GFET-S20 (Die size 10 mm x 10 mm) - Processed in Clean Room Class 1000
The GFET S-20 chip from Graphenea is designed for measurements in liquid medium. The new version provides 12 graphene devices, with encapsulation on the metal pads to avoid degradation and reduce leakage currents, and the probe pads located near the periphery of the chip. It also includes a non-encapsulated electrode at the center of the chip, which allows liquid gating without the need of an external gate electrode.
Typical Specifications
- · Growth method: CVD synthesis
- · Graphene transfer: Polymer assisted transfer
- · Chip dimensions: 10 mm x 10 mm
- · Substrate: Si/SiO2
- · Substrate thickness: 675 μm
- · Resistivity of Si substrate: 1-10 Ω.cm
- · Gate oxide thickness: 90 nm
- · Metallization: 50nm Au-based Contacts
- · Encapsulation: 50 nm Al2O3
- · Chip dimensions: 10 mm x 10 mm
- · Number of GFETs per chip: 12
- · Optical Yield: ≥75
- · Average field-effect mobility (back gating): >1000 cm2/V.s
- · Average Dirac point (back gating): <25 V
- · Average Dirac point (liquid gating): <1 V
Absolute maximum ratings
- · Maximum gate-source voltage (liquid gating in PBS): ± 2V
- · Maximum gate-source voltage (back gating): ± 50V
- · Maximum temperature rating: 150 °C
- · Maximum drain-source current density: 107A.cm-2
Quality control
All our samples are subjected to a rigorous QC in order to ensure a high quality products.
- · Optical Microscopy inspection of all the devices
- · Raman spectroscopy of each fabrication batch
- · Electrical characterisation (back gating and liquid gating) of each fabrication batch
- · AFM of each fabrication batch
Applications
Graphene field-effect transistors (GFETs) have unprecedented sensitivity to the surrounding environment and is an ideal transducer for a variety of sensing applications. Depending on the application, GFETs can be tuned to be sensitive only to the stimulus of interest and have shown breakthrough performance in areas such as photosensing, magnetic sensing and biosensing.
Publications
"Graphene Sensor Arrays for Rapid and Accurate Detection of Pancreatic Cancer Exosomes in Patients’ Blood Plasma Samples"
https://doi.org/10.1021/acsnano.3c01812
"Graphene‑based field‑effect transistors for biosensing: where is the field heading to?"
https://doi.org/10.1007/s00216-023-04760-1
"Detection of Glial Fibrillary Acidic Protein in Patient Plasma Using On-Chip Graphene Field-Effect Biosensors, in Comparison with ELISA and Single-Molecule Array"
https://doi.org/10.1021/acssensors.1c02232
"Detection of an IL-6 Biomarker Using a GFET Platform Developed with a Facile Organic Solvent-Free Aptamer Immobilization Approach"
DOI:10.1109/ACCES.2020.2994611
"High resolution potassium sensing with large area graphene field-effect transistors"
https://doi.org/10.1016/j.snb.2019.04.032
GFET-S20 Data Sheet 
