Raman spectroscopy with graphenated anodized aluminum oxide substrates.
We measured the Raman scattering of graphene deposited nanohole arrays. As the sample was azimuthally rotated, periodicities of 7.5 degrees and 5 degrees were revealed for the 2700 cm(-1) and 1600 cm(-1) Raman lines of graphene, respectively. This is contrary to the scattered laser line azimuthal symmetry of 30 degrees for the hole array alone. When a reference dye (stilbene) was deposited on the graphenated platforms, its Raman peak shifted as a function of incident (tilt) angle; this was contrary to the unshifted 1600 cm(-1) peak of graphene itself. The data suggest strong coupling between the molecular vibrations as portrayed by Raman spectra and surface plasmon polariton waves propagating along the graphene surface.
Banerjee
Amrita
A
Electronic Imaging Center at NJIT and ECE Department, NJIT, Newark. NJ 07102, USA.
Li
Rui-Qiong
RQ
Grebel
Haim
H
D000537:Aluminum Oxide / Q000737:chemistry*; D004574:Electromagnetic Fields; D006108:Graphite / Q000737:chemistry*; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology / Q000379:methods*; D013059:Spectrum Analysis, Raman / Q000379:methods*; D013267:Stilbenes / Q000737:chemistry; D020349:Surface Plasmon Resonance; D013499:Surface Properties; D014732:Vibration
D013267:Stilbenes; D006108:Graphite; D000537:Aluminum Oxide