共搜索到2193条信息，每页显示10条信息，共220页。用时：0小时0分0秒405毫秒
P-doped Germanium Nanowires with Fanobroadening in Raman Spectrum何亮,XIONG Biao,ZHOU Peng,LUO Wen,SONG Peishuai,WANG Xukun,HAO Zhimeng,YANG Xiao,NIU Chaojiang,TIAN Xiaocong,YAN Mengyu,麦立强State Key... were characterized by scanning electron microscopy(SEM),the P-doping was verified by micro Raman spectroscopy via measuring the P local vibrational peak(342-345 cm-1) and asymmetric broadening of Ge-Ge......
(SAZ) glass was investigated by Raman, IR, XRD and TEM techniques. The results show that the sample heated at 900 ℃ is still in amorphous and the Raman peaks are broad and weak around about 460, 600 and 800 cm-1. Phase segregation occurs at 900-920 ℃, resulting in the formation of Si-rich and Al, Zr-rich regions. The Raman peaks are stronger and there are two additional peaks around about 148......
(RHF)自洽场方法和基组6-31G(d)对其进行优化,在相同基组和方法条件下,计算其拉曼振动频率及其拉曼活性,将实验结果与计算值进行对比分析.结果表明,拉曼位移能够准确反映微观环境的差异或超分子聚集数,即随超分子聚集数的增加,Al-F对称伸缩振动频率的计算值越接近实验值. 关键词:氟铝酸盐；离子团簇；微环境；拉曼光谱 中图分类号:O 657.37 Characteristic Raman...) Abstract: The Raman spectra of several typical crystals of alkali fluoroaluminate system were studied. Ab initio calculation of quantum chemistry was used to construct several super molecule model......
: The fabrication and characteristics of spindle Fe2O3@Au core/shell particle were investigated, and the effect of the core/shell nanoparticles as the surface enhanced Raman spectroscopy (SERS)-active... characterization show that the core/shell particles with the original shape of the Fe2O3 particles are obtained and these surfaces are covered by Au shell completely. The surface enhanced Raman spectrum......
a轴取向YBa2Cu3O7-x薄膜的制备及其Raman光谱研究 张鹏翔1,黄宗坦2,刘勇1,李国桢2 (1.材料科学与工程系,云南工业大学,昆明,650051;2.昆明物理研究所,昆明,650051) 摘要:采用直流磁控溅射法在SrTiO3(100)衬底上制备a轴取向的YBa2Cu3O7-x薄膜,用四引线法测量R-T曲线Tc0=86K.对于YBa2Cu3O7-x薄膜进行喇曼光谱测量,发现0(4)振动的声子峰(~500cm-1)强度远远大于0(2)-0(3)反相振动的声子峰(~340cm-1)强度,应用群论分析证明薄膜主要是沿a轴生长的.在较低的衬底温度下( 关键词:直流磁控溅射; 高温超导薄膜; 喇曼光谱; [全文内容正在添加中] ......
金刚石烧结体残余应力的Raman表征贾洪声1,贾晓鹏2,马红安21. 吉林师范大学功能材料物理与化学教育部重点实验室2. 吉林大学超硬材料国家重点实验室摘 要:通过采用微区拉曼光谱(micro-Raman spectroscopy)测试了不同类型金刚石烧结体的残余应力形式及大小.结果表明,金刚石复合片(PDC)存在不同形式的残余应力(压应力和拉应力),金刚石烧结体径向区域的残余应力为中心高,边缘低;而金刚石球齿应力分布规律不明显,数值亦差别巨大.综上分析,金刚石制品应力分布不均匀主要是由于烧结过程中温度梯度所致.由此,控制高压烧结腔体温场的均一性,是改善残余应力的有效途径.关键词:金刚石;残余应力;拉曼光谱;温度梯度;......
掺氮类金刚石薄膜激光退火的Raman光谱分析 汤定元1,夏义本2,李志锋1,郑国珍1,史伟民3,居建华3,黄志明1,张伟丽3,王林军3 (1.中国科学院上海技术物理研究所 ,;2.上海大学材料科学与工程学院,上海 201800;3.上海大学材料科学与工程学院,) 摘要:采用显微拉曼光谱研究了掺氮的类金刚石薄膜,该薄膜分别经过能量密度为300,750和1500W/mm2氩离子激光的退火处理.分析结果表明氮原子在类金刚石薄膜中形成了C－N键制约了C－H键的形成.由于C－N键的键能比C－H键的键能大得多,因此在激光退火过程中C－N键不易分解.所以随着氮含量的增加,类金刚石薄膜的激光退火后石墨化程度明显降低,具有比较好的热稳定性.而非掺氮的类金刚石薄膜由于C－H键含量比较高,因此激光退火后容易石墨化. 关键词:类金刚石薄膜; 激光退火; 拉曼光谱; 热稳定性; [全文内容正在添加中] ......
growth of silver nanoparticle on glass substrates and its surface-enhanced Raman scattering YI Zao1, 2, LI Kai1, HAN Shang-jun1, NIU Gao1, YI You-gen2, CHEN Shan-jun1, 3, LUO Jiang-shan1, TANG..., China; 3. Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China) Abstract: A novel solid substrate with high surface-enhanced Raman scattering (SERS) activity......
by Czochralski method and polarized into single ferroelectrics domain along c-axis. The properties of KLN and Ce:Nd:KLN crystals, such as Curie temperature, Raman spectra, exponential gain... crystal sheet effect of Ce:Nd:KLN crystal was also discussed. Key words:Ce:Nd:KLN crystal; photorefractive properties; Raman spectra; rare earths; [全文内容正在添加中] ......
高温高压下利用金刚石压腔实验技术对材料Raman光谱的研究马艳梅,李芳菲,李敏,崔启良,邹广田吉林大学超硬材料国家重点实验室摘 要:金刚石对顶砧装置(diamond anvil cell,DAC)是静态超高压装置的一种,由于金刚石具有高的硬度和良好的透光性,因此这种装置所实现的压力和能测量物性的种类都优于其他高压装置.Raman光谱是表征物质结构及其变化的一种重要手段,DAC超高压实验技术与激光Raman光谱测试方法相结合,为高压下物质结构相变研究提供了一种有效途径.实验利用金刚石压腔实验技术在高温高压条件下对氧化镓,硫酸锶固体材料进行了Raman光谱的测量.关键词:金刚石压腔实验技术;高温高压;Raman光谱;......
