Highly wrinkled cross-linked graphene oxide membranes for biological and charge-storage applications

Lena A.L. Tang, Wong Cheng Lee, Hui Shi, Ethel Y.L. Wong, Anton Sadovoy, Sergey Gorelik, Jonathan Hobley, Chwee Teck Lim, Kian Ping Loh

Research output: Contribution to journalArticlepeer-review

Abstract

Inspired by the amphiphilicity of graphene oxide (GO), the surface of water is used as a template for the assembly of a GO film. Methacrylate- functionalized GO sheets can be cross-linked instantaneously at the water-air interface to form a highly wrinkled membrane spreading over an extended area. The multiple covalent linkages amongst the GO sheets enhances the in-plane stiffness of the film compared to noncovalently bonded GO films. The highly convoluted GO membrane can be used in two applications: the promoting of spontaneous stem-cell differentiation towards bone cell lineage without any chemical inducers, and for supercapacitor electrodes. Due to reduced van der Waals restacking, capacitance values up to 211 F g -1 can be obtained. The scalable and inexpensive nature of this assembly route enables the engineering of membranes for applications in regenerative medicine and energy-storage devices where secondary structures like nanotopography and porosity are important performance enhancers.

Original languageEnglish
Pages (from-to)423-431
Number of pages9
JournalSmall
Volume8
Issue number3
DOIs
Publication statusPublished - 2012 Feb 6

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Engineering (miscellaneous)

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