Recent progress in detection of mercury using surface enhanced Raman spectroscopy — A review

Abstract

Concerns over exposure to mercury have motivated the exploration of cost-effective, rapid, and reliable method for monitoring Hg 2+ in the environment. Recently, surface-enhanced Raman scattering (SERS) has become a promising alternative method for Hg 2+ analysis. SERS is a spectroscopic technique which combines modern laser spectroscopy with the optical properties of nano-sized noble metal structures, resulting in substantially increased Raman signals. When Hg 2+ is in a close contact with metallic nanostructures, the SERS effect provides unique structural information together with ultrasensitive detection limits.This review introduces the principles and contemporary approaches of SERS-based Hg 2+ detection. In addition, the perspective and challenges are briefly discussed.

Dual mechanism-based sensing of mercury using unmodified, heteroepitaxially synthesized silver nanoparticles

“…is still a major pursuit. Recent advances in the field of nanotechnology have resulted in the development of a wide range of optical and electrochemical sensors for mercury detection (Govindhan et al 2014;Ding et al 2016;Alex et al 2016;Mao et al 2015;Cui et al 2015;Sun et al 2016). These have shown many favorable advantages over the conventional tools, including low cost of analysis, shorter analysis time, field deployability, high specificity, and ultra-sensitivity.…”

Synthesis of Metal–Organic Sulfides as Anode Materials for Lithium‐Ion Batteries at Room Temperature

“…The monomer of the macromolecule is M 3 (TMT) 2 , and the divalent metal ions could be Ni 2+ , Co 2+ , Mn 2+ , Zn 2+ , Cd 2+ , Hg 2+ , Pb 2+ , Cu 2+ , Sn 2+ , etc . Divalent metal ions form coordinate bonds with two sulfur ions; at the same time, the metal ions also coordinate with the adjacent nitrogen atoms …”

Mix‐&‐Read Determination of Mercury(II) at Trace Levels with Hybrid Mesoporous Silica Materials Incorporating Fluorescent Probes by a Simple Mix‐&‐Load Technique

“…Because Hg II has been an environmental problem for more than ac entury,anumber of methodsf or its detection by considerably simple means have been published, for example, based on sensors operating electrochemically [9,10] or spectroscopically,t he latter including colorimetric, [11] fluorometric, and Raman spectroscopic approaches. [12][13][14][15][16] With respect to probes and indicators employed, functionalized nanomaterials such as plasmonically active metal nanoparticles, [17][18][19] semiconductor nanocrystals, carbon nanotubes, [20,21] and graphene have caught up with the traditionally used indicator molecules. [22][23][24] Frequently,n anoparticles have especially been combined with biomolecules such as enzymes [25] and oligonucleotides.…”