Influence of ionic conductivity on in-phase and anti-phase motions of antiferroelectric liquid crystals

Influence of ionic conductivity in polymer-dispersed antiferroelectric liquid crystals

“…The expected free energy by considering the influence of ionic conductivity in the PDAFLC by inclusion of polymeric cross-link chains inter-linked throughout the system as a whole, can be written as [25,26,32]:…”

“…The connecting equation between the rotational viscosity and the antiferroelectric ordering can be written as [25,26,32]:…”

“…Polymer-dispersed antiferroelectric liquid crystals (PDAFLCs) in polymer matrix have been studied extensively in experimental work [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], but till now, a limited number of works has been done in their theoretical understandings [21][22][23][24][25][26][27][28][29][30][31][32]. When the molecules or constituents of AFLC dispersed in polymer matrix, the accumulated charge density on each layer of AFLC interacts with the polymer chains as well as the free volumes of polymer matrix, and also encounters with the mobility of charges of AFLC [25,26]. Since the reported information from literature informs about the existence of in-phase and anti-phase motions connected with the movement of chirality, a detailed study of PDAFLC influenced by ionic conductivity or the accumulation of charges on the layer of AFLC needs to be done [25,26].…”

“…When the molecules or constituents of AFLC dispersed in polymer matrix, the accumulated charge density on each layer of AFLC interacts with the polymer chains as well as the free volumes of polymer matrix, and also encounters with the mobility of charges of AFLC [25,26]. Since the reported information from literature informs about the existence of in-phase and anti-phase motions connected with the movement of chirality, a detailed study of PDAFLC influenced by ionic conductivity or the accumulation of charges on the layer of AFLC needs to be done [25,26]. Since the dielectric functions are associated with the orientation of dipole moments for a particular mode of fluctuation, so a detailed information of dielectric functions, such as dielectric constant, dielectric loss and dielectric strength for both inphase and anti-phase motions are reported in this work by considering an appropriate Landau free energy.…”

“…Since the dielectric functions are associated with the orientation of dipole moments for a particular mode of fluctuation, so a detailed information of dielectric functions, such as dielectric constant, dielectric loss and dielectric strength for both inphase and anti-phase motions are reported in this work by considering an appropriate Landau free energy. Two collective modes associated with the phase fluctuations of tilt angle in-phase and anti-phase have been studied, till now both experimentally and theoretically, earlier [12][13][14][19][20][21][22][23][24][25][26][27][28][29][30][31][32]. Although a few experimental findings exists I have tried to incorporate a theoretical model to incorporate with the existing experimental findings as well for establishing a future experimental motivation.…”