Enhancement of the Infrared Absorption by Biomolecules Adsorbed on Single Wall Carbon Nanotubes

Довбешко, Г. И.; Фесенко, О.Н.; Gnatyuk, Olena; Yakovkin, Konstantin; Шуба, М. В.; Maksimenko, S. A.

doi:10.1142/9789814343909_0069

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Earlier, we have registered enhancement in Raman and IR spectra of different biomolecules adsorbed on carbon nanostructures: single-wall carbon nanotubes (SWCNTs) and graphene nanoflakes [ 5 - 7 ]. The maximum enhancement factor for Raman scattering of such nucleobases as thymine and adenine adsorbed on SWCNT was 10.…”

Section: Introductionmentioning

confidence: 99%

Coherent anti-Stokes Raman scattering enhancement of thymine adsorbed on graphene oxide

et al. 2014

View full text Add to dashboard Cite

Coherent anti-Stokes Raman scattering (CARS) of carbon nanostructures, namely, highly oriented pyrolytic graphite, graphene nanoplatelets, graphene oxide, and multiwall carbon nanotubes as well CARS spectra of thymine (Thy) molecules adsorbed on graphene oxide were studied. The spectra of the samples were compared with spontaneous Raman scattering (RS) spectra. The CARS spectra of Thy adsorbed on graphene oxide are characterized by shifts of the main bands in comparison with RS. The CARS spectra of the initial nanocarbons are definitely different: for all investigated materials, there is a redistribution of D- and G-mode intensities, significant shift of their frequencies (more than 20 cm-1), and appearance of new modes about 1,400 and 1,500 cm-1. The D band in CARS spectra is less changed than the G band; there is an absence of 2D-mode at 2,600 cm-1 for graphene and appearance of intensive modes of the second order between 2,400 and 3,000 cm-1. Multiphonon processes in graphene under many photon excitations seem to be responsible for the features of the CARS spectra. We found an enhancement of the CARS signal from thymine adsorbed on graphene oxide with maximum enhancement factor about 105. The probable mechanism of CARS enhancement is discussed.

show abstract

Section: Introductionmentioning

confidence: 99%