Polymer mediated layer-by-layer assembly of different shaped gold nanoparticles.
Polymer mediated layer-by-layer assembly of different shaped gold nanoparticles.
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DOI：
10.1016/j.jcis.2016.10.022
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发表时间：
2017-02-01
影响因子：
9.9
通讯作者：
Reed SM
中科院分区：
文献类型：
--
作者：
Budy SM;Hamilton DJ;Cai Y;Knowles MK;Reed SM
金纳米粒子具有广泛的性质，在电子学、光学、催化和传感等领域具有潜在的应用前景。为了证明可以为这些应用创建致密、稳定和便携的样品，通过逐层（LBL）技术经由滴铸在玻璃基底上组装多层GNP。两种阳离子聚电解质，聚（二烯丙基二甲基氯化铵）和聚乙烯亚胺，一种阴离子聚电解质，聚（4-苯乙烯磺酸钠），和一种中性聚合物，聚乙烯吡咯烷酮，与四种不同形状的GNP（球形，棒状，三棱柱，八面体）相结合，制备薄膜。这些聚合物纳米颗粒组合的子集被组装成薄膜。通过动态光散射、紫外-可见光谱和透射电子显微镜对合成的GNP进行表征，并且使用紫外-可见光谱和原子力显微镜对LBL薄膜进行表征。通过监测GNP的局部表面等离子体共振来测试纳米颗粒在溶液和薄膜中的传感应用。LBL薄膜的制备范围从25到100层，在等离子体激元的光密度从0.5到3.0。溶液中的灵敏度范围为14至1002 nm/RIU，膜的灵敏度范围为18.8至135.1 nm/RIU，表明膜内GNP的接近减少。聚合物介导的不同形状金纳米颗粒的逐层组装
Gold nanoparticles (GNPs) have a wide range of properties with potential applications in electronics, optics, catalysis, and sensing. In order to demonstrate that dense, stable, and portable samples could be created for these applications, multiple layers of GNPs were assembled via drop casting on glass substrates by layer-by-layer (LBL) techniques. Two cationic polyelectrolytes, poly(diallyldimethylammonium chloride) and polyethyleneimine, one anionic polyelectrolyte, poly(sodium 4-styrene sulfonate), and one neutral polymer, polyvinylpyrrolidone, were combined with four different shapes of GNPs (spherical, rod, triangular prismatic, and octahedral) to prepare thin films. A subset of these polymer nanoparticle combinations were assembled into thin films. Synthesized GNPs were characterized via dynamic light scattering, UV-vis spectroscopy, and transmission electron microscopy and the LBL thin films were characterized using UV-vis spectroscopy and atomic force microscopy. Sensing applications of the nanoparticles in solution and thin films were tested by monitoring the localized surface plasmon resonance of the GNPs. LBL thin films were prepared ranging from 25 to 100 layers with optical densities at plasmon from 0.5 to 3.0. Sensitivity in solutions ranged from 14 to 1002 nm/RIU and films ranged from 18.8 to 135.1 nm/RIU suggesting reduced access to the GNPs within the films. Polymer Mediated Layer-by-layer Assembly of Different Shaped Gold Nanoparticles