range Size Fractionation of Graphene Oxide by Flow Field-Flow Fractionation Article 10.1021/acsnano.2c01402 1 ACS Nano, v.16, no.6, pp.9172 - 9182 ACS Nano 16 6 9172 9182 N scie scopus 000818757800001 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article PARTICLE SEPARATION SHEETS REDUCTION LIQUID FIBER NANOPARTICLES TEMPERATURE NANOSHEETS graphene oxide size fractionation flow field flow fractionation graphene fiber 2D materials