Nylon membranes modified by gold nanoparticles as surface-enhanced Raman spectroscopy substrates for several pesticides detection

Abstract

Nylon membranes modified by gold nanoparticles as substrates showed preferable test reproducibility and appropriate sensitivity. This process provided a low-cost and reliable SERS testing strategy for qualitative and quantitative analysis.

Colloidal nanomaterials for water quality improvement and monitoring

“…The lightweight and flexibility of membrane SERS substrates can also be combined with portable Raman spectrometers and smartphones, providing on-site detection ( Gao et al, 2016 ; Guo et al, 2019 ; Sun et al, 2021 ). Several filtering membranes have been used as SERS substrates, such as cellulose (paper) ( Lee et al, 2010 ; Moram et al, 2018 ; Wu et al, 2018 ; Jiao et al, 2022 ), polyamide (PA) ( Yu and White, 2012 ; Shi et al, 2014 ; Fateixa et al, 2018a ; Yu et al, 2021 ), PVDF ( Yu and White, 2012 ; Gao et al, 2016 ; Guo et al, 2019 ; Sun et al, 2021 ), and derived polymer-based composites ( Fateixa et al, 2018b ; Ankudze et al, 2019 ; Ye et al, 2020 ). Polymer-based membranes offer flexibility, porosity and extensive fibrillar networks for surface chemical functionalization, which are important features for substrates fabrication, but they are not SERS active themselves.…”

“…In this regard, plasmonic nanoparticles such as Ag or Au NPs are often used as the SERS active phases present in the filter membranes. The attachment of metal NPs onto the filter membranes can be performed by different approaches, such as 1) filtering colloidal NPs through the membrane ( Yu and White, 2012 ; Shi et al, 2014 ; Fateixa et al, 2018a ); 2) blending or in situ growth of NPs within the filter membrane ( Lee et al, 2010 ; Moram et al, 2018 ; Wu et al, 2018 ; Yu et al, 2021 ); 3) coating the filter membrane with Au/Ag assembled structures ( Guo et al, 2016 ); 4) modification of the fibres with NPs prior the membrane fabrication ( Guo et al, 2016 ; Fateixa et al, 2018b ; Ankudze et al, 2019 ).…”

“…They have demonstrated that this simple, economic and fast method provides efficient SERS substrates, which not only pre-concentrate the target analyte but also decrease the analysis detection time, with improvements in the Raman signal reproducibility of the molecular probe used. This topic was further explored in other laboratories using distinct filter membranes and plasmonic NPs with diverse morphologies, such as spherical Ag and Au NPs ( Guo et al, 2016 ; Fateixa et al, 2018b ; Sun et al, 2021 ; Yu et al, 2021 ), nanorods and nanowires ( Lee et al, 2010 ; Shi et al, 2014 ; Wu et al, 2018 ; Ankudze et al, 2019 ), nanostars and nanourchins ( Mehn et al, 2013 ; Xu et al, 2021a ), and Au/Ag alloys or core-shell ( Moram et al, 2018 ; Sha et al, 2020 ; Khan et al, 2022 ). Yu et al (2021) have investigated Au/PA filter membranes for pesticide detection by comparing distinct fabrication methods, including in situ reduction, immersion-adsorption, and filtration.…”

Fabric-based in situ synthesis of gold nanoparticles for continuous enhanced heterogeneous chemiluminescence online detection of carbon dioxide

“…Since the surface of the nylon fiber is positively charged, AuNPs can be captured by electrostatic adsorption. 20 The synthesized AuNPs can be effectively combined with nylon microfiber fabrics by complexity and electrostatic interaction.…”

Green Textile Materials for Surface Enhanced Raman Spectroscopy Identification of Pesticides Using a Raman Handheld Spectrometer for In-Field Detection

“…16 The methodology is also increasingly investigated for applications to detect pesticides. [17][18][19] The fast and easy in-field identification of pesticides becomes more and more important as bans on pesticides, such as imidacloprid, thiamethoxam, or clothianidin, grow. 20,21 Potential hazards for the terrestrial and aquatic environment rely on the detection of the pesticides.…”