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CSIC ORGANIZACIÓN CENTROS BECAS OPOSICIONES

Consejo Superior de Investigaciones Científicas

Universidad de Zaragoza


Selección de temas de investigación / Scientific highlights

Plasmons on Separate Paths

C. R. Williams, M. Misra, S. R. Andrews, S. A. Maier, S. Carretero-Palacios, S. G. Rodrigo, F. J. Garcia-Vidal, and L. Martin-Moreno
Appl. Phys. Lett. 2010, 96, 011101

Metamaterial calculated dispersion curves and maps of the absolute electric field strength at fc (TE 11) and fc (TEM)

In the quest for faster signal processing speeds there are essentially two approaches: shrink the size of the circuitry, or use light rather than electronic current as the information carrier. In the former approach, the operating frequency faces a fundamental upper limit of several tens of GHz due to the properties of the materials required in the design of current-based devices. Light, in contrast, offers the ultimate speed, but requires circuit size to remain on the order of its roughly micrometer-scale wavelength.

Surface plasmons— light-induced electronic excitations near the surface of a metal/dielectric interface—offer the possibility of exploiting the speed and size virtues of the two approaches. However, exciting the plasmons is usually a resonant phenomenon, meaning that only one kind of plasmon can be excited at a particular wave-length.

Williams et al. present a technique based on a designed array of annular holes on a textured copper surface that allows two tightly bound THz-induced plasmon modes to propagate independently, thus providing potential for a number of applications in chemical and biological sensing, security screening, and communications.



Non-Covalent Immobilization of Enantioselective Catalysts

José M. Fraile, José I. García and José A. Mayoral
Chem. Rev. 2009, 109, 360–417

The most convenient strategy to prepare chiral heterogeneous catalysts is the immobilization of chiral homogeneous catalysts, and the most used method to immobilize chiral complexes is the formation of a covalent bond between the solid support and the chiral ligand.

One important drawback of this method is the need for an additional functionalization of the chiral ligand.

The objective of this review is to bring together all the knowledge about methods of immobilization applied to enantioselective catalysts, that don’t require the covalent link of the chiral ligand to a solid support, either organic (polymeric) or inorganic.

These methods are quite underestimated, but they offer several advantages: many of them don’t require modification of the known, commercially available, chiral ligands used in solution chemistry; many of these methods are simple and efficient, precluding any important supplementary cost; and there exist possibilities to control the stereochemical outcome of the catalytic process due to the relative position of the complex with respect to the support.




Consultas y sugerencias en la dirección de correo electrónico webicma
 
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CONVOCATORIAS AYUDAS

Convocatoria del CSIC de becas de Introducción a la Investigación

Convocatoria del CSIC. Ayudas JAE Predoctorales

Convocatoria de Becas Ibercaja de Investigación

Convocatoria CYTED de Redes y Proyectos con Iberoamérica

Solicitudes de estancias de estudiantes

Convocatoria JAE de becas de introducción a la Investigación

Convocatoria del 2010. Proyectos de investigación del PN

Convocatoria de los Programas de "Becas MAEC-AECID"

Convocatoria de préstamos para estudios de máster o doctorado

Convocatoria del CSIC de Proyectos Intramurales Especiales

Convocatoria 2009 de infraestructuras científico-tecnológicas

Convocatoria del CSIC de movilidad

OFERTAS DE EMPLEO

Puestos de gestión y vigilancia tecnológica

3 Becas asociadas a contrato de investigación BSH - UNIZAR

NOTICIAS


 
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