Abstract: A two-step anodization process was used to prepare highly-ordered porous anodic alumina（PAA）template.Titania nanowire arrays were prepared by the sol-gel/decompression method within the pores of anodic alumina template.The phenomenon of the sol filling into the template pores under different compressive stresses was particularly studied.It was showen that a certain decompression condition facilitated expulsion of the gas out of the PAA pores.Consequently，the degree of sol filling was very high and the prepared nanowires had good quality.Scanning electron microscopy（SEM）and X-ray diffraction（XRD）were used to characterize the morphology and phase structure of the template and nanowires.It was demonstrated by SEM that the nanowires were parallel to each other.The surface was smooth and there was no crack.The diameter of nanowires was about 50 nm.The center to center distance of nanowires were about 50 nm.The length and diameter of nanowires were consistent with the thickness and hole diameter of the PAA.So the growth of nanowires was dependent on the PAA template.It was demonstrated by XRD that the crystal constitution of the PAA was single θ-Al₂O₃ and the nanowire was anatase.

摘要： 采用二次阳极氧化工艺制备了高度规则排列的多孔氧化铝（PAA）模板，并利用模板法与溶胶-凝胶法结合的模板组装技术制备了氧化钛纳米线阵列，得到了直径在50 nm左右，线间距约为50 nm的纳米线阵列.研究了模板组装过程不同压力条件对溶胶向模板孔洞中填充度的影响，发现在一定的负压条件下，有利于PAA孔中气体的排出，得到高的溶胶填充度，进而制备出高质量的纳米线阵列.分别通过SEM及XRD技术表征了PAA模板及纳米线的形貌及相结构.SEM观察发现纳米线彼此平行，表面光洁，不存在龟裂，纳米线的长度和直径与所使用模板的厚度和直径一致，表明纳米线的生长受控于模板;XRD分析表明模板为单一的θ-Al₂O₃晶型，纳米线为锐钛矿型TiO₂.