Monodisperse Chemically Modified Graphene Obtained by Density Gradient Ultracentrifugal Rate Separation
ACS Nano2010Vol. 4(6), pp. 3381–3389
Citations Over TimeTop 10% of 2010 papers
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.
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