A highly sensitive and selective biosensing strategy for the detection of Pb2+ ions based on GR-5 DNAzyme functionalized AuNPs

Electrochemiluminescence of graphitic carbon nitride and its application in ultrasensitive detection of lead(II) ions

“…The present work not only may enrich the foundation study about the ECL characteristic of g-C 3 N 4 QDs but also would promote its practical application. Graphene QDs/L-cysteine coreactant ECL System 100-10000 70 [2] Photoelectrochemical DNAzyme sensor 0.5-20 0.1 [40] Enzyme-free strip biosensor based on a catalytic DNA circuit -0.01 [4] Fluorescence biosensor based on GR-5 DNAzyme functionalized AuNPs 1-100 0.25 [41] Electrochemical sensor based on cascade DNA and quantum dots amplification 0.01-500 0.0061 [39] A signal-on ECL biosensor for lead ion based on DNAzyme 0.005-0.08 0.0014 [42] ECLsensor using quantum dots based on a G-quadruplex aptamer 0.02-10 0.0108 [43] ECL of CdTe QDs capped with glutathione and thioglycolic acid 0. …”

Trace colorimetric detection of Pb 2+ using plasmonic gold nanoparticles and silica–gold nanocomposites

“…Metallic nanoparticles, especially gold nanoparticles (AuNPs), have emerged and received much attention for colorimetric sensing of biomolecules and many heavy metal ions due to their high extinction coefficients, size and distance-dependent optical properties [1,2,[25][26][27][28][29]. To successfully integrate these nanomaterials for the selective detection of different species, the…”

A Pb2+-ion electrochemical biosensor based on single-stranded DNAzyme catalytic beacon

“…Aroused by this, DNAzyme have been converted into biosensors for lead detection by colorimetric [13,14], fluorescence [15,16], electrochemiluminescent [17,18], or electrochemical methods [19−21].…”