Role of polymers in CVD growth of nanocrystalline diamond films on foreign substrates

Abstract

Spin coating of PVA polymer with fine grained diamond powder is used as the nucleation treatment for achieving growth of nanocrystalline diamond (NCD) thin films. The growth is realized by standard microwave plasma chemical vapor deposition (CVD). The morphology and character of deposited NCD film is strongly related to the growth temperature. The low temperature process (4308C) results in a growth of well-faceted continuous films. The high temperature process (830 8C) results in voids and openings in the layer. Addition of PVA as the interlayer between the substrate and the seeding polymer composite leads to more openings. The effect is the most pronounced at 830 8C. This is assigned to thermal instability of PVA and oxygen chemistry present in the early beginning of the CVD growth. An optimized seeding process based on the polymer composite procedure at low substrate temperature and low PVA amount allows the diamond growth on extremely soft substrates.

Diamond-coated three-dimensional GaN micromembranes: Effect of nucleation and deposition techniques

“…In our group, we have developed several procedures for nucleation of diamond films from polymer composites. In these cases, the composite polymer to the substrate was transferred by spin coating of a thin film or by covering the substrate by electrospun nanofibrous textile . In this study, we applied a polyvinyl alcohol (PVA) polymer mixed with fine grained diamond powder.…”

Diamond nucleation and seeding techniques for tissue regeneration

“…9.24(a) ). In addition, we observed that the diamond fi lm surface coverage decreased when a thick polymer fi lm was used as an interlayer (Kromka et al , 2009c). In this case, small openings sized at approximately 200 nm were observed.…”

“…(Muller et al , 1998;Daenen et al , 2009;Lu et al , 2012). Similarly, polymer-nanoparticle composites and polyelectrolytenanoparticle bi-layers have recently been developed (Kromka et al , 2009b(Kromka et al , , 2009cScorsone et al , 2009).…”

“…Transfer of the composite polymer to the substrate can be achieved for instance by spin-coating of a thin fi lm (Kromka et al , 2009b(Kromka et al , , 2009c or by electrospun nanofi brous textile (Potocký et al , 2013). A slightly different method using separated components is the sequential deposition of polymer, UDD particles and polymer .…”

Nanofibrous poly(lactide-co-glycolide) membranes loaded with diamond nanoparticles as promising substrates for bone tissue engineering

“…[38][39][40][41] In 1 mL of PLGA solution, 0.007 g of the ND powder was added and was homogeneously dispersed by mixing and sonication (Labsonic U-2000, B Braun Biotech, Goettingen, Germany, sonication time 5 seconds). The sonication was performed immediately before electrospinning in order to minimize clustering of diamond nanoparticles.…”