3 April 2015 Dynamics of plasmon in graphene oxide
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Dynamic effects of plasmon such as scattering with defect boundaries and oxygen impurities in the graphene oxide are investigated. Study of plasmon dynamics helps in understanding electronic, opto-electronic and biological applications of graphene based nanostructures. Tuning or control over such applications is made possible by graphene nanostructure engineering. We have modeled defects with increased smoothing of defect edge in graphene keeping area of the defect constant. Scattering of plasmons in graphene with defects is modeled using an electromagnetic field coupled inter-atomic potential approach with finite element discretization of the atomic vibrational and electromagnetic field degrees of freedom. Our calculations show π+σ plasmon red shifting under sharp defect edges whereas π plasmon show high extinction efficiency. Strong localization of electric fields near the sharp defect edges is observed. Observations on plasmons and its dynamics draws attention in designing novel optoelectronic devices and binders for bio-molecules.
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Brahmanandam Javvaji, Brahmanandam Javvaji, D. Roy Mahapatra, D. Roy Mahapatra, S. Raha, S. Raha, "Dynamics of plasmon in graphene oxide", Proc. SPIE 9434, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2015, 94340M (3 April 2015); doi: 10.1117/12.2085720; https://doi.org/10.1117/12.2085720

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