Synthesis of dual-functional Ag/Au nanoparticles based on the decreased cavitating rate under alkaline conditions and the colorimetric detection of mercury(ii) and lead(ii)

Abstract

Synthesis of Ag/Au core–shell nanoparticles with two LSPR modes and the specific detection of Hg2+and Pb2+.

Hydrogels allow the precise growth tracking of plasmonic gold nanoparticles for mercury analysis

“…The developed sensing strategy was compared with previous works in terms of sensing response mechanism, recognition role, analysis phase, limit of detection (LOD), and stability (Table S2, ESI †). [40][41][42][43][44][45][46] The simplified nanostaining hydrogel protocol exhibits comparable selectivity and high stability, which is independent of the reaction time. Thus, the practical applications of hydrogel-based sensing techniques are promoted.…”

Manipulating Bimetallic Nanostructures With Tunable Localized Surface Plasmon Resonance and Their Applications for Sensing

“…Lin and Wang et al prepared a new type of Au-Ag nanorods with an Au seed at one tip of the rod, and monitored the selective etching of Ag from another tip for hypochlorite detection (Li et al, 2019a). The strategy of etching surface Ag of Au-Ag nanoparticles with different shapes (e.g., spheres, rods, and bipyramids) were also applied for sensing of a variety of different analytes such as cyanide (Zeng et al, 2014;Li Y. et al, 2016), iodide (Qi et al, 2017), Hg 2+ /Pb 2+ (Yang et al, 2015;Xing et al, 2018), permanganate (Ye et al, 2018), benzoyl peroxide (Lin et al, 2018), MicroRNA (Gu et al, 2017) and proteins Liu W. et al, 2015).…”

Determination of Pb2+ by Colorimetric Method Based on Catalytic Amplification of Ag Nanoparticles Supported by Covalent Organic Frameworks

“…Therefore, it is necessary to develop a simple, sensitive and selective analytical platform for the detection of Pb 2+ . At present, the detection methods of Pb 2+ include electrochemical method [16,17], colorimetric method [18], surface-enhanced Raman scattering (SERS) spectroscopy [19], nuclear magnetic resonance sensor [20], fluorescence method [21], chemiluminescence method [22], resonance light scattering method [23], etc. Among them, the electrochemical method is simple and sensitive, but there are many factors affecting electrode modification, which is not conducive to control and real-time monitoring experiments.…”