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Spherical Carbon Nanostructures - A Versatile Material for Sensing and Energy Storage

Published online by Cambridge University Press:  01 February 2011

Bettina Friedel  and
Siegmund Greulich-Weber
Bettina Friedel
Affiliation:
[email protected], University of Paderborn, Physics, Warburger Strasse 100, Paderborn, 33098, Germany
Siegmund Greulich-Weber
Affiliation:
[email protected], University of Paderborn, Department of Physics, Warburger Strasse 100, 33098 Paderborn, Germany
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Abstract

Monodisperse smooth carbon nanospheres were synthesized via preparation and complex subsequent multistage pyrolysis of spherical melamine formaldehyde copolymer microparticles. The diameters of optained carbon spheres were located between several tens to several hundreds nanometers depending on the size of used initial copolymer particles. During the conversion of copolymer to carbon, the spheres pass strong shrinking of more than 80 % without any deformation. They meet the high quality standards of common prepared and used polymer and silica spheres and are therefore a promising material with great potential. Carbon nanoparticles could be used in a wide range of applications, such as for gas storage, fuel cells, sensing, catalyst support, separation and purification, supercapacitors or lithium-ion batteries, and photonic bandgap materials. Especially for the last mentioned usage monodispersity and a perfect spherical shape are very important. So-called synthetic opals from carbon spheres have been grown by sonic-supported sedimentation and a photonic bandgap in the infrared region has been found. Due to their high thermal resistance under non-oxidizing conditions carbon opals are also suitable as template for inverse opals. The structure of the spheres has been studied during different stages of carbonization by scanning electron microscopy, nuclear magnetic resonance and fourier transform infrared spectroscopy.

Keywords

carbonizationpolymercolloid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 951: Symposium E – Nanofunctional Materials, Nanostructures and Novel Devices for Biological and Chemical Detection , 2006 , 0951-E06-27
Copyright
Copyright © Materials Research Society 2007

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