Graphene based Solution Gated Field-Effect Transistors (SGFET) for biosensors

This thesis is submitted in partial fulfilment of the requirements for the degree of Bachelor of Science in Electrical and Electronic Engineering, 2018.Catalogued from PDF version of thesis.Includes bibliographical references (page 49-52).Graphene based SGFETs offer several advantages over other sensing devices in aqueous environment due to the exceptional properties of Graphene. Properties of Graphene such as high tunability, sensitivity, rigidity, flexibility, chemical stability and bio-inertness plays a very crucial role in biosensors by not inducing scars and damages in the surrounding tissues. Also, being only one atom thick, allows the fabrication of fully flexible high performance Graphene transistor possible. We will study the various parameters, low frequency noise characteristics in Graphene based SGFETs and observe the I-V characteristic along with the shifts of the Dirac point which will help us to identify charged membranes upon Graphene. We will be working with positively charged DOTAP lipid bilayer membrane upon Graphene due to its viability with biosensors. This will give us the basis for understanding the mechanism of charged molecules sensing using Graphene device.Abdullah Hossain SarkerMaisha TabassumNafis ErfanB. Electrical and Electronic Engineerin