Functionalized gold nanoparticles/reduced graphene oxide nanocomposites for ultrasensitive electrochemical sensing of mercury ions based on thymine–mercury–thymine structure

Advanced AuNMs as nanomedicine’s central goals capable of active targeting in both imaging and therapy in biomolecules

“…Thus, a LOD as low as 0.06 nM could be obtained for Hg 2+ . Furthermore, in 2016, Wang et al [94] presented a sensitive, selective and reusable EC biosensor for determination of Hg 2+ based on thymine modified AuNPs/reduced graphene oxide nanocomposites ( Figure 6). Notably, the developed EC sensors afforded excellent selectivity for Hg 2+ against other heavy metal ions including Zn 2+ , Cd 2+ , Pb 2+ , Cu 2+ , Ni 2+ and Co 2+ .…”

Portable and low cost fluorescence set-up for in-situ screening of Ochratoxin A

“…The genera Aspergillus and Penicillium produced their metabolites such as Ochratoxin A (OTA), a common contaminant of cocoa and cocoa based products especially from these regions of Africa particularly in Nigeria [5]. However, with the maximum admissible value of OTA established in 2µg/kg, about 40% of the cocoa which arrives in Europe may be rejected at the ports [6]. OTA was classified as a group 2B carcinogen by the International Agency for Research on Cancer (IARC) in 1993, being possibly carcinogenic to humans [7].…”

Gold nanoparticle-based sensing platform of hydrazine, sulfite, and nitrite for food safety and environmental monitoring

“…The metal and semiconductor nanoparticles has gained enormous interest on the electrochemical interfaces to develop the electrochemical nanoscale systems for various catalytic and sensor applications (Alammari et al 2015;Keeley et al 2016;Wang et al 2016;Wang et al 2015). The metal nanoparticles play a key role in catalytic and electrocatalytic reactions which may empower numerous functionalities to line up for the targeted applications because of the interactivity of essential nanostructured sensor elements with their immediate local environments (Chen and Chatterjee 2013;Govindhan et al 2014, Huber et al 2015Maduraiveeran and Ramaraj 2009).…”