We describe a rapid, sensitive, and low-cost method to detect bisphenol A (BPA) using an anodized aluminum oxide-based capacitive sensor. BPA is detected by measuring the change in capacitance caused by the biospecific binding of BPA with a BPA aptamer that is immobilized on the electrode surface. For a solution containing 100 pM BPA, the capacitance decreased by approximately 3%. In addition, we fabricated a capacitive sensor array and demonstrated that BPA in environmental samples can be measured using our capacitive sensor.
Bibliographical noteFunding Information:
This work has been financially supported by the National Research Foundation of Korea through the National Core Research Center for Nanomedical Technology (Grant No. R15-20040924-00000-0).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)