نتایج جستجو برای: organic crystals

تعداد نتایج: 254288  

Journal: :Nanoscale 2011
Sen Liu Jingqi Tian Lei Wang Hailong Li Xuping Sun

The present paper reports an organic solvent-induced controllable crystallization of a water-soluble inorganic salt Na(3)[Au(SO(3))(2)] into ultralong nanobelts and hierarchical microstructures of one-dimensional (1D) nanowires. It was found that the morphology of the resulting crystals can be fine tuned by simply varying the experimental parameters, such as the ratios of water to organic solve...

Journal: :Angewandte Chemie 2009
Xiaogang Liu

Hex nut: An emerging synthetic approach based on metal-organic coordination-polymer templates has been used to fabricate micro- and nanoscale crystals. By using a diverse range of molecular building blocks coupled with conventional synthetic techniques, it is possible to synthesize ZnO crystals with tailored sizes, shapes (such as hexagonal rings; see figure), and surface properties.

2011
Kirill V. Axenov Sabine Laschat

The last five years' achievements in the synthesis and investigation of thermotropic ionic liquid crystals are reviewed. The present review describes the mesomorphic properties displayed by organic, as well as metal-containing ionic mesogens. In addition, a short overview on the ionic polymer and self-assembled liquid crystals is given. Potential and actual applications of ionic mesogens are al...

Journal: :Advanced materials 2012
Nikos Vasilantonakis Konstantina Terzaki Ioanna Sakellari Vytautas Purlys David Gray Costas M Soukoulis Maria Vamvakaki Maria Kafesaki Maria Farsari

The fabrication of fully three-dimensional photonic crystals with a bandgap at optical wavelengths is demonstrated by way of direct femtosecond laser writing of an organic-inorganic hybrid material with metal-binding moieties, and selective silver coating using electroless plating. The crystals have 600-nm intralayer periodicity and sub-100 nm features, and they exhibit well-defined diffraction...

2003
Hongwen Ren Yun-Hsing Fan Shin-Tson Wu

A prism grating using polymer stabilized liquid crystal was fabricated and its diffraction characteristics evaluated. Such a prism grating exhibits not only a periodic grating structure but also a prism-like gradient refractive index within each grating period. As a result, the diffraction behavior is asymmetric. The first order exhibits high diffraction efficiency while the zeroth order has a ...

2016
G. M. Zharkova

2014 The temperature and time dependencies of the wavelength of selective light scattering of cholesteric liquid crystals dispersed in various polymers are studied. The stability of liquid crystals is found to be determined by the gas permeability of polymers. The injection of the antioxidants into the polymer increases essentially the lifetime of the capsulated liquid crystals. REVUE DE PHYSIQ...

Journal: :Chemical communications 2014
Alexander N Kulak Pengcheng Yang Yi-Yeoun Kim Steven P Armes Fiona C Meldrum

A simple, one-pot method is presented whereby gold nanoparticles coated with a zwitterionic diblock copolymer are incorporated within single crystals of calcite. This may provide a versatile alternative to dyeing crystal with organic molecules and could be extended to create a series of new nanocomposite crystals with novel properties.

2009
Teruyuki Nakato Nobuyoshi Miyamoto

Inorganic layered crystals exemplified by clay minerals can be exfoliated in solvents to form colloidal dispersions of extremely thin inorganic layers that are called nanosheets. The obtained “nanosheet colloids” form lyotropic liquid crystals because of the highly anisotropic shape of the nanosheets. This system is a rare example of liquid crystals consisting of inorganic crystalline mesogens....

2017
H.-S. Kitzerow J. Rand P. Crooker

We have studied the electrooptic properties of droplets of cholesteric liquid crystal dispersed in a polymer. Application of AC electric fields to the droplets leads to a conversion of the droplet from a nonreflecting to a selectively reflecting appearance. When the field is suddenly

2007
A. Casian V. Dusciac R. Dusciac

The thermoelectric properties of quasi-one-dimensional (Q1D) organic crystals with p-type conduction band are studied. Two main electron-phonon interaction mechanisms and carriers scattering on impurities are taken into account. The relaxation time as a function of carrier energy is analyzed for different values of crystal parameters. It is shown that under certain conditions, when the interfer...

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