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    • Thesis & Report, BSc (Electrical and Electronic Engineering)
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    •   BracU IR
    • School of Engineering (SoE)
    • Department of Electrical and Electronic Engineering (EEE)
    • Thesis & Report, BSc (Electrical and Electronic Engineering)
    • View Item
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    Humidity sensor using surface adsorbed channel modulated GrapheneNanoribbon : NEGF approach

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    Date
    2014-08
    Publisher
    BRAC University
    Author
    Shakil, Shifur Rahman
    Fatema Tuz Zohra
    Pramanik, Parna
    Tushar, Raihanul Islam
    Metadata
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    URI
    http://hdl.handle.net/10361/3625
    Abstract
    Flexible, highly sensitive and low cost humidity sensors are highly enviable in future generation sensor technology. As a result of recent year’s research conducted concerning the applicability in gas and humidity sensors, graphene is reported to be an appropriate sensing material for this purpose. The inimitable structural, mechanical and electronic properties of graphene has attracted extensive attention of scientists, therefore the successful synthesis of novel two-dimensional (2D) graphene and the experimental observation of Dirac fermions in unpatterned graphene devices has been increasing rapidly. This thesis describes simulation based study of humidity sensing ability of patterned graphene adsorbing vapour (H2O) and investigate electronic and quantum transport properties of these system such as Device Density of States ( DDOS ), Electrostatic Effective Potential (EDP), Conductivity (G) and Current-Voltage (I-V) characteristics. Transport simulation is based on Non-equilibrium Green’s Function (NEGF) formalism. In our thesis, we have considered three cases such as semiconducting grapheme nanoribbon (N=10), metallic grapheme nanoribbon (N=11) and cascade hetero-graphene nanoribbon, where sensing medium is semiconducting GNR (N=10) and contact is metallic GNR (N=11) to realize the effect of H2O adsorption on it. We have calculated the highest number of H2O molecules that can be absorbed on corresponding to the area of GNR to get maximum current. Later on we propose a simple schematic model to characterize device performance which incorporates the effect of metal contact resistance with GNR.
    Keywords
    Electrical and electronic engineering; Graphene Nanoribbon; Non-equilibrium Green’s Function
     
    Description
    This thesis report is submitted in partial fulfillment of the requirements for the degree of Bachelor of Science in Electrical and Electronic Engineering, 2014.
     
    Cataloged from PDF version of thesis report.
     
    Includes bibliographical references (page 49).
    Department
    Department of Electrical and Electronic Engineering, BRAC University
    Collections
    • Thesis & Report, BSc (Electrical and Electronic Engineering)

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