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Adeniyi K, Oyinlola K, Achadu OJ, Menard H, Grillo F, Yang Z, Adegoke O. Molecularly Imprinted Viral Protein Integrated Zn-Cu-In-Se-P Quantum Dots Superlattice for Quantitative Ratiometric Electrochemical Detection of SARS-CoV-2 Spike Protein in Saliva. ACS APPLIED NANO MATERIALS 2024; 7:17630-17647. [PMID: 39144398 PMCID: PMC11320384 DOI: 10.1021/acsanm.4c02882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 07/17/2024] [Accepted: 07/18/2024] [Indexed: 08/16/2024]
Abstract
Solution-processable colloidal quantum dots (QDs) are promising materials for the development of rapid and low-cost, next-generation quantum-sensing diagnostic systems. In this study, we report on the synthesis of multinary Zn-Cu-In-Se-P (ZCISeP) QDs and the application of the QDs-modified electrode (QDs/SPCE) as a solid superlattice transducer interface for the ratiometric electrochemical detection of the SARS-CoV-2-S1 protein in saliva. The ZCISeP QDs were synthesized through the formation of In(Zn)PSe QDs from InP QDs, followed by the incorporation of Cu cations into the crystal lattice via cation exchange processes. A viral-protein-imprinted polymer film was deposited onto the QDs/SPCE for the specific binding of SARS-CoV-2. Molecular imprinting of the virus protein was achieved using a surface imprinting electropolymerization strategy to create the MIP@QDs/SPCE nanosensor. Characterization through spectroscopic, microscopic, and electrochemical techniques confirmed the structural properties and electronic-band state of the ZCISeP QDs. Cyclic voltammetry studies of the QDs/SPCE superlattice confirmed efficient electron transport properties and revealed an intraband gap energy state with redox peaks attributed to the Cu1+/2+ defects. Binding of SARS-CoV-2-S1 to the MIP@QDs/SPCE cavities induced a gating effect that modulated the Fe(CN)6 3-/4- and Cu1+/2+ redox processes at the nanosensor interface, producing dual off/on ratiometric electrical current signals. Under optimal assay conditions, the nanosensor exhibited a wide linear detection range (0.001-100 pg/mL) and a low detection limit (0.34 pg/mL, 4.6 fM) for quantitative detection of SARS-CoV-2-S1 in saliva. The MIP@QDs/SPCE nanosensor demonstrated excellent selectivity against nonspecific protein targets, and the integration with a smartphone-based potentiostat confirmed the potential for point-of-care applications.
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Affiliation(s)
- Kayode
Omotayo Adeniyi
- Leverhulme
Research Centre for Forensic Science, School of Science & Engineering, University of Dundee, Dundee DD1 4GH, U.K.
| | - Kayode Oyinlola
- Leverhulme
Research Centre for Forensic Science, School of Science & Engineering, University of Dundee, Dundee DD1 4GH, U.K.
| | - Ojodomo J. Achadu
- School
of Health and Life Sciences, and National Horizon Centre, Teesside University, Middlesbrough TS1 3BA, U.K.
| | - Herve Menard
- Leverhulme
Research Centre for Forensic Science, School of Science & Engineering, University of Dundee, Dundee DD1 4GH, U.K.
| | - Federico Grillo
- School
of Chemistry, University of St Andrews, St Andrews KY16 9ST, U.K.
| | - Zhugen Yang
- School
of Water, Energy and Environment, Cranfield
University, Cranfield MK43 0AL, U.K.
| | - Oluwasesan Adegoke
- Leverhulme
Research Centre for Forensic Science, School of Science & Engineering, University of Dundee, Dundee DD1 4GH, U.K.
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Xu Y, Ben Y, Sun L, Su J, Guo H, Zhou R, Wei Y, Wei Y, Lu Y, Sun Y, Zhang X. Sensing platform for the highly sensitive detection of catechol based on composite coupling with conductive Ni 3(HITP) 2 and nanosilvers. Phys Chem Chem Phys 2024; 26:2951-2962. [PMID: 38214187 DOI: 10.1039/d3cp05391a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
Catechol, which has a high toxicity and low degradability, poses significant risks to both human health and the environment. Tracking of catechol residues is essential to protect human health and to assess the safety of the environment. We constructed sensing platforms to detect catechol based on the conductive metal-organic frameworks [Ni3(HITP)2] and their nanosilver composites. The reduction process of catechol at the Ni3(HITP)2/AgNP electrode is chemically irreversible as a result of the difference in compatibility of the oxidation stability and conductivity between the Ni3(HITP)2/AgNS and Ni3(HITP)2/AgNP electrodes. The electrochemical results show that the Ni3(HITP)2/AgNS electrode presents a lower detection limit of 0.053 μM and better sensitivity, reproducibility and repeatability than the Ni3(HITP)2/AgNP electrode. The kinetic mechanism of the catechol electrooxidation at the surface of the electrode is controlled by diffusion through a 2H+/2e- process. The transfer coefficient is the key factor used to illustrate this process. During the electrochemical conversion of phenol to ketone, more than half of ΔG is used to change the activation energy. We also studied the stability, anti-interference and reproducibility of these electrode systems.
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Affiliation(s)
- Yuandong Xu
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yingying Ben
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Lili Sun
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Jishan Su
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Hui Guo
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Rongjia Zhou
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yaqing Wei
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Yajun Wei
- School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China
| | - Yongjuan Lu
- School of Chemical Engineering, Northwest Minzu University, Lanzhou 730030, China
| | - Yizhan Sun
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
| | - Xia Zhang
- School of Chemistry and Chemical Engineering, Henan University of Technology, Zhengzhou 450001, China.
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Farokhi S, Roushani M. Flower-like core-shell nanostructures based on natural asphalt coated with Ni-LDH nanosheets as an electrochemical platform for prostate cancer biomarker sensing. Mikrochim Acta 2023; 190:198. [PMID: 37126101 DOI: 10.1007/s00604-023-05779-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 04/02/2023] [Indexed: 05/02/2023]
Abstract
Flower-like core-shell nanostructures based on natural asphalt (NA) coated with nickel-layered double hydroxide nanosheets (Ni-LDH NSs) were synthesized for the first time. The synthetic nanostructures were successfully used as an efficient platform in the design of sarcosine (SAR) electrochemical aptasensor. SAR is considered an efficient biomarker for prostate cancer (PCa) diagnosis. However, the low concentration of SAR in urine, plasma, and tissue cells has limited the growth of SAR biosensors. The performance of the presented SAR aptasensor is very promising in being applied as a portable device in the identification of PCa. After drawing the calibration curve, the linear concentration range was obtained in two ranges from 5 pM to 100 nM and 100 nM to 7.9 μM, and the limit of detection (LOD) was calculated to be 1.6 pM. This study can provide a basis for wider research in various programs such as developing PCa diagnostic aptasensors and investigating the use of NA nanostructures in other electrochemical applications such as electrocatalysis and energy storage.
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Affiliation(s)
- Somayeh Farokhi
- Department of Chemistry, Faculty of Sciences, Ilam University, P. O. BOX, Ilam, 69315-516, Iran
| | - Mahmoud Roushani
- Department of Chemistry, Faculty of Sciences, Ilam University, P. O. BOX, Ilam, 69315-516, Iran.
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Faisal M, Alam M, Ahmed J, Asiri AM, Algethami JS, Alkorbi A, Madkhali O, Aljabri MD, Rahman MM, Harraz FA. Electrochemical detection of nitrite (NO2) with PEDOT:PSS modified gold/PPy-C/carbon nitride nanocomposites by electrochemical approach. J IND ENG CHEM 2023. [DOI: 10.1016/j.jiec.2023.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
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