B R Ratna
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Explore the profile of B R Ratna including associated specialties, affiliations and a list of published articles.
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15
Citations
91
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Recent Articles
1.
Spillmann C, Naciri J, Ratna B, Selinger R, Selinger J
J Phys Chem B
. 2016 Apr;
120(26):6368-72.
PMID: 27096378
As an approach for electrically controllable actuators, we prepare elastomers of chiral smectic-A liquid crystals, which have an electroclinic effect, i.e., molecular tilt induced by an applied electric field. Surprisingly,...
2.
Bapat P, Shankar Rao D, Prasad S, Naciri J, Ratna B
J Phys Chem B
. 2011 Aug;
115(35):10425-30.
PMID: 21809816
In contrast to the exhaustive measurements of various properties of ferroelectric liquid crystals at atmospheric pressure, only a few studies exist at high pressure. Here we report the isobaric thermal...
3.
Prasad S, Shankar Rao D, Sridevi S, Naciri J, Ratna B
J Phys Condens Matter
. 2011 Feb;
23(10):105902.
PMID: 21339585
Dielectric measurements have been made on three organosiloxane liquid crystal compounds exhibiting a smectic A (SmA) to smectic C* (SmC*) transition, the SmA phase being of the de Vries type....
4.
Brandow S, Turner D, Ratna B, Gaber B
Biophys J
. 2009 May;
64(3):898-902.
PMID: 19431878
The atomic force microscope (AFM) was used to structurally modify supported lipid bilayers in a controlled quantitative manner. By increasing the force applied by the AFM tip, lipid was removed...
5.
Prasad S, Shankar Rao D, Sridevi S, Lobo C, Ratna B, Naciri J, et al.
Phys Rev Lett
. 2009 Apr;
102(14):147802.
PMID: 19392483
X-ray, electrical, electro-optical, and dielectric studies in the de Vries smectic A (SmA) phase of organosiloxane derivatives exhibit features surprisingly different from that of a conventional SmA phase. The switching...
6.
Selinger J, Ratna B
Phys Rev E Stat Nonlin Soft Matter Phys
. 2004 Dec;
70(4 Pt 1):041707.
PMID: 15600425
When liquid-crystalline elastomers pass through the isotropic-nematic transition, the orientational order parameter and the elastic strain vary rapidly but smoothly, without the expected first-order discontinuity. This broadening of the phase...
7.
Chatterji A, Ochoa W, Paine M, Ratna B, Johnson J, Lin T
Chem Biol
. 2004 Jun;
11(6):855-63.
PMID: 15217618
Cowpea mosaic virus (CPMV) is a robust, icosahedrally symmetric platform successfully used for attaching a variety of molecular substrates including proteins, fluorescent labels, and metals. The symmetric distribution and high...
8.
Collings P, Ratna B, Shashidhar R
Phys Rev E Stat Nonlin Soft Matter Phys
. 2003 Mar;
67(2 Pt 1):021705.
PMID: 12636698
Measurements of the orientational order parameter of dissolved dichroic dyes are reported for two smectic-A liquid crystals that tilt in the presence of an in-plane electric field without any decrease...
9.
Selinger J, Jeon H, Ratna B
Phys Rev Lett
. 2002 Dec;
89(22):225701.
PMID: 12485082
In liquid-crystalline elastomers, the nematic order parameter and the induced strain vary smoothly across the isotropic-nematic transition, without the expected first-order discontinuity. To investigate this smooth variation, we measure the...
10.
Xu J, Selinger R, Selinger J, Ratna B, Shashidhar R
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
. 2002 Apr;
60(5 Pt A):5584-90.
PMID: 11970435
Using Monte Carlo simulation methods, we explore the role of molecular shape in the phase behavior of liquid crystals and the electroclinic effect. We study a "bent-rod" mesogen shaped like...