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本文探讨利用半透膜法在Raman探针上进行信号增强的技术。实验表明,这种技术不仅不影响样品在Raman探针上的观察定位,而且能使样品的Raman信号增强10倍以上,很适合于研究矿物气液包裹体中的H2O、CH4、N2及CO2等这些只有很弱的Raman光谱信号的样品。本文还讨论了Hg对气体分子Raman光谱的增强效应。 相似文献
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Acquiring detail knowledge of the situation about release of medicial liquid is a key problem in clinical practice. By means of imitating the condition in the human body, the authors determined the osmotic velocity of anticarcinogen, antituberculotic, antibiotic and other medicines in porous ceramic tubes. In this paper, the methods to determine the osmotic velocity of anticarcinogen and to calculate the experimental data are mainly introduced. 相似文献
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本工作用分析纯LiCO3,Fe2O3和NH4H2PO4制得了20Li2O-xFe2O3-(80-x)P2O5系统玻璃,并应用红外和穆斯堡尔谱对其结构和铁的化学结合状态进行了研究。结果表明,玻璃中存在Fe(2+)和Fe(3+)离子,Fe(2+)的配位数为6,而Fe(3+)有4和6两种配位数。随Fe2O3含量的增加,Fe(2+)/Fe比值减少,而Fe(3+)(4配位)/Fe增加,发生[FeO6]到[FeO4]的配位变化,并且出现了焦磷酸盐基团的振动光谱.显然,玻璃的性质与Fe(2+)/Fe和Fe(3+)/Fe比值有关。 相似文献
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Raman and IR spectra of Nb-dopedPTC Ba_(1-x)Pb_xTiO_3, semiconducting ceramics (x=0, 0.28, 0. 296, 0. 313, 0. 330, 0. 370 ) have been neasured,and mode assignments of Raman scattering frequenciesand itfrared absorption peaks have been made at roomtemperature. The influence of Pb~(2 ) ions content on resis-tivity temperature characteristics and vibration spectrafor the Ba_(1-x)Pb_xTiO_3 ceramics have been discussed,andthe temperature dependence of the Raman spectra in te-.tragonal and cubic phases have been investigated from25 to 340℃. The results indicated that the Raman spec-tra of the paraelectric phase above Curie point are obvi-ously different from that of ferroelectric phase belowCurie point are obviously different from that of ferro-electric phase below Curie point for all the samples. Curiepoint of each sample, which is determined by resistivity-temperature characteristic measurment, is in good agree-ment with the results of Raman analysis. The ferroelec-tric phase transition in the PTCR Ba_(1_x) 相似文献