![]() ![]() Therefore, a smart design of chemical interactions between analytes and the nanoparticles surface may lead to gradual optical changes, which can be probed by various sensing methods, allowing quantitative analyte detection. Plasmonic nanoparticle colloids may exhibit strong colours in the visible region due to localized surface plasmon resonances, whereas their aggregates exhibit different linear and nonlinear optical properties. Typical advanced examples of the newly developed AuNPs-based colorimetric and electrochemical sensors and their applications in detection of various analytes, including biomolecules, metal ions, and organic environmental hormones are presented and discussed.read more read lessĪbstract: Plasmonic nanoparticles made of gold and silver have attracted a great deal of research attention in various fields, such as biosensors, imaging, therapy, nanophotonics, catalysis and light harvesting due to their unique optical and electronic properties. We summarize the typical synthetic strategies of AuNPs, classify the mechanism analysis of AuNPs-based sensors, and expound the role of AuNPs in these sensors. Therefore, in this review we summarize some recent progresses made in the field of AuNPs research. Besides, the development for AuNPs application is very fast in modern science. ![]() However, few of these reviews include the detection of inorganic and organic contaminant, as well as biomolecules at the same time. ![]() Most of them tend to review a certain kind of analyte using one kind of technique. The development of AuNPs used in sensor has been reviewed in some previous papers. The use of AuNPs in sensor fabrication is widespread, and so many papers have been reported over the past years. They have been very popularly used as labels in diagnostics, sensors, etc. We have also demonstrated that our DLS assay is capable of measuring the amount of Pb(II) in paint, plastic toys.read more read lessĪbstract: Gold nanoparticles (AuNPs), the huge potential functional nanoparticles in scientific research, have attained tremendous interest for their unique physical–optical property since they have been discovered. The sensitivity of our assay to detect Pb(II) level in water is almost 2 orders of magnitude higher than the EPA standard limit. Driven by the need to detect trace amounts of Pb(II) from water samples, we report a label-free, highly selective and ultra sensitive glutathione modified gold nanoparticle based dynamic light scattering (DLS) probe for Pb(II) recognition in 100 ppt level from aqueous solution with excellent discrimination against other heavy metals. As a result, the development of ultrasensitive assays for the real-time detection of Pb(II) from plastic toys and paints is very important for water controlling, clinical toxicology and industrial processes. children of ages 1−5 have high levels of lead in their blood that it is due to the exposure to lead from plastic toys and other products. Abstract: Pb (II) is a common water pollutant with high toxicity. ![]()
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