期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 2, 期 7, 页码 1649-1655出版社
AMER CHEMICAL SOC
DOI: 10.1021/sc500106y
关键词
Electrochemical impedance spectroscopy; Biosensors; Sustainability; Endocrine-disrupting chemicals; Nanotechnology
资金
- National Science Foundation [ECCS-1342618]
- National Institute of Environmental Health Sciences [P42 ES04699]
- Directorate For Engineering
- Div Of Electrical, Commun & Cyber Sys [1342618] Funding Source: National Science Foundation
Due to their all-electrical nature, impedance biosensors have significant potential for use as simple and portable sensors for environmental studies and environmental monitoring. Detection of two endocrine-disrupting chemicals (EDC), norfluoxetine and BDE-47, is reported here by impedance biosensing, with a detection limit of 8.5 and 1.3 ng/mL for norfluoxetine and BDE-47, respectively. Although impedance biosensors have been widely studied in the academic literature, commercial applications have been hindered by several technical limitations, including possible limitations to small analytes, the complexity of impedance detection, susceptibility to nonspecific adsorption, and stability of biomolecule immobilization. Recent research into methods to overcome these obstacles is briefly reviewed. New results demonstrating antibody regeneration atop degenerate (highly doped) Si are also reported. Using 0.2 M KSCN and 10 mM HF for antibody regeneration, peanut protein Ara h 1 is detected daily during a 30 day trial.
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