Simple silver nanoparticle colorimetric sensing for copper by paper-based devices

Colorimetric sensing of copper(II) based on catalytic etching of gold nanoparticles

“…Under the optimized conditions, the Cu 2+ -specific probe exhibits high sensitivity towards Cu 2+ but also high selectivity over other possible interference ions. The method is also highlighted by its simplicity and rapidity as compared to many other nanoparticles-based colorimetric methods [32][33][34][35][36][37][38][39][40][41]. Compared with our former research [28], the present work is more timesaving and sensitive to naked-eyes.…”

Nanomaterial-functionalized Cellulose: Design, Characterization and Analytical Applications

“…A well-known example is the use of AuNPs that can easily detect compounds with thiol groups through the affinity of Au for sulfur. 74 This method was utilized for detection of cysteine and homocysteine amino acids which play an important role in cardiovascular disease and immune deficiency syndrome. 75 To enhance selectivity, NPs can be modified with selective ligands or biomolecular recognition receptors like antibodies (Ab) or DNA.…”

“…77 Color based detection has been demonstrated for detection of metal ions for assessing environmental toxicity. 7 Molecules that have high affinity for metal ions like ethylenediaminetetraacetic acid (EDTA), 78 dithiothreitol (DTT) 74 and polyethyleneimine (PEI) 79 and some proteins like bovine serum albumin (BSA) 2 can be patterned to create capture sites and facilitate analysis on paper substrates through complexation coupled with color-based reactions. Another strategy for colorimetric detection is exploiting NP aggregation.…”

Investigating the versatility of multifunctional silver nanoparticles: preparation and inspection of their potential as wound treatment agents

“…The colorimetric detection of AgNPs utilizes its ability to recognize metal ions and alter the solution's optical properties by aggregation, thus simplifying the detection method [41]. Ratnarathorn et al developed a simple AgNP-bound paperbased copper colorimetric sensing devices [42]. These devices allowed the users to rapidly and easily detect the presence of copper in solutions with a detection limit of 7.8 nM with the naked eye.…”