In this section
@article{Holicky:2024:10.1063/5.0226780,
author = {Holicky, M and Fenech-Salerno, B and Cass, A and Torrisi, F},
doi = {10.1063/5.0226780},
journal = {Applied Physics Letters},
title = {Fabrication of graphene field effect transistors on complex non-planar surfaces},
url = {http://dx.doi.org/10.1063/5.0226780},
volume = {125},
year = {2024}
}
TY - JOUR
AB - Graphene field effect transistors (GFETs) are promising devices for biochemical sensing. Integrating GFETs ontocomplex non-planar surfaces could uncap their potential in emerging areas of wearable electronics, such as smartcontact lenses and microneedle sensing. However, the fabrication of GFETs on non-planar surfaces is challengingusing conventional lithography approaches. Here, we develop a combined spray coating and photolithography setupfor the scalable fabrication of GFETs on non-planar surfaces and demonstrate their application as integrated GFETs onmicroneedles. We optimize the setup to pattern 67 µm long GFET channels across the microneedle tips. Graphene isdeposited between photo-patterned electrodes by spray coating a liquid-phase exfoliated graphene ink, while monitoringthe channel resistance to achieve the required conductivity. The successful formation of the GFET channels is confirmedby SEM and EDX mapping, and the GFETs are shown to modulate in solution. This demonstrates an approach for themanufacturing of graphene electronic devices on complex non-planar surfaces like microneedles and opens possibilitiesfor wearable GFET microneedle sensors for real-time monitoring of biomarkers.
AU - Holicky,M
AU - Fenech-Salerno,B
AU - Cass,A
AU - Torrisi,F
DO - 10.1063/5.0226780
PY - 2024///
SN - 0003-6951
TI - Fabrication of graphene field effect transistors on complex non-planar surfaces
T2 - Applied Physics Letters
UR - http://dx.doi.org/10.1063/5.0226780
UR - https://pubs.aip.org/aip/apl/article/125/11/113301/3311829/Fabrication-of-graphene-field-effect-transistors
UR - http://hdl.handle.net/10044/1/114188
VL - 125
ER -
Dr Felice Torrisi
Senior Lecturer in Chemistry of Two-Dimensional Materials
401A
Molecular Sciences Research Hub
White City Campus
f.torrisi@imperial.ac.uk
+44 (0)20 7594 5818