Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 15, Issue 40, Pages 17118-17125Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3cp51952j
Keywords
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Funding
- National Basic Research Program of China [2012CB922001]
- China Government 1000 Plan Talent Program
- China MOE NCET Program
- USTC Startup
- US Air Force Office of Scientific Research (AFOSR)
- DTRA [HDTRA 12221]
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We propose a biosensor by exploiting localized plasmons in graphene and biomolecule adsorption on it. Numerical simulations demonstrate that the sensitivity of such a device can achieve a high value of up to 1697 nm/RIU (refractive index unit) when the wavelength shift at the plasmon resonance is detected. The transparent substrate supporting graphene can be chosen potentially from a wide range of materials including insulators, semiconductors, polymers, and gels. The plasmon resonance wavelength can be tuned with electrostatic doping and/or structure modulation of graphene. Furthermore, the device works in a wide angle range of incident light since the transverse magnetic (TM) polarization is independent of incident angles.
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