Manipulating spectral properties of the Hg (II) sensitive carbazole-oxadiazole derivative by silver nanoparticles: Two different sensing mechanisms for the same probe

Statistically Optimized Production of Saccharides Stabilized Silver Nanoparticles Using Liquid–Plasma Reduction Approach for Antibacterial Treatment of Water

“…EDX spectrum also confirmed the presence of C, O, Si, K, Cl and Ag absorbance peaks. The elemental signals of Ca and Na obtained in EDX spectrum may appear due to the sugar solution and/or likely to be produced by X-ray emissions from the glass substrate utilized during EDX analysis, as revealed earlier by Nangia et al [ 40 ]. FT-IR and EDX studies revealed that AgNPs can be functionalized by using different stabilizers/saccharides during the synthesis process.…”

“…The published literature suggests that AgNPs, produced with AgNO 3 salt in the presence of different stabilizing agents, have UV peaks in the wavelength range of 300 nm [ 40 , 41 ]. The SPR peak shifts toward the shorter wavelength with a decrease in the absorbance due to the increased destabilization of the nanoparticles.…”

“…The amino acids are covalently attached to many different proteins. The UV peak of sugar stabilized AgNP complexes in literature is reported at about 300 nm [ 40 , 41 , 48 , 49 , 50 ]. The nanoparticles interact with stabilizing agents through electrostatic interaction with free amine groups or asparagine residues in proteins.…”

Process Optimization of Silver Nanoparticle Synthesis and Its Application in Mercury Detection

“…This phenomenon is because the amalgam formed by mercury ions and AgNPs affects the surface of NPs no longer oxidized, so the detection range of Hg 2+ is limited. Although the continuous improvement of the detection limit of AgNPs for Hg 2+ was not affected [ 45 , 46 , 47 , 48 , 49 , 50 ], this meant that the color rendering methodology using the absorbance value of amalgam may correspond to two completely different Hg concentrations. Therefore, this study recommends that when applying the mercury contamination concentration range for the first time and/or at an unexpected detection range, carrying out a double or more dilution for the sample, and measuring with this approach, so the absorbance of this diluted sample will clearly show whether the concentration locates in the 0–12.5 μg/L or 25–500 μg/L range.…”

A turn-on fluorescent probe with high selectivity for Hg2+ and its applications in living cells

“…There are a number of uorescence probes for Hg 2+ . However, some reported probes have several limitations such as exhibited uorescent "on-off" behavior owing to the intrinsic spectral property of Hg 2+ , [16][17][18] solubility in organic solvents, 19 non-colorimetric 20 and difficult synthesis. [21][22][23] Therefore, the development of a colorimetric probe with a simple procedure, low detection limit, and "off-on" behavior in an aqueous solution is still necessary.…”