A5100336348- Liquid Crystal Research Advancements
- Optical Coatings and Gratings
- Photonic Crystals and Applications
- Laser Material Processing Techniques
- Advanced Surface Polishing Techniques
- Surface Modification and Superhydrophobicity
- Near-Field Optical Microscopy
- Block Copolymer Self-Assembly
- Surface Roughness and Optical Measurements
- Metamaterials and Metasurfaces Applications
- Optical Polarization and Ellipsometry
- Conducting polymers and applications
- Plasmonic and Surface Plasmon Research
- Laser-induced spectroscopy and plasma
- Organic Electronics and Photovoltaics
- Advanced optical system design
- Orbital Angular Momentum in Optics
- Advanced Antenna and Metasurface Technologies
- Perovskite Materials and Applications
- Photonic and Optical Devices
- Robotic Path Planning Algorithms
- Adhesion, Friction, and Surface Interactions
- Integrated Circuits and Semiconductor Failure Analysis
- Advanced Fluorescence Microscopy Techniques
- Astronomical Observations and Instrumentation
University of Technology Sydney
2025
North China Municipal Engineering Design & Research Institute
2025
Ministry of Water Resources of the People's Republic of China
2025
Ministry of Natural Resources
2025
Shanghai Institute of Optics and Fine Mechanics
2006-2024
Chinese Academy of Sciences
2013-2024
Southeast University
2012-2024
Nanjing Normal University
2018-2023
University of Chinese Academy of Sciences
2021-2023
Hefei Institutes of Physical Science
2021
Due to their high electron affinities, chemical and thermal stabilities, π‐conjugated molecules with imide/amide frameworks have received considerable attentions as promising candidates for high‐performance optoelectronic materials, particularly organic semiconductors carrier mobilities. The purpose of this Research News is give an overview recent advances in development performance based field‐effect transistors. It covers naphthalene diimide‐, perylene diimide‐ amide‐based conjugated...
Monodisperse poly(styrene-b-semifluorinated side chain) block copolymers were synthesized by anionic polymerization of poly(styrene-b-1,2/3,4-isoprene) followed the corresponding polymer analogous reactions. By controlling copolymer composition and relative lengths fluorocarbon hydrocarbon units in group, effect chemical structure on surface properties influence liquid crystalline semifluorinated chain behavior evaluated. The groups does not greatly affect as-prepared sample tension, but...
The surface molecular orientation of a liquid crystalline (LC) layer made up semifluorinated (SF) single side groups [−CO−(CH2)x-1−(CF2)yF] (single SF groups) attached to polyisoprene homopolymer or the isoprene block styrene−isoprene diblock copolymer was determined by analyzing partial electron yield C-edge NEXAFS signal. results show that surfaces thin polymer films are covered with uniform layer, consisting SF−LC whose average −CF2− tilt angle normal lies in range 29−46°. This is direct...
The synthesis of new semifluorinated alkyl side-chain ionenes (SFASI) is reported and involves reaction 1-bromoalkanes with poly(N,N '-dimethyl-1,6-hexanediamine) (PDHD) which was prepared by reduction poly(N,N'-dimethylhexamethyleneadipamide). quaternization efficiency the polyamine 80−85% when carried out using a solvent mixture DMF/ethanol (1/2 volume ratio) at 65 °C over long times. structure SFASI consists 10 Å charged layer resulting from quarternary ammonium groups strong coulombic...
In this paper, we report the design, synthesis and semiconducting behavior of two conjugated D–A polymers P-BPDTT P-BPDBT which entail BPD, a Pechmann dye framework, as electron accepting moieties, thieno[3,2-b]thiophene 2,2′-bithiophene donating moieties. Their HOMO/LUMO energies bandgaps were estimated based on respective cyclic voltammgrams absorption spectra thin films. possesses lower LUMO level narrower bandgap than P-BPDBT. On basis characterization field-effect transistors, film...
Deep mining in metal mines faces more and complex geological conditions, such as “three highs one disturbance” (high ground stress, high permeability, temperature, mining-induced disturbance), which can easily trigger water inrush disasters seriously affect the safety efficiency of deep mining. This paper focuses on hydrogeological structural characteristics Huize lead–zinc mine. Firstly, two main factors affecting production area, namely source channel mine, were analyzed. Based this...
A series of block polymers were synthesized from tetrahydropyranyl methacrylate (THPMA) and several fluorinated methacrylates. By changing both the length side chain nature its end group, surface properties these greatly influenced. The with perfluoroheptyl groups showed lowest tension, ∼7 mN/m, whereas those perfluoropropyl tension around 12 mN/m. changed dramatically when perfluorinated a CF2H group was capped, increasing to 18 mN/m for three −CF2− units. relative volume ratios different...
Near-edge X-ray absorption fine structure is used to investigate the temperature dependence of molecular orientation semifluorinated liquid crystalline (SF-LC) mesogens, which are attached modified isoprene backbone (i) a poly(1,2-isoprene) homopolymer and (ii) diblock copolymer consisting polystyrene blocks. Our experiments reveal existence two regions in surface SF-LC mesogens changes abruptly, but even 30 K above highest such region does not become isotropic. The lower transition for both...
Abstract In the current solution for multiwavelength achromatic flat lenses, a one-to-one correspondence exists between number of writing phase distributions and wavelengths. Breaking this requires complex design parameter optimization. Here, we show that dual-layer cascade liquid crystal Pancharatnam-Berry lens (CLCPBL) with two specific coupled distribution layers can achieve three wavelength achromaticity without any optimization process. Similarly, in three-layer cascade, wavelengths...
A series of monodisperse poly(styrene-b-isoprene[-g-perfluoroacyl]) block copolymers was synthesized by sequential anionic polymerization styrene and isoprene. The perfluorinated ester side chains were attached to the remaining double bonds isoprene via oxidative hydroboration esterification resulting alcohol corresponding acid chloride. Surfaces pure polymers or blends in polystyrene exhibit a notable fractional surface excess within uppermost 100 Å depending on preparation copolymer...
A side-chain liquid crystal (LC) block copolymer with a ferroelectric smectic C* LC has been shown to exhibit bistable switching behavior in electric fields. Ferroelectric was demonstrated for copolymers volume fractions of 0.58 and 0.52 block. SAXS TEM showed that the bulk morphologies these two materials were hexagonally packed minority amorphous polystyrene (PS) cylinders alternating lamellar PS layers, respectively. Cross-sectional 10 μm thick film fraction material used optical studies...
Among the reported organic n-type semiconductors, naphthalene diimide (NDI) derivatives have received increasing attention. In this paper, we report four non-symmetric core-expanded NDI 1–4. Electrochemical, absorption spectral and theoretical calculation studies show that LUMO energies of 1–4 are lower than parent without substitution. OFET devices based on thin films which can be easily solution-processed fabricated with conventional techniques they semiconducting behaviours. Moreover,...
Here we find that a fully immersed low refractive index SiO2 microsphere (or microcylinder, yeast cell) can clearly distinguish sample with sub-diffraction features in dark-field illumination mode. The resolvable area of the by microsphere-assisted microscopy (MAM) is composed two regions. One region locates below microsphere, and virtual image this part formed first then received microscope. other around edge directly imaged simulated enhanced electric field on surface consistent...
The practicality of using polysulfone as a host material for electro-optic polymer devices is demonstrated. For loadings 15–25 weight %, r33 values 53–55 pm/V were obtained at λ=1.06 μm. This corresponds to chromophore alignment efficiencies up 27%. Also, Mach–Zehnder demonstrated the implementation with Vπ 6.9 v, optical loss 1.8 dB/cm, and thermal stability >100 °C.
This study reports that SiO 2 was selected to fabricate broadband anti-reflection (AR) films on fused silica substrates by using glancing angle deposition and substrate rotation. Through accurate control of the graded index layer, average residual reflectance AR film can achieve an value 0.59% across a spectral range 400-1800nm. By comparing performance, with speed has higher stability compared without damage threshold than traditional film.
We present for the first time a surface plasmon-enhanced dark-field microsphere-assisted microscopy in imaging both low-contrast dielectric objects and metallic ones. demonstrate, using an Al patch array as substrate, resolution contrast are improved compared to that of metal plate substrate glass slide (DFM). 365-nm-diameter hexagonally arranged SiO nanodots assembled on three substrates can be resolved, with varied from 0.23 0.96, 300-nm-diameter close-packed polystyrene nanoparticles only...