谷氨酸钠溶液514nm激光拉曼光谱受环境光影响的研究

探讨了环境光的存在对谷氨酸钠溶液的514nm绿色激光激发的拉曼光谱的影响。研究表明不同的环境光、自然光和室内荧光灯光均会对514nm激光拉曼光谱产生干扰,存在着特征干扰峰。自然阳光干扰较小;而荧光灯光表现为1127、2107cm^-1和2170cm^-1等3个明显尖锐的脉冲峰,不能忽略。建议在进行谷氨酸钠溶液514nm绿色激光拉曼光谱检测时,须在暗室或暗罩中进行,以完全隔离环境光的影响。     

玻璃和熔体包裹体中水含量的拉曼光谱定量测定方面的进展评述

This paper is focused on the progress in the determination of water in glasses and melt inclusions with Raman spectroscopy. Using the presented ＂Comparator Technique＂ the water content of a sample is determined by siruple comparison with a known standard. A calibration curve is not necessary. Furthermore, with this technique the water concentration in silicate melt inclusions can be determined without exposing the inclusions for measurements. This is very important for extremely water-rich melt inclusions, which would loose H2O on exposure.     

低压等离子体结合热解法制备金刚石膜

金刚石膜具有天然金刚石相拟的优异特性，预计会有十分广阔的应用前景，本文介绍了一种新颖的金刚石膜生长技术－强流电子增强化学气相沉积法，它结合了传统的热丝法和等离子体法各自的优点，成为一种具有较高生长速率，能够制备大面积均匀金刚石膜的技术，对用这种方法制备的金刚石膜进行了喇曼、扫描电镜和Ｘ－Ｒａｙ衍射分析，并对这项技术的优点作了阐述。     

金属光栅的表面拉曼散射

以纳米量级金履带矩形光栅为模型,研究了表面增强拉曼散射的特性。针对TM和TE模的入射光,采用严格的耦合波原理对金属表面衍射场进行计算。通过计算,具体讨论了光栅周期、占空比、深度以及入射光的波长和入射角对表面增强的影响。     

傅里叶变换红外光谱应用研究

结合笔者所做的部分工作,综述了博里叶交换红外光谱仪（PTIR）在材料科学、环境保护、矿物学、农业科学及医学等方面的应用情况.     

Algorithm-improved high-speed and non-invasive confocal Raman imaging of 2D materials

Confocal Raman microscopy is important for characterizing 2D materials, but its low throughput significantly hinders its applications. For metastable materials such as graphene oxide (GO), the low throughput is aggravated by the requirement of extremely low laser dose to avoid sample damage. Here we introduce algorithm-improved confocal Raman microscopy (ai-CRM), which increases the Raman scanning rate by one to two orders of magnitude with respect to state-of-the-art works for a variety of 2D materials. Meanwhile, GO can be imaged at a laser dose that is two to three orders of magnitude lower than previously reported, such that laser-induced variations of the material properties can be avoided. ai-CRM also enables fast and spatially resolved quantitative analysis, and is readily extended to 3D mapping of composite materials. Since ai-CRM is based on general mathematical principles, it is cost-effective, facile to implement and universally applicable to other hyperspectral imaging methods.     

同向抽运光纤拉曼放大器增益特性的数值仿真

利用数值仿真的方法,系统地研究了同向抽运光纤拉曼放大器的增益特性。由耦合微分方程出发,采用龙格库塔法的算法对增益特性进行数值仿真,详细而深入地分析了所有参量对增益的影响。结果表明：光纤损耗系数对增益有重要影响,通过对抽运光损耗系数和信号光损耗系数进行控制可以明显地改善同向抽运FF队的增益特性。因此,数值模拟的方法分析得更全面,为进一步的研究提供了参考。     

B2H6分子声子态及声子间耦合的群论分析与Mathematica应用

利用群论和对称性分析的方法研究了具有D3d对称性构型的B2H6分子的声子态及其声子间耦合等问题。研究发现,B2H6存在5种不同的声子态,它们分别具有D3d群下的a1g、a1u、a2u、eg与eu对称性,其中a2u与eu具有红外活性,a1g和eg具有拉曼活性,而a1u是非活性的;在B2H6的声子态中只有eg是活跃的声子态;活跃声子态eg与eg之间的耦合作用将会产生耦合声子态a1g和eg;B2H6分子的电声耦合作用一定会导致B2H6分子发生杨-泰勒畸变,畸变致使B2H6分子从D3d对称性降低到C2h对称性。     

激光烧结快速合成Al2（WO4）3材料

采用激光烧结快速合成方法合成了形貌良好的Al2(WO4)3材料。扫描电镜(SEM)发现合成物样品表面组织呈树枝状,具有定向生长的趋势。能量散射光谱(EDS)分析显示合成物内部成分分布均匀。X射线衍射(XRD)分析证实合成物主要是Al2(WO4)3材料。拉曼光谱分析说明在合适激光工艺参数下可避免原料挥发,使原料完全参与反应。     

红血细胞的拉曼光谱研究

对人体红血细胞进行了拉曼光谱的谱线测定,进而对谱线进行了初步指任和分析,由此得出红血细胞的基本特征,为疾病诊断提供初步的实验依据.