Monodisperse chemically modified graphene obtained by density gradient ultracentrifugal rate separation.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 20443567.
- Also identified by DOI 10.1021/nn1000386.
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Abstract
A simple density gradient ultracentrifuge separation method has been developed for sorting chemically modified graphene (CMG) by sheet size and surface chemistry in just a few minutes. By optimizing the parameters, including the density gradient and centrifugation time, CMG sheets with specific size ranges and optical properties can be targeted selectively. UV-vis absorbance and photoluminescence spectra revealed the properties of separated CMG samples are highly dependent on their sheet size and degree of oxidation. A possible mechanism for the separation is discussed.
Medical subject headings
- Centrifugation, Density Gradient
- Colloids
- Crystallization
- Graphite
- Nanostructures
- Nanotechnology