Argon and oxygen plasma treatment increases hydrophilicity and reduces adhesion of silicon-incorporated diamond-like coatings
Argon and oxygen plasma treatment increases hydrophilicity and reduces adhesion of silicon-incorporated diamond-like coatings
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DOI：
10.1116/6.0000356
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发表时间：
2020-07-01
期刊：
影响因子：
2.1
通讯作者：
Narayan, Roger J.
中科院分区：
文献类型：
--
作者：
Movahed, Saeid;Nguyen, Alexander K.;Narayan, Roger J.
在这项研究中，研究了熔融石英基底上掺硅类金刚石碳 (Si-DLC) 涂层的结构、粘附力和细胞活力特性。还研究了氩气和氧气后处理等离子体处理对 Si-DLC 涂层的影响。接触角结果表明Si-DLC涂层比未涂层的表面更亲水，后处理等离子处理增加了Si-DLC涂层的亲水性。原子力显微镜和轮廓测定法证实后处理等离子体处理增加了 Si-DLC 涂层的厚度和粗糙度。微划痕测试的结果表明，等离子处理降低了涂层的附着力。 X 射线光电子能谱 (XPS) 显示等离子处理前后 Si-DLC 涂层中存在碳、氧和硅。这些结果表明，后处理等离子体处理显着降低了 Si-DLC 涂层中碳的原子百分比。 XPS 还证实 Si-DLC 涂层中存在 sp(3)(C-C)、sp(2)(C=C)、C-O 和 C=O 键形式的碳；结果表明，后处理处理显着增加了 Si-DLC 涂层中的氧百分比。傅里叶变换红外光谱 (FTIR) 分析显示了与 Si-DLC 涂层中的 C-OH 拉伸、C-H 弯曲以及 Si-CH(2) 和 C-H 弯曲相关的特征。 XPS 和 FTIR 结果证实等离子体处理导致 sp(2) 和 sp(3) 键解离并形成 C-OH 键。接触角数据表明后处理增加了Si-DLC涂层的亲水性。与未涂覆的基质类似，在 Si-DLC 涂层上培养时，L929 细胞的细胞活力没有变化。这些研究结果表明 Si-DLC 涂层适合作为医疗和生物技术应用的惰性涂层。
In this study, the structure, adhesion, and cell viability characteristics of silicon-incorporated diamond-like carbon (Si-DLC) coatings on fused silica substrates were investigated. The effects of argon and oxygen postprocessing plasma treatments on the Si-DLC coatings were also studied. The contact angle results showed that the Si-DLC coatings were more hydrophilic than the uncoated surfaces, and postprocessing plasma treatment increased the hydrophilicity of the Si-DLC coatings. Atomic force microscopy and profilometry confirmed that postprocessing plasma treatment increased the thickness and roughness of the Si-DLC coatings. The results of microscratch testing indicated that the plasma treatments reduced the adhesion of the coatings. The x-ray photoelectron spectroscopy (XPS) showed the presence of carbon, oxygen, and silicon in the Si-DLC coatings before and after the plasma treatments. These results show that the postprocessing plasma treatment significantly reduced the atomic percentage of the carbon in the Si-DLC coatings. XPS also confirmed the presence of carbon in the form of sp(3)(C-C), sp(2)(C=C), C-O, and C=O bonds in the Si-DLC coatings; it showed that postprocessing treatments significantly increased the percentage of oxygen in the Si-DLC coatings. Fourier transform infrared spectroscopy (FTIR) analysis showed features associated with C-OH stretching, C-H bending, as well as Si-CH(2)and C-H bending in the Si-DLC coating. The XPS and FTIR results confirmed that the plasma treatment caused dissociation of the sp(2)and sp(3)bonds and formation of C-OH bonds. The contact angle data indicated that postprocessing treatment increased the hydrophilicity of the Si-DLC coating. Similar to the uncoated substrates, L929 cells showed no change in cell viability when cultured on Si-DLC coatings. These results of the study indicate the suitability of Si-DLC coatings as inert coatings for medical and biotechnology applications.