Durian-like multi-functional Fe3O4–Au nanoparticles: synthesis, characterization and selective detection of benzidine
Durian-like multi-functional Fe3O4–Au nanoparticles: synthesis, characterization and selective detection of benzidine
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DOI：
10.1039/c3ta11477e
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发表时间：
2013-08
影响因子：
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通讯作者：
Zhijiang Wang;Lina Wu;Fu-ping Wang;Zhaohua Jiang;B. Shen
中科院分区：
文献类型：
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作者：
Zhijiang Wang;Lina Wu;Fu-ping Wang;Zhaohua Jiang;B. Shen
采用一种简单的层层组装法制备了一种新型的榴莲状多功能水溶性Fe 3 O 4-Au纳米复合材料。然后将金纳米粒子负载到Fe 3 O 4表面，通过Au-S化学键合进行稳定。所制备的纳米复合材料继承了其构建块的优异物理和化学性质，同时表现出超顺磁性、表面等离子体共振和表面增强拉曼散射（Sers）活性特性。基于Fe 3 O 4纳米粒子团簇的磁性分离性和表面金的Sers活性，建立了一种快速、简便的联苯胺选择性检测方法，检测限为0.18ppm。
A novel durian-like multi-functional water soluble Fe3O4–Au nanocomposite is fabricated via a facile layer-by-layer technology in which a mercapto-silica shell is utilized as a functional coating on the central Fe3O4 nanoparticle cluster. Then gold nanoparticles are loaded onto the surface of Fe3O4, stabilized by Au–S chemical bonding. The fabricated nanocomposites inherit excellent physical and chemical properties from their building blocks, simultaneously exhibiting superparamagnetic, surface plasmon resonance and surface enhanced Raman scattering (SERS) active properties. Based on the magnetic separability of the inner Fe3O4 nanoparticle clusters and the SERS active properties of the suface gold, a selective detection method for benzidine has been developed for rapid detection and ease of operation with a low detection limit of 0.18 ppm.