Record number :
1000587
Title of article :
Variation in surface fractal of graphite due to the adsorption of polyoxyethylene sorbitan monooleate
Author/Authors :
Hou Qing-Feng، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Pages :
7
From page :
244
To page :
250
Abstract :
The fractal analysis is carried out to study the influence of adsorption of polyoxyethylene sorbitan monooleate (Tween 80) on the surface properties of graphite. The surface fractal dimension (dSF), BET surface area (SBET) and pore size distribution (PSD) are calculated from low temperature nitrogen adsorption isotherms. The decline in the dSF of graphite surface is found as the adsorption amount of Tween 80 increases, which suggests that the adsorbed Tween 80 smoothes the graphite surface. Additionally, the observation of atomic force microscopy (AFM) proves that the original slit pores in pure graphite are blocked up and the step defect sites are screened by Tween 80, which may result in the reduction of graphite roughness. The PSD pattern of graphite changes after the adsorption due to the pore blocking effect. SBET of the graphite decreases as the adsorption amount of Tween 80 increases, which is attributed to both pore blocking effect and surface screening effect.
Keywords :
Fractal dimension of surface , Graphite , Tween 80 , adsorption
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science
Serial Year :
2005
Link To Document :
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