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Investigation of cell proliferative activity on the surface of the nanocomposite material produced by laser radiation

机译:激光辐射产生的纳米复合材料表面细胞增殖活性的研究

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A new method for the formation of composite nanomaterials based on multi-walled and single-walled carbon nanotubes (CNT) on a silicon substrate has been developed. Formation is carried out by ultrasound coating of a silicon substrate by homogenous dispersion of CNTs in the albumin matrix and further irradiation with the continuous laser beam with a wavelength of 810 nm and power of 5.5 watts. The high electrical conductivity of CNTs provides its structuring under the influence of the laser radiation electric field. The result is a scaffold that provides high mechanical strength of nanocomposite material (250 MPa). For in vitro studies of materials biocompatibility a method of cell growth microscopic analysis was developed. Human embryonic fibroblasts (EPP) were used as biological cells. Investigation of the interaction between nanocomposite material and cells was carried out by optical and atomic force microscopy depending on the time of cells incubation. The study showed that after 3 hours incubation EPP were fixed on the substrate surface, avoiding the surface of the composite material. However, after 24 hours of incubation EPP fix on the sample surface and then begin to grow and divide. After 72 hours of incubation, the cells completely fill the sample surface of nanocomposite material. Thus, a nanocomposite material based on CNTs in albumin matrix does not inhibit cell growth on its surface, and favours their growth. The nanocomposite material can be used for creating soft tissue implants.
机译:已经开发出基于多壁和单壁碳纳米管(CNT)在硅衬底上形成复合纳米材料的新方法。通过在白蛋白基质中的CNT均匀分散并进一步照射具有810nm的连续激光束和5.5瓦的功率的进一步照射,通过硅衬底的超声涂层进行。 CNT的高电导率在激光辐射电场的影响下提供了结构化。结果是提供高机械强度的纳米复合材料(250MPa)的支架。对于材料的体外研究生物相容性,开发了一种细胞生长微观分析方法。人胚胎成纤维细胞(EPP)用作生物细胞。通过光学和原子力显微镜对纳米复合材料和细胞之间的相互作用的研究取决于细胞孵育的时间。该研究表明,在3小时孵育EPP在基板表面上固定,避免复合材料的表面。但是,在24小时孵育EPP固定在样品表面后,然后开始生长和分裂。孵育72小时后,细胞完全填充纳米复合材料的样品表面。因此,基于白蛋白基质中CNT的纳米复合材料不抑制其表面上的细胞生长,并利用它们的生长。纳米复合材料可用于产生软组织植入物。

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