Biomedical applications adapt Nano technology-based transistors as a key component in the biosensors for diagnosing life threatening diseases like Covid-19, Acute myocardial infarction (AMI), etc. The proposed work introduces new biosensor, based on Graphene Field Effect Transistor (GFET), which is used diagnosis of Myoglobin (Mb) human blood. Graphene-based are faster, more precise, stronger, ...

We directly image hot spot formation in functioning mono- and bilayer graphene field effect transistors (GFETs) using infrared thermal microscopy. Correlating with an electrical-thermal transport model provides insight into carrier distributions, fields, and GFET power dissipation. The hot spot corresponds to the location of minimum charge density along the GFET; by changing the applied bias, t...

Graphene is an attention-grabbing material in electronics, physics, chemistry, and even biology because of its unique properties such as high surface-area-to-volume ratio. Also, the ability of graphene-based materials to continuously tune charge carriers from holes to electrons makes them promising for biological applications, especially in lipid bilayer-based sensors. Furthermore, changes in c...

SPICE has been the corner stone of integrated circuit simulation since the 1970s. The device-level options that are available for SPICE/analog simulators to simulate a circuit netlist are typically compact models and/or Verilog-A structural and behavioral models. Though these simulations are very accurate, for large and complex circuits/systems they are extremely slow and even computationally i...

Recent intense electrical and optical studies of graphene have pushed the material to the forefront of optoelectronic research. Of particular interest is the few terahertz (THz) frequency regime where efficient light sources and highly sensitive detectors are very challenging to make. Here we present THz sources and detectors made with graphene field effect transistors (GFETs) enhanced by a dou...

We propose an explicit small-signal graphene field-effect transistor (GFET) parameter extraction procedure based on a charge-based quasi-static model. The dependence of the parameters both gate voltage and frequency is precisely validated by high-frequency (up to 18 GHz) on-wafer measurements from 300 nm device. These are studied simultaneously, in contrast other works which focus exclusively f...

Graphene-based devices show good transfer characteristics, which depend upon the surface morphology of material and substrate. During fabrication device, substrate is disturbed inappropriately by contamination. In present study, monolayer Graphene Field Effect Transistor (GFET) has been driven with hydrophobic Hexamethyl Disilazane (HMDS) layer. The HMDS layer dehydrated before after exfoliated...

Graphene-metal contact resistance limits the performance of graphene-based electrical devices. In this work, we have fabricated both graphene field-effect transistors (GFET) and transfer length measurement (TLM) test devices with titanium contacts. The purpose of this work is to compare the contact resistances that can be numerically extracted from the GFETs and measured from the TLM structures...

Graphene field-effect transistors (GFETs) are suitable building blocks for high-performance electrical biosensors, because graphene inherently exhibits a strong response to charged biomolecules on its surface. However, achieving ultralow limit-of-detection (LoD) is limited by sensor time and screening effect. Herein, we demonstrate that the detection limit of GFET biosensors can be improved sig...