TY - GEN
T1 - Eagle-beak nanoantenna for non-blinking single molecule SERS via reversible preconcentration
AU - Hong, Soongweon
AU - Lee, Eric P.
AU - Turner, Brendan W.
AU - Lee, Luke P.
PY - 2011
Y1 - 2011
N2 - Light interaction with nanoantenna causes induces a group oscillation of free electron on nanoantenna, and results in high-amplitude electric and temperature field near nanoantenna. The enhanced electric field (or hot-spot) has been importantly studied due to the potential in simple accomplishment of nonlinear optical phenomena (i.e. multiple-harmonic generation, two-photon absorption, surface-enhanced Raman scattering). Our proposed 'eagle-beak' nanoantenna also generates strongly focused electric field which enables single-molecule level detection in SERS. Furthermore, the thermal and electric field gradients from eagle-beak nanoantenna are designed to drive target molecules toward hot-spots, and are confirmed with numerical simulations. In experiments, eagle-beak nanoantenna showed highly stable and enhanced Raman scattering measurement with an enhancement factor of 10 14. The reversible preconcentration causing the temporal stability of non-blinking, was verified by time-resolvable SERS spectra and fluorescence-based analysis. This study showing controllability of molecular motion by nanoantenna will expand to various applications of optoelectronics, solar cells and biophotonics.
AB - Light interaction with nanoantenna causes induces a group oscillation of free electron on nanoantenna, and results in high-amplitude electric and temperature field near nanoantenna. The enhanced electric field (or hot-spot) has been importantly studied due to the potential in simple accomplishment of nonlinear optical phenomena (i.e. multiple-harmonic generation, two-photon absorption, surface-enhanced Raman scattering). Our proposed 'eagle-beak' nanoantenna also generates strongly focused electric field which enables single-molecule level detection in SERS. Furthermore, the thermal and electric field gradients from eagle-beak nanoantenna are designed to drive target molecules toward hot-spots, and are confirmed with numerical simulations. In experiments, eagle-beak nanoantenna showed highly stable and enhanced Raman scattering measurement with an enhancement factor of 10 14. The reversible preconcentration causing the temporal stability of non-blinking, was verified by time-resolvable SERS spectra and fluorescence-based analysis. This study showing controllability of molecular motion by nanoantenna will expand to various applications of optoelectronics, solar cells and biophotonics.
UR - http://www.scopus.com/inward/record.url?scp=84860429975&partnerID=8YFLogxK
U2 - 10.1109/NMDC.2011.6155330
DO - 10.1109/NMDC.2011.6155330
M3 - Conference contribution
AN - SCOPUS:84860429975
SN - 9781457721397
T3 - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
SP - 156
EP - 158
BT - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
T2 - 2011 IEEE Nanotechnology Materials and Devices Conference, NMDC 2011
Y2 - 18 October 2011 through 21 October 2011
ER -