Witkowska Justyna, Tarnowski Michał, Choińska Emilia, Kulpa Marek, Szade Jacek, Raugh Gerhard, Święszkowski Wojciech, Wierzchoń Tadeusz
Faculty of Materials Science and Engineering, Warsaw University of Technology, 141 Wołoska St., 02-507 Warsaw, Poland.
A. Chełkowski Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland.
Materials (Basel). 2021 Aug 26;14(17):4842. doi: 10.3390/ma14174842.
Our previous work has shown that for cardiac applications, combining low-temperature plasma oxidation with an amorphous carbon coating (a-C:N:H type) constitutes a prospective solution. In this study, a short-term modification by low-temperature oxygen plasma is proposed as an example and a method for shaping the topography and surface energy of the outer amorphous carbon coating, produced via the Radio-Frequency Chemical Vapour Deposition (RFCVD) method on NiTi alloy oxidized under glow-discharge conditions. This treatment alters the chemical composition of the outer zone of the surface layer. A slight increase is also noted in the surface roughness at the nanoscale. The contact angles were shown to increase by about 20% for water and 30% for diiodomethane, while the surface free energy decreased by ca. 11%. The obtained results indicate that even short-term contact with low-temperature plasma can shape the surface properties of the carbon coating, an outcome which shows potential in terms of its use in medical applications.
我们之前的工作表明，对于心脏应用而言，将低温等离子体氧化与非晶碳涂层（a-C:N:H 型）相结合是一种有前景的解决方案。在本研究中，提出以低温氧等离子体进行短期改性为例，作为一种对通过射频化学气相沉积（RFCVD）法在辉光放电条件下氧化的 NiTi 合金上制备的外层非晶碳涂层的形貌和表面能进行塑形的方法。这种处理改变了表层外层区域的化学成分。在纳米尺度上还观察到表面粗糙度略有增加。结果表明，水的接触角增加了约 20%，二碘甲烷的接触角增加了 30%，而表面自由能降低了约 11%。所得结果表明，即使与低温等离子体进行短期接触也能塑造碳涂层的表面性能，这一结果在其医学应用方面显示出潜力。
