Nanocomposites Raman bands

Ergungor describes the application of on-line Raman spectroscopy and neural networks to the simultaneous prediction of temperature and crystallinity of nylon-6 nanocomposites as a function of cooling rate. The authors prefer their neural network approach because they make use of information in the entire spectrum rather than from a few bands as most studies have done.84 Van Wijk etal. of Akzo Nobel obtained a patent on the use of a Raman spectrum of a polymeric fiber to determine dye uptake and other structural or mechanical properties based on previously developed models.85... 

The Raman spectrum of the product of plasma spraying of nanodiamonds shows the formation of well-defined carbon onions (band at 1571 cm-1) and defective carbon onions (1592 cm-1).288 Raman spectroscopy was used to follow the effects of heavy-ion irradiation on nanocomposite carbon films.289 Laser-grown carbon microfibres were characterised by Raman microfibres,290 as were giant fullerene-like hollow spheres generated from C60 by compression at 57 GPa.291... 

Raman spectra showed that the diamond phonon line broadening started to show up even at 5 seem of TMS flow rate indicating the influence of increasing P-SiC Volume% in the films with an increase in TMS flow rate. FTIR measurements illustrated that greater transverse optic phonon (TO) band intensity obtained from the samples deposited with greater TMS concentration showed qualitatively the presence of laiger volume of p-SiC in the films. As an example, FTIR speara obtained from two different diamond/p-SiC nanocomposite films deposited on W substrates are shown in Fig. 3. Additionally, quantitative compositional analysis (RBS measurements EPMA) showed that the content of p-SiC in the films corresponds almost linearly to the TMS concentration in the gas phase during the film deposition. 

The stability of finely dispersed suspension is determined on the optical density. The time of the suspension optical density conservation defines the stability of suspension. The activity of suspension is found on the bands intensity changes by means of IR and Raman spectra. The intensity increasing testify to transfer of NS surface energy vibration part on the molecules of medium or composition. The line speading in spectra testify to the growth of electron action of nanocomposites with medium molecules. Last fact is confirmed by x-ray photoelectron investigations. 

The IR spectra of diamond-like carbon (DLC) films from dielectric barrier discharge plasma showed the presence (vCH) of CH3, CH2 and CH units in the approximate ratios 10 21 69. IR and Raman spectra were used to characterise DLC films on stainless steel or silicon substrates. Transmission IR spectra included bands due to v, and VasCH2 of sp CH2 units at 2870 and 2960 cm respectively. The FTIR spectrum of a diamond-like nanocomposite (DLN) film formed by thermally-activated CVD on a silicon substrate showed the presence of a diamond-like a-C a-Si 0 network. Several other papers described vibrational spectroscopic studies on diamond-like materials. ... 

The synthesis, upscaling and storage of the hybrid sol-gel materials can be controlled by applying different spectroscopic (e.g. RAMAN-, IR- and NMR-spectroscopy) and analytical (e.g. SEC, XPS) methods [10]. As shown in Fig. 6.4, the synthesis of such a hybrid nanocomposite coating is controlled by RAMAN spectroscopy. The epoxy-groups linked to the silanes which are contained in the system (band at 1258 cm [10]) are still present after the hydrolysis of the alkoxy silane groups, while... 

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