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Self-assembly structure formation on patterned InP surfaces

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science china(Technological sciences) 2009年第9期52卷 2732-2736页

作者： su ge1,2.cao {2. & liu tianzhong3 1 institute of material science and engineering,ocean University of china,qingdao 2.6100,china 2.Nanoscale Physics Research Laboratory,School of Physics and Astronomy,the University of Birmingham,Edgbaston,Birmingham B15 2.T,UK 3 College of Food science and engineering,ocean University of china,qingdao 2.6003,china institute of material {2. and engineering Ocean University of China Qingdao 266100 China Nanoscale Physics Research Laboratory School of Physics and Astronomy the University of Birmingham Edgbaston Birmingham B15 2TT UK College of Food science and {2. Ocean University of China Qingdao 266003 China

Self-assembly of polystyrene spheres guided by patterned n-type InP substrates has been investigated. InP surfaces were patterned using a variety of methods including wet chemical etching,sputter coating,thermal evaporation,and photo lithography. The self-assembly of polystyrene spheres depended on the appearance of patterns and was affected by the deposition techniques (sputter coating and thermal evaporation) of Au micro-squares. SEM and AFM were used to characterize the surface morphologies.

关键词： self-assembly polystyrene spheres pattern InP surface

Solvothermal synthesis and luminescence properties of CdS:Mn nanorods

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science china Chemistry 2009年第12期52卷 2134-2140页

作者： cao lixin QU Hua {2.N DaKe {2. ge liu wei {2.N YuanGuang institute of material {2. and engineering Ocean University of ChinaQingdao 266100China

CdS:Mn nanorods have been produced via a solvothermal approach in the nonaqueous solvent of ethylenediamine. An absolutely dominant single Mn2. emission originating from the d-d (4T1-6A1) transition was obtained in CdS:Mn nanocrystals at room temperature. The effects of varying reaction temperature, molar ratio of S/Cd, and reaction time on the crystallinity and luminescence of CdS:Mn nanocrystals were systematically investigated. 1% Mn2.-doped CdS nanorods without any other additives were synthesized at 130°C for 10 h with an S/Cd molar ratio of 2.1. They show a rod-like shape, and their luminescence intensity around 593 nm is almost the strongest of all the nanorod samples investigated. CdS:Mn nanorods promise potential applications in nanoscale electronic and photonic devices.

关键词： CdS:Mn nanorod luminescence

Microemulsion synthesis and photocatalytic activity of visible light-active BiVO_4 nanoparticles

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science china Chemistry 2011年第5期54卷 724-729页

作者： liu wei WANG XiangFei {2. lixin su ge ZHANG Lan WANG Yong Gang institute of materials {2. and engineering Ocean University of ChinaQingdao 266100China

A water-in-oil microemulsion made up of a cyclohexane/n-hexyl alcohol/Polyethylene glycol tertoctylphenyl/aqueous solution including Bi3+ and VO+3 ions yields the spherical BiVO4 precursors with the size from 5 to 300 nm. Well-crystallized monoclinic scheelite BiVO4 particles with nanometer or micrometer size are fabricated in control by heating microemulsion precursors under various temperatures. The corresponding nucleation and growth process of as-prepared samples has also been investigated via TEM,which demonstrates the detailed morphological evolution of nuclei inside the precursors. As-prepared BiVO4 photocatalysts exhibit enhanced photocatalytic activity under visible-light irradiation in comparison with the bulk BiVO4 prepared by solid-state reaction. The highest RB degrading efficiency of 98% in 180 min under visible-light irradiation is observed for the sample calcined at 600 °C.

关键词： bismuth vanadium microemulsion chemical synthesis photochemistry

Electrodeposition in organic system and properties of NiO electrochromic films

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science china(Technological sciences) 2012年第6期55卷 1545-1550页

作者： su ge SONG MeiQin suN WuZhu cao lixin liu wei MA DeWen CHEN Na ZHAO LiLi WANG Jing liu XiaoYun institute of material {2. and engineering Ocean University of China Qingdao 266100 China

By electrodeposition in organic system,NiO films with reversible electrochromic property were ***-doped tin oxide glass slices were used as substrates,*** voltammetry and ultraviolet-visible transmission spectroscopy were adopted to study the electrochromic properties of the *** resolution transmission electron microscopy(HRTEM) was employed to analyze the composition and structure of the *** is found that the films are composed of fine NiO crystal grains of a few nanometers in diameter,endowing them with large visible light transmittance variation,rapid switch rate(*** response time) between the bleached and colored *** cycling durability reached 6000 cycles.

关键词： NiO film electrodeposition in organic system electrochromic properties