Journal article
Spectroscopy, imaging, and modeling of individual gold decahedra
J Rodríguez-Fernández, C Novo, V Myroshnychenko, AM Funston, A Sánchez-Iglesias, I Pastoriza-Santos, J Pérez-Juste, FJ García de Abajo, LM Liz-Marzán, P Mulvaney
Journal of Physical Chemistry C | AMER CHEMICAL SOC | Published : 2009
DOI: 10.1021/jp907646d
Abstract
Gold nanodecahedra (pentagonal bipyramids) exhibit striking optical properties spanning the visible and near-IR spectral regions, which together with a high electric-field enhancement at their tips, makes them very promising materials for sensing-related applications. The effective design of biosensors based on these nanocrystals requires a detailed investigation and understanding of their surface plasmon resonances. For that purpose, we have used correlated electron microscopy imaging and optical dark-field spectroscopy on individual decahedra to investigate their size and orientation-dependent optical properties at the single particle level. We have also investigated the effects of tip tru..
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Awarded by Spanish MICINN
Awarded by EU
Funding Acknowledgements
J.R.-F. acknowledges the Spanish MEC for an FPU scholarship. L.M.L.-M. acknowledges funding from the Spanish MICINN (PC12005-A7-0075, MAT2007-62696 and Consolider Ingenio NANOBIOMED) and the EU (NANODIRECT, grant no. CP-FP 213948-2). F.J.G.A. acknowledges funding from the Spanish MICINN (MAT2007-66050 and Consolider NanoLight.es) and the EU (NMP4-2006-016881-SPANS and NMP4-SL-2008-213669-ENSEMBLE). P.M. acknowledges funding through the Australian ARC Discovery Projects and Federation Fellow grant schemes via CG 110036 and FF Grant 0561486. A.M.F. acknowledges the support of The University of Melbourne through a Melbourne Research Office Fellowship. The authors thank Sergey Rubanov for hssistance with FIB/SEM.