Publication detail

On the Suitability of Raman Spectroscopy to Monitor the Degree of Graphene Functionalization by Diazonium Salts

SAMPATHKUMAR, K. DIEZ-CABANES, V. KOVAŘÍČEK, P. DEL CORRO, E. BOUŠA, M. HOSEK, J. KALBÁČ, M. FRANK O.

Original Title

On the Suitability of Raman Spectroscopy to Monitor the Degree of Graphene Functionalization by Diazonium Salts

Type

journal article in Web of Science

Language

English

Original Abstract

Raman spectroscopy is undoubtedly the most frequently used technique for universal characterization of graphene and related materials. Quantification of parameters like disorder or strain is possible through analysis of particular Raman bands. However, under certain conditions, such evaluation can be jeopardized by – sometimes hidden – convolution of more overlapping effects. In this work graphene functionalization by the common nitrobenzene diazonium salt under simultaneous biaxial tensile deformation induced by substrate swelling was investigated by Raman spectroscopy. As expected, the disorder-related D band appeared in the spectra documenting the covalent attack on the graphene lattice. However, the strain-induced shift of the graphene bands exposed additional peaks, masked at exactly the same positions as the unstrained graphene bands. The new bands were assigned to vibrations of the diazonium molecule and its decomposition products adsorbed on top of the functionalized graphene. The external strain thus provided means for more correct quantification of the lattice disorder.

Keywords

ELECTRON-TRANSFER CHEMISTRY; COVALENT FUNCTIONALIZATION; CHEMICAL-MODIFICATION; STRESS TRANSFER; REACTIVITY; SINGLE; SUBSTITUENT; BILAYER; CARBON

Authors

SAMPATHKUMAR, K.; DIEZ-CABANES, V.; KOVAŘÍČEK, P.; DEL CORRO, E.; BOUŠA, M.; HOSEK, J.; KALBÁČ, M.; FRANK; O.

Released

12. 9. 2019

Publisher

American Chemical Society

Location

WASHINGTON, DC 20036 USA

ISBN

1932-7447

Periodical

Journal of Physical Chemistry C (print)

Year of study

123

Number

36

State

United States of America

Pages from

22397

Pages to

22402

Pages count

6

URL

https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.9b06516

BibTex

@article{BUT158059,
  author="SAMPATHKUMAR, K. and DIEZ-CABANES, V. and KOVAŘÍČEK, P. and DEL CORRO, E. and BOUŠA, M. and HOSEK, J. and KALBÁČ, M. and FRANK and O.",
  title="On the Suitability of Raman Spectroscopy to Monitor the Degree of Graphene Functionalization by Diazonium Salts",
  journal="Journal of Physical Chemistry C (print)",
  year="2019",
  volume="123",
  number="36",
  pages="22397--22402",
  doi="10.1021/acs.jpcc.9b06516",
  issn="1932-7447",
  url="https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.9b06516"
}