Nanosized quantum dots-wrapped metallic particles ensembles integrated into filter disc-based analytical device for garlic evaluation. Application to monitor fake pickled garlic in balsamic vinegar.

Herein, an affordable and simple analytical device is presented to portable identify of garlic in 30 min; the evaluation needs no pre-treatment of sample. The analytical device fabrication was did employing a headspace-based nanosensor array using of inexpensive materials as commercial filter discs, quantum dots (QDs), and metallic nanoparticles (MNPs). The nanoarray is fabricated by the accumulation QDs on MNPs surface, that results in the production of ensembles of QDs/MNPs.

Fully united, easy, and economical sensor array for newborn babies' amino acids monitoring: Identification of amino acids in healthy and unhealthy with PKU newborn babies.

Amino acid (AA) disorders are the main class of inborn errors of metabolism with diverse medical presentations. This paper was aimed to provide a novel and efficient sensor array for the quantification and differentiation of AAs using different pH buffer solutions as sensor elements (SEs) and nanocurcumin (NC) in the role of a marker in biofluids of newborn babies. Amino and carboxyl groups along with the side chain of different AAs in different pH buffer solutions are protonated or deprotonated.

Highly specific fingerprinting of alkaline earth metal ions by a tunable plasmonic nanosensor array based on nanoaggregation of metallochromic dyes-AuNPs.

Metal ions, specifically alkaline earth metal ions (AEMIs; Mg, Ca, Sr, and Ba), have essential roles in industrial processes, medical testing, and environmental evaluation; therefore, developing sensitive detection methods capable of their contents is highly required. To this aim, we have designed an absorbance nanosensor array using three metallochromic dyes decorated on AuNPs and have monitored variations in AuNP plasmonic profiles upon the addition of AEMIs in different buffer and pH solutions. The array is designed in a tunable size of 2 × 3 × 1(2/3); as the type buffer and pH of solution are fixed, the number of dyes can be changed in three individual modes, three binary modes, and a ternary mode, respectively.