SERS-based test strips: Principles, designs and applications

Recent Developments in Plasmonic Sensors of Phenol and Its Derivatives

“…Raman spectroscopic technologies-including micro-Raman mapping, imaging, and SERS spectroscopy-have been widely adopted in many fields such as food safety [97], the monitoring of contaminants [98], and the diagnosis of disease biomarkers [99]. Raman substrates may be divided by several kinds of pure noble metal nanostructured materials, hybrid nanomaterials, and MOF structures.…”

A microscopic survey on microplastics in beverages: the case of beer, mineral water and tea

“…Investigations on 15 types of beers produced worldwide and four types of Chinese tea leaves revealed the ubiquitous occurrence of microplastic pollution to all the daily beverages, despite characteristics of number and distribution for the shape of microplastics in each beverage. By coupling with the finger-printing feature of Raman spectroscopy, 13–15 the presence of polystyrene (PS) and polypropylene (PP) microplastics in beers, PP in bottled mineral water, and polyethylene (PE) and polyethylene terephthalate (PET) in tea leaves were identified (Fig. 1).…”

Nanoelectrokinetic-assisted lateral flow assay for COVID-19 antibody test

“…Research is underway to improve the sensitivity and specificity of LFAs to achieve more accurate and high-performance POCT. Such investigations have primarily focused on assay optimization (reagent and receptor) ( Dighe et al, 2022b , Dighe et al, 2022a ; Garg et al, 2021a , Garg et al, 2021b ; Grant et al, 2020b , Grant et al, 2020a ; Yu et al, 2020b , Yu et al, 2020a ; Zhang et al, 2021b , Zhang et al, 2021a ), signal amplification (chemical enhancement and electrochemistry and fluorescence reader) ( Cheng et al, 2017a , Cheng et al, 2017b ; Wang et al, 2017a , Wang et al, 2017b , 2021b ), and sample enrichment (magnetic separation and electrokinetic pre-concentration) ( Kang et al, 2021b , Kang et al, 2021a ; Wang et al, 2021aa , Wang et al, 2021ba , Wang et al, 2021ab , Wang et al, 2021bb ; Zhou et al, 2021a , Zhou et al, 2021b ) to achieve high sensitivity and selectivity ( Dempsey and Rathod, 2018b , Dempsey and Rathod, 2018a ; Han et al, 2020a , Han et al, 2020b ; Jia et al, 2018b , Jia et al, 2018a ; Li et al, 2019a , Li et al, 2019b ; Loynachan et al, 2018b , Loynachan et al, 2018a ; Mu et al, 2019b , Mu et al, 2019a ; Niu et al, 2020a , Niu et al, 2020b , Niu et al, 2021a , Niu et al, 2021b ; Ojaghi et al, 2018a , Ojaghi et al, 2018b ; Xu et al, 2014a , Xu et al, 2014b ). As one of the sample enrichment techniques, our group described a nanoelectrokinetic (NEK)-based method for sample enrichment on paper, illustrating that bovine serum albumin (BSA) can be preconcentrated by up to five times the initial concentration in serum ( Han et al, 2018b , Han et al, 2018a ; Jeong et al, 2018b , Jeong et al, 2018a ).…”