The optical visibility of graphene: interference colors of ultrathin graphite on SiO(2).
Monatomic layers of graphite are emerging as building blocks for novel optoelectronic devices. Experimental studies on a single graphite layer (graphene) are today possible since very thin graphite can be identified on a dielectric substrate using a normal optical microscope. We investigate the mechanism behind the strong visibility of graphite, and we discuss the importance of substrates and of the microscope objective used for the imaging.
Roddaro
S
S
NEST CNR-INFM & Scuola Normale Superiore, Piazza dei Cavalieri 7, I-56126 Pisa, Italy. s.roddaro@sns.it
Pingue
P
P
Piazza
V
V
Pellegrini
V
V
Beltram
F
F
D003124:Colorimetry / Q000379:methods*; D006108:Graphite / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing / Q000379:methods*; D008853:Microscopy / Q000379:methods*; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods; D010316:Particle Size; D012031:Refractometry / Q000379:methods*; D012822:Silicon Dioxide / Q000737:chemistry; D013499:Surface Properties
D046911:Macromolecular Substances; D012822:Silicon Dioxide; D006108:Graphite