Topographically Flat Nanoplasmonic Sensor Chips for Biosensing and Materials Science

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• 作者：Ferry Anggoro Ardy Nugroho ; Rickard Frost ; Tomasz J. AntosiewiczJoachim Fritzsche ; Elin M. Larsson Langhammer ; Christoph Langhammer
• 刊名：ACS Sensor
• 出版年：2017
• 出版时间：January 27, 2017
• 年：2017
• 卷：2
• 期：1
• 页码：119-127
• 全文大小：681K
• ISSN：2379-3694

文摘

Nanoplasmonic sensors typically comprise arrangements of noble metal nanoparticles on a dielectric support. Thus, they are intrinsically characterized by surface topography with corrugations at the 10–100 nm length scale. While irrelevant in some bio- and chemosensing applications, it is also to be expected that the surface topography significantly influences the interaction between solids, fluids, nanoparticles and (bio)molecules, and the nanoplasmonic sensor surface. To address this issue, we present a wafer-scale nanolithography-based fabrication approach for high-temperature compatible, chemically inert, topographically flat, and laterally homogeneous nanoplasmonic sensor chips. We demonstrate their sensing performance on three different examples, for which we also carry out a direct comparison with a traditional nanoplasmonic sensor with representative surface corrugation. Specifically, we (i) quantify the film-thickness dependence of the glass transition temperature in poly(methyl metacrylate) thin films, (ii) characterize the adsorption and specific binding kinetics of the avidin–biotinylated bovine serum albumin protein system, and (iii) analyze supported lipid bilayer formation on SiO₂ surfaces.