Screening of Multiparameter Spaces for Silver Nanoprism Synthesis by Microsegmented Flow Technique

Screening of Multiparameter Spaces for Silver Nanoprism Synthesis by Microsegmented Flow Technique
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微分段流技术合成银纳米棱柱的多参数空间筛选

DOI:
10.1002/cite.201200206
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发表时间:
2013
影响因子:
1.9
通讯作者:
J.M. Köhler
J.M. Köhler
中科院分区:
工程技术4区
文献类型:
--
作者:
A. Knauer;J.M. Köhler

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在这项工作中,提出了一种在微流体段中湿化学合成纳米银的过程中,反应物溶液的组合变化与等离子体性质的原位UV-Vis读数相结合的方法。由自动流速程序生成明显可区分的组合物的片段序列。通过两个组合的缓慢移动和两个反向快速变化的反应物流量,以20 %的步长完全覆盖了二维参数空间。由于银纳米管的灵敏主偶极子模式,在合成过程中的组合浓度变化为颗粒尺寸和光学性质的调节提供了新的可能性。在一次组合合成过程中,获得了边缘长度在35~200 nm之间、主等离激元共振在550~900 nm之间的银纳米结构。
In this work, a method of combinatorial variation of reactant solutions combined with an in situ UV‐Vis readout of the plasmonic properties during the wet‐chemical synthesis of Ag nanoprisms in micro fluid segments is presented. Segment sequences of clearly distinguishable compositions are generated by an automated flow rate program. By the help of two combined slowly shifting and two contrariwise rapidly changing reactant flow rates, a two dimensional parameter space is covered completely in steps of 20 %. Due to the sensitive main dipole mode of Ag nanoprisms, a combinatorial concentration variation during the growth step of the synthesis opens new possibilities regarding tuning of particle size and optical properties. Here, within one combinatorial synthesis run, silver nanoprisms with edge length between 35 and 200 nm and main plasmon resonances between 550 and 900 nm were obtained.
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