Raman scattering from Si-implantation-amorphized and subsequently thermally recrystallized silicon on sapphire (SOS) shows that optical phonon frequencies of silicon well correlate with the recrystallization temperature rather than the epitaxial temperature. This implies that the strain in as-epitaxial SOS ...
The Raman spectra of Si nanocrystals are studied as a function of nanocrystal diameter using pseudopotential density functional theory and the Placzek approximation. Our calculations reproduce the redshift and broadening of the optical Raman peak with decreasing nanocrystal size, and calculated peak frequen...
举例:In order to obtain better confirmation on the presence of H4SiMo12O40, Raman spectroscopic investigation was also conducted, because Raman spectroscopy is a sensitive technique to study supported metal oxide and it is complementary to IR investigation. The Raman spectra of the MoVI@mSiO2 and ...
2. 金属氧化物晶相结构(相变等) Figure 1 XRD and Raman spectra of Anatase and Rutile Raman和XRD都可以用于氧化物晶相结构的分析。Figure 1所示为TiO2的两种不同晶型(锐钛矿和金红石)的XRD和Raman谱图,从图中可以很明显地看出锐钛矿和金红石的XRD和Raman存在很大的差异,因此通过Raman或者XRD都可以用来分辨其...
拉曼光谱(Raman Spectra),是一种散射光谱。拉曼光谱分析法是基于印度科学家C.V.拉曼(Raman)所发现的拉曼散射效应,对与入射光频率不同的散射光谱进行分析以得到分子振动、转动方面信息,并应用于分子结构研究的一种分析方法。 今天分享一些问答集锦,希望对你有帮助。
Raman spectra of eight polycrystalline apatites of the general formula La10xSi6yM′yO26 ±δ with M′ = Al or Fe were obtained at 300 K. Raman spectra of La10Si4Fe2O26 and La9.83Si4.5Al1.5O26 were investigated in the range 80–1000 K and 80–623 K, respectively. Tentative ...
UV Raman spectra of these samples indicate thatthe mixed phases ofanatase and rutilecoexistin the surface region.Namely, when the TiO2 sample is calcined at 700– 750 oC,the phase junctions betweenanatase and rutileare derived on the surface ofthe rutile TiO2,as characterized byUV Raman spectrosc...
内容提示: Raman Spectra of Quasi-Elemental Carbon James L. Lauer University of California, Sun Diego, Sun Diego, California I. INTRODUCTION Raman spectroscopy has been applied to the characterization of carbons since the discov- ery of the Raman effect in 1928 by C. V. Raman [I]. It is ...
The photoluminescence and the Raman spectra of the 1- and 2-LO phonons in cadmium sulphide (CdS) are studied under hydrostatic pressure up to 42 kbar at room temperature. The luminescence peak shifts to higher energy with increasing pressure and vanishes around 25 kbar, when a phase transition...
由于SWCNTs的发光范围集中在1.0 to 1.6 um, 所以有很大的应用前景.,(Arrows mean CNT band),LabRAM 系列可以共点测量 Raman 光谱和 PL光谱,794nm914nm CCD detector,1100nm1550nm InGaAs detector,激发光 : 785nm,Si片表面单根碳纳米管分布,SWNT spectra,262.9-270.6 cm-1,165.6-169.5 cm-1,157.8-161.7 ...