采用直流磁控溅射法分别在纳米晶体钛和粗晶粒工业纯钛表面沉积TiO2薄膜,研究了纳米钛基TiO2薄膜的结构形貌、形核、生长、晶体结构和体外生物活性.用扫描电镜和X射线衍射仪分析了薄膜的表面形貌和晶体结构,用体外模拟人体体液浸泡诱导羟基磷灰石生长实验表征薄膜的生物活性.结果表明:纳米钛基薄膜形核率高,薄膜非常致密、光滑,晶粒细小,仅为粗晶粒钛基TiO2薄膜晶粒尺寸的一半,约100nm;钛基材纳米晶体化可促进薄膜由锐钛矿相向金红石相转变;钛基材纳米化可显著提高自身及其表面TiO2薄膜的生物活性.
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