Silver Eco-Solvent Ink for Reactive Printing of Polychromatic SERS and SPR Substrates

Sensors

Wolfgang Grünert¹  Diana I. Golovina²  Mavlavi Dustov²  Anastasia V. Grigorieva²  Alexander Yu. Polyakov²  Andrei A. Eliseev²  Efim A. Kolesnikov²  Anastasia E. Goldt²  Irina V. Sukhorukova³  Dmitry V. Shtansky³ 

[1] Department of Chemistry and Biochemistry, Ruhr-Universität Bochum, Universitätsstraße 150, Bochum 44801, Germany;Department of Materials Science and Department of Chemistry, Lomonosov Moscow State University, Leninskie gory 1, bld. 73, 119991 Moscow, Russia;National University of Science and Technology MISiS, Leninsky prospect 4, 119049 Moscow, Russia;

关键词: reactive ink;    photoreaction;    silver nanostructures;    surface-enhanced Raman scattering;    plasmon resonance;   

DOI  :  10.3390/s18020521

来源: DOAJ

【 摘 要 】

A new reactive ink based on a silver citrate complex is proposed for a photochemical route to surface-enhanced Raman spectroscopy active substrates with controllable extinction spectra. The drop-cast test of the ink reveals homogeneous nucleation of silver and colloid particle growth originating directly from photochemical in situ reduction in droplets, while the following evaporation of the deposited ink produces small nano- and micron-size particles. The prepared nanostructures and substrates were accurately characterized by electron microscopy methods and optical extinction spectroscopy. Varying the duration of UV irradiation allows tuning the morphology of individual silver nanoparticles forming hierarchical ring structures with numerous “hot spots” for most efficient Raman enhancement. Raman measurements of probe molecules of rhodamine 6G and methylene blue reached the largest signal enhancement of 106 by the resonance effects.

【 授权许可】

Unknown