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Huang X.,Central China Normal University | Huang X.,Kashgar Teachers College | Yang D.,Hubei Normal University | Yang H.,Central China Normal University
Journal of Applied Physics | Year: 2014

A multiple-band metamaterial reflective polarization converter (RPC) is proposed, which is composed of the dielectric substrate sandwiched with U-shaped metallic patterns and continuous metal film. The proposed U-shaped metamaterial RPC (UMM-RPC) can convert a linearly polarized wave to its cross polarized wave at the three resonant frequencies, which also can convert the linearly polarized wave to circularly polarized wave at other three resonant frequencies. Furthermore, the proposed UMM-RPC can maintain the same conversional direction at the three resonant frequencies when incident on a circularly polarized wave. The simulated and measured results are in agreement in the entire frequency range, and the polarization conversion ratio is over 90% for both linear and circular polarizations. The surface current distributions of the UMM-RPC are discussed to look into the physical mechanism. The proposed UMM-RPC has simple geometry but more operating frequency bands compared to the previous designs and can be used in applications such as antenna radome, remote sensors, and radiometer. © 2014 AIP Publishing LLC. Source

Guo L.-Y.,Central China Normal University | Li M.-H.,Ningbo University | Huang X.-J.,Central China Normal University | Huang X.-J.,Kashgar Teachers College | Yang H.-L.,Central China Normal University
Applied Physics Letters | Year: 2014

Electric toroidal dipolar response has been achieved by metamaterial based on sun-like aperture element at microwave frequency. It is confirmed numerically by scattered powers that the electric toroidal dipolar moment dominates over other moments at the corresponding resonance. This proposed metamaterial exhibits resonant transparency under linearly polarized incidence caused by destructive interference between magnetic dipole and electric toroidal dipole. Notably, it also provides circular cross-polarization conversions between left-handed circularly polarized wave and right-handed circularly polarized wave at the same frequency. These properties associated with elusive electric toroidal dipolar moment offer an avenue for various potential applications in microwave devices. © 2014 AIP Publishing LLC. Source

Abdukayum A.,Nankai University | Abdukayum A.,Kashgar Teachers College | Yang C.-X.,Nankai University | Zhao Q.,Nankai University | And 3 more authors.
Analytical Chemistry | Year: 2014

The development of multimodal nanoprobes that combined properties of near-infrared (NIR) fluorescence and magnetic resonance imaging (MRI) within a single probe is very important for medical diagnosis. The NIR-emitting persistent luminescent nanoparticles (PLNPs) are ideal for optical imaging owing to no need for in situ excitation, the absence of background noise, and deep tissue penetration. However, no PLNP based multimodal nanoprobes have been reported so far. Here, we report a novel multimodal nanoprobe based on the gadolinium complexes functionalized PLNPs (Gd(III)-PLNPs) for in vivo MRI and NIR luminescence imaging. The Gd(III)-PLNPs not only exhibit a relatively higher longitudinal relaxivity over the commercial Gd(III)-diethylenetriamine pentaacetic acid complexes but also keep the superlong persistent luminescence. The prepared Gd(III)-PLNPs multimodal nanoprobe offers great potential for MRI/optical imaging in vivo. © 2014 American Chemical Society. Source

Wang D.,Kashgar Teachers College
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title complex, [Ni(C11H16N3O)] Cl·2H2O, the NiII ion is coordinated within a distorted square-planar environment. In the crystal, intermolecular N - H⋯Cl, N - H⋯O, O - H⋯O, O - H⋯Cl and weak C - H⋯O hydrogen bonds link the components into a two-dimensional network parallel to (001). Source

Turson M.,Nankai University | Turson M.,Kashgar Teachers College | Zhou M.,Nankai University | Jiang P.,Nankai University | Dong X.,Nankai University
Journal of Separation Science | Year: 2011

The "living"/controlled radical polymerization has provided an opportunity in making a more homogeneous polymer, which is favorable for polymer-based monolithic column fabrication. To study its application in the preparation of separation material, a capillary poly(ethylhexyl methacrylate-co-ethylene dimethacrylate) monolithic column has been synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. The correlation between the synthetic conditions and the polymer structures and separation performance was studied. The result indicated RAFT-mediated reaction provides condition for creating polymers with narrower pore size distribution and higher column efficiency compared with traditional polymerization. The "living" property of the RAFT polymerization was further utilized to graft hydrophilic polymer on the surface of poly(ethylhexyl methacrylate-co- ethylene dimethacrylate). The hydrophilic chain modified monolithic column has both abilities of protein exclusion and small hydrophobic compound retention. The result indicated that RAFT polymerization can be used for making multifunctional material. The restricted access monolithic material synthesized by this method can be used in biological sample analysis with HPLC direct injection. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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