12 research outputs found
Boron Doped Diamond Paste Electrodes for Microfluidic Paper-Based Analytical Devices
Boron
doped diamond (BDD) electrodes have exemplary electrochemical
properties; however, widespread use of high-quality BDD has previously
been limited by material cost and availability. In the present article,
we report the use of a BDD paste electrode (BDDPE) coupled with microfluidic
paper-based analytical devices (μPADs) to create a low-cost,
high-performance electrochemical sensor. The BDDPEs are easy to prepare
from a mixture of BDD powder and mineral oil and can be easily stencil-printed
into a variety of electrode geometries. We demonstrate the utility
and applicability of BDDPEs through measurements of biological species
(norepinephrine and serotonin) and heavy metals (Pb and Cd) using
μPADs. Compared to traditional carbon paste electrodes (CPE),
BDDPEs exhibit a wider potential window, lower capacitive current,
and are able to circumvent the fouling of serotonin. These results
demonstrate the capability of BDDPEs as point-of-care sensors when
coupled with μPADs