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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Xu, Guifang Li, Yilin Hong, Zhensheng Dai, Hong Gong, Lingshan Zhang, Shupei Lin, Yanyu |
| Description | Author Affiliation: Dai H ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China. Electronic address: dhong@fjnu.edu.cn.); Gong L ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China.); Zhang S ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China.); Xu G ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China.); Li Y ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China.); Hong Z ( Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy Materials, College of Physics and Energy, Fujian Normal University, PR China. Electronic address: winter0514@163.com.); Lin Y ( College of Chemistry and Chemical Engineering, Fujian Normal University, Fuzhou, Fujian 350108, PR China.) |
| Abstract | A new enzyme-free all-in-one bioprobe, consisted of hematin decorated magnetic NiCo2O4 superstructure (ATS-MNS-Hb), was designed for ultrasensitive photoelectrochemical and electrochemical dual-readout immunosensing of carcinoembryonic antigen (CEA) on carbon nanohorns (CNH) support. Herein, the MNS, possessed hierarchical-ordered structure, good porosity and magnetism, acted as nanocarrier to absorb abundant Hb molecular after functionalization, providing a convenient collection means by magnetic control as well as enhanced dual-readout sensing performances. CNH superstructures were employed as support to immobilize abounding captured antibodies, and then as-designed dual mode bioprobe, covalent binding with secondary antibody of CEA, was introduced for ultrasensitive detection of CEA by sandwich immunosensing. Photoelectrochemical response originated from plentiful hematin molecular, a excellent photosensitizer with good visible light harvesting efficiency, absorbed by functionalized porous MNS. The resultant concentration dependant linear calibration range was from 10 fg/mL to 1 ng/mL with ultralow detection limit of 10 fg/mL. For electrochemical process, catalase-like property of MNS was validated, moreover, MNS-Hb hybrid exhibited much higher mimic enzyme catalytic activity and evidently amplified electrocatalytic signal, performing a wide dynamic linear range from 1 ng/mL to 40 ng/mL with low detection limit of 1 ng/mL. Additionally, due to the improved accuracy of dual signals detection, the exact diagnoses of serum samples were gotten by operating resulting dual signals with AND logic system. This work demonstrated the promising application of MNS in developing ultrasensitive, cost-effective and environment friendly dual-readout immunosensor and accurate diagnoses strategy for tumor markers. |
| ISSN | 09565663 |
| Volume Number | 77 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-03-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Tumor Markers, Biological Blood Carcinoembryonic Antigen Cobalt Chemistry Immunoassay Instrumentation Nickel Oxides Signal Processing, Computer-assisted Conductometry Equipment Design Equipment Failure Analysis Humans Magnetic Fields Metal Nanoparticles Molecular Probe Techniques Molecular Probes Chemical Synthesis Reproducibility Of Results Sensitivity And Specificity Journal Article Research Support, Non-u.s. Gov't Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry |
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