Journal
RSC ADVANCES
Volume 6, Issue 31, Pages 26203-26209Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra26273a
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Funding
- National Natural Science Foundation of China [21405072, 21505065]
- Project of Shandong Province Higher Educational Science and Technology Program [J14LC14, J14LC15]
- Shandong Provincial Natural Science Foundation [ZR2014BL022, ZR2014BL023, ZR2014BL026]
- State Key Laboratory of Analytical Chemistry for Life Science [SKLACLS1407]
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A ternary composite of hemin-reduced graphene oxide-Au nanoparticles (H-RGO-Au) with a higher electrocatalytic activity for the reduction of hydrogen peroxide than that of the hemin-graphene component was synthesized and was used as a catalyst to initiate sensitive electrochemiluminescence (ECL) quenching of quantum dots (QDs) due to the electrocatalytic reduction of the coreactant H2O2. Based on this and specifically on the recognition between concanavalin A (Con A) and mannose or N-glycans on the cell surface, an ultrasensitive cytosensor for the detection of 5 cancer cells was first proposed. The designed strategy shows the possibility of expansive application of versatile ECL cytosensing platforms for the detection of many important biomolecules.
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