Abstract
A novel, cost-effective, easy and single-step process for the synthesis of large quantities of magnetic metal-encapsulated multi-walled carbon nanobeads (MWNB) and multi-walled carbon nanotubes (MWNT) using catalytic chemical vapour deposition of methane over Mischmetal-based AB3alloy hydride catalyst is presented. The growth mechanism of metal-encapsulated MWNB and MWNT has been discussed based on the catalytically controlled root-growth mode. These carbon nanostructures have been characterized using scanning electron microscopy (SEM), transmission electron microscopy (TEM and HRTEM), energy dispersive analysis of X-ray (EDAX) and thermogravimetric analysis (TGA). Magnetic properties of metal-filled nanobeads have been studied using PAR vibrating sample magnetometer up to a magnetic field of 10 kOe, and the results have been compared with those of metal-filled MWNT.
Highlights
Carbon nanotubes (CNTs) [1,2,3], including single-walled and multi-walled carbon nanotubes (SWNT and MWNT), have attracted tremendous interest both from fundamental and technological perspectives due to their unique physicalNanoscale Res Lett (2008) 3:76–81 magnetic nature would be a proper candidate for biological applications
In this paper we present a novel, cost-effective, easy and singlestep process for the synthesis of metal-encapsulated multiwalled carbon nanobeads (MWNB) in large quantity which have these defects present already
Magnetization measurements of metal-encapsulated multi-walled carbon nanobeads (MWNB) and MWNT were carried out using a PAR vibrating sample magnetometer at 30 °C up to a magnetic field of 10 kOe
Summary
Carbon nanotubes (CNTs) [1,2,3], including single-walled and multi-walled carbon nanotubes (SWNT and MWNT), have attracted tremendous interest both from fundamental and technological perspectives due to their unique physicalNanoscale Res Lett (2008) 3:76–81 magnetic nature would be a proper candidate for biological applications. Keywords Magnetic metal-filled multi-walled carbon nanobeads (MWNB) Á Alloy hydride catalyst Á Chemical vapour deposition Á Magnetization
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