Choi, Yunkyu Kim, Sung-Soo Kim, Ji Hoon Kang, Junhyeok Choi, Eunji Choi, Seung Eun Kim, Jeong Pil Kwon, Ohchan Kim, Dae Woo 2024-01-19T16:33:10Z 2024-01-19T16:33:10Z 2021-09-02 2020-09-22 1936-0851 https://pubs.kist.re.kr/handle/201004/118103 The preparation of carbon materials based hydrogels and their viscoelastic properties are essential for their broad application and scale-up. However, existing studies are mainly focused on graphene derivatives and carbon nanotubes, and the behavior of graphene nanoribbon (GNR), a narrow strip of graphene, remains elusive. Herein, we demonstrate the concentration-driven gelation of oxidized GNR (graphene oxide nanoribbon, GONR) in aqueous solvents. Exfoliated individual GONRs sequentially assemble into strings (similar to 1 mg/mL), (similar to 20 nanoplates mg/mL), and a macroporous scaffold (50 mg/mL) with increasing concentration. The GONR hydrogels exhibit viscoelastic shear-thinning behavior and can be shear-coated to form large-area GONR films on substrates. The entangled and stacked structure of the GONR film contributed to outstanding nanofiltration performance under high pressure, cross-flow, and long-term filtration, while the precise molecular separation with 100% rejection rate was maintained for sub-nanometer molecules. English AMER CHEMICAL SOC Graphene Oxide Nanoribbon Hydrogel: Viscoelastic Behavior and Use as a Molecular Separation Membrane Article 10.1021/acsnano.0c05902 1 ACS NANO, v.14, no.9, pp.12195 - 12202 ACS NANO 14 9 12195 12202 scie scopus 000615915300025 2-s2.0-85091588795 Chemistry, Multidisciplinary Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Science & Technology - Other Topics Materials Science Article graphene nanoribbon hydrogel scaffold nanofiltration membrane coating