Journal
ACS APPLIED NANO MATERIALS
Volume 3, Issue 2, Pages 1166-1174Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsanm.9b01795
Keywords
lignosulfonate; laser-scribed graphene; high conductivity; biosensor; MXene; glucose; lactate; alcohol
Funding
- King Abdullah University of Science and Technology (KAUST)
Ask authors/readers for more resources
Laser scribing of porous graphene electrodes on flexible substrates is of great interest for developing disposable electrochemical biosensors. In this work, we present a new patterning process for highly conductive nitrogen-doped graphene derived from a lignin-based precursor. A CO2 laser scribing process was performed under ambient conditions to produce the porous graphene electrodes from lignin. The obtained nitrogen doped laser-scribed graphene (N-LSG) is binder-free, hierarchical, and conductive. The interconnected carbon network displayed enhanced electrochemical activity with improved heterogeneous electron transfer rate. These features can be attributed to the high conductivity of porous N-LSG (down to 2.8 Omega per square) and its enriched active edge-plane sites. Furthermore, the N-LSG electrodes were decorated with MXene/Prussian blue (Ti3C2Tx/PB) composite via a simple spray-coating process, designed for sensitive detection of analytes. The Ti3C2Tx/PB-modified N-LSG electrodes were functionalized with catalytic enzymes for detecting glucose, lactate, and alcohol. The enzyme/Ti3C2Tx/PB/N-LSG electrodes exhibited remarkably enhanced electrochemical activity toward the detection of these biomarkers with a performance on par with previously reported on chip carbon-based biosensors. Therefore, these materials have high potential for applications in personalized healthcare.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available