通过聚乙烯亚胺包覆的氧化铝模板实现金纳米棒阵列的可控生长。
Controlled Growth of Gold Nanorod Arrays from Polyethylenimine-coated Alumina Templates.
作者信息
Moon Jeong-Mi, Wei Alexander
机构信息
Department of Chemistry, Purdue University, West Lafayette, IN 47907-1393.
出版信息
Mater Res Soc Symp Proc. 2005;900E:O.12.32.1-O.12.32.7. doi: 10.1557/proc-0900-o12-32.
Au nanorod arrays were grown by electrodeposition in Au-backed nanoporous alumina templates modified with polyethylenimine (PEI) as an adhesion layer. By varying the concentration and molecular weight of PEI, the length of nanorod arrays could be finely controlled. The local length distribution was extremely narrow with relative standard deviations on the order of 2% for rod lengths from 700 nm to 17 microns. The uniform growth rate appears to be determined by the adsorbed PEI matrix, which controls the growth kinetics of the grains comprising the nanorods. Templates coated with poly(acrylic acid) did not impart fine control in nanorod growth. The nanorods could also be thermally annealed within the template and released as monodisperse particles of uniform size.
金纳米棒阵列是通过电沉积在以聚乙烯亚胺（PEI）作为粘附层进行修饰的金背衬纳米多孔氧化铝模板中生长而成的。通过改变PEI的浓度和分子量，可以精确控制纳米棒阵列的长度。对于长度从700纳米到17微米的纳米棒，其局部长度分布极其狭窄，相对标准偏差约为2%。均匀的生长速率似乎由吸附的PEI基质决定，该基质控制着构成纳米棒的晶粒的生长动力学。涂有聚丙烯酸的模板在纳米棒生长中无法实现精确控制。纳米棒也可以在模板内进行热退火，并作为尺寸均匀的单分散颗粒释放出来。
Zotero 插件