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By coupling shell-isolated nanoparticle-enhanced Raman spectroscopy (SHINERS) with paper chromatography, two birds with one stone method were developed for simultaneous on-site separation and optical detection of multiple components. The established method features high sensitivity of plasmon-enhanced sensing strategies and sufficient temporal and spatial resolution of planar chromatographic techniques.
One of the main problems of the nanoparticle dispersion state change (e.g. from dispersion to aggregation) based surface-enhanced Raman scattering (SERS) detection is that the dynamic process of such in-solution reactions is always uncontrollable. This leads to poor reproducibility from a narrow time window of all such strategies, and finally great difference between the data from the diverse methods,...
A label-free surface-enhanced Raman spectroscopy (SERS)-based method for the rapid quantification detection of cellular biothiols at picomolar levels was developed by using a mechanism of binary competitive adsorption to regulate the plasmon coupling behavior of gold nanoparticles (Au NPs). 4,4′-Dipyridyl (Dpy), a small organic ligand with two symmetrically located pyridine rings, was used to shorten...
The fabrication of SERS substrates, which can offer the advantages of strong Raman signal enhancement with good reproducibility and low cost, is still a challenge for practical applications. In this work, a simple three-dimensional (3D) paper-based SERS substrate, which contains plasmonic silver-nanoparticles (AgNPs), has been developed by the silver mirror reaction. This paper strip was characterized...
A nonenzymatic hydrogen peroxide (H 2 O 2 ) sensor was fabricated using the reduced graphene oxide (RGO) and ferroferric oxide (Fe 3 O 4 ) nanocomposites as the sensing material. The nanocomposites were synthesized by coprecipitation method and characterized by high-resolution transmission electron microscopy and X-ray diffraction. Results showed that the RGO sheet...
An automated system using on-line solid-phase extraction (SPE) high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection was developed for the determination of tetracyclines (TCs), such as tetracycline (TC), oxytetracycline (OTC), chlortetracycline (CTC), metacycline (MC), and doxycycline (DC) in honey. One milliliter diluted honey sample was injected into a conditioned C18 SPE...
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