Gold Nanorod Assemblies: Large Area Self-Assembly of Nematic Liquid-Crystal-Functionalized Gold Nanorods (Adv. Funct. Mater. 11/2013)

2013 ◽  
Vol 23 (11) ◽  
pp. 1392-1392 ◽  
Author(s):  
S. Umadevi ◽  
Xiang Feng ◽  
Torsten Hegmann
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Gold Nanorods ◽  
Self Assembly ◽  
Gold Nanorod ◽  
Large Area

Large Area Self-Assembly of Nematic Liquid-Crystal-Functionalized Gold Nanorods

2012 ◽  
Vol 23 (11) ◽  
pp. 1393-1403 ◽  
Author(s):  
S. Umadevi ◽  
Xiang Feng ◽  
Torsten Hegmann
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Gold Nanorods ◽  
Self Assembly ◽  
Large Area

scholarly journals Large-area bulk self-assembly of plasmonic nanorods in nematic liquid crystal via surface-mediated alignment

2013 ◽  
Vol 3 (11) ◽  
pp. 1918 ◽  
Author(s):  
Qingkun Liu ◽  
Nan Wang ◽  
Pengxin Chen ◽  
Yuan Zhang ◽  
Sailing He
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Large Area

scholarly journals Mechanisms of Chiral Transfer in Optically Active Dopant – Nematic Liquid Crystal Systems

2020 ◽  
Vol 20 (4) ◽  
pp. 6-26
Author(s):  
V. A. Burmistrov ◽  
V. V. Aleksandriiskii ◽  
I. V. Novikov ◽  
O. I. Koifman
Keyword(s):  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
High Efficiency ◽  
Stationary Phases ◽  
Theoretical Description ◽  
Optically Active ◽  
Axial Coordination ◽  
Chiral Dopants

Induction of helical mesophases by incorporating chiral dopants into the nematics matrix is the promising modern trends in the chemistry of liquid crystals. This process is associated with a unique phenomenon - an amplification of chirality in liquid-crystalline phases, which ensures the detection of enantiomers by their chiral induction, much more sensitive than other methods. The relevance of this approach is due to the need to create perspective electro-optical devices operating with ultra-low control voltages based on twist effects, chromatographic stationary phases with high chiral selectivity, flexible magnets, photo-sensitive nanostructures, and other smart LC materials. The successful solution of these problems is impossible without experimental research and theoretical comprehension of the mechanisms of third level chiral transfer optically active dopant – nematic liquid crystal. In the last decade, a large number of works have appeared on the solution of these problems. This review is devoted to a generalization of the experimental results and a theoretical description of the transfer of molecular chirality to orientationally ordered systems with the participation of both chiral molecular substituents with an asymmetric carbon atom and planar or quasi-planar fragments chirally distorted relative to each other. The stereochemical aspects of induction associated with the structural correspondences of the dopant and nematic liquid crystal, as well as the main classes of optically active additives, are discussed. Application of metal complexes, both Werner and macroheterocyclic, are presented. Special attention is paid to the results of the mechanisms study of chiral transfer due to various intermolecular interactions: hydrogen bonding, axial coordination, and the formation of inclusion compounds. The high efficiency of induction of spiral mesophases has been demonstrated with a combination of different self-assembly mechanisms in liquid crystal - chiral additive systems.

scholarly journals Coupling free energy and surface anchoring mechanism in gold nanorod–nematic liquid crystal dispersions

RSC Advances ◽  
2018 ◽  
Vol 8 (8) ◽  
pp. 4104-4111 ◽  
Author(s):  
Qi Wang ◽  
Liying Liu ◽  
Lei Xu
Keyword(s):  
Free Energy ◽  
Liquid Crystal ◽  
Nematic Liquid Crystal ◽  
Gold Nanorod ◽  
Optical Birefringence ◽  
Surface Anchoring

Dependence of both the induced optical birefringence signals and simulated free energy ftotal with the pump H.

ENERGETICALLY AND STERICALLY FAVORABLE ASSEMBLY OF IDENTICAL GOLD NANORODS WITH VARYING CONCENTRATIONS OF NANOSPHERES

2021 ◽  
pp. 2150028
Author(s):  
IMTIAZ AHMAD ◽  
AKHLAQ HUSSAIN ◽  
AMBREEN ALI ◽  
RAHIM JAN
Keyword(s):  
Gold Nanorods ◽  
Self Assembly ◽  
Gold Nanorod ◽  
Potential Well ◽  
Separation Effect ◽  
Face To Face ◽  
Inner Region

Gold nanorod ribbon-like arrays as well as shape-separation effect of rods from sphere-like nanoparticles have been evaluated for identical nanorod suspension with various concentration of nanospheres. These sphere-rod mixtures are prepared with help of different amounts of AgNO3. Deposits of nanoparticles at various positions of the coffee-stain ring are observed in different arrangements. For instance, face-to-face aligned nanorods get settled in ribbon-like superstructures and these arrays are observed to be self-separated from spheres. Self-assembly and shape-separation effect are observed more systematic at the outer-edges than the inner-region of the coffee-stain ring. Experimentally, it has been observed that face-to-face formation of nanorods in suspension is energetically more probable arrangement. As the separation between two nanorods increases, the depth of potential well decreases, indicating that the upper layers of nanorods are more under the influence of lower placed nanorods than those placed in the same plane. Energetically and sterically, more feasible arrangements are observed.

scholarly journals SANS study of mixed cholesteric cellulose nanocrystal – gold nanorod suspensions

2020 ◽  
Vol 56 (85) ◽  
pp. 13001-13004
Author(s):  
Jonas Van Rie ◽  
Guillermo González-Rubio ◽  
Sugam Kumar ◽  
Christina Schütz ◽  
Joachim Kohlbrecher ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Gold Nanorods ◽  
Small Angle ◽  
Cellulose Nanocrystals ◽  
Self Assembly ◽  
Small Angle Neutron Scattering ◽  
Gold Nanorod ◽  
Cellulose Nanocrystal

Self-assembly of cellulose nanocrystals (CNCs) doped with anisotropic gold nanorods (AuNRs) was studied by small-angle neutron scattering.

Orientation, interaction and laser assisted self-assembly of organic single-crystal micro-sheets in a nematic liquid crystal

Soft Matter ◽  
2015 ◽  
Vol 11 (38) ◽  
pp. 7674-7679 ◽  
Author(s):  
M. V. Rasna ◽  
K. P. Zuhail ◽  
U. V. Ramudu ◽  
R. Chandrasekar ◽  
J. Dontabhaktuni ◽  
...  
Keyword(s):  
Experimental Study ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Single Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Nematic Liquid Crystals ◽  
Directed Assembly ◽  
Orientation Interaction ◽  
Organic Single Crystal

In this paper we report first experimental study on the orientation, interaction and directed-assembly of single crystal micro-sheets in nematic liquid crystals.

Self-Assembly of a Synthetic Opal Infiltrated with Liquid Crystal Like Photonic Crystal

2004 ◽  
Vol 97-98 ◽  
pp. 245-250
Author(s):  
Loreta Rasteniene ◽  
Stasys Pajeda ◽  
Rimas Vaisnoras
Keyword(s):  
Refractive Index ◽  
Liquid Crystal ◽  
Photonic Crystal ◽  
Nematic Liquid Crystal ◽  
Self Assembly ◽  
Stop Band ◽  
Linear Dichroism ◽  
Synthetic Opal ◽  
Multiple Diffraction ◽  
Visible Spectra

We have studied transmission and linear dichroism spectra of synthetic opal, refractive index n-= 1.342, infiltrated with nematic liquid crystal with averaged refractive index n = 1.596 or with water n = 1.30 and alcohol n = 1.28. We demonstrating that the position of the stop band in the visible spectra is shifted by changing infiltrated material, or temperature, or by variation angle of light incidence. Multiple diffraction are discussed.

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