金纳米线阵列制备及其光谱特性  

Preparation and Optical Properties of Gold Nanowire Arrays

作　　者：姚会军[1] 莫丹[1] 段敬来[1] 陈艳峰[1] 张苓[1] 刘杰[1] 侯明东[1] 孙友梅[1] 

机构地区：[1]中国科学院近代物理研究所

出　　处：《物理化学学报》2008年第10期1922-1926,共5页Acta Physico-Chimica Sinica

基　　金：中国科学院“西部之光”联合学者项目;国家自然科学基金(10775161,10375079,10575125)资助

摘　　要：利用电化学沉积方法在重离子径迹模板中制备出直径从45nm到200nm,长径比达700的金纳米线阵列,利用扫描电子显微镜(SEM)和X射线衍射(XRD)对所制备金纳米线的形貌及晶体结构进行分析,结果表明,在1.5V(无参比电极)沉积电压下所制备出的直径为200nm金纳米线沿[100]晶向具有较好择优取向.利用紫外-可见光谱(UV-Vis)对镶嵌在透明模板中平行排列的金纳米线阵列光学特性进行研究,发现金纳米线直径为45nm时,其紫外可见光谱在539nm处有强烈吸收峰,随着金纳米线直径增加,吸收峰红移,当金纳米线直径达到200nm时,其吸收峰峰位移至700nm.结合金纳米颗粒相关表面等离子体共振吸收效应对实验结果进行了讨论.Gold nanowires with diameters （d） between 45 nm and 200 nm and with length/diameter ratio of 700 were prepared in ion-track templates with electrodeposition method. The morphology and crystal structure of the gold nanowires were studied by scanning electron microscopy （SEM） and X-ray diffraction （XRD）. The 200 nm （d） gold nanowires preferred orientation along the [100] direction were formed at the deposition voltage of 1.5 V （without reference electrode）. The optical properties of gold nanowire arrays embedded in ion-track templates were studied by UV-Vis spectrophotometer. There was a strong absorption peak at 539 nm for 45 nm （d） gold nanowire arrays. With the diameter of gold nanowires increasing, the absorption peak shifted to the longer wavelength. At last, the result was discussed combined with surface plasmon resonance of gold nanoparticles.

关 键 词：金纳米线 紫外可见光谱 等离子体共振 重离子径迹模板 

分 类 号：TB383.1[一般工业技术—材料科学与工程]