Versatile nonlinear-optical materials based on mesomorphic metal alkanoates: design, properties, and applications

Klimusheva, G. V.; Mirnaya, T. A.; Garbovskiy, Yuriy

doi:10.1080/21680396.2015.1030461

Cited by 35 publications

(24 citation statements)

References 154 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Ionic conductivity negatively affects LC device performance, leading to slow response, a reduction of the voltage holding ratio, and image quality degradation. Despite the negative effect of ionic contamination in display techniques, LCs with high ionic conductivity may be used in non-display applications [18–19]. Although modern LC mixtures are highly purified, uncontrolled contamination during utilization can occur [20].…”

Section: Resultsmentioning

confidence: 99%

Impact of titanium dioxide nanoparticles on purification and contamination of nematic liquid crystals

Shcherbinin¹,

Konshina²

2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

We have investigated the impact of titanium dioxide nanoparticles on the ionic contamination of liquid crystals. Nematic liquid crystals with high and low initial ionic contamination have been examined. It has been shown that titanium dioxide nanoparticles reduced the ion density of liquid crystals with high initial ionic contamination from 134.5 × 1012 cm−3 to 63.2 × 1012 cm−3. In the case of liquid crystals with low initial ionic contamination, the nanoparticles led to an insignificant increase of ion density from 19.8 × 1012 cm−3 to 25.7 × 1012 cm−3.

show abstract

Section: Resultsmentioning

confidence: 99%

Impact of titanium dioxide nanoparticles on purification and contamination of nematic liquid crystals

Shcherbinin¹,

Konshina²

2017

Beilstein J. Nanotechnol.

View full text Add to dashboard Cite

show abstract

“…The supra-non-linear photorefractive response has been successfully observed in carbon nanotube-and C60-doped nematic LC systems [87][88][89]. The functional nanoparticles are expected to not only enhance the non-linearities of LC materials, but also introduce novel non-linear optical mechanisms for self-activated laser protection in the time scales and absorption wavelengths not possible with the LC hosts [90]. Interestingly, silver (Ag) and gold (Au) nanoparticle-doped nematic LC films were able to exhibit photoinduced reorientation or refractive index changes [91][92][93][94], thus enabling the efficient all-optical switching for continuous-wave lasers [95].…”

Section: Nano-dispersed Nematic Liquid Crystalsmentioning

confidence: 95%

Self-activating liquid crystal devices for smart laser protection

Wang

2016

Liquid Crystals

View full text Add to dashboard Cite

Lasers are now extensively used in a multitude of optical devices and photonic systems spanning from sensing, communication, entertainment, medical surgery to military applications. Direct accidental or intentional exposures to high power lasers may lead to severe temporary or even permanent harm of human eye, skin, or optical sensors. The effective laser protection and shielding are currently not only a subject of scientific research but also a potential public safety issue, therefore there is an urgent need to develop the intelligent laser protection devices for keeping human eyes, optical sensors, and other sensitive components from these unintended or intended damages by laser radiations without warning. Self-activating liquid crystal devices undoubtedly represent such an elegant example because they could be autonomously activated to block or attenuate the lasers when the laser intensity is higher than a maximum permissible exposure value. This review is devoted to summarising the up-to-date significant advances of selfactivating liquid crystal devices for potential smart laser protection, including twist-aligned nematic liquid crystal devices, liquid crystal cored waveguide fibre arrays, and photovoltaic/ pyroelectric-hybridised liquid crystal devices. Finally, the review concludes with the perspectives and challenges for the future development of self-activating liquid crystal devices. It is anticipated that this glimpse and further endeavours in the emerging field will help the researchers from different backgrounds towards the fabrication of highly efficient laser protection devices, their real-world widespread applications and beyond. ARTICLE HISTORY

show abstract

“…There are also electro-optical devices like optical shutters and smart windows which rely on ions in liquid crystals [5,6]. Despite, the negative effect of ionic contamination in display techniques, LCs with high ionic conductivity may be used in non-display applications [20,21]. In recent years, doping nanoparticles in LCs has played an effective role in affecting the ionic impurities of LCs.…”

Section: Introductionmentioning

confidence: 99%

Effect of ion trapping behavior of TiO2 nanoparticles on different parameters of weakly polar nematic liquid crystal

et al. 2018

View full text Add to dashboard Cite

In the present investigation, TiO 2 -doped weakly polar nematic liquid crystal (NLC) has been studied. This study mainly focuses on dielectric, electro-optical and optical properties of pure NLC and doped systems. Variation in different parameters like dielectric permittivity, dielectric loss, dielectric anisotropy and conductivity has been noticed. Permittivity of the doped system is almost the same as undoped system. With doping concentration, the ionic contribution to the dielectric loss as observed in low-frequency region has been suppressed and the shift in relaxation frequency toward higher frequency side has also been observed. The electrical conductivity and threshold voltage have been decreased with increasing concentration of nanoparticles (NPs). The continuous increase in dielectric anisotropy with increasing the concentration of NPs has also been observed. These results have been attributed to the trapping capability of free ions by TiO 2 NPs. Further, we focused on the study of photoluminescence (PL), UV absorbance and Fourier transformed infrared spectroscopy (FTIR) of pure and doped systems. The continuous increase in PL intensity without any shift in emission peak has been observed for doped systems. Enhancement in UV absorbance with increasing concentration of NPs has also been observed. The effect of NPs doping on molecular dynamics of NLC can be clearly seen by FTIR study. The results suggest that the TiO 2 NP-doped weakly polar NLC can have significant improved dielectric, electro-optical and optical properties. This makes the weakly polar NLC to be a potential candidate for many applications.

show abstract

Versatile nonlinear-optical materials based on mesomorphic metal alkanoates: design, properties, and applications

Cited by 35 publications

References 154 publications

Impact of titanium dioxide nanoparticles on purification and contamination of nematic liquid crystals

Impact of titanium dioxide nanoparticles on purification and contamination of nematic liquid crystals

Self-activating liquid crystal devices for smart laser protection

Effect of ion trapping behavior of TiO2 nanoparticles on different parameters of weakly polar nematic liquid crystal

Contact Info

Product

Resources

About