Click chemistry on solution-dispersed graphene and monolayer CVD graphene

Zhong Jin, Thomas P. McNicholas, Chih Jen Shih, Qing Wang, Geraldine L C Paulus, Andrew J. Hilmer, Steven Shimizu, Michael S. Strano

Research output: Contribution to journalArticle

131 Citations (Scopus)

Abstract

Graphene from two different preparative routes was successfully functionalized with 4-propargyloxybenzenediazonium tetrafluoroborate in order to study a subsequent attachment by click chemistry (1,3-dipolar azide-alkyne cycloaddition) of a short chain polyethylene glycol with terminal carboxylic end group (PEG-COOH). The reaction steps were studied by FTIR and Raman spectroscopies, as well as zeta-potential and surface tension measurements. In the first route, pristine graphene was surfactant dispersed from a stage controlled expanded graphite before reaction, resulting in colloidally stable dispersions after dialysis removal of the surfactant following the two functionalization steps. The chemistry was shown to increase the zeta-potential from -45.3 to -54.6 mV and increase the surface tension from 48.5 to 63.0 mN/m compared to those of the precursor solution. The magnitudes of the zeta-potential and the resulting solution concentration were shown to increase with grafting density up to 14.2 μg/mL. A colloidal stability model was used to estimate the maximum grafting density of the PEG-COOH groups yielding a value of 1 per 10 nm2. Raman mapping before and after the two-step functionalization suggests that edges and defects are preferentially reacted. In the second route, we investigated the same click chemistry functionalization on chemical vapor deposition (CVD) synthesized monolayer graphene films, which showed higher reactivity than solution-dispersed graphene. Because these methods do not originate with the more oxidized forms of graphene, the results point to new ways of more precisely controlling the chemistry of graphene.

Original languageEnglish (US)
Pages (from-to)3362-3370
Number of pages9
JournalChemistry of Materials
Volume23
Issue number14
DOIs
StatePublished - Jul 26 2011
Externally publishedYes

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Graphite
Graphene
Chemical vapor deposition
Monolayers
Zeta potential
Polyethylene glycols
Surface tension
Surface-Active Agents
Surface active agents
Dialysis
Cycloaddition
Alkynes
Azides
Dispersions
Raman spectroscopy
Defects

Keywords

  • click chemistry
  • grapheme
  • surface functionalization

ASJC Scopus subject areas

  • Materials Chemistry
  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Jin, Z., McNicholas, T. P., Shih, C. J., Wang, Q., Paulus, G. L. C., Hilmer, A. J., ... Strano, M. S. (2011). Click chemistry on solution-dispersed graphene and monolayer CVD graphene. Chemistry of Materials, 23(14), 3362-3370. https://doi.org/10.1021/cm201131v

Click chemistry on solution-dispersed graphene and monolayer CVD graphene. / Jin, Zhong; McNicholas, Thomas P.; Shih, Chih Jen; Wang, Qing; Paulus, Geraldine L C; Hilmer, Andrew J.; Shimizu, Steven; Strano, Michael S.

In: Chemistry of Materials, Vol. 23, No. 14, 26.07.2011, p. 3362-3370.

Research output: Contribution to journalArticle

Jin, Z, McNicholas, TP, Shih, CJ, Wang, Q, Paulus, GLC, Hilmer, AJ, Shimizu, S & Strano, MS 2011, 'Click chemistry on solution-dispersed graphene and monolayer CVD graphene', Chemistry of Materials, vol. 23, no. 14, pp. 3362-3370. https://doi.org/10.1021/cm201131v
Jin Z, McNicholas TP, Shih CJ, Wang Q, Paulus GLC, Hilmer AJ et al. Click chemistry on solution-dispersed graphene and monolayer CVD graphene. Chemistry of Materials. 2011 Jul 26;23(14):3362-3370. https://doi.org/10.1021/cm201131v
Jin, Zhong ; McNicholas, Thomas P. ; Shih, Chih Jen ; Wang, Qing ; Paulus, Geraldine L C ; Hilmer, Andrew J. ; Shimizu, Steven ; Strano, Michael S. / Click chemistry on solution-dispersed graphene and monolayer CVD graphene. In: Chemistry of Materials. 2011 ; Vol. 23, No. 14. pp. 3362-3370.
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