Nanocomposite Au/Si Cantilevers for Tip-Enhanced Raman Scattering (TERS) Sensors

被引:1
作者
Slekiene, Nora [1 ]
Snitka, Valentinas [2 ]
机构
[1] Univ Vilnius, Inst Biomed Sci, Fac Med, Pharm & Pharmacol Ctr, MK Ciurlionio G 21-27, LT-03101 Vilnius, Lithuania
[2] Kaunas Univ Technol, Res Ctr Microsyst & Nanotechnol, 65 Studentu Str, LT-51369 Kaunas, Lithuania
关键词
Tip-enhanced Raman spectroscopy (TERS); electrochemical etching; electroless deposition; sputtering; all-metal Au cantilevers; OPTICAL MICROSCOPY; GRAPHENE OXIDE; GOLD TIPS; SPECTROSCOPY; FABRICATION; PROBES;
D O I
10.3390/chemosensors11040218
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this study, we proposed and tested different procedures for the preparation of Au/Si cantilevers for Tip-enhanced Raman spectroscopy (TERS). The preparation of Au/Si TERS sensors was based on three methods: chemical (electroless) deposition, thermal evaporation of Au on the tip of commercially available cantilevers in a vacuum, and electrochemical etching of Au microwires. We fabricated and tested four types of TERS probes, and then used these probes for TERS measurements using graphene oxide (GO) as the target analyte. The probe tips were characterized using scanning electron microscopy (SEM). This article presents a comparative analysis of the fabrication methods, quality of the obtained probe tips, and enhancement factors (EFs) for the four types of TERS cantilevers (probes) produced by chemical deposition, sputtering, and electrochemical methods.
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页数:17
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