TY - JOUR
T1 - Forming more and sharper sensing protrusions on graphene-based electrodes through annealing
AU - Stehle, Yijing Y.
AU - Qualls, Hayden
AU - Cortez, Rebecca
AU - Duang, Sang
AU - Vlassiouk, Ivan
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/9
Y1 - 2024/9
N2 - A better understanding of the microstructure, physicochemical properties, and sensing behavior of an electrode is critical in developing quick, high sensitivity, and robust electrochemical sensors. In this study, a single electrode was fabricated with self-prepared graphene ink through a drop-cast process followed with a subsequent annealing treatment. The graphene ink-based electrodes were characterized through AFM, contact angle, FTIR, impedance spectra, Raman, and SEM to understand annealing treatment effects. The dynamic response of the electrode to humidity, and vapors of ethanol, propanol, or acetone was measured using a four-point probe station in a closed chamber. The annealing treatment increased the conductivity of the electrode and improved its sensing performance by forming more and sharper protrusions on the electrode surface. These unique surface protrusions suggest that the annealed graphene ink-based electrodes hold great potential in developing high-performance electrochemical sensors.
AB - A better understanding of the microstructure, physicochemical properties, and sensing behavior of an electrode is critical in developing quick, high sensitivity, and robust electrochemical sensors. In this study, a single electrode was fabricated with self-prepared graphene ink through a drop-cast process followed with a subsequent annealing treatment. The graphene ink-based electrodes were characterized through AFM, contact angle, FTIR, impedance spectra, Raman, and SEM to understand annealing treatment effects. The dynamic response of the electrode to humidity, and vapors of ethanol, propanol, or acetone was measured using a four-point probe station in a closed chamber. The annealing treatment increased the conductivity of the electrode and improved its sensing performance by forming more and sharper protrusions on the electrode surface. These unique surface protrusions suggest that the annealed graphene ink-based electrodes hold great potential in developing high-performance electrochemical sensors.
KW - Annealing
KW - Electrochemical sensor
KW - Electrode
KW - Graphene
KW - Response time
UR - http://www.scopus.com/inward/record.url?scp=85197505226&partnerID=8YFLogxK
U2 - 10.1016/j.flatc.2024.100707
DO - 10.1016/j.flatc.2024.100707
M3 - Article
AN - SCOPUS:85197505226
SN - 2452-2627
VL - 47
JO - FlatChem
JF - FlatChem
M1 - 100707
ER -