TY - JOUR
T1 - Inkjet-printed flexible electrochemical sensors based on palladium and silver-decorated, N-doped holey graphene and nano graphene
AU - Ceylan, Ebru
AU - Gurbuz, Havva Nur
AU - Kotan, Hasan
AU - Uzunoglu, Aytekin
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/2
Y1 - 2025/2
N2 - Inkjet printing is a low-cost method to deposit conductive layers with high precision for electrochemical applications. This work reports the development of flexible electrochemical sensors by inkjet printing of palladium and silver (PdAg)-decorated nitrogen-doped holey graphene and nanographene. Our novel ink formulations were printed on flexible polyethylene tetraflate (PET) substrates to fabricate robust and high-performance flexible electrochemical sensors. The physicochemical properties of the inks, including stability, surface tension, viscosity, and printability, were determined. In addition, the printed electrodes’ homogeneity, resistance, and bending resilience were assessed. The electrochemical performance of the electrodes was evaluated against hydrogen peroxide (H2O2) and glucose (Glc). The defective graphene structures had a paramount influence on the ink stability and the ultimate electrochemical performance of the flexible sensors. The sensors showed a low detection limit (LOD) of 3.5 and 0.41 µM against H2O2 and glucose, respectively, with linear ranges of 0.1–5.6 mM H2O2 and 1–19 mM glucose. Furthermore, the real sample analysis results indicated the applicability of the sensors in real samples.
AB - Inkjet printing is a low-cost method to deposit conductive layers with high precision for electrochemical applications. This work reports the development of flexible electrochemical sensors by inkjet printing of palladium and silver (PdAg)-decorated nitrogen-doped holey graphene and nanographene. Our novel ink formulations were printed on flexible polyethylene tetraflate (PET) substrates to fabricate robust and high-performance flexible electrochemical sensors. The physicochemical properties of the inks, including stability, surface tension, viscosity, and printability, were determined. In addition, the printed electrodes’ homogeneity, resistance, and bending resilience were assessed. The electrochemical performance of the electrodes was evaluated against hydrogen peroxide (H2O2) and glucose (Glc). The defective graphene structures had a paramount influence on the ink stability and the ultimate electrochemical performance of the flexible sensors. The sensors showed a low detection limit (LOD) of 3.5 and 0.41 µM against H2O2 and glucose, respectively, with linear ranges of 0.1–5.6 mM H2O2 and 1–19 mM glucose. Furthermore, the real sample analysis results indicated the applicability of the sensors in real samples.
KW - Electrochemical sensor
KW - Flexible sensor
KW - Graphene
KW - Holey graphene
KW - Inkjet printing
UR - http://www.scopus.com/inward/record.url?scp=85214301152&partnerID=8YFLogxK
U2 - 10.1016/j.microc.2025.112682
DO - 10.1016/j.microc.2025.112682
M3 - Article
AN - SCOPUS:85214301152
SN - 0026-265X
VL - 209
JO - Microchemical Journal
JF - Microchemical Journal
M1 - 112682
ER -