纳米结构
材料科学
等离子体子
拉曼光谱
表面增强拉曼光谱
纳米技术
吸附
基质(水族馆)
电子束光刻
DNA折纸
表面改性
表面等离子体子
光电子学
拉曼散射
抵抗
化学
光学
图层(电子)
物理
海洋学
有机化学
地质学
物理化学
作者
Zunhao Wang,Zhaowei Liu,Wibke Dempwolf,Julia Molle,Yuya Kanehira,Sergio Kogikoski,Markus Etzkorn,Ilko Bald,Rainer Stosch,Stefan Wundrack
出处
期刊:ACS applied nano materials
[American Chemical Society]
日期:2023-08-15
卷期号:6 (16): 14645-14655
被引量:1
标识
DOI:10.1021/acsanm.3c01776
摘要
This paper introduces an approach that enables highly adjustable surface adsorption of single plasmonic nanostructures using polar surface arrays. The plasmonic nanostructures are made from DNA origami and functionalized with gold nanoparticles for surface-enhanced spectroscopic techniques. To ensure that the contribution of individual nanostructures to the measured signal can be detected without any interference from the surrounding structures, we aimed to control the distance and set a minimum gap between the nanostructures on the substrate surface. We describe the fabrication process of the polar surface array based on electron beam lithography, followed by functionalization. Our results indicate that the concentration of DNA origami structures and the duration of the incubation primarily affect the number of adsorbed nanostructures. Density functional theory simulation explains the selective adsorption of plasmonic nanostructures due to the substrate surface properties. The spatial arrangement of nanostructures allows for the reliable identification of the Raman signal’s location, while a falsified identification resulting from agglomeration is prevented.
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