Title of article :
Plasma synthesis of hexagonal-pyramidal graphite hillocks
Author/Authors :
Glad، نويسنده , , X. and de Poucques، نويسنده , , L. and Jaszczak، نويسنده , , J.A. and Belmahi، نويسنده , , M. and Ghanbaja، نويسنده , , J. and Bougdira، نويسنده , , J.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2014
Pages :
11
From page :
330
To page :
340
Abstract :
We report on the synthesis and natural occurrence of hexagonal-pyramidal graphite hillocks on graphite crystal substrates. Synthetic hillocks were obtained from flexible graphite sheets and highly oriented pyrolytic graphite via argon plasma etching in a standard helicon configuration reactor. High-resolution transmission electron microscopy and electron diffraction suggest these hillocks have a high degree of perfection. Their size distribution ranges from 50 to 800 nm across and up to 1 μm along the c-axis. As a reference, natural crystals from Tanzania exhibiting the same morphology are presented. Also, a formation mechanism of the plasma-synthesized structures by an etching process is detailed. This new type of vertically aligned carbon nano- and microstructures presents a peculiar geometry including nano-arches at the graphite edge planes which induce a strong resistance to the plasma etching.
Journal title :
Carbon
Serial Year :
2014
Journal title :
Carbon
Record number :
1928032
Link To Document :
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