In situ creation of reactive polymer nanoparticles and resulting polymer layers formed at the interfaces of liquid crystals (Conference Presentation)

2017 ◽  
Author(s):  
Shin-Woong Kang ◽  
Sudarshan Kundu ◽  
Heung-Shik Park ◽  
Keun Chan Oh ◽  
Jae Jin Lyu
Keyword(s):  
Liquid Crystals ◽  
Polymer Nanoparticles ◽  
Polymer Layers ◽  
Reactive Polymer

scholarly journals Nanocomposites of Polyaniline and Cellulose Nanocrystals Prepared in Lyotropic Chiral Nematic Liquid Crystals

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Dawei Zhang ◽  
Lihong Zhang ◽  
Bingzhe Wang ◽  
Guangzhe Piao
Keyword(s):  
Liquid Crystals ◽  
Cellulose Nanocrystals ◽  
Nematic Liquid Crystals ◽  
Weight Ratio ◽  
Asymmetric Reaction ◽  
Reaction Field ◽  
Electron Microscopies ◽  
Chiral Nematic ◽  
Before And After

Stable lyotropic chiral nematic liquid crystals (N*-LCs) of cellulose nanocrystals (CNs) were prepared via hydrolysis using sulfuric acid. The lyotropic N*-LCs were used as an asymmetric reaction field to synthesize polyaniline (PANI) onto CNs by in situ polymerization. As a primary step, we examined the mesophase transition of the N*-LCs of CNs suspension before and after in situ polymerization of aniline (ANI) by polarizing optical microscopy. The structure of nanocomposites of PANI/CNs was investigated at a microscopic level using Fourier transform infrared spectroscopy and X-ray diffraction. Influence of the CNs-to-ANI ratio on the morphology of the nanocomposites was also investigated at macroscopic level by scanning electron and transmission electron microscopies. It is found that the weight ratio of CNs to aniline in the suspension significantly influenced the size of the PANI particles and interaction between CNs and PANI. Moreover, electrical properties of the obtained PANI/CNs films were studied using standard four-probe technique. It is expected that the lyotropic N*-LCs of CNs might be available for an asymmetric reaction field to produce novel composites of conjugated materials.

Laser etched gratings on polymer layers for alignment of liquid crystals

1998 ◽  
Vol 72 (17) ◽  
pp. 2078-2080 ◽  
Author(s):  
C. J. Newsome ◽  
M. O’Neill ◽  
R. J. Farley ◽  
G. P. Bryan-Brown
Keyword(s):  
Liquid Crystals ◽  
Polymer Layers

Fast, Real-Time, In Situ Monitoring of Solar Ultraviolet Radiation Using Sunlight-Driven Photoresponsive Liquid Crystals

2018 ◽  
Vol 6 (6) ◽  
pp. 1701337 ◽  
Author(s):  
Jiajun Tian ◽  
Yanrong He ◽  
Juntao Li ◽  
Jie Wei ◽  
Gangqiang Li ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Ultraviolet Radiation ◽  
Real Time ◽  
In Situ Monitoring ◽  
Solar Ultraviolet Radiation ◽  
Solar Ultraviolet

Hydrogen peroxide degradable conjugated polymer nanoparticles for fluorescence and photoacoustic bimodal imaging

2018 ◽  
Vol 54 (20) ◽  
pp. 2518-2521 ◽  
Author(s):  
Jie Liu ◽  
Shaowei Wang ◽  
Xiaolei Cai ◽  
Shiwei Zhou ◽  
Bin Liu
Keyword(s):  
Hydrogen Peroxide ◽  
Contrast Agent ◽  
Conjugated Polymer ◽  
Cellular Imaging ◽  
Polymer Nanoparticles ◽  
Dual Modality ◽  
Bimodal Imaging ◽  
Conjugated Polymer Nanoparticles

A hydrogen peroxide degradable fluorescence/photoacoustic dual-modality contrast agent is prepared via in situ Sonogashira polymerization for cellular imaging.

scholarly journals Dual wavelength in situ photoalignment for stable planar alignment of nematic liquid crystals

2018 ◽  
Vol 8 (8) ◽  
pp. 2366 ◽  
Author(s):  
Vineet Kumar ◽  
Aboozar Nasrollahi ◽  
Vijay Kumar Baliyan ◽  
Heung-Shik Park ◽  
Myong-Hoon Lee ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Dual Wavelength

A Novel Mini Calibrator for Thermochromic Liquid Crystals

2000 ◽  
Vol 123 (3) ◽  
pp. 604-607 ◽  
Author(s):  
Christopher J. Elkins ◽  
John Fessler ◽  
John K. Eaton
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Wide Band ◽  
Maximum Error ◽  
Curved Surfaces ◽  
Copper Block ◽  
Crystal Sample ◽  
Dark Blue ◽  
Cooling Ability

A small calibrator has been constructed to facilitate wide-band liquid crystal temperature measurements on complex, curved surfaces. The calibrator’s size, 21.3 mm by 20.3 mm by 10.0 mm thick, makes it ideal for in-situ calibrations at multiple sites on curved surfaces. Its design utilizes the heating/cooling ability of a thermoelectric cooler, and its temperature is quickly and accurately controlled by computer. To test the calibrator’s accuracy, a liquid crystal sample was calibrated. Subsequent comparisons to thermistor measurements of a uniform temperature copper block painted with liquid crystals showed the calibration to be accurate to +/−0.1°C between the red start and the approximate blue start temperatures, and the maximum error was less than +/−0.3°C in the dark blue/violet region.

In Situ Synthesis and Assembly of Gold Nanoparticles Embedded in Glass-Forming Liquid Crystals

2007 ◽  
Vol 119 (18) ◽  
pp. 3333-3338 ◽  
Author(s):  
V. Ajay Mallia ◽  
Praveen Kumar Vemula ◽  
George John ◽  
Ashavani Kumar ◽  
Pulickel M. Ajayan
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
In Situ Synthesis ◽  
Glass Forming
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