A molecular dynamics study of ferroelectric nanoparticles immersed in a nematic liquid crystal

Pereira, Maria S. S.; Canabarro, Askery; Oliveira, I. N. de; Lyra, M. L.; Mirantsev, L. V.

doi:10.1140/epje/i2010-10553-y

Cited by 21 publications

(22 citation statements)

References 32 publications

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“…The system's reduced temperature was kept constant at T * = k B T /ε iso = 0.9, where T is the absolute temperature and k B is the Boltzmann constant. The value prescribed for T * is well below the bulk nematic-to-isotropic transition temperature, T * NI = 1.05, obtained for a similar model system [21].…”

Section: A Molecular Dynamics Simulationsmentioning

confidence: 55%

Lifting ordered surfaces: Ellipsoidal nematic shells

Mirantsev¹,

Sonnet²,

Virga³

2018

Phys. Rev. E

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When a material surface is functionalized so as to acquire some type of order, functionalization of which soft condensed matter systems have recently provided many interesting examples, the modeler faces an alternative. Either the order is described on the curved, physical surface where it belongs, or it is described on a flat surface that is unrolled as preimage of the physical surface under a suitable height function. This paper applies a general method that pursues the latter avenue by lifting whatever order tensor is deemed appropriate from a flat to a curved surface. We specialize this method to nematic shells, for which it also provides a simple but perhaps convincing interpretation of the outcomes of some molecular dynamics experiments on ellipsoidal shells.

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Section: A Molecular Dynamics Simulationsmentioning

confidence: 55%

Lifting ordered surfaces: Ellipsoidal nematic shells

Mirantsev¹,

Sonnet²,

Virga³

2018

Phys. Rev. E

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“…In order to understand this phenomenon and predict how to enhance it further, we investigate the isotropic-nematic transition using the free energy of Eq. (16).…”

Section: Transition Temperaturementioning

confidence: 99%

Maier-Saupe-type theory of ferroelectric nanoparticles in nematic liquid crystals

Lopatina

Selinger

2011

Phys. Rev. E

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Several experiments have reported that ferroelectric nanoparticles have drastic effects on nematic liquid crystals-increasing the isotropic-nematic transition temperature by about 5 K, and greatly increasing the sensitivity to applied electric fields. In a recent paper [L. M. Lopatina and J. V. Selinger, Phys. Rev. Lett. 102, 197802 (2009)], we modeled these effects through a Landau theory, based on coupled orientational order parameters for the liquid crystal and the nanoparticles. This model has one important limitation: Like all Landau theories, it involves an expansion of the free energy in powers of the order parameters, and hence it overestimates the order parameters that occur in the low-temperature phase. For that reason, we now develop a new Maier-Saupetype model, which explicitly shows the low-temperature saturation of the order parameters. This model reduces to the Landau theory in the limit of high temperature or weak coupling, but shows different behavior in the opposite limit. We compare these calculations with experimental results on ferroelectric nanoparticles in liquid crystals.

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“…A distribution of published journal papers along with major research highlights over the 2003–2017 periods are schematically shown in Figure 2 (published papers: 2003—[ 15 , 16 , 17 ]; 2004—[ 18 , 19 ]; 2005—[ 20 , 21 , 22 , 23 , 24 ]; 2006—[ 25 , 26 , 27 , 28 ]; 2007—[ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ]; 2008—[ 37 , 38 , 39 ]; 2009—[ 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]; 2010—[ 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ]; 2011—[ 60 , 61 , 62 , 63 , 6...…”

Section: Liquid Crystals Doped With Ferroelectric Nanoparticles: Amentioning

confidence: 99%

Ferroelectric Nanoparticles in Liquid Crystals: Recent Progress and Current Challenges

Garbovskiy

Glushchenko

2017

Nanomaterials

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The dispersion of ferroelectric nanomaterials in liquid crystals has recently emerged as a promising way for the design of advanced and tunable electro-optical materials. The goal of this paper is a broad overview of the current technology, basic physical properties, and applications of ferroelectric nanoparticle/liquid crystal colloids. By compiling a great variety of experimental data and discussing it in the framework of existing theoretical models, both scientific and technological challenges of this rapidly developing field of liquid crystal nanoscience are identified. They can be broadly categorized into the following groups: (i) the control of the size, shape, and the ferroelectricity of nanoparticles; (ii) the production of a stable and aggregate-free dispersion of relatively small (~10 nm) ferroelectric nanoparticles in liquid crystals; (iii) the selection of liquid crystal materials the most suitable for the dispersion of nanoparticles; (iv) the choice of appropriate experimental procedures and control measurements to characterize liquid crystals doped with ferroelectric nanoparticles; and (v) the development and/or modification of theoretical and computational models to account for the complexity of the system under study. Possible ways to overcome the identified challenges along with future research directions are also discussed.

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A molecular dynamics study of ferroelectric nanoparticles immersed in a nematic liquid crystal

Cited by 21 publications

References 32 publications

Lifting ordered surfaces: Ellipsoidal nematic shells

Lifting ordered surfaces: Ellipsoidal nematic shells

Maier-Saupe-type theory of ferroelectric nanoparticles in nematic liquid crystals

Ferroelectric Nanoparticles in Liquid Crystals: Recent Progress and Current Challenges

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