TY - JOUR
T1 - Description of ionophore-doped membranes with a blocked interface
AU - Sanders, Tarun M.
AU - Myers, Matthew
AU - Asadnia, Mohsen
AU - Umana-Membreno, Gilberto A.
AU - Baker, Murray
AU - Fowkes, Neville
AU - Parish, Giacinta
AU - Nener, Brett
PY - 2017/10
Y1 - 2017/10
N2 - Ion sensors with blocked interfaces, such as coated-wire electrodes (CWEs) and ion-selective field effect transistors (ISFETs), are increasingly being used as alternatives to traditional ion-selective electrodes (ISEs). This work provides insights into the behaviour of ionophore-doped membranes in solution, where one side completely blocks ion transfer, using the Nernst-Planck-Poisson (NPP) model, including reaction terms. Extensive investigations were conducted, demonstrating that the NPP model provides reasonable predictions, as well as insight into the interplay between interfacial kinetics, complexation, diffusion and electrical processes. Model validation is achieved through its application to and analysis of experimental results obtained for AlGaN/GaN ISFETs with ionophore-doped membranes.
AB - Ion sensors with blocked interfaces, such as coated-wire electrodes (CWEs) and ion-selective field effect transistors (ISFETs), are increasingly being used as alternatives to traditional ion-selective electrodes (ISEs). This work provides insights into the behaviour of ionophore-doped membranes in solution, where one side completely blocks ion transfer, using the Nernst-Planck-Poisson (NPP) model, including reaction terms. Extensive investigations were conducted, demonstrating that the NPP model provides reasonable predictions, as well as insight into the interplay between interfacial kinetics, complexation, diffusion and electrical processes. Model validation is achieved through its application to and analysis of experimental results obtained for AlGaN/GaN ISFETs with ionophore-doped membranes.
KW - Nernst-Planck-Poisson
KW - Membranes
KW - Ionophore
KW - Electro-diffusion
UR - http://www.scopus.com/inward/record.url?scp=85019036228&partnerID=8YFLogxK
UR - http://purl.org/au-research/grants/arc/DP140100827
U2 - 10.1016/j.snb.2017.04.143
DO - 10.1016/j.snb.2017.04.143
M3 - Article
AN - SCOPUS:85019036228
VL - 250
SP - 499
EP - 508
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
ER -