65 citations · 396 across the 14 of their papers we have counts for
14 papers
Rotational tumbling of Escherichia coli aggregates under shear
R. Portela, P. Patrício, P. L. Almeida +3
Growing living cultures of Escherichia coli bacteria were investigated using real-time in situ rheology and rheo-imaging measurements. In the early stages of growth (lag phase), an…
Living bacteria rheology: population growth, aggregation patterns and cooperative behaviour under different shear flows
P. Patricio, P. L. Almeida, R. Portela +4
The activity of growing living bacteria was investigated using real-time and in situ rheology -- in stationary and oscillatory shear. Two different strains of the human pathogen St…
Real-time characterization of the mechanical behaviour of an actively growing bacterial culture by rheology
R. Portela, P. L. Almeida, P. Patricio +3
The population growth of a Staphylococcus aureus culture was followed by rheological measurements, under steady-state and dynamic shear flows. We observed a rich viscoelastic behav…
Filling and wetting transitions of nematic liquid crystals on sinusoidal substrates
P. Patricio, N. M. Silvestre, C. -T. Pham +1
Close to sinusoidal substrates, simple fluids may undergo a filling transition, in which the fluid passes from a dry to a filled state, where the interface remains unbent but bound…
Undulation instabilities in the meniscus of smectic membranes
J. C. Loudet, P. V. Dolganov, P. Patrício +2
Using optical microscopy, phase shifting interferometry and atomic force microscopy, we demonstrate the existence of undulated structures in the meniscus of ferroelectric smectic-C…
Scaling of the elastic contribution to the surface free energy of a nematic on a sawtoothed substrate
Jose Manuel Romero-Enrique, Chi-Tuong Pham, Pedro Patricio
We characterize the elastic contribution to the surface free energy of a nematic in presence of a sawtooth substrate. Our findings are based on numerical minimization of the Landau…
Modeling Dipolar and Quadrupolar Defect Structures generated by Chiral Islands in Freely-Suspended Liquid Crystal Films
N. M. Silvestre, P. Patricio, M. M. Telo da Gama +4
We report a detailed theoretical analysis of novel quadrupolar interactions observed between islands, which are disk-like inclusions of extra layers, floating in thin, freely suspe…
Capillary bridging and long-range attractive forces in a mean-field approach
D. Andrienko, P. Patricio, O. I. Vinogradova
When a mixture is confined, one of the phases can condense out. This condensate, which is otherwise metastable in the bulk, is stabilized by the presence of surfaces. In a sphere-p…
The Hertz contact in chain elastic collisions
P. Patricio
A theoretical analysis about the influence of the Hertz elastic contact on a three body chain collision is presented. In spite of the elastic character of the collision, the final…
Interaction of colloids with a nematic-isotropic interface
D. Andrienko, M. Tasinkevych, P. Patricio +1
The Landau-de Gennes free energy is used to calculate the interaction between long cylindrical colloids and the nematic-isotropic (NI) interface. This interaction has two contribut…
Forces between elongated particles in a nematic colloid
D. Andrienko, M. Tasinkevych, P. Patricio +2
Using molecular dynamics (MD) simulations we study the interactions between elongated colloidal particles (length to breath ratio > 1) in a nematic host. The simulation results are…
Colloidal interactions in two dimensional nematics
M. Tasinkevych, N. M. Silvestre, P. Patricio +1
The interaction between two disks immersed in a 2D nematic is investigated (i) analitically using the tensor order parameter formalism for the nematic configuration around isolated…
Geometrically-controlled twist transitions in nematic cells
P. Patricio, M. M. Telo da Gama, S. Dietrich
We study geometrically-controlled twist transitions of a nematic confined between a sinusoidal grating and a flat substrate. In these cells the transition to the twisted state is d…
Colloidal dipolar interactions in 2D smectic C films
P. Patricio, M. Tasinkevych, M. M. Telo da Gama
We use a two-dimensional (2D) elastic free energy to calculate the effective interaction between two circular disks immersed in smectic- films. For strong homeotropic anchoring,…