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王荣明, Wei Liu, Rongming Wang, , a and Ning Wang, a
APPLIED PHYSICS LETTERS 97, 041916 (2010),-0001,():
-1年11月30日
Ultrathin ZnS nanobelts were assembled by ultrasmall nanocrystals with oriented self assembly, which were then transformed into their single-crystal counterparts by thermal treatment in N2. ZnO/ZnS heterostructures were also obtained at elevated temperature in open air, where well aligned ZnO nanocones were grown along the ZnS nanobelts with a definite rientation relationship described as 0001 ZnS 0001 ZnO and 101¯0 ZnS 101¯0 ZnO. Mixed transition and tuned band gaps of the heterostructure were experimentally observed, which was in good agreement with the theoretical predications and can be interpreted based on the model of a strained staggered type-II band structure. © 2010 American Institute of Physics.
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【期刊论文】Amplification of Fluorescent Contrast by Photonic Crystals in Optical Storage
王荣明, By Heng Li, Jingxia Wang, Hui Lin, Liang Xu, Wei Xu, Rongming Wang, * Yanlin Song, * and Daoben Zhu
Adv. Mater. 2010, 22, 1237-1241,-0001,():
-1年11月30日
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【期刊论文】Magnetite hollow spheres: solution synthesis, phase formation and magnetic property
王荣明, Qian Sun • Zheng Ren • Rongming Wang • Weimeng Chen • Chinping Chen
J Nanopart Res (2011) 13: 213-220,-0001,():
-1年11月30日
Polycrystalline magnetite hollow spheres with diameter of about 200nm and shell thickness of 30–60 nm were prepared via a facile solution route. For the reaction, ethylene glycol (EG) served as the reducing agent and soldium acetate played the role of precipitator. In addition, polyvinylpyrrolidone (PVP) served as a surface stabilizer. The morphologies and structures were characterized by scanning electron microscopy, transmission electron microscopy and X-ray diffraction. The intermediate products at different stages were also studied to shed light on the evolution of phase formation. It revealed that the hollow structure formed via self-assembly of nanocrystallites (about 15 nm) using sodium acetate as mild precipitator. Evidences further pointed out that the Ostwald ripening process well explained the growth mechanism of the hollow structure. Magnetization measurements showed that the coercivity of magnetite hollow spheres at low temperature is about 200 Oe and the saturation magnetization is about 83 emu g-1, roughly 85% that of the bulk phase, close to the value of its solid counterpart. In addition, a freezing transition was observed at 25 K.
Magnetite hollow spheres Phase formation Magnetic property
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【期刊论文】Fluorescence enhancement by heterostructure colloidal photonic crystals with dual stopbands
王荣明, Heng Li a, Jingxia Wang b, Feng Liu c, Yanlin Song b, *, Rongming Wang a
Journal of Colloid and Interface Science 356 (2011) 63-68,-0001,():
-1年11月30日
In this work, we present a facile approach on the remarkable enhancement of fluorescent signal by heterostructure colloidal photonic crystals (PCs) with dual stopbands. The intensity of fluorescent medium on heterostructure PCs with dual stopbands overlapping the excitation wavelength and the emission wavelength of fluorescent medium can be up to 162-fold enhancement in comparison to that on the control sample. Otherwise, parameters of heterostructure PC films such as film thickness or stacking order have important effects on fluorescent signals. The method will be of great significance for developing the highly sensitive fluorescence-based detection.
Colloidal photonic crystals, Dual stopbands, Fluorescence, enhancement
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