Fabrication, characterization, and application in SERS of self-assembled polyelectrolyte-gold nanorod multilayered films
Fabrication, characterization, and application in SERS of self-assembled polyelectrolyte-gold nanorod multilayered films
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DOI：
10.1021/jp052706r
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发表时间：
2005-10-20
影响因子：
3.3
通讯作者：
Dong, SJ
中科院分区：
文献类型：
--
作者：
Hu, XG;Cheng, WL;Dong, SJ
已经证明了一种有效且简便的制备金纳米棒（Au NR）多层纳米结构的方法。选择线性聚乙烯亚胺（LPEI）作为聚合物粘合层，并使用阴离子聚电解质聚（苯乙烯磺酸钠）（PSS）作为多层纳米结构中带正电的Au NRs的连接体。使用逐层组装技术通过静电相互作用将它们交替沉积在 LPEI 改性的氧化铟锡 (ITO) 基板上。 Au NR 多层纳米结构的等离子体特性可通过受控自组装过程进行调节。使用FE-SEM研究了所得到的带有Au NRs单层膜和带有Au NRs多层膜的基底的形貌。更重要的是，我们发现多层NRs薄膜可以用作表面增强拉曼光谱（SERS）基底来探测4-氨基苯硫酚（4-ATP）。
An effective and facile approach for the preparation of multilayered nanostructure of gold nanorods (Au NRs) has been demonstrated. Linear polyethylenimine (LPEI) was selected as a polymeric adhesive layer, and an anionic polyelectrolyte poly(sodium styrenesulfonate) (PSS) was used as the linker of the positively charged Au NRs in multilayered nanostructure. They were deposited onto the LPEI-modified indium-doped tin oxide (ITO) substrate alternately using the layer-by-layer assembly technique via electrostatic interactions. The plasmonic property of the multilayered nanostructure of Au NRs is tunable by the controlled self-assembly process. FE-SEM was used to study the morphologies of the resulted substrates with Au NRs monolayer membrane and with Au NRs multilayered membrane. More importantly, it was found that the multilayered NRs films could be used as a surface-enhanced Raman spectroscopy (SERS) substrate for probing 4-aminothiophenol (4-ATP).