Preparation of Aspect Ratio-Controlled Carbon Nanotubes

Don Young Kim; Hyoung Joon Jin

doi:10.4028/www.scientific.net/AMR.47-50.1101

Paper Titles

Influence of Annealing on the Magnetic Properties of Fe₅₀Co₅₀ Films
p.1084

A New Method for Temperature Measurement by the Nanometer Particles
p.1088

Characterization of Iron Doped Titanium Nitride Thin Films Prepared by Magnetron Sputtering
p.1093

Toxicology Studies of a Superparamagnetic Iron Oxide Nanoparticle In Vivo
p.1097

Preparation of Aspect Ratio-Controlled Carbon Nanotubes
p.1101

Fabrication of Organic Silk Fibroin/Multiwalled Carbon Nanotube Composite Cryogels by Freeze-Drying Method
p.1105

Multiwalled Carbon Nanotubes-Incorporated Polyurethane Nanocomposites
p.1109

Nanosize Copper Dispersed Ionic Liquids as an Electrolyte of New Dye-Sensitized Solar Cells
p.1113

Sensing of Ethanol with Nanosize FeZnO Thin Films
p.1117

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 47-50Preparation of Aspect Ratio-Controlled Carbon...

Preparation of Aspect Ratio-Controlled Carbon Nanotubes

Abstract:

Commercially, multi-walled carbon nanotubes (MWCNTs) production methods are based on the use of transition metal catalysts such as chemical vapor deposition (CVD). Raw MWCNTs usually contain metal catalysts and other carbon impurities. A common route to eliminate these impurities is an acid treatment. In addition, this route induces cutting of MWCNTs which can control the aspect ratio of MWCNTs. The aspect ratio controlled MWCNTs can use many applications such as the electrode material, biological imaging and sensing, etc. In this study, the aspect ratio of MWCNTs was controlled using an acid treatment with a 3:1 concentrated H2SO4/HNO3 mixture by varying the treatment time. Results show that an acid treatment can control the aspect ratio of MWCNTs. The aspect ratio controlled MWCNTs were observed by TEM and Raman spectra.