SPR responsive xylenol orange functionalized gold nanoparticles- optical sensor for estimation of Al3+ in water

Rapid and selective detection of aluminum ion using 1,2,3-triazole-4,5-dicarboxylic acid-functionalized gold nanoparticle-based colorimetric sensor

“…34,35 In recent years, rapid detection of Al 3+ using AuNPs as a colorimetric sensor have been reported, in which the AuNPs' surface were functionalized by different Al 3+ recognition ligands, such as diaminodiphenyl sulfone, 36 ascorbic acid, 37 11mercaptoundecanoic acid, 38 5-mercaptomethyltetrazole, 39 poly(acrylic acid), 40 triazole ether, 41 catechol, 42 and xylenol orange. 43 Their detection limits via UV-vis and the naked eye, detection time, and interference ions are summarized in Table 1. It is clear that different ligands have great inuence on the sensitivity and selectivity of the sensors.…”

“…However, most of these sensors show low sensitivity with naked eye detection, which is higher than the current limit (3.7 mM) in drinking water, [36][37][38][39][40][41] need long detection time [38][39][40][41] or suffer from interferences. 36 Some efforts have been made to decrease the naked eye detection limits to 3.5 mM, 42 and 2.8 mM, 43 which can almost meet the limit requirement in drinking water. 1,2,3-Triazole-4,5dicarboxylic acid (TADA), with both triazole and carboxyl groups in the structure, was found to have strong binding force to AuNPs.…”

“…The detection time is 90 s and the detection limits via UV-vis and the naked eye were determined to be 15 nM and 1.5 mM, respectively, better than the previous reports. [36][37][38][39][40][41][42][43] We propose that this TADA-AuNPs colorimetric method might be suitable for real-time rapid detection of Al 3+ ion in water, milk, soil, and other foods.…”

Dual colorimetric sensing of ascorbic acid and thyroxine using Ag–EGCG–CTAB via a DFT approach

“…By manipulating the functionalization of AuNPs, they can be used in sensing different pollutants such as Al 3+ , Cr 3+ , and Pb 2+ . [1][2][3] AgNPs also have an edge over other metal nanoparticles due to their higher SPR effect and were promising in sensing different compounds such as Ni 2+ , citrate, and vitamin B1. [4][5][6] Greensynthesized nanoparticles are taken into foreseeing nowadays due to their promising effect in cost-effective applications along with their eco-friendly nature.…”

Mesoporous silica and gold-based nanodevices: new controlled delivery platforms for biomedical applications

“…There are a large number of approaches to synthesize gold nanoparticles to finely control the size, [137][138][139] shape, [140] and surface functionality. [141][142][143][144] Generally,…”