| ZHANG Xianming,CAI Dingsen,QIAN Shi.Preparation and Properties of Graphene Films on Medical Titanium by PECVD Method[J],53(8):156-162, 190 |
| Preparation and Properties of Graphene Films on Medical Titanium by PECVD Method |
| Received:July 16, 2023 Revised:December 10, 2023 |
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| DOI：10.16490/j.cnki.issn.1001-3660.2024.08.014 |
| KeyWord:plasma enhanced chemical vapor deposition medical titanium graphene films corrosion resistance cell compatibility |
| Author | Institution |
| ZHANG Xianming |
Cixi Center of Biomaterials Surface Engineering, Zhejiang Ningbo, , China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai , China |
| CAI Dingsen |
Cixi Center of Biomaterials Surface Engineering, Zhejiang Ningbo, , China |
| QIAN Shi |
Cixi Center of Biomaterials Surface Engineering, Zhejiang Ningbo, , China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai , China |
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| Abstract: |
| Graphene is a two-dimensional carbon nanomaterial consisting of a single layer of carbon atoms arranged in a hexagonal lattice. It has attracted extensive attention in many fields due to its unique chemical structure and excellent performance. Many researchers confirm that graphene-based nanomaterials have certain antibacterial and osteogenic properties. However, there is little study on in-situ preparation of graphene on medical titanium. In order to construct graphene films on medical titanium, plasma enhanced chemical vapor deposition (PECVD) method was used in this study. Methane, argon, and hydrogen were flowed into the reaction chamber as carbon source, carrier gas, and etching gas, respectively. The influences of growth time on the physical, chemical and biological properties of graphene films were studied. The growth time of graphene was set to be 5 min, 10 min, and 30 min. The structure, surface morphology, surface wettability, and corrosion resistance of graphene films were analyzed by Raman, scanning electron microscope, contact angle tester, and electrochemical workstation, respectively. The cytocompatibility of graphene films was evaluated by culturing mouse osteoblasts. Cell adhesion and spreading, cell proliferation, and cell morphology of mouse osteoblasts on the graphene films were systemically studied. The Raman results indicated that graphene films contained D, G, and 2D characteristic peaks. The graphene films with a growth time of 10 min and 30 min presented a vertical nano sheet state on the medical titanium surface. The water contact angle of graphene films with a growth time of 5 min, 10 min, and 30 min was 94.7°, 100.5°, and 122.7°, respectively. With the increasing of growth time, water contact angle of graphene films on the medical titanium surface increased gradually, which might be the influence of vertical nanosheet structure. Among the three graphene films groups, the sample with graphene growth time of 5 min had the minimum corrosion current density of 1.822×10‒7 A/cm2. The sample with graphene growth time of 10 min had the highest corrosion potential of ‒0.404 V. Graphene films improved corrosion resistance of titanium. Graphene films growing for 5 min and 10 min were beneficial to the cell adhesion and spreading. Graphene films growing for 30 min had an inhibitory effect to some extent on the cell adhesion and spreading, and viability of mouse osteoblasts, which attributed to surface morphology and hydrophobic properties. In short, graphene films are prepared with different morphology on medical titanium by adjusting the growth time in this study. Graphene films can effectively improve the corrosion resistance of medical titanium. The morphology of graphene films is affected by the growth time and then the water contact angle is changed. Graphene films with different growth time show obvious differences in the adhesion and spread of mouse of mouse osteoblasts. |
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