Cost-effective synthesis of single walled carbon nanotube (SWCNT) and single walled carbon nanohorn (SWCNH) hybrids, in a single step, by electric arc discharge technique in open air, at lower current densities is reported. The rate of production of the hybrids is 3-5 g/h. The presence of SWCNTs and SWCNHs is confirmed by a transmission electron microscope (TEM). In addition to conventional larger Dahlia-like aggregates of nanohorns, unique nearly-spherical shaped and relatively smaller sized aggregates (mean size ∼ 25 nm) of nanohorns are formed along with thin bundles (mean diameter ∼ 5.7 nm) of SWCNTs. © 2015 Elsevier B.V. All rights reserved.

Haridoss Prathap

Department of Metallurgical and Materials Engineering

A. Joseph Berkmans

M. Jagannatham

Aggregates

carbon

Carbon nanotubes

Cost effectiveness

ELECTRIC ARCS

NANOHORNS

Transmission electron microscopy

Yarn

ARC DISCHARGE

ARC-DISCHARGE TECHNIQUE

CARBON NANOHORN

ELECTRIC ARC DISCHARGE TECHNIQUE

Hybrid

SINGLE WALLED CARBON NANOHORNS

Singlewalled carbon nanotube (SWCNT)

THIN BUNDLE

Single-walled carbon nanotubes (SWCN)

IIT Madras is a public technical and research university located in Chennai, Tamil Nadu. Founded in 1959, it is recognised as an Institute of National Importance.

IIT Madras has been ranked as the top engineering institute in India for four years in a row by the National Institutional Ranking Framework of the MHRD

It currently offers undergraduate, postgraduate and research degrees across 16 disciplines in Engineering, Sciences, Humanities and Management. About 596 faculty belonging to science and engineering departments and centres of the Institute are engaged in teaching, research and industrial consultancy.

IIT Madras

Diamond and Related Materials

Commercial purity aluminum was reinforced with different percentages of carbon nanohorns (CNH) using ball milling (1 h) followed by spark plasma sintering (SPS) at 550 °C for 5 min under 50 MPa pressure with heating rate 100 °C/min. The microstructure, hardness and compression properties of the spark-plasma-sintered carbon-nanohorns-reinforced aluminum (Al-CNH) composites were evaluated. Transmission electron microscopy revealed a uniform distribution of 0.3% CNH in Al, but above 0.3% CNH, agglomeration occurred. The compression strength of Al-0.3%CNH composites increased by 44% compared to the milled Al sample without CNH. © 2020, ASM International.

Journal of Materials Engineering and Performance

Microstructure and Mechanical Properties of Carbon Nanohorns Reinforced Aluminum Composites Prepared by Ball Milling and Spark Plasma Sintering

Alignment of multi-walled carbon nanotubes (MWCNTs) is demonstrated using physical forces both during synthesis, as well as post-synthesis through the arc discharge technique. The arc discharge process results in relatively straight and defect free MWCNTs compared to other techniques such as chemical vapor deposition. A scraper enables alignment of these straight MWCNTs during synthesis. Additional tailoring of the direction of alignment is seen to be possible even at room temperature, using physical forces in the form of scratch marks on the soot. Using a hand operated roller, on the surface of the soot, also results in the alignment of MWCNTs along the rolling direction. Alignment of MWCNTs is confirmed using scanning electron microscopy and it results in distinct changes in X-ray diffraction and energy dispersive spectroscopy data. These results are significant from the perspective of obtaining aligned MWCNTs, in large quantities, in a relatively inexpensive manner. © 2012 Elsevier Ltd. All rights reserved.

Carbon

Aligning carbon nanotubes, synthesized using the arc discharge technique, during and after synthesis

ACS Nano

High-Power Supercapacitor Electrodes from Single-Walled Carbon Nanohorn/Nanotube Composite

Highly Efficient Field Emission from Carbon Nanotube−Nanohorn Hybrids Prepared by Chemical Vapor Deposition

Synthesis of single-wall carbon nanohorns by arc-discharge in air and their formation mechanism

The Journal of Physical Chemistry C

Large-Scale Production of Single-Wall Carbon Nanohorns with High Purity

Synthesis of thin bundled single walled carbon nanotubes and nanohorn hybrids by arc discharge technique in open air atmosphere

Journal	Data powered by TypesetDiamond and Related Materials
Publisher	Data powered by TypesetElsevier Ltd
ISSN	09259635
Open Access	No