具有一维梯度直径的金属银纳米线的制备与结构表征

Since the conceptoffunctionally graded m aterials(FG M)is proposed1,2],m uch attention has been paid toFG M studies.Generally,FG M s were designed with thegradientdistribution ofcom position and structure,andthe graded structure of FG M is achieved by acom position gradient from one side of m aterials to theother,resulting in gradientproperties.Itis well鄄knownthat properties of nanom eter鄄sized m aterials stronglydepend on their sizes.Such size effect offers a newconcept for the design…

Preparation and Characterization of Ag Nanowires with Gradient Sizes

A new one-dimensional gradient material with graded sizes was prepared. A two-step anodic oxidation of high purity aluminum was used to fabricate porous alumina templates with graded pore sizes. Based on the templates, metal silver graded nanowires were obtained by electrochemical deposition. SEM and TEM results show that the resulted metal silver nanowires have obvious graded diameters with gradient ranging from about 12 to 31 nm along the nanowire direction, and are single-crystalline with a preferential growth along <100> direction.