Abstract
Nickel- (Ni) doped C60nanowhiskers (NWs) were synthesized by a liquid-liquid interfacial precipitation method using a C60-saturated toluene solution and isopropanol with Ni nitrate hexahydrate Ni(NO3)2·6H2O. By varying the heating temperature of Ni-doped C60NWs, two types of one-dimensional carbon nanostructures were produced. By heating the NWs at 973 and 1173 K, carbon nanocapsules (CNCs) that encapsulated Ni nanoparticles were produced. The Ni-encapsulated CNCs joined one dimensionally to form chain structures. Upon heating the NWs to 1373 K, cup-stacked-type carbon nanotubes were synthesized.
Highlights
Crystals of fullerene molecules have been synthesized by precipitation methods [1,2,3,4,5,6,7,8,9,10,11,12,13]
Metal-carbon nanocapsules (CNCs) structures were produced by the heating nickel- (Ni) doped C60 NWs which were synthesized by the liquid interfacial precipitation (LLIP) method
Thermogravimetric analyses (TGA) and differential thermal analyses (DTA) of the specimens were performed in a nitrogen flow
Summary
Crystals of fullerene molecules have been synthesized by precipitation methods [1,2,3,4,5,6,7,8,9,10,11,12,13]. By using a liquid-liquid interfacial precipitation (LLIP) method, Miyazawa et al have produced fullerene nanowhiskers (NWs) and nanotubes with high length-todiameter aspect ratios [14,15,16,17]. It is expected that the alloying of metals and CNCs can be performed using metal-doped fullerene NWs. In this study, metal-CNC structures were produced by the heating nickel- (Ni) doped C60 NWs which were synthesized by the LLIP method
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