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Smectic-A and Smectic-C Phases and Phase Transitions in Liquid Crystal-Aerosil Gels
B. Freelon, M. Ramazanoglu, P. J. Chung +3
High-resolution X-ray scattering studies of the nonpolar thermotropic liquid crystal 4-n-pentylphenylthiol-4'-n-octyloxybenzoate (\bar{8}S5) in aerosil gel nano-networks reveal tha…
High resolution x-ray study of nematic-smectic-A and Smectic-A-reentrant nematic transitions in liquid crystal+aerosil gels
M. Ramazanoglu, S. Larochelle, C. W. Garland +1
We have studied the effects of quenched random disorder created by dispersed aerosil nanoparticle gels on the nematic to smectic-A (N-SmA) and smectic-A to reentrant nematic (SmA-…
Calorimetric study of the nematic to smectic-\textit{A} and smectic-\textit{A} to smectic-\textit{C} phase transitions in liquid-crystal+aerosil dispersions
A. Roshi, G. S. Iannacchione, P. S. Clegg +2
A high-resolution calorimetric study has been carried out on nano-colloidal dispersions of aerosils in the liquid crystal 4-\textit{n}-pentylphenylthiol-4'-\textit{n}-octyloxybenzo…
First order isotropic - smectic-A transition in liquid crystal-aerosil gels
M. K. Ramazanoglu, P. S. Clegg, R. J. Birgeneau +3
The short-range order which remains when the isotropic to smectic-A transition is perturbed by a gel of silica nanoparticles (aerosils) has been studied using high-resolution synch…
Evolution of the isotropic to nematic phase transition in octyloxycyanobiphenyl+aerosil dispersions
A. Roshi, G. S. Iannacchione, P. S. Clegg +1
High-resolution ac-calorimetry has been carried out on dispersions of aerosils in the liquid crystal octyloxycyanobiphenyl (8OCB) as a function of aerosil concentration and tempera…
Smectic ordering in liquid crystal - aerosil dispersions II. Scaling analysis
Germano S. Iannacchione, Sungil Park, Carl W. Garland +2
Liquid crystals offer many unique opportunities to study various phase transitions with continuous symmetry in the presence of quenched random disorder (QRD). The QRD arises from t…