Light-induced wide range color switching of liquid crystal blue phase doped with hydrogen-bonded chiral azobenzene switches

RSC Advances ◽  
2014 ◽  
Vol 4 (54) ◽  
pp. 28597-28600 ◽  
Author(s):  
Ouyu Jin ◽  
Dengwei Fu ◽  
Jie Wei ◽  
Huai Yang ◽  
Jinbao Guo
Keyword(s):  
Liquid Crystal ◽  
Wavelength Region ◽  
Visible Wavelength ◽  
Wide Range ◽  
Blue Phase ◽  
Color Switching ◽  
Hydrogen Bonded

Reversible phototuning of the reflection color of BP I over the visible wavelength region was achieved in a LC-BPs by employing a new kind of H-bonded chiral azobenzene switches.

Hydrogen-bonded effects on supramolecular blue phase liquid crystal dimeric complexes

RSC Advances ◽  
2015 ◽  
Vol 5 (67) ◽  
pp. 54629-54637 ◽  
Author(s):  
Chong-Lun Wei ◽  
Te-Cheng Chen ◽  
Putikam Raghunath ◽  
Ming-Chang Lin ◽  
Hong-Cheu Lin
Keyword(s):  
Liquid Crystal ◽  
Molar Ratios ◽  
Dimeric Complexes ◽  
Phase Liquid ◽  
Blue Phase ◽  
Chiral Centers ◽  
Bonded Complexes ◽  
Hydrogen Bonded

The number/position of chiral centers and the molar ratios of H-donors/H-acceptors affect the blue phase ranges of asymmetric H-bonded complexes.

P-148: Fast Color-Switching Device in a Liquid-Crystal Blue Phase Cell

2011 ◽  
Vol 42 (1) ◽  
pp. 1664-1666
Author(s):  
Ji-Yi Chiou ◽  
Hui-Yu Chen ◽  
Sandy Chen
Keyword(s):  
Liquid Crystal ◽  
Phase Cell ◽  
Switching Device ◽  
Blue Phase ◽  
Color Switching

Design, synthesis and application of hydrogen bonded smectic liquid crystal matrix encapsulated ZnO nanospikes

2015 ◽  
Vol 3 (45) ◽  
pp. 11907-11917 ◽  
Author(s):  
Kaushik Pal ◽  
M. L. N. Madhu Mohan ◽  
Bihong Zhan ◽  
Guoping Wang
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Next Generation ◽  
Nanoscale Devices ◽  
Design Synthesis ◽  
Crystal Matrix ◽  
Smectic Liquid Crystal ◽  
Wide Range ◽  
Liquid Crystal Matrix ◽  
Hydrogen Bonded

ZnO nanospikes dispersed hydrogen bonded liquid crystals, due to their novel switching properties, are promising components in a wide range of nanoscale devices for next generation applications.

Stabilization and optical switching of liquid crystal blue phase doped with azobenzene-based bent-shaped hydrogen-bonded assemblies

RSC Advances ◽  
2015 ◽  
Vol 5 (82) ◽  
pp. 67357-67364 ◽  
Author(s):  
Jiao Wang ◽  
Yang Shi ◽  
Kuan Yang ◽  
Jie Wei ◽  
Jinbao Guo
Keyword(s):  
Liquid Crystal ◽  
Optical Switching ◽  
Azobenzene Group ◽  
Blue Phase ◽  
Hydrogen Bonded

Stabilization and phototuning of the reflection color of BP I have been demonstrated in a BP-LCs by employing a new kind of bent-shaped H-bonded assemblies with azobenzene group.

scholarly journals Planetary Nebulae in M31: Abundances, and comparison with bright Planetary Nebulae in the LMC

1997 ◽  
Vol 180 ◽  
pp. 475-476
Author(s):  
M. G. Richer ◽  
G. Stasińska ◽  
M. L. McCall
Keyword(s):  
Planetary Nebula ◽  
Luminosity Function ◽  
Large Population ◽  
Wavelength Region ◽  
Planetary Nebulae ◽  
Surprising Result ◽  
Population Synthesis ◽  
Abundance Distribution ◽  
Wide Range ◽  
The Mean

We have obtained spectra of 28 planetary nebulae in the bulge of M31 using the MOS spectrograph at the Canada-France-Hawaii Telescope. Typically, we observed the [O II] λ3727 to He I λ5876 wavelength region at a resolution of approximately 1.6 å/pixel. For 19 of the 21 planetary nebulae whose [OIII]λ5007 luminosities are within 1 mag of the peak of the planetary nebula luminosity function, our oxygen abundances are based upon a measured [OIII]λ4363 intensity, so they are based upon a measured electron temperature. The oxygen abundances cover a wide range, 7.85 dex < 12 + log(O/H) < 9.09 dex, but the mean abundance is surprisingly low, 12 + log(O/H)–8.64 ± 0.32 dex, i.e., roughly half the solar value (Anders & Grevesse 1989). The distribution of oxygen abundances is shown in Figure 1, where the ordinate indicates the number of planetary nebulae with abundances within ±0.1 dex of any point on the x-axis. The dashed line indicates the mean abundance, and the dotted lines indicate the ±1 σ points. The shape of this abundance distribution seems to indicate that the bulge of M31 does not contain a large population of bright, oxygen-rich planetary nebulae. This is a surprising result, for various population synthesis studies (e.g., Bica et al. 1990) have found a mean stellar metallicity approximately 0.2 dex above solar. This 0.5 dex discrepancy leads one to question whether the mean stellar metallicity is as high as the population synthesis results indicate or if such metal-rich stars produce bright planetary nebulae at all. This could be a clue concerning the mechanism responsible for the variation in the number of bright planetary nebulae observed per unit luminosity in different galaxies (e.g., Hui et al. 1993).

scholarly journals A coma-free super-high resolution optical spectrometer using 44 high dispersion sub-gratings

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Hua-Tian Tu ◽  
An-Qing Jiang ◽  
Jian-Ke Chen ◽  
Wei-Jie Lu ◽  
Kai-Yan Zang ◽  
...  
Keyword(s):  
High Resolution ◽  
Spectral Resolution ◽  
Wavelength Region ◽  
Ultra Violet ◽  
High Spectral Resolution ◽  
Visible Range ◽  
High Dispersion ◽  
Charge Coupled Device ◽  
Wide Range ◽  
High Resolution Spectrometer

AbstractUnlike the single grating Czerny–Turner configuration spectrometers, a super-high spectral resolution optical spectrometer with zero coma aberration is first experimentally demonstrated by using a compound integrated diffraction grating module consisting of 44 high dispersion sub-gratings and a two-dimensional backside-illuminated charge-coupled device array photodetector. The demonstrated super-high resolution spectrometer gives 0.005 nm (5 pm) spectral resolution in ultra-violet range and 0.01 nm spectral resolution in the visible range, as well as a uniform efficiency of diffraction in a broad 200 nm to 1000 nm wavelength region. Our new zero-off-axis spectrometer configuration has the unique merit that enables it to be used for a wide range of spectral sensing and measurement applications.

scholarly journals Low voltage and high contrast blue phase liquid crystal with red-shifted Bragg reflection

2013 ◽  
Vol 102 (1) ◽  
pp. 011113 ◽  
Author(s):  
Jin Yan ◽  
Zhenyue Luo ◽  
Shin-Tson Wu ◽  
Jyh-Wen Shiu ◽  
Yu-Cheng Lai ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Low Voltage ◽  
Bragg Reflection ◽  
High Contrast ◽  
Phase Liquid ◽  
Blue Phase

scholarly journals Hydrogen-bonded silica gels dispersed in a smectic liquid crystal: A random fieldXYsystem

2002 ◽  
Vol 65 (5) ◽  
Author(s):  
S. Park ◽  
R. L. Leheny ◽  
R. J. Birgeneau ◽  
J.-L. Gallani ◽  
C. W. Garland ◽  
...  
Keyword(s):  
Liquid Crystal ◽  
Silica Gels ◽  
Smectic Liquid Crystal ◽  
Hydrogen Bonded
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