Orientationally correlated colloidal polycrystals without long-range positional order (2008)
Arcos, C., Kumar, K., González-Viñas, W., Sirera, R., Poduska, K.M., Yethiraj, A.
We probe the local and global structure of spin-coated colloidal crystals via laser diffraction measurements and scanning electron and atomic force microscopies, and find that they are unique...
Fabrication and characterization of silver inverse opals, Sensors and ActuatorsB (2007)
Pérez, N., Hüls, A., Puente, D., González-Viñas, W.
Artificial structures with two- or three-dimensional arrangement of materials (photonic crystals) are being considered in recent days a key structure for the fabrication of advanced optical devices...
On the parameters influencing the deposition of polystyrene colloidal crystals (2007)
Yoldi, M., Arcos, M.C., Paulke, B.R., Sirera, R., González-Viñas, W., Görnitz, E.
Colloidal crystals of polystyrene particles of 1.0, 1.4 and 2.8 μm diameter have been prepared by vertical deposition. The influence of parameters such as temperature, particle size and...
The birth of defects in pattern formation: testing of the Kibble-Zurek mechanism (2007)
Casado, S., González-Viñas, W., Boccaletti, S., Ramazza, P.L., Mancini, H.L.
Abstract. The extension of the cosmological mechanism of Kibble to second order phase transitions in condensed matter systems by Zurek, can be further generalized to bifurcations of...
Electrophoretic deposition of colloidal crystals assisted by hydrodynamic flows (2006)
Yoldi, M., González-Viñas, W., Arcos, M.C., Sirera, R.
Latex-based colloidal crystals have been grown by electrophoretic deposition. The deposition has been assisted by hydrodynamic von K´arm´ an-like flows, which lead to quantitative improvements. It...
Testing the Kibble-Zurek mechanism in Rayleigh-Bénard convection (2006)
Casado, S., González-Viñas, W., Mancini, H.
We report experimental evidence of the fact that, in an emerging Rayleigh-Bénard structure, the density of defects which appear scales as a power law in the rate of change of the control parameter....
Defects dynamics during a quench in a Bénard-Marangoni convection system (2001)
González-Viñas, W., Casado, S., Burguete, J., Mancini, H.L., Boccaletti, S.
We report experimental evidence of defect formation and dynamics in a symmetry breaking transition for a conduction{convection B enard{Marangoni system. As opposite to the behavior of perfect...
Topological defects after a quench in a Bénard-Marangoni convection system (2001)
Casado, S., González-Viñas, W., Mancini, H.L., Boccaletti, A.
We report experimental evidence of the fact that, in a Be´nard-Marangoni conduction-convection transition, the density of defects in the emerging structure scales as a power law in the quench time...
Order parameter fragmentation after a symmetry-breaking transition (1999)
Ducci, S., Ramazza, P.L., González-Viñas, W., Arecchi, F.T.
As a nonlinear optical system consisting of a Kerr medium inserted in a feedback loop is exposed to a light intensity growing linearly from below to above the threshold for pattern formation, the...