Details

Autor(en) / Beteiligte

• Podila, Ramakrishna
• Chen, Pengyu
• Reppert, Jason
• Rao, Apparao M.
• Ke, Pu Chun

Titel

Biomolecular sensing using gold nanoparticle–coated ZnO nanotetrapods

Ist Teil von

• Journal of materials research, 2011-09, Vol.26 (17), p.2328-2333

Ort / Verlag

New York, USA: Cambridge University Press

Erscheinungsjahr

2011

Quelle

Springer journals

Beschreibungen/Notizen

• Gold nanoparticle–coated ZnO tetrapods have been utilized as a substrate for the detection of fluorescently labeled protein tetramethylrhodamine isothiocyanate bovine serum albumin and phospholipid 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine-N-(Lissamine rhodamine B sulfonyl) down to the concentrations of 15 pM and 79 nM, respectively. Our detection scheme is based on enhanced fluorescence excitation of the biomolecular analytes by the surface plasmon polaritons of gold nanoparticles coated on the ZnO tetrapod whiskers. This enhanced excitation is confirmed using COMSOL Multiphysics, where the optical near field is shown to be dependent on the coating density of the gold nanoparticles and branching of the ZnO nanostructures.