Exploration of Carbon Nanocapsules
Date Issued
2004
Date
2004
Author(s)
Chu, Cheng-Che
DOI
en-US
Abstract
Carbon nanocapsules (CNCs) were synthesized with pulse plasma arc discharge method by Dr. Hwang’s group in ITRI (Industrial Technology Research Institute). High quality CNCs were insoluble in any solvent. For further studying and application, it is crucial to make it soluble.
We successfully functionalized CNCs with azidobenzene which enabled aziridine-modified CNCs adducts to be soluble in common solvents like dichloromethane, chloroform, ether and hexane. CNCs adducts was immobilized on quartz platelet or silicon wafer through spin coating then underwent pyrolysis at temperature of 700 ℃. Carbon nanoballs formed on the surface and were detected by AFM and TEM.
Transformation from graphene layered structure into amorphous framework under nitrogen atmosphere at ambient pressure was observed. Increased content of carbon with sp3 hybridization was confirmed with a greatly enhanced peak at D-band in Raman spectroscopy. Aziridine bond cleavage induced by pyrolysis yielded a radical (or dipolar) intermediate which triggered a chain reaction to afford morphological change. The procedure developed provides a simple route covert sp2 graphene into sp3 amorphous carbon in mild conditions.
Subjects
奈米碳球
化學修飾
穿透式電子顯微鏡
原子力顯微鏡
疊氮
AFM
TEM
Carbon nanocapsule:aziridine:azide
chemica
Type
thesis
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