Plasmonic nanogels for naked-eye sensing of food adulterants

Abstract

Cellulose based nanoplasmonic sensors gained immense attention for various applications due to their advantrageous physicochemical characteristics such as ease fabrication, low density, chirality, surface functionlization and disposal. Herein, hydrogels based...

Developing a Rapid and Sensitive Colorimetric Sensor for Detection of Food Adulterant Rhodamine‐B in Real Samples

“…From the Table S1, it is clear that the functional groups C−C/C=C, C−O and C=O from BZ‐EXT interact with nitrogen groups of Rh−B through hydrogen bonding and polar interactions. Upon the addition of BZ‐EXT in Rh−B, evidently, the color of the solution turned from pink to redish colour which indicates the aggregation of BZ‐EXT due to the decreased interparticle distance (SPR coupling) [59] …”

“…From the Table S1, it is clear that the functional groups CÀ C/C=C, CÀ O and C=O from BZ-EXT interact with nitrogen groups of RhÀ B through hydrogen bonding and polar interactions. Upon the addition of BZ-EXT in RhÀ B, evidently, the color of the solution turned from pink to redish colour which indicates the aggregation of BZ-EXT due to the decreased interparticle distance (SPR coupling) [59] Figure 5 (a) displays the fluorescence spectra of BZ-EXT, RhÀ B, and conjugates with different concentration of BZ-EXT, excited by 530 nm. From Figure 5(a) it is clear that BZ-EXT has almost no fluorescence, while RhÀ B shows the strong emission intensity at around 580 nm.…”