Fractionation of graphene oxides by size-selective adhesion with spherical particles

Sinwoo Kim, Jonghwi Lee, Sang-Soo Lee

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Preparation of graphene has suffered from poor controllability of its lateral dimensions and the lack of sufficient fractionation technologies-the main barriers to its large-scale commercialization. This situation requires the development of an effective size fractionation strategy. Herein, the size-selective adsorption of graphene oxide (GO) onto positively charged spheres was developed as a novel size fractionation method. A critical lateral size of GO existed, above which physical adsorption was not stable, possibly because of the mechanical deformation involved. This scalable fractionation process easily produces well-dispersed GO sheets of relatively large lateral sizes, apart from the relatively small-sized GO sheets that are stably anchored onto the spherical particles. Moreover, this process is energy efficient and does not require any special equipment. This fractionation principle, size-selective adsorption, can be generalized to other various 2D nanomaterials. [Figure not available: see fulltext.]

Original languageEnglish
Pages (from-to)1098-1104
Number of pages7
JournalMacromolecular Research
Issue number12
Publication statusPublished - 2016 Dec 1


  • electrostatic interaction
  • fractionation
  • graphene oxide
  • large-area grapheme
  • sphere-plate adhesion

ASJC Scopus subject areas

  • General Chemical Engineering
  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry


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