两步水热法制备枝干状ZnO纳米结构的研究  

Study of two-stage hydrothermal growth of branched ZnO nanostructures

作　　者：周雄图[1] 林锑杭[1] 曾祥耀[1] 张永爱[1] 郭太良[1] 

机构地区：[1]福州大学物理与信息工程学院,福建福州350002

出　　处：《功能材料》2013年第21期3108-3112,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(61106053);福建省教育厅资助项目(JK2012001);福建省自然科学基金资助项目(2013J01236)

摘　　要：采用两步水热法,第1步利用Au作为催化剂生长ZnO纳米杆;第2步利用醋酸锌分解成ZnO纳米颗粒作籽晶层在ZnO纳米杆的侧壁生长ZnO纳米枝条,在Si片上成功制备了枝干状ZnO纳米结构。利用SEM、XRD分别表征枝干状ZnO纳米结构的形貌和晶体结构,研究籽晶层、反应液浓度、反应时间等参数对枝干状ZnO纳米结构形貌的影响。结果表明,Au作为催化剂生长的ZnO纳米杆具有沿(103)面择优取向生长的特性,而籽晶层对在侧壁生长ZnO纳米枝条至关重要。通过调节反应参数,可控制枝干状ZnO纳米结构的形貌,当反应液浓度越小,反应时间越长,纳米枝条越细、越长。所制备的枝干状ZnO纳米结构具有很好的生物兼容性,可作为细胞支架材料。Branched ZnO nanostructures with different morphologies have been synthesized successfully by intro- ducing a two-step hydrothermal process. First, ZnO nanorods were prepared on Si substrate using Au layer to assist the growth; second, ZnO nanowires were synthesized on the sidewall of first grown ZnO nanorods with thermal decomposed ZnO nanoparticulars as seed layer. SEM and XRD have been applied for the characteriza- tion of the morphology and microstructures of ZnO nanostructures. It was found that ZnO nanorods grown on Au/Si substrate showed a typical wurtzite structure with a （103） preferred orientation, and the seed layer was crucial for the growth of branched ZnO nanostructures. The diameter of second grown ZnO nanowires decreased with decreasing the content of solution~ and their lengths increased with the growth time. It was also proved that the branched ZnO nanostructures are biocompatible and can be used as cell scaffold.

关 键 词：水热生长 枝干状ZnO纳米结构 籽晶层 生物兼容性 

分 类 号：TB34[一般工业技术—材料科学与工程]