Complete carbohydrate-based synthetic strategy for an efficient plasmonic metal and alloy nanostructured SERS substrate

IF 5.45 Q1 Physics and Astronomy

Nano-Structures & Nano-Objects Pub Date : 2025-04-01 DOI:10.1016/j.nanoso.2025.101476

Sumitha Chandran , Bijal K. Bahuleyan , Shibin Thomas

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引用次数: 0

Abstract

Surface enhanced Raman spectroscopy (SERS) has grown to be one of the most effective spectroscopic methods with a wide range of applications since the discovery of enhanced spectrum of pyridine on a silver electrode. However, the challenges in fabricating an affordable, simple, and long-lasting substrate restricts its application in devices. In this study, we report for the first time on a novel, inexpensive polymer-based SERS substrate made by thermally evaporating colloidal solutions of metal and alloy nanoparticles over humid sheets of cellulose acetate (CA). Green synthetic strategies were adopted for preparing nanoparticles using glucose as the reducing agent and starch as the capping agent. Au, Ag and their alloys decorated CA sheets were prepared, and the nanoparticle formation is confirmed by UV-Visible absorption spectroscopy. Diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDAX), atomic force microscopy (AFM) and Fourier transform infra-red (FT-IR) spectroscopy were used for the characterization of the nanoparticle decorated CA sheets. 1,4-benzenedithiol (1,4-BDT) is used as the Raman active molecule for SERS studies. A noticeably greater Raman enhancement was observed using these sheets, demonstrating the potential of these substrates for use in SERS-based devices.

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来源期刊

Nano-Structures & Nano-Objects Physics and Astronomy-Condensed Matter Physics

CiteScore

9.20

自引率

0.00%

发文量

审稿时长

22 days

期刊介绍： Nano-Structures & Nano-Objects is a new journal devoted to all aspects of the synthesis and the properties of this new flourishing domain. The journal is devoted to novel architectures at the nano-level with an emphasis on new synthesis and characterization methods. The journal is focused on the objects rather than on their applications. However, the research for new applications of original nano-structures & nano-objects in various fields such as nano-electronics, energy conversion, catalysis, drug delivery and nano-medicine is also welcome. The scope of Nano-Structures & Nano-Objects involves: -Metal and alloy nanoparticles with complex nanostructures such as shape control, core-shell and dumbells -Oxide nanoparticles and nanostructures, with complex oxide/metal, oxide/surface and oxide /organic interfaces -Inorganic semi-conducting nanoparticles (quantum dots) with an emphasis on new phases, structures, shapes and complexity -Nanostructures involving molecular inorganic species such as nanoparticles of coordination compounds, molecular magnets, spin transition nanoparticles etc. or organic nano-objects, in particular for molecular electronics -Nanostructured materials such as nano-MOFs and nano-zeolites -Hetero-junctions between molecules and nano-objects, between different nano-objects & nanostructures or between nano-objects & nanostructures and surfaces -Methods of characterization specific of the nano size or adapted for the nano size such as X-ray and neutron scattering, light scattering, NMR, Raman, Plasmonics, near field microscopies, various TEM and SEM techniques, magnetic studies, etc .