Harvard University, Department of Chemistry and Chemical Biology, 12 Oxford Street, Cambridge, Massachusetts 02138, USA.
ACS Nano. 2009 Oct 27;3(10):3315-25. doi: 10.1021/nn901002q.
This paper describes a process for the fabrication and positioning of nanowires (of Au, Pd, and conjugated polymers) embedded in thin epoxy slabs. The procedure has four steps: (i) coembedding a thin film of metal or conducting polymer with a thin film of nickel metal (Ni) in epoxy; (ii) sectioning the embedded structures into nanowires with an ultramicrotome ("nanoskiving"); (iii) floating the epoxy sections on a pool of water; and (iv) positioning the sections with an external magnet to a desired location ("magnetic mooring"). As the water evaporates, capillary interactions cause the sections to adhere to the substrate. Both the Ni and epoxy can be etched to generate free-standing metallic nanowires. The average translational deviation in the positioning of two nanowires with respect to each other is 16 +/- 13 mum, and the average angular deviation is 3 +/- 2 degrees . Successive depositions of nanowires yield the following structures of interest for electronic and photonic applications: electrically continuous junctions of two Au nanowires, two Au nanowires spanned by a poly(3-hexylthiophene) (P3HT) nanowire; single-crystalline Au nanowires that cross; crossbar arrays of Au nanowires; crossbar arrays of Au and Pd nanowires; and a 50 x 50 array of poly(benzimidazobenzophenanthroline ladder) (BBL) nanowires. Single-crystalline Au nanowires can be placed on glass wool fibers or on microfabricated polymeric waveguides, with which the nanowire can be addressed optically.
本文描述了一种在薄环氧树脂板中嵌入纳米线（金、钯和共轭聚合物）的制造和定位方法。该方法包括四个步骤：（i）将金属或导电聚合物薄膜与薄镍金属（Ni）薄膜嵌入环氧树脂中；（ii）用超微切片机（“纳米切割”）将嵌入结构切成纳米线；（iii）将环氧树脂切片漂浮在水池上；（iv）用外部磁铁将切片定位到所需位置（“磁系泊”）。随着水的蒸发，毛细相互作用导致切片附着在基底上。Ni 和环氧树脂都可以被蚀刻以生成独立的金属纳米线。两个纳米线之间的定位平均平移偏差为 16 ± 13 µm，平均角度偏差为 3 ± 2 度。连续沉积纳米线可产生以下对电子和光子应用感兴趣的结构：两个 Au 纳米线的电连续连接、由聚（3-己基噻吩）（P3HT）纳米线跨越的两个 Au 纳米线、交叉的单晶 Au 纳米线、Au 纳米线的交叉棒阵列、Au 和 Pd 纳米线的交叉棒阵列以及聚（苯并咪唑并苯并二氮杂卓梯）（BBL）纳米线的 50 x 50 阵列。单晶 Au 纳米线可以放置在玻璃纤维或微加工聚合物波导上，通过它们可以对纳米线进行光学寻址。
