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Diamond Nucleation (diamond + nucleation)

Distribution by Scientific Domains
Polymers and Materials Science100%

Selected Abstracts

Diamond Nucleation by Carbon Transport from Buried Nanodiamond TiO2 Sol-Gel Composites

ADVANCED MATERIALS, Issue 6 2009
Michaël Daenen
Diamond nucleation and growth can occur by diffusion of carbon from buried ultradispersed diamond seeds on a silicon substrate through a titanium oxide interlayer. This knowledge can improve nucleation and adhesion of thin diamond films on various substrates. [source]

Surface Science Contribution to the BEN Control on Si(100) and 3C-SiC(100): Towards Ultrathin Nanocrystalline Diamond Films,

CHEMICAL VAPOR DEPOSITION, Issue 7-8 2008
Jean-Charles Arnault
Abstract Deposition of thin and smooth nanocrystalline diamond films requires a high degree of control of the nucleation stage. The nature of the interface between diamond film and substrate is also important for some applications. The successive steps of the bias-enhanced nucleation (BEN) process are studied in-situ on Si(100) and 3C-SiC(100) using electron spectroscopies. Thin nanodiamond films (80,900,nm) have been achieved on Si(100). The formation of a thin covering SiC layer (2,3,nm) during the plasma exposure for parameters stabilization (PEPS) step leads us to study the plasma/surface interactions on 3C-SiC(100) surfaces. The C-terminated 3C-SiC(100) demonstrates a large inertia under microwave plasma (MP)CVD conditions. An enhancement of diamond nucleation on this surface is observed. Moreover, surface analysis reveals very little damage after BEN on 3C-SiC surfaces. [source]

Nanodiamond Tipped and Coated Conical Carbon Tubular Structures,

CHEMICAL VAPOR DEPOSITION, Issue 7-8 2008
Boris Chernomordik
Abstract Studies of diamond nucleation and growth on conical carbon tubular structures show that the nucleation preferentially occurs at the tips, but only occurs on the sidewalls when they are pretreated with diamond or other powder dispersions, forming a nanodiamond coating. The high-resolution transmission electron microscopy (HRTEM) studies reveal that the diamond nucleation on the sidewalls may proceed through the formation of diamond nuclei within the walls at subsurface damage sites caused during pretreatment. In the case of experiments with low atomic hydrogen conditions, carbon onion structures are observed on the sidewalls but only with pretreatments. [source]