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Graphene oxide (GO) is not only a uniqe class of two-dimensional materials but also an important precursor for scalable preparation of graphene. The efficient size fractionation of graphene oxide is of great importance to the fundamental and applied studies of chemically modified graphene, however, remains a great challenge. Herein we report an efficient and scalable fractionation method of GO employing reversible adsorption/desorption of temperatue-responsive poly(N-isopropylacrylamide) on GO to amplify their mass difference and significantly improve the fractionation efficiency. Furthermore, size-dependent sodium ion storage of the resulting fractionated reduced GO is revealed for the first time with high sodium-storage performance achieved for the smallest reduced GO due to its largest d-spacing and most defect sites. This work provides valuable insights to the size fractionation and size-dependent electrochemical performance of graphene, which can be potentially extended to other two-dimensional materials.
This article was published in the following journal.
Name: ACS applied materials & interfaces
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Strongly cationic polymer that binds to certain proteins; used as a marker in immunology, to precipitate and purify enzymes and lipids. Synonyms: aziridine polymer; Epamine; Epomine; ethylenimine polymer; Montrek; PEI; Polymin(e).
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A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.
A potent mutagen and carcinogen. It is a reduction product of 4-NITROQUINOLINE-1-OXIDE. It binds with nucleic acids and inactivates both bacteria and bacteriophage.
A potent mutagen and carcinogen. This compound and its metabolite 4-HYDROXYAMINOQUINOLINE-1-OXIDE bind to nucleic acids. It inactivates bacteria but not bacteriophage.
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