TY - GEN
T1 - Design of an interdigitated microelectrode biosensor using a-SiC:H surface to capture E. coli
AU - Herrera-Celis, Jose
AU - Reyes-Betanzo, Claudia
AU - Orduna-Diaz, Abdu
N1 - Publisher Copyright:
© 2015 IEEE.
PY - 2015/10/13
Y1 - 2015/10/13
N2 - This work proposes an interdigitated microelectrode biosensor (IMB), which includes hydrogenated amorphous silicon carbide (a-SiC:H) as surface to be functionalized. Accordingly, two a-SiC:H films are included, one on top of SiO2, and another on top of microelectrodes. The design along with the medium were simulated on CoventorWare® software, taking into account that the IMB proposed will be for the detection of Escherichia coli. The influence of both the a-SiC:H thin film and the capture of bacteria on electrodes on the impedance spectroscopy of the biosensor in the range of 10 kHz to 100 MHz was studied. The results show that the higher the conductivity of the thin film on microelectrodes, the lower is the increase of the magnitude of the impedance spectrum measured in presence of the sterile blank solution, and that the capture of bacteria on microelectrodes increases the sensitivity. The maximum percentage change in the magnitude of impedance of the PIMB is about 45 times greater than that of the conventional interdigitated microelectrode biosensor (CIMB).
AB - This work proposes an interdigitated microelectrode biosensor (IMB), which includes hydrogenated amorphous silicon carbide (a-SiC:H) as surface to be functionalized. Accordingly, two a-SiC:H films are included, one on top of SiO2, and another on top of microelectrodes. The design along with the medium were simulated on CoventorWare® software, taking into account that the IMB proposed will be for the detection of Escherichia coli. The influence of both the a-SiC:H thin film and the capture of bacteria on electrodes on the impedance spectroscopy of the biosensor in the range of 10 kHz to 100 MHz was studied. The results show that the higher the conductivity of the thin film on microelectrodes, the lower is the increase of the magnitude of the impedance spectrum measured in presence of the sterile blank solution, and that the capture of bacteria on microelectrodes increases the sensitivity. The maximum percentage change in the magnitude of impedance of the PIMB is about 45 times greater than that of the conventional interdigitated microelectrode biosensor (CIMB).
KW - Impedance spectroscopy
KW - functionalization
KW - hydrogenated amorphous silicon carbide
KW - interdigitated microelectrode biosensor
UR - http://www.scopus.com/inward/record.url?scp=84961805893&partnerID=8YFLogxK
U2 - 10.1109/SBMicro.2015.7298142
DO - 10.1109/SBMicro.2015.7298142
M3 - Contribución a la conferencia
AN - SCOPUS:84961805893
T3 - SBMicro 2015 - 30th Symposium on Microelectronics Technology and Devices
BT - SBMicro 2015 - 30th Symposium on Microelectronics Technology and Devices
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 30th Symposium on Microelectronics Technology and Devices, SBMicro 2015
Y2 - 31 August 2015 through 4 September 2015
ER -