Guangyao Liu

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The present study was designed to investigate the in vivo drug release and antibacterial properties of a novel mesoporous hydroxyapatite/chitosan (mesoHA-CS) composite loaded with vancomycin (VCM). VCM-mesoHA/CS composite was prepared via a freeze-drying method. The successful loading of VCM in the composite scaffold was verified by FT IR analyses. SEM(More)
We design, fabricate, and demonstrate a silicon nitride (Si(3)N(4)) multilayer platform optimized for low-loss and compact multilayer photonic integrated circuits. The designed platform, with 200 nm thick waveguide core and 700 nm interlayer gap, is compatible for active thermal tuning and applicable to realizing compact photonic devices such as arrayed(More)
The wurtzite-derived Cu₂ZnSn(S(1-x)Se(x))₄ alloys are studied for the first time through combining theoretical calculations and experimental characterizations. Ab initio calculations predict that wurtzite-derived Cu₂ZnSnS₄ and Cu₂ZnSnSe₄ are highly miscible, and the band gaps of the mixed-anion alloys can be linearly tuned from 1.0 to 1.5 eV through(More)
Hop stunt viroid (HSVd) has been detected in many woody species including grapevine, citrus, peach, plum, apricot, and almond. Here, we report the first detection of HSVd in jujube trees (Ziziphus jujuba). Ninety-five samples were collected from jujube trees in Cangzhou, Baoding, and Handan of the Hebei province of China in June 2006. An additional 70(More)
Core cross-linked star polymers of low polydispersity were efficiently prepared in high yield by RAFT-mediated emulsion and dispersion polymerizations in water at high solid content. These star polymers were demonstrated to be effective emulsifiers, and the emulsion was successfully used as template to fabricate polymer particles.
Highly aliovalent Na(1+) ions were selected as the dopant to substitute Bi(3+) ions in BiFeO₃ (BFO) and Bi1-xNaxFeO₃ (x = 0, 0.01, 0.03, 0.05) nanoparticles prepared via a facile sol-gel method. Weak ferromagnetism and an obvious exchange bias (EB) phenomenon without field cooling were observed in the samples. To establish the presence of EB in the(More)
This paper demonstrates rapidly reconfigurable, high-fidelity optical arbitrary waveform generation (OAWG) in a heterogeneous photonic integrated circuit (PIC). The heterogeneous PIC combines advantages of high-speed indium phosphide (InP) modulators and low-loss, high-contrast silicon nitride (Si<sub>3</sub>N<sub>4</sub>) arrayed waveguide gratings (AWGs)(More)
Nanogel synthesis by RAFT polymerization is an emerging field for the control of architectures and functions of polymeric nanomaterials for bioapplications. In this Feature Article, we review the recent development in nanogel synthesis using preformed RAFT polymers and by direct RAFT polymerizations.
We report on uniform emission intensity profile, uniform propagation constant silicon gratings for beam steering application with ultra-sharp instantaneous field-of-view (IFOV). To achieve uniform emission intensity across relatively long emission length, we designed a custom grating with varying Si3N4 width and duty cycle while maintaining a uniform(More)
Application of LiFePO4 (LFP) to large current power supplies is greatly hindered by its poor electrical conductivity (10(-9) S cm(-1)) and sluggish Li+ transport. Carbon coating is considered to be necessary for improving its interparticle electronic conductivity and thus electrochemical performance. Here, we proposed a novel, green, low cost and(More)