Polymerization of a Confined π‐System: Chemical Synthesis of Tetrahedral Amorphous Carbon Nanoballs from Graphitic Carbon Nanocapsules

Abstract

Aziridination of graphitic carbon nanocapsules (CNCs) followed by pyrolysis at 700 °C at ambient pressure yields tetrahedral amorphous carbon nanoballs (CNBs, see Figure). Because of the pyramidal character of some of the double bonds in the derivatized CNCs, a radical chain mechanism is proposed to rationalize the transformation of C sp2 hybridization in the CNCs to C sp3 hybridization in the CNBs.

Carbon Hollow Nanospheres from Chlorination of Ferrocene

“…11 CHNSs reported until now in the literature are either amorphous or graphitic, also being called carbon nanoshells. [12][13][14][15] This work is dedicated to the structural and chemical characterization of very peculiar carbon hollow nanospheres obtained by direct chlorination of ferrocene at relatively high temperature (900 °C).…”

“…Therefore, carbon hollow nanospheres (CHNSs) are very promising as catalyst supports, in the protection of unstable organic substances, and also in drug delivery − This work is dedicated to the structural and chemical characterization of very peculiar carbon hollow nanospheres obtained by direct chlorination of ferrocene at relatively high temperature (900 °C). …”

Treatment of Acute Thromboembolism in Mice Using Heparin-Conjugated Carbon Nanocapsules

“…Postsynthesis cutting of the CNTs must be performed to reduce the overall length of each tube and to reduce the aspect ratio. CNC production does not require this additional step, which results in higher production purity and more even size distributions. − Although well-studied for its electrical and mechanical properties, CNCs have not been well-established as a biomaterial. − Recently, we have shown that unmodified CNCs, compared to unmodified CNTs and C 60 , are highly biocompatible when injected intravenously …”

Electronic Structure Study of Nanostructured Transition Metal Oxides Using Soft X-Ray Spectroscopy

“…To name a few: the study of different N contents in ZnO:N thin films [59], Mg-induced increase of bandgap in Zn 1Àx Mg x O nanorods [60], synthesis of highly water-soluble magnetite colloidal nanosrystals [61], charge transfer in nanocrystalline-Au/ZnO nanorods [62], size dependence of the electronic structure of copper nanoclusters in SiC matrix [63], and electron correlation and charge transfer in [(Ba 0.9 Nd 0.1 )CuO 2 þ d ] 2 /[CaCuO 2 ] 2 superconducting superlattices [64], one-dimensional quantum confinement effects in a-Fe 2 O 3 ultrafine nanorod arrays [65] and polymerization of a confined p-system: chemical synthesis of tetrahedral amorphous carbon nanoballs from graphitic carbon nanocapsules [66]. …”