Biological Properties of Carbon Powders Synthesized Using Chemical Vapour Deposition and Detonation Methods

Abstract

Carbon powders can be synthesized using variety of CVD and detonation methods. Several interesting properties of carbon powder particles make them a very attractive material examined in many laboratories all over the world. However there is a lack of information discussing investigation of carbon powders directed to its application in pharmaceutical-cosmetic industry and medicine. Earlier investigation results proved that diamond powders present properties fighting free radicals. Presented work discusses the influence of carbon powder particles manufactured using MW/RF PACVD, RF PACVD and detonation methods onto hydro-lipid skin coat. Before the biological examinations physicochemical properties of carbon powders were determined. Grain size, shape and chemical composition of carbon powders were determined using the scanning electron microscopy. Surface functional groups were characterized by IR Fourier-transform spectroscopy and X-ray photoelectron spectroscopy. Structure and phase composition were investigated by means of the Raman spectroscopy. Results of allergy tests performed on laboratory mice proved that carbon powder particles synthesized using different methods do not cause allergy. In the following stage, the group of 20 patients applied the formula including carbon powder on their face skin. The influence of carbon powder onto hydro-lipid skin coat was determined by measurement of such parameters as: pH reaction, skin temperature, lipid fotometry and level of hydration. Additionally, macro pictures of places where the cream had been applied were registered. As the result of the investigation it was found that powders synthesized using various methods present different physicochemical properties which may individually affect the face skin parameters. The noticeable improvement of hydro-lipid skin coat kilter was observed.

Studies on the cytotoxicity of diamond nanoparticles against human cancer cells and lymphocytes

“…The results obtained via Raman spectroscopy of the tested diamond powders are consistent with other literature reports and show that the method used for purification and oxidation is able to remove the adsorbed contaminations as well as uncover the nanocrystalline structure of sp 3 carbon (diamond structure). This is manifested by an asymmetric broadening of peak D, appearing as an arm at the wavenumber of 1260 cm À1 [6,30]. Thermogravimetric analysis of the unmodified nanodiamonds ND-1 and hydroxylated nanodiamonds ND-4 is shown in Fig.…”

Carbon Nanomaterials for Targeted Cancer Therapy Drugs: A Critical Review

“…Nanodiamond (ND) particles evince great potential due to their shape and small size (from 4 to 10 nm in diameter), large surface area as well as the content ratio of the carbon sp 2 /sp 3 hybridized bonds . NDs possess a great potential for biomedical applications, including their use in anticancer therapy.…”

The Influence of Plasma-Assisted Production and Milling Processes of DLC Flakes on Their Size, Composition and Chemical Structure

“…Carbon powders, especially DLC flakes, are a very interesting material for numerous applications. We can find them, amongst other things, as an element of composites [15], material for biomedical applications [16,19,20], or in light-emitting diodes [21]. On the one hand, their use as a polymer matrix filler can improve the mechanical and tribological properties of composites.…”