INFIQC   05475
INSTITUTO DE INVESTIGACIONES EN FISICO- QUIMICA DE CORDOBA
Unidad Ejecutora - UE
artículos
Título:
Excitation-Transfer Plasmonic Nano-Sensors Based on Dynamical Phase Transitions
Autor/es:
RAUL A. BUSTOS MARUN; EDUARDO A. CORONADO; HORACIO M. PASTAWSKI
Revista:
JOURNAL OF PHYSICAL CHEMISTRY C
Editorial:
AMER CHEMICAL SOC
Referencias:
Lugar: Washington; Año: 2012 vol. 116 p. 18937 - 18943
ISSN:
1932-7447
Resumen:
Dynamical phase transitions (DPTs) describe the abrupt change in the
dynamical properties of open systems when a single control parameter is
slightly modified. Recently, we found that this phenomenon is also
present in a simple model of a linear array of metallic nanoparticles in
the form of a localized?delocalized DPT. In this work we show how to
take advantage of DPTs to design a new kind of plasmonic sensor which
should own some unique characteristics. For example, if it were used as a
plasmon ruler, it would not follow the so-called universal plasmon
ruler equation [Nano Letters2007, 7, 2080?2088], exhibiting instead an on?off
switching feature. This basically means that a signal should be
observed only when the control/measured parameter, that is, a distance
in the case of plasmon rulers, has a very precise and predetermined
value. Here, we demonstrate their feasibility and unique
characteristics, showing that they combine high sensitivity with this
on?off switching feature in terms of different distances and local
dielectric constants. This property has the potentiality to be used in
the design of new plasmonic devices such as plasmonic circuits activated
only under certain environmental cond