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| 1 | Size-tunable synthesis of gold nanorods using pyrogallol as a reducing agent显示文摘A novel and facile seed-mediated method for the preparation of monodispersed gold nanorods(GNRs) is presented by introducing pyrogallol as a reductant. Fast Fourier transformation of high-resolution transmission electron microscopy reveals that the synthesized GNRs are single crystalline. The longitudinal surface plasmon resonance of GNRs can be finely tuned by varying silver ion concentrations or seed amounts. Also, both thick(diameter >30 nm) and thin(diameter <10 nm) GNRs with exceptional monodispersity can be well prepared by this method. These findings indicate that this method has a greater performance in controlling the morphology of GNRs than that of traditional approach with ascorbic acid as a reductant. | Yuanfu Huang Kai Xia Nongyue He Zhuoxuan Lu Liming Zhang Yan Deng Libo Nie | 2015 | Science China Chemistry2015，58，11： | 3 |
| 2 | YMn_(2)O_(5)电子结构及光学性质的第一性原理研究显示文摘采用基于密度泛函理论的第一性原理GGA+U方法研究了YMn2O5的能带结构、态密度.Mulliken电荷布居和光学性质,计算结果表明:YMn_(2)O_(5)为间接带隙半导体,理论禁带宽度为0.927 eV;电荷密度图和布居分析可知,YMn_(2)O_(5)为离子和共价兼有的化合物,Mn 3d轨道与O2p轨道发生了sp^(3)轨道杂化,易形成四面体结构;利用计算的能带结构和态密度分析了YMn_(2)O_(5)的光学性质,该材料的静态介电常数值为5.72. | 时军 王晶 何慧芬 于洪涛 | 2021 | 大连交通大学学报2021，42，2： | 1 |
| 3 | 低温固相法合成YMn_2O_5纳米粉及其磁性能显示文摘采用低温固相反应法制备前驱体,经煅烧获得YMn2O5纳米粉体。用Fourier红外(FTIR)光谱仪和热重/差示扫描量热法分析前驱体的组成和热分解过程,用X-射线衍射仪和透射电子显微镜分析合成粉体的物相组成和形貌,并研究其磁学性能及磁性离子的价态分布。结果表明:经800℃煅烧可获得较纯的YMn2O5纳米粉体,尺寸约为40~50 nm。该粉体在低温下以反铁磁有序为主,同时呈现出弱的铁磁性,二者相互竞争,导致团簇玻璃态行为产生。粉体中不均一的磁结构主要归因于Mn3+/Mn4+的混价结构。 | 马妍 邹千 王玺堂 王周福 刘浩 刘奇 | 2016 | 硅酸盐学报2016，44，9： | 1 |
| 4 | Characterization of YSZ Ceramic Nanopowders Synthesized at Different Temperatures via Polyacrylamide Gel Method显示文摘Tetragonal zirconia (T-ZrO2) ceramic nanopowders stabilized with 3 mol% Y2O3 were synthesized via polyacrylamide gel method, using ZrOCl2?8H2O and Y(NO3)3?6H2O as raw materials. The effect of temperature on phase composition and morphology of YSZ nanopowders and sintering behavior of YSZ ceramics was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Vickers hardness tester. The aging-resistance of YSZ ceramics was measured by means of aging experiments. The results demonstrated that the phase composition of YSZ ceramic nanopowders had no obvious change and it was composed of T-ZrO2. Particle size of well-dispersed YSZ ceramic nanopowders increased from 17 to 35 nm with increasing calcining temperature from 600 to 800 ℃. There was noticeable negative correlation between calcining temperature and the relative density of YSZ ceramic at the same sintering temperature. The aging experiments showed that water vapor facilitated tetragonal to monoclinic phase transformation, and the sample that had smaller grain size exhibited better aging-resistance. It can be concluded that when the calcining temperature is 600 ℃ and sintering temperature is 1550 ℃, the relative density and hardness of YSZ ceramic arrive at the peak of 96.64% and 11.135 GPa respectively, and it has less microcracks and excellent aging-resistance. | 刘婷 陈伟东 JU Hongmin YAN Shufang MA Wen | 2020 | Journal of Wuhan University of Technology(Materials Science)2020，35，3： | 1 |
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