Triggered peroxidase-like activity of Au decorated carbon dots for colorimetric monitoring of Hg²⁺ enrichment in Chlorella vulgaris

Abstract

Schematic illustration of a Hg2+ colorimetric sensor based on the Hg2+ triggered peroxidase-like activity of GNP@CDs.

Carbon dot composites for bioapplications: a review

“…4A). 78 In addition to metal atoms/ions and MNPs, the composites of CDs with MOs have also been achieved through physical mixing. 79 As demonstrated, physical mixing is a facile method to prepare metal–CD composites.…”

“…Biosensors, including enzymatic sensors, immunosensors, and nucleic acid sensors, are analytical devices used to detect important organic or inorganic molecules in organisms, which combine biological components with physicochemical detectors. 317,318 Recently, applications of CDs and their composites in biosensing have been widely investigated. 319 Thanks to the unique properties of CDs, sensors derived from CDs and their composites demonstrate various advantages: (1) tunable PL emissions, which render the sensors with superior optical sensing abilities; (2) excellent PL stability, which could avoid many analysis errors caused by the degradation of fluorescent probes; (3) extremely low toxicity of the sensors due to the very nature of CDs ( i.e.…”

“…For instance, in Yan and co-workers’ study, glyoxylic acid-modified CDs (GA-CDs) were used as a FRET ratiometric fluorescent probe for the detection of Cu 2+ in aqueous solution. 388 Similarly, Chen et al also applied cyclam-functionalized CDs as a FRET nanoprobe for the detection of Cu 2+ and S. 2–389 In addition to the above examples, the detection of other important metal ions such as Ag + , Cu 2+ , Cr 6+ , and Pb 2+ has also been successfully realized with CD composite-based sensing platforms. 390–401…”

Drug Delivery using Nano-Material based Enzymes

“…They are also responsible for the activation of the apoptotic pathways in the body, which leads to severe damage. Some of the natural enzyme antioxidants and non-enzyme antioxidants are readily inactivated under nonphysiological conditions and lacks the stability to fight with the reactive oxygen stress related disorders [12]. Nanozymes with antioxidant enzymes like activity have a wide range of applications in immunoassays, biosensing, therapeutics and diagnostics.…”

Multifaceted Interaction Studies between Carbon Dots and Proteins of Clinical Importance for Optical Sensing Signals

“…A plethora of reports on the peroxidatic properties of CDs that address both basic as well as application facets of these nanomaterials are available. ,− These properties of CDs could provide qualitative or quantitative information on the peroxides present in the sample following both fluorometric and colorimetric principles. These peroxidatic functions of CDs could also be coupled with various peroxide-producing enzymatic reactions to indirectly determine the secondary analytes, which is the primary substrate for the redox enzyme catalysis, the way peroxidases are used in a bienzyme colorimetric system to extract analytical information for various analytes. − The current bienzyme systems for detecting these analytes have primarily relied upon horseradish peroxidase (HRP) that catalyzes the degradation of H 2 O 2 .…”