Synthesis of Multiwalled Carbon Nanotubes - …

AB - We report a facile one-step approach which involves no flammable gas, no catalyst, and no in situ polymerization for the preparation of well-aligned carbon nanotube array. A polymer precursor is placed on top of an anodized aluminum oxide (AAO) membrane containing regular nanopore arrays, and slow heating under Ar flow allows the molten polymer to wet the template through adhesive force. The polymer spread into the nanopores of the template to form polymer nanotubes. Upon carbonization the resulting multi-walled carbon nanotubes duplicate the nanopores morphology precisely. The process is demonstrated for 230, 50, and 20nm pore membranes. The synthesized carbon nanotubes are characterized with scanning/transmission electron microscopies, Raman spectroscopy, and resistive measurements. Convenient functionalization of the nanotubes with this method is demonstrated through premixing CoPt nanoparticles in the polymer precursors.

Synthesis of multiwalled carbon nanotubes supported on …

Synthesis of multiwalled carbon nanotube based infrared radiation detector, ..

Synthesis of multiwalled carbon nanotubes supported …

, , , , and (2012)Synthesis of multiwalled carbon nanotube-based infrared radiation detector. Sensors and Actuators A: Physical, 187. pp. 73-78. ISSN 0924-4247

Synthesis of graphene-multiwalled carbon nanotubes …

Different morphologies (worm-like, straight and twisted) of multiwalled carbon nanotubes (MWCNT) are synthesized by carefully controlling the C2H2 flow rate. Unique mixed ferrite nanoparticles were synthesized and characterized as the appropriate catalyst for the growth of MWCNT. Scanning electron microscope and transmission electron microscope was extensively used to explore the morphological and structural properties. Electrical properties of MWCNT suggest semiconducting behavior. Infrared (IR) radiation detection is demonstrated using MWCNT and prototypes of room temperature and low temperature. IR radiation detectors have been made using different morphologies of MWCNT as the active sensor material.

T1 - Low-temperature synthesis of multiwalled carbon nanotubes by graphite antenna CVD in a hydrogen-free atmosphere
T1 - Synthesis of bamboo - Structured multiwalled carbon nanotubes by spray pyrolysis method, using a mixture of benzene and pyridine

Multiwall Carbon Nanotubes: Synthesis and Application

T1 - Synthesis and characterization of ferracarborane-chitosan and ferracarborane-multiwalled carbon nanotube redox mediator conjugates for bioanode applications

T1 - One-pot sol-gel synthesis of Ni/TiO2 catalysts for methane decomposition into COx free hydrogen and multiwalled carbon nanotubes

Issuu is a digital publishing ..

AB - Spray pyrolysis is one of the most widely used methods for carbon nanotube synthesis. This is mainly because of its scalability and the low cost of the carbon nanotubes produced. In our synthesis experiments, multiwalled carbon nanotubes (MWCNT) are formed by spraying a solution of ferrocene-liquid hydrocarbon into a quartz reactor, heated to a temperature of around 800°C, with the aid of Ar gas. The most suitable carbon sources are found to be benzene and its derivatives (toluene, xylene). In our current paper we report, how this simple method can be used, to produce MWCNTs with bamboo structure, as evidenced by TEM and HRTEM measurements. Bamboo-structured MWCNTs are obtained by adding pyridine to the ferrocene-benzene solution. We have studied the effect of pyridine concentration on the ratio and morphology of the bamboo MWCNTs in the obtained samples. Such bamboo-shaped nanotubes are known to contain nitrogen incorporated into their structure. The nitrogen doping has an important effect on the physical properties of carbon nanotubes. Potential applications of doped nanotubes include gas sensors, nanoscale emitters and nanoelectronic devices.

Synthesis and Characterization of Poly(Amidoamine) dendrimer –coated Multiwalled carbon nanotubes and their application in gene delivery systems.

Researche institute in Czech Republic focuses on nanotechnology

Rajender S. Varma was born in India (Ph.D., Delhi University, 1976). After postdoctoral research at Robert Robinson Laboratories, Liverpool, U.K., he was a faculty member of the Baylor College of Medicine and Sam Houston State University prior to joining the Sustainable Technology Division at the U.S. Environmental Protection Agency in 1999. He has over 40 years of research experience in management of multidisciplinary technical programs and is extensively involved in sustainable aspects of chemistry, which include development of environmentally benign synthetic methods using alternate energy input using microwaves, ultrasound, and mechanochemistry, etc., efficient technologies for greener remediation of contaminants, and environmental sciences. Lately, he has been focused on greener approaches to assembly of nanomaterials and sustainable applications of magnetically retrievable nanocatalysts in benign media. He is a member of the editorial advisory board of several international journals and has published over 430 scientific papers and been awarded 14 U.S. patents.