Screening of plasmonic properties of composed metal nanoparticles by combinatorial synthesis in micro-fluid segment sequences
Screening of plasmonic properties of composed metal nanoparticles by combinatorial synthesis in micro-fluid segment sequences
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DOI：
10.1016/j.cej.2012.10.008
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发表时间：
2013-07-01
影响因子：
15.1
通讯作者：
Koehler, J. M.
中科院分区：
文献类型：
--
作者：
Knauer, A.;Schneider, S.;Koehler, J. M.
将一套用于管段生成和混合的微流动系统、一套用于流体驱动的PC控制的注射泵和一套用于颗粒表征的光学多通道系统应用于反应混合物的组合变化，以合成等离子体纳米颗粒。反应物浓度组合的完整空间是通过对水的一个组分的组合缓慢变化的流速和第二个溶液的周期性快速变化的流速组合自动生成微流体段序列来实现的。用差示离心沉淀法、紫外可见光谱和扫描电子显微镜对纳米胶体产物溶液进行了表征。粒度分布光谱和光学光谱反映了组成对颗粒质量的影响。在纳米颗粒合成筛选的情况下，金属盐、还原剂、离子强度和pH的浓度可以改变。参数空间的多维寻址可用于寻找用于窄尺寸或形状分布的最佳反应条件以及用于光学性质的调谐。(C)2012爱思唯尔B.V.保留所有权利。
A micro-flow-through system comprising a manifold for segment generation and mixing, a set of PC-controlled syringe pumps for fluid actuation and an optical multi-channel system for particle characterization were applied for combinatorial variation of reaction mixtures for the synthesis of plasmonic nanoparticles. The complete space of combinations of reactant concentrations was realized by an automated generation of micro-fluid segment sequences by a combined slowly shifting flow rate of one component, and a periodically fast shifting flow rate of a second solution, both against water. The nanoparticles colloidal product solutions are characterized by differential centrifugal sedimentation spectroscopy (DCS), UV/VIS and SEM. The size distribution spectra and the optical spectra indicate the effect of composition on the particle quality. In case of nanoparticle synthesis screenings, the concentration of metal salts, reducing agent, ion strength and pH can be varied. The multi-dimensional addressing of parameter spaces can be used for finding optimal reaction conditions for a narrow size or shape distribution as well as for a tuning of the optical properties. (C) 2012 Elsevier B.V. All rights reserved.