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首页> 外文期刊>Advanced Powder Technology: The internation Journal of the Society of Powder Technology, Japan >Three-dimensional periodic structures of gold nanoclusters in the interstices of sub-100 nm polymer particles toward surface-enhanced Raman scattering
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Three-dimensional periodic structures of gold nanoclusters in the interstices of sub-100 nm polymer particles toward surface-enhanced Raman scattering

机译：亚100nm聚合物颗粒间隙朝向表面增强拉曼散射的三维周期性结构

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摘要

Regularly ordered polymer nanoparticle (PNP) assemblies incorporating gold nanoparticle (Au NP) clusters into the PNP interstices were fabricated by a simultaneous deposition of PNPs and Au NPs on a glass substrate. Monodisperse PNPs with an average size of 66 nm were employed as a template in the co-assembly to create the sub-100 nm periodic Au nanostructures on the substrate. First, mono-layering of PNP array with incorporation of 14 nm Au NPs was performed by a drop-casting to examine the number ratio of Au NPs to PNPs for multi-layering. Absorption spectra of the mono-layered co-assemblies of PNPs and Au NPs were employed to characterize the clustered state of Au NPs in the interstices of mono-layered PNPs. The number ratio suitable for homogeneous incorporation of Au NPs clustered in the interstice was found to be ranged from 6 to 8 in the characterization. Then, multi-layered co-assemblies of PNPs and clustered Au NPs were fabricated by a vertical deposition method with the Au NP number ratio of 8 to PNPs. Lifting rate of the substrate on which the PNPs were deposited was varied in the vertical deposition method to tune the film thickness of NP co-assembly. A decrease in the lifting rate to 1 mu m/s could thicken the film to 0.71 mu m corresponding to 13 layers of PNPs, resulting in the fabrication of periodic structures of Au NP clusters with a high packing density. Signal-to-noise ratio in the Raman measurement using p-mercaptobenzoic acid as a target molecule was successfully enhanced by multi-layering of the co-assembly, indicating that Au NP clusters were homogeneously incorporated into the interstices of PNPs in the co-assemblies. (C) 2019 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
机译：通过在玻璃基板上同时沉积PNP和Au nP，通过同时沉积PNP和Au nps来制造将金纳米颗粒（Au NP）簇的定期有序的聚合物纳米粒子（PNP）组件掺入PNP间隙中。使用平均尺寸为66nm的单分散PNP作为共同组件中的模板，以在基材上产生亚100nm周期性Au纳米结构。首先，通过液滴施加掺入14nM Au nps的PNP阵列的单分层，以检查Au nps对多层的PNP的数量比。使用PNPS和Au NPS的单层共组装的吸收光谱来表征单层PNP间隙中Au NP的聚类状态。发现适合于间隙中聚集在间隙中的Au NP均匀掺入的数量比率范围为6至8。然后，通过垂直沉积方法制造多层PNP和聚类AU NP的共组合，其具有8至PNP的Au NP数比。沉积PNP的基材的提升速率在垂直沉积方法中变化，以调谐NP共组装的膜厚度。提升速率降低至1μm/ s可以使膜变稠至对应于13层的PNPS0.71μm，导致具有高填充密度的Au NP簇的周期性结构的制造。通过共组装的多层成功增强了使用p-巯基苯甲酸作为靶分子的拉曼测量中的信噪比，表明Au NP簇均匀地掺入共组合中PNP的间隙中。 （c）2019年日本粉末技术学会。由elsevier b.v发表。和日本粉末科技会。版权所有。

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