TY - GEN
T1 - Nanoelectrochemical sensor systems
T2 - 6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019
AU - O’Riordan, Alan
AU - Seymour, Ian
AU - O’Sullivan, Benjamin
AU - Wahl, Amelie J.C.
AU - Lovera, Pierre
AU - Rohan, James F.
N1 - Publisher Copyright:
© 2019 Association for Computing Machinery.
PY - 2019/9/25
Y1 - 2019/9/25
N2 - Nanoelectrochemical sensors comprising of single gold nanowires or interdigitated nanowire arrays were simulated, designed and then fabricated on silicon chip substrates. Each chip comprised of six nanoscale electrodes (100 nm wide, 50 nm high and 45 µm long), on-chip counter & reference electrodes and an SD pinout. Finite element simulations, confirmed by experiment, suggested that electrolysing water, which increases H+ and OH-ions at the anode and cathode, respectively, would allow local pH control at interdigitated nanowire sensors. The interdigitated nanowire arrays also enabled generator-collector type measurements to be undertaken, providing more sensitive results and also the ability to tailor the chemistry temporally and spatially at sensor locations. SIRC behaviour was also observed when one comb of the interdigitated array was allowed to electrically float and the electrode array demonstrated enhanced sensitivity. Dissolved oxygen detection using nanowire arrays showed enhanced sensing when compared to state of the art sensors.
AB - Nanoelectrochemical sensors comprising of single gold nanowires or interdigitated nanowire arrays were simulated, designed and then fabricated on silicon chip substrates. Each chip comprised of six nanoscale electrodes (100 nm wide, 50 nm high and 45 µm long), on-chip counter & reference electrodes and an SD pinout. Finite element simulations, confirmed by experiment, suggested that electrolysing water, which increases H+ and OH-ions at the anode and cathode, respectively, would allow local pH control at interdigitated nanowire sensors. The interdigitated nanowire arrays also enabled generator-collector type measurements to be undertaken, providing more sensitive results and also the ability to tailor the chemistry temporally and spatially at sensor locations. SIRC behaviour was also observed when one comb of the interdigitated array was allowed to electrically float and the electrode array demonstrated enhanced sensitivity. Dissolved oxygen detection using nanowire arrays showed enhanced sensing when compared to state of the art sensors.
KW - Electroanalysis
KW - Electroanalysis
KW - Generator collector
KW - Nanowire electrodes
KW - Self-induced redox cycling
UR - https://www.scopus.com/pages/publications/85073808820
U2 - 10.1145/3345312.3345500
DO - 10.1145/3345312.3345500
M3 - Conference proceeding
AN - SCOPUS:85073808820
T3 - Proceedings of the 6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019
BT - Proceedings of the 6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019
PB - Association for Computing Machinery, Inc
Y2 - 25 September 2019 through 27 September 2019
ER -