Journal
ANALYTICA CHIMICA ACTA
Volume 1141, Issue -, Pages 110-119Publisher
ELSEVIER
DOI: 10.1016/j.aca.2020.10.044
Keywords
Graphdiyne; Nanodiamonds; Detection of myoglobin; Detection of cardiac troponin I; Electrochemical aptasensor
Categories
Funding
- National Natural Science Foundation of China [U1604127]
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The novel heteronanostructure of HsGDY@NDs, combining the advantages of HsGDY and NDs, exhibits superior sensing performance for biomarkers and shows high selectivity, stability, and reproducibility in real human serum.
A novel heteronanostructure of nanodiamonds (NDs) and hydrogen-substituted graphdiyne (HsGDY) (denoted as HsGDY@NDs) was prepared for the impedimetric aptasensing of biomarkers such as myoglobin (Myo) and cardiac troponin I (cTnl). Basic characterizations revealed that the HsGDY@NDs were composed of nanospheres with sizes of 200-500 nm. In these nanospheres, NDs were embedded within the HsGDY network. The HsGDY@NDs nanostructure, which integrated the good chemical stability and three-dimensional porous networks of HsGDY, and the good biocompatibility and electrochemical activity of NDs, could immobilize diverse aptamer strands and recognize target biomarkers. Compared with HsGDY- and NDs-based aptasensors, the HsGDY@NDs-based aptasensors exhibited superior sensing performances for Myo and cTnl, giving low detection limits of 6.29 and 9.04 fg mL(-1) for cTnl and Myo, respectively. In addition, the HsGDY@NDs-based aptasensors exhibited high selectivity, good stability, reproducibility, and acceptable applicability in real human serum. Thus, the construction of HsGDY@NDs-based aptasensor is expected to broaden the application of porous organic frameworks in the sensing field and provide a prospective approach for the early detection of disease biomarkers. (C) 2020 Elsevier B.V. All rights reserved.
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