Photo-thermal effects in gold nanoparticles dispersed in thermotropic nematic liquid crystals

2015 ◽  
Vol 17 (31) ◽  
pp. 20281-20287 ◽  
Author(s):  
Luigia Pezzi ◽  
Luciano De Sio ◽  
Alessandro Veltri ◽  
Tiziana Placido ◽  
Giovanna Palermo ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Thermal Effects ◽  
Nematic Liquid Crystals ◽  
Anisotropic Media ◽  
Nanoscale Heat Transfer

Investigation of nanoscale heat transfer in anisotropic media by combining the plasmonic properties of gold nanoparticles and the thermosensitivity of liquid crystals.

Nematic liquid crystals used to control photo-thermal effects in gold nanoparticles

2016 ◽  
Author(s):  
Luigia Pezzi ◽  
Luciano De Sio ◽  
Giovanna Palermo ◽  
Alessandro Veltri ◽  
Tiziana Placido ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Thermal Effects ◽  
Nematic Liquid Crystals

Effect of gold nanoparticles on intrinsic material parameters and luminescent characteristics of nematic liquid crystals

2019 ◽  
Vol 295 ◽  
pp. 111872 ◽  
Author(s):  
Aradhana Roy ◽  
Bhupendra Pratap Singh ◽  
Geeta Yadav ◽  
Hiba Khan ◽  
Sandeep Kumar ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Material Parameters

scholarly journals Enhanced Photoluminescence in Gold Nanoparticles Doped Homogeneous Planar Nematic Liquid Crystals

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Chi-Huang Chang ◽  
Rong-Ji Lin ◽  
Chuen-Lin Tien ◽  
Shang-Min Yeh
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Surface Area ◽  
Nematic Liquid Crystals ◽  
Subsequent Decay ◽  
Enhanced Photoluminescence ◽  
Pl Intensity

This study reported the photoluminescence (PL) of gold nanoparticles (GNPs) doped planar nematic liquid crystals (NLCs) and observed around 64% enhancement in PL intensity with suitable doping amounts of GNPs in liquid crystals 5CB. The enhancement in PL intensity has been attributed to the increased surface area from GNPs, which results in increased emissions due to the increased scattering of excitation. The subsequent decay of PL intensity with doping more amounts of GNPs in liquid crystals 5CB was due to the aggregation of the GNPs, which resulted in decayed emissions due to the decay of the scattering of excitation. The concentration and the size of GNPs, as well as the orientation of the LCs’ director, with respect to the excitation, which depend on the intensity of the PL, were also investigated.

scholarly journals Interactions of accessible solitons with interfaces in anisotropic media: the case of uniaxial nematic liquid crystals

2013 ◽  
Vol 15 (4) ◽  
pp. 043011 ◽  
Author(s):  
A Alberucci ◽  
A Piccardi ◽  
R Barboza ◽  
O Buchnev ◽  
M Kaczmarek ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Anisotropic Media

Near-Field Radiative Heat Transfer Between Mie Resonance-Based Metamaterials Made of Coated Nonmagnetic Particles

2019 ◽  
Author(s):  
Lu Lu ◽  
Jinlin Song ◽  
Kun Zhou ◽  
Qiang Cheng
Keyword(s):  
Heat Transfer ◽  
Heat Flux ◽  
Liquid Crystals ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Nematic Liquid Crystals ◽  
Near Field ◽  
Core Shell ◽  
Mie Resonance ◽  
Shell Particles

Abstract Near-field radiative heat transfer between Mie resonance-based metamaterials composed of SiC/d-Si (silicon carbide and doped silicon) core/shell particles immersed in aligned nematic liquid crystals are numerically investigated. The metamaterials composed of core/shell particles exhibit superior performances of enhanced heat transfer and obvious modulation effect when compared to that without shell. The underlying mechanism can be explained that the excitation of Fröhlich mode and epsilon-near-zero (ENZ) resonances both contribute to the total heat flux. Modulation of near-field radiative heat transfer can be realized with the host material of aligned nematic liquid crystals. The largest modulation ratio could be achieved as high as 0.45 for metamaterials composed of core/shell SiC/d-Si particles, and the corresponding heat flux is higher than other similar materials such as LiTaO3/GaSb and Ge/LiTaO3. While with the same volume filling fraction, the modulation ratio of that composed of SiC particles is only 0.2. We show that the core/shell nanoparticles dispersed liquid crystals (NDLCs) have a great potential in enhancing the near-field radiative heat transfer in both the p and s polarizations with the radii of 0.65 μm, and Mie-metamaterials are shown for the first time to modulate heat flux within sub-milliseconds.

Electro-optical performance of nematic liquid crystals doped with gold nanoparticles

2020 ◽  
Vol 32 (39) ◽  
pp. 395102
Author(s):  
D N Chausov ◽  
A D Kurilov ◽  
R N Kucherov ◽  
A V Simakin ◽  
S V Gudkov
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Optical Performance

High Optical Nonlinearity of Nematic Liquid Crystals Doped with Gold Nanoparticles

2012 ◽  
Vol 116 (23) ◽  
pp. 12934-12939 ◽  
Author(s):  
Nina Podoliak ◽  
Dorota Bartczak ◽  
Oleksandr Buchnev ◽  
Antonios G. Kanaras ◽  
Malgosia Kaczmarek
Keyword(s):  
Gold Nanoparticles ◽  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Optical Nonlinearity
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