纳米阵列阳极氧化铝模板的制备及其形成机理

Preparation and Formation Mechanism of Porous Anodic Aluminum Oxide Nano Array Template

多孔阵列阳极氧化铝模板为合成大面积的准一维纳米丝和纳米管微阵列提供了一种有效的载体。采用二次氧化法,制备了孔径在30～40nm之间的纳米阵列氧化铝模板,分析了纳米阵列阳极氧化铝模板形成的热力学原理、动力学原理及孔的形成机理。采用扫描电子显微镜(SEM)对其形貌进行了表征,通过扩孔试验得到了孔径与扩孔时间的关系。用XRD衍射仪对纳米薄膜的成分和形态进行了分析,证明了制备的氧化膜是非晶态的。

A porous alumina nano array template with pores of 30 ~ 40 nm in diameter was prepared using a two-step electrochemical anodizing process.The thermodynamic and kinetic principles and the self-assetnbly mechanism of the porous alumina coating were ana-lyzed.The surface morphology of the template was observed using a scanning electron microscope(SEM).The relationship between the diameter of the pores and time of pore-enlargement treatment was explored by making use of pore-enlargement treatment.Mo-reover,the composition and crystal structure of the coating was analyzed by means of X-ray diffraction.Results indicate that the alumina coating has amorphous structure.