title: Elemental and Microscopic Analysis of Naturally Occurring C-O-Si Hetero-Fullerene-Like Structures.
abstract: Carbon exhibits an ability to form a wide range of structures in nature. Under favorable conditions, carbon condenses to form hollow, spheroid fullerenes in an inert atmosphere. Using high resolution FESEM, we have concealed the existence of giant hetero-fullerene like structures in the natural form. Clear, distinct features of connected hexagons and pentagons were observed. Energy dispersive X-ray analysis depth-profile of natural fullerene structures indicates that Russian-doll-like configurations composed of C, 0, and Si rings exist in nature. The analysis is based on an outstanding molecular feature found in the size fraction of aerosols having diameters 150 nm to 1.0 µm. The fullerene like structures, which are ~ 150 nm in diameter, are observed in large numbers. To the best of our knowledge, this is the first direct detailed observation of natural fullerene-like structures. This article reports inadvertent observation of naturally occurring hetero-fullerene-like structures in the Arctic.
authors.forename: Nilima V
authors.initials: NV
authors.lastname: Hullavarad
authors.forename: Shiva S
authors.initials: SS
authors.lastname: Hullavarad
authors.forename: Javier
authors.initials: J
authors.lastname: Fochesatto
mesh_terms: D004560:Electricity; D037741:Fullerenes / Q000737:chemistry*; D008853:Microscopy; D010100:Oxygen / Q000737:chemistry*; D012825:Silicon / Q000737:chemistry*
chemical_list: D037741:Fullerenes; D010100:Oxygen; D012825:Silicon