scholarly journals A calamitic mesogenic near-infrared absorbing croconaine dye/liquid crystalline elastomer composite

2016 ◽  
Vol 7 (7) ◽  
pp. 4400-4406 ◽  
Author(s):  
Ling-Xiang Guo ◽  
Mei-Hua Liu ◽  
Sayed Mir Sayed ◽  
Bao-Ping Lin ◽  
Patrick Keller ◽  
...  
Keyword(s):  
Composite Film ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
Organic Dye

The first example of a calamitic mesogenic NIR absorbing organic dye YHD796 is reported. The corresponding homogeneously-aligned LCE/YHD796 composite film can perform a fully reversible NIR-stimulated contraction/expansion response.

Reusable gold nanorod/liquid crystalline elastomer (GNR/LCE) composite films with UV-triggered dynamic crosslinks capable of micropatterning and NIR actuation

2019 ◽  
Vol 7 (45) ◽  
pp. 14245-14254 ◽  
Author(s):  
Zhongying Wu ◽  
Liang Liu ◽  
Pin Cheng ◽  
Jianglin Fang ◽  
Tianchi Xu ◽  
...  
Keyword(s):  
Composite Film ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
Composite Films ◽  
Gold Nanorod

A facilely prepared GNR/LCE composite film with UV-triggered reversible dynamic crosslinking capable of near infrared (NIR)-driven macroscopic deformations, precise micro-patterned localization and re-shapeability.

scholarly journals Recent development of near-infrared photoacoustic probes based on small-molecule organic dye

2021 ◽  
Author(s):  
Chonglu Li ◽  
Chang Liu ◽  
Yifan Fan ◽  
Xin Ma ◽  
Yibei Zhan ◽  
...  
Keyword(s):  
Small Molecule ◽  
Near Infrared ◽  
Organic Dye

In this review, we discuss the recent development of near-infrared photoacoustic probes based on small molecule dyes, which focus on their “always on” and “activatable” form in biomedicine.

scholarly journals High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 440
Author(s):  
Yuan Deng ◽  
Shi-Qin Li ◽  
Qian Yang ◽  
Zhi-Wang Luo ◽  
He-Lou Xie
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
High Efficiency ◽  
Polymer Brush ◽  
Light Transmittance ◽  
Smart Window ◽  
Vertical Orientation ◽  
Smart Windows ◽  
Conversion Materials

Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.

scholarly journals Synthesis, Mesomorphism and the Optical Properties of Alkyl-deuterated Nematogenic 4-[(2,6-difluorophenyl)ethynyl]biphenyls

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4653
Author(s):  
Jakub Herman ◽  
Piotr Harmata ◽  
Michał Czerwiński ◽  
Olga Strzeżysz ◽  
Marta Pytlarczyk ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Mass Spectrometry ◽  
Differential Scanning Calorimetry ◽  
Optical Properties ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
Synthesis And Characterization ◽  
Molecular Approach ◽  
Scanning Calorimetry

The synthesis and characterization of new deuterated liquid crystal (LC) compounds based on phenyl tolane core is described in this paper. The work presents an alternative molecular approach to the conventional LC design. Correlations between molecular structure and mesomorphic and optical properties for compounds which are alkyl-hydrogen terminated and alkyl-deuterium, have been drawn. The compounds are characterized by mass spectrometry (electron ionization) analysis and infrared spectroscopy. They show enantiotropic nematic behavior in a broad temperature range, confirmed by a polarizing thermomicroscopy and differential scanning calorimetry. Detailed synthetic procedures are attached. Synthesized compounds show a significantly reduced absorption in the near-infrared (NIR) and medium-wavelength infrared (MWIR) radiation range, and stand as promising components of medium to highly birefringent liquid crystalline mixtures.

scholarly journals Investigation of optical and photoelectric properties of poly (ohydroxyamide) sensitized by phthalocyanine as a perspective material for solar cells

2020 ◽  
Vol 220 ◽  
pp. 01019
Author(s):  
Elvira Fazalova ◽  
Konstantin Kochunov ◽  
Elena Bodyago ◽  
Georgii Konoplev ◽  
Nikolay Mukhin ◽  
...  
Keyword(s):  
Thin Films ◽  
Solar Radiation ◽  
Near Infrared ◽  
Wavelength Region ◽  
Organic Dye ◽  
Glass Substrates ◽  
Photoelectric Properties ◽  
Zinc Phthalocyanines ◽  
Infrared Spectral ◽  
Potential Use

Optical and photoelectric properties of poly (ohydroxyamide) (PHA) sensitized with zinc phthalocyanines were investigated in the visible and near infrared spectral regions. The structures were deposited on glass substrates by centrifugation and subsequent drying of a PHA film without thermal annealing. Optical spectra revealed characteristic absorption peaks of phthalocyanine in the longer wavelength region at 620-640 nm and 680-700 nm; absorption of the PHA matrix monotonously increases to the shorter wavelengths starting from 700 nm. Measurements of the photocurrent under irradiation with a high-power LED at a wavelength 630 nm showed photoconductivity related to the organic dye; photoconductivity also was observed while irradiated at 540 nm, presumably due to the absorption of PHA matrix. For non-sensitized (dye-free) PHA films no detectable photocurrents were produced by 630 nm irradiation. It was shown that introducing of phthalocyanines significantly improves optical absorption and photoconductivity of PHA thin films at the wavelengths, where the maximum in the spectral distribution of solar radiation lies. It was concluded that phthalocyanine-sensitized PHA has the potential use as a photosensitive organic material for solar applications, for example in developing composite organicinorganic structures with ferroelectrics.

Supersensitization of CdS Quantum Dots with a Near-Infrared Organic Dye: Toward the Design of Panchromatic Hybrid-Sensitized Solar Cells

ACS Nano ◽  
2011 ◽  
Vol 5 (11) ◽  
pp. 9238-9245 ◽  
Author(s):  
Hyunbong Choi ◽  
Roxana Nicolaescu ◽  
Sanghyun Paek ◽  
Jaejung Ko ◽  
Prashant V. Kamat
Keyword(s):  
Quantum Dots ◽  
Solar Cells ◽  
Near Infrared ◽  
Organic Dye ◽  
Cds Quantum Dots ◽  
Sensitized Solar Cells

Near-Infrared Organic Dye-Based Nanoagent for the Photothermal Therapy of Cancer

2016 ◽  
Vol 8 (44) ◽  
pp. 29899-29905 ◽  
Author(s):  
Bingjiang Zhou ◽  
Yunzheng Li ◽  
Guangle Niu ◽  
Minhuan Lan ◽  
Qingyan Jia ◽  
...  
Keyword(s):  
Photothermal Therapy ◽  
Near Infrared ◽  
Organic Dye
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