Waste Fiber Powder Functionalized with Silver Nanoprism for Enhanced Raman Scattering Analysis

Abstract

Biomass disks based on fine powder produced from disposed wool fibers were prepared for surface-enhanced Raman scattering (SERS). The wool powders (WPs) were modified by silver nanoprisms via an assembly method and then pressed into disks using a hydraulic laboratory pellet press. Scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS) were used to characterize the WPs and disks before and after treatment with silver nanoparticles (AgNPs). The WPs retained porous structures after treatment with AgNPs. The silver nanoprisms on WPs were observed clearly and the localized surface plasmon resonance (LSPR) properties of silver nanoprisms led to blue color of wool powder (WP). The obtained WP disks with AgNPs were confirmed to enhance greatly the Raman signal of thiram. The SERS disks are low-cost and convenient to use, with high sensitivity. The characteristic SERS bands of 10−8 M thiram can be identified from WP disks containing silver nanoparticles.

Rapidly colorimetric detection of caffeine in beverages by silver nanoparticle sensors coupled with magnetic molecularly imprinted polymeric microspheres

“…In the recent years, silver nanoparticles (AgNPs) have been widely used in surface‐enhanced Raman scattering, surface plasmon resonance and localised surface plasmon resonance for their unique optical properties (Liu et al ., ; Zhang et al ., ). Colorimetric detection based on AgNPs has also become a hotspot (Hossain et al ., ; Tang et al ., ). The interaction between AgNPs and analytes can change the size and shape of the particles and the interparticle distances, which lead to some colour variations of solution (Cassar et al ., ).…”

Photocatalytic Properties of Core-Shell Structured Wool-TiO2 Hybrid Composite Powders

“…The mechanical properties, glass transition temperature, and thermal decomposition temperature of poly(propylene carbonate) could be greatly improved when a small content of wool powders was added [12]. Furthermore, the wool powders could be modified with silver nanoprisms via an assembly method at first, and then pressed into disks to enhance the Raman signal of thiram with high sensitivity [13].…”

Fabrication process and characterization of AgNPs/PVA/cellulose as a SERS platform for in-situ detection of residual pesticides in fruit

“…It works through the excitation of localized plasmons and thus causing the amplification of the local electromagnetic fields generated from such excitation [1]. The properties of these localized surface plasmons resonance have been linked to other physical properties of the noble metal nanoparticles used as plasmonic materials, including size, shape and surrounding media [2]. Plasmonic materials are chosen to preferably possess high surface area and special optical property in order to offer an amplified response.…”