Droplet-Based Microfluidic Synthesis of Anisotropic Metal Nanocrystals
Droplet-Based Microfluidic Synthesis of Anisotropic Metal Nanocrystals
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DOI：
10.1002/smll.200901453
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发表时间：
2009-12-04
期刊：
影响因子：
13.3
通讯作者：
Khan, Saif A.
中科院分区：
文献类型：
--
作者：
Duraiswamy, Suhanya;Khan, Saif A.
提出了一种基于微流控的制备各向异性金纳米晶体分散体的方法。金纳米粒子种子和生长试剂在微通道内被分配成单分散的皮升液滴。限制在小液滴内可以防止生长的纳米晶体与微通道壁之间的接触。将基于烧瓶的宏观方法转化为基于流动的微流体方法的关键因素是，重点强调和方法被证明可以灵活地将纳米颗粒形状分为三大类：球体/球体，棒状和扩展的锐边结构，从而改变可见光-近红外（NIR）光谱范围内的光学共振。
A droplet-based microfluidic method for the preparation of anisotropic gold nanocrystal dispersions is presented. Gold nanoparticle seeds and growth reagents are dispensed into monodisperse picoliter droplets within a microchannel. Confinement within small droplets prevents contact between the growing nanocrystals and the microchannel walls. The critical factors in translating macroscale flask-based methods to a flow-based microfluidic method arc, highlighted and approaches are demonstrated to flexibly fine time nanoparticle shapes into three broad classes: spheres/spheroids, rods, and extended sharp-edged structures, thus varying the optical resonances in the visible-near-infrared (NIR) spectral range.