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Journal articles on the topic 'DSC raman spectroscopy'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

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1

Atef, Eman, Harsh Chauhan, Dev Prasad, Dunesh Kumari, and Charles Pidgeon. "Quantifying Solid-State Mixtures of Crystalline Indomethacin by Raman Spectroscopy Comparison with Thermal Analysis." ISRN Chromatography 2012 (February 6, 2012): 1–6. http://dx.doi.org/10.5402/2012/892806.

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This paper investigates Raman spectroscopy as a quick and reliable method to quantify the alpha (α) and gamma (γ) polymorphic forms of indomethacin compared to differential scanning calorimetry (DSC). Binary mixtures with different ratios of α and γ indomethacin were prepared and analyzed by Raman and DSC. The Raman method was found to be more reliable and superior compared to DSC. The partial conversion of the alpha to gamma polymorphic form during the DSC measurement was the major limitation for the use of full DSC as a quantitative method and resulted in difference between the calculated an

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T., B. Sundaresan. "Solid State Mixture Identification of Crystal Indomethacin by Spectroscopy Comparison with Thermal Analysis." International Journal of Trend in Scientific Research and Development 2, no. 6 (2018): 626–30. https://doi.org/10.31142/ijtsrd18583.

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This research investigates Raman spectroscopy as a quick and reliable method to quantify the alpha a and gamma polymorphic forms of indomethacin compared to differential scanning calorimetry DSC . Binary mixtures with different ratios of a and indomethacin were prepared and analyzed by Raman and DSC. The Raman method was found to be more reliable and superior compared to DSC. The partial conversion of the alpha to gamma polymorphic form during the DSC measurement was the major limitation for the use of full DSC as a quantitative method and resulted in difference between the calculated and meas

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3

Muresan-Pop, Marieta, Irina Kacsó, Xenia Filip, et al. "Spectroscopic and physical–chemical characterization of ambazone–glutamate salt." Spectroscopy 26, no. 2 (2011): 115–28. http://dx.doi.org/10.1155/2011/414103.

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Ambazone monohydrate C8H11N7S · H2O (AMB), a well-known antimicrobial compound, was used together with Glutamic Acid C5H9NO4(Glu) to obtain a new solid form using the solvent-drop grinding procedure. The screening of the new solid form was best achieved by the combined use of X-ray Powder Diffraction (XRPD) and several spectroscopic techniques (Fourier Transformed Infrared Spectroscopy (FTIR), X-ray Photoelectron Spectroscopy (XPS), Raman and13C-NMR spectroscopy) together with Differential Scanning Calorimetry (DSC), Differential thermal analysis and thermogravimetry (DTA–TGA). The combination

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4

Harju, Mauno E. E. "Solid-State Transition Mechanisms of Ammonium Nitrate Phases IV, III, and II Investigated by Simultaneous Raman Spectrometry and Differential Scanning Calorimetry." Applied Spectroscopy 47, no. 11 (1993): 1926–30. http://dx.doi.org/10.1366/0003702934066127.

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The solid-state transition mechanisms of ammonium nitrate IV, III, and II were studied by measuring samples simultaneously by Raman spectrometry and differential scanning calorimetry (DSC). The Raman instruments were a Fourier transform Raman spectrophotometer and triple monochromator Raman spectrophotometer with charge-coupled-device (CCD) detector. The spectral data of the transitions were collected simultaneously with the calorimetric data in the temperature-scanning mode of the calorimeter and then isothermally between transitions. The phase transition from phase IV to phase III occurred t

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Gotts, H. "Characterization of Process Induced Contamination and Residues on Semiconductor Components Via FTIR and Raman Microanalysis." Microscopy and Microanalysis 7, S2 (2001): 152–53. http://dx.doi.org/10.1017/s1431927600026830.

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FTIR and Raman microanalysis may be used as a powerful combination to determine the identity, and hence infer the source, of contaminant particles which diminish yields of semiconductor components and devices. The complimentarity of these techniques arises from the underlying spectroscopic selection rules.Vibrational spectroscopic techniques are commonly used to characterize the molecular structure of bulk organic materials. These bulk materials typically represent purified fractions of components which may be further investigated with various classical instrumental techniques such as Differen

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6

Sagitova, E. A., P. Donfack, K. A. Prokhorov, et al. "Sensitive temperature-dependent phase resolution of polyethylene-clay nanocomposites." Laser Physics 32, no. 8 (2022): 084009. http://dx.doi.org/10.1088/1555-6611/ac7334.

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Abstract With the help of spectroscopic and differential scanning calorimetry (DSC) techniques, we have studied conformational and phase reorganizations as function of temperature in intercalated polymer-clay nanocomposites based on low-, middle-, and high-density polyethylene (PE) matrices. We show that Raman spectroscopy is sensitive to structural changes appearing during heating at much lower temperatures (about 47 °C) in comparison to DSC measurements. In fact, in the melting region where DSC traces show endotherms, Raman spectra reveal dramatic changes in the phase and conformational comp

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7

Shiota, K., Y. Izato, and A. Miyake. "Analysis of guanylurea dinitramide pyrolysis using DSC/Raman spectroscopy." Journal of Analytical and Applied Pyrolysis 156 (June 2021): 105113. http://dx.doi.org/10.1016/j.jaap.2021.105113.

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8

Adichtchev, Sergey V., Konstantin A. Okotrub, Alexey M. Pugachev, Irina V. Zaytseva, and Nikolay V. Surovtsev. "Raman Spectroscopic Study of Phase Coexistence in Binary Phospholipid Bilayers." Applied Spectroscopy 75, no. 1 (2020): 87–93. http://dx.doi.org/10.1177/0003702820945764.

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Binary phospholipid bilayers composed of 1,2-dioleoyl-sn-glycero-3-phosphocholine and 1,2-palmitoyl-sn-glycero-3-phosphocholine (DPPC) were studied by Raman spectroscopy and differential scanning calorimetry (DSC). We examined features in Raman scattering spectra that are sensitive to the lipid phase and, therefore, could indicate the phase coexistence. It was found that the low-frequency half-width of half-maximum (LHWHM) of the 2850 cm−1 Raman line, corresponding to the symmetric CH2 stretching vibrations, unequivocally reveals the coexisting phospholipids in ordered and disordered conformat

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9

Thakur, Priya, Vimal Sharma, and Nagesh Thakur. "Exothermic behaviour of aluminium and graphene as a fuel in Fe2O3 based nanothermite." Zeitschrift für Naturforschung A 76, no. 8 (2021): 703–10. http://dx.doi.org/10.1515/zna-2021-0051.

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Abstract The main frontier of this research is to study the influence of multi-layer graphene (MLG) and aluminium as a fuel in Al/Fe2O3 and MLG/Fe2O3 nanothermites, fabricated by physical mixing and ultrasonication techniques. To study the structural and energy release properties, prepared samples were characterized by XRD, FESEM, EDS, FTIR, Raman spectroscopy and DSC. The X-ray diffraction (XRD) technique showed that all the phases remain intact during the synthesis. Field emission electron microscopy (FESEM) micrographs displayed the surface morphology of the samples, and besides this, energ

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Larosa, Claudio, Niranjan Patra, Marco Salerno, Lara Mikac, Remo Merijs Meri, and Mile Ivanda. "Preparation and characterization of polycarbonate/multiwalled carbon nanotube nanocomposites." Beilstein Journal of Nanotechnology 8 (September 27, 2017): 2026–31. http://dx.doi.org/10.3762/bjnano.8.203.

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A polymer nanocomposite was produced by ultrasonic-assisted dispersion of multiwalled carbon nanotubes (MWCNTs) in a polycarbonate matrix using p-xylene and dichloromethane as the solvents. The filler loading was varied from 1 to 3 wt % in order to examine the effect of MWCNTs on the structure and properties of the composites. The nanocomposites were characterized by DSC, DTA, TGA, UV–vis, FTIR and Raman spectroscopy to evaluate the changes induced by the filler in the polymer matrix. UV–vis, FTIR and Raman spectroscopy measurements confirmed the presence of the dispersed phase in the composit

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11

Berg, Rolf W., David H. Kerridge, and Peter H. Larsen. "NaNO2+ NaNO3Phase Diagram: New Data from DSC and Raman Spectroscopy." Journal of Chemical & Engineering Data 51, no. 1 (2006): 34–39. http://dx.doi.org/10.1021/je050105n.

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12

Mikolaszek, Barbara, Marzena Jamrógiewicz, Krystyna Mojsiewicz-Pieńkowska, and Małgorzata Sznitowska. "Microscopic and Spectroscopic Imaging and Thermal Analysis of Acrylates, Silicones and Active Pharmaceutical Ingredients in Adhesive Transdermal Patches." Polymers 14, no. 14 (2022): 2888. http://dx.doi.org/10.3390/polym14142888.

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Dermal or transdermal patches are increasingly becoming a noteworthy alternative as carriers for active pharmaceutical ingredients (APIs), which makes their detailed physicochemical evaluation essential for pharmaceutical development. This paper demonstrates mid-infrared (FTIR) and Raman spectroscopy with complementary microscopic methods (SEM, optical and confocal Raman microscopy) and differential scanning calorimetry (DSC) as tools for the identification of the state of model API (testosterone TST, cytisine CYT or indomethacin IND) in selected adhesive matrices. Among the employed spectrosc

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13

Sun, Ning, Jun Chao Wang, Chun Yun Feng, Yi Biao Li, Shao Hua Jiang, and Zhi Mou Wu. "Study on Preparation and Properties of Hyperbranched Polyurethane/Multi-Walled Carbon Nanotubes Composites." Advanced Materials Research 716 (July 2013): 103–8. http://dx.doi.org/10.4028/www.scientific.net/amr.716.103.

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With the Grafting to method, the hyperbranched polyurethane/multi-walled carbon nanotubes composites (MWNT-HBPU) was prepared. The reaction mechanism was covalently grafting hyperbranched polyurethane to multi-walled carbon nanotubes,through the reaction of the isocyanate groups of multi-walled carbon nanotubes (MWNT-NCO) and the hydroxyl groups of homemade hyperbranched polyurethane (HBPU). The structure and properties of the composites was studied by Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy (Raman), Thermal gravimetric analysis (TG) and Differential scanning calori

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Minogianni, Chrysa, Konstantinos G. Gatos, and Costas Galiotis. "Estimation of Crystallinity in Isotropic Isotactic Polypropylene with Raman Spectroscopy." Applied Spectroscopy 59, no. 9 (2005): 1141–47. http://dx.doi.org/10.1366/0003702055012681.

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The Raman spectrum of isotactic polypropylene (iPP) has been found to exhibit vibrational peaks in the region of 750 to 880 cm−1 that are sensitive to the degree of crystallinity. These features are broadly assigned to various modes of methyl group rocking, ρ(CH2), and there have been various attempts to assess crystallinity based on the integrated intensities of these bands. Various vibrational analyses performed in the past in combination with experimental studies have concluded that the presence of crystalline order with trans-gauche conformation gives rise to a peak at 809 cm−1, which is a

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15

Sprunt, John C., and Upali A. Jayasooriya. "Simultaneous FT-Raman Differential Scanning Calorimetry Measurements Using a Low-Cost Fiber-Optic Probe." Applied Spectroscopy 51, no. 9 (1997): 1410–14. http://dx.doi.org/10.1366/0003702971942132.

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A low-cost fiber-optic probe was constructed and used to couple an FT-Raman spectrometer to a differential scanning calorimeter (DSC). The utility of this system is demonstrated by the investigation of the different phases of ammonium nitrate.

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ARAÚJO, E. B., E. IDALGO, A. P. A. MORAES, A. G. SOUZA FILHO, and J. MENDES FILHO. "PHYSICAL PROPERTIES OF TELLURITE GLASSES PREPARED UNDER DIFFERENT THERMAL HISTORIES." Modern Physics Letters B 24, no. 06 (2010): 527–37. http://dx.doi.org/10.1142/s0217984910022585.

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Tellurite glasses were prepared with identical 20 Li 2 O -80 TeO 2 nominal compositions but with different thermal histories. Differential scanning calorimetry (DSC), X-ray diffraction (XRD) and Raman spectroscopy techniques were used to understand the effects of the thermal histories on the thermal and structural properties of these glasses. It was observed that investigated properties depend strongly on the thermal histories. DSC results suggested that annealing immediately after quenching at temperatures around the glass transition temperature (Tg) and for longer times is favorable for prod

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17

García-Manrique, Juan A., Bernabé Marí, Amparo Ribes-Greus, et al. "Study of the Degree of Cure through Thermal Analysis and Raman Spectroscopy in Composite-Forming Processes." Materials 12, no. 23 (2019): 3991. http://dx.doi.org/10.3390/ma12233991.

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The curing of composite materials is one of the parameters that most affects their mechanical behavior. The inspection methods used do not always allow a correct characterization of the curing state of the thermosetting resins. In this work, Raman spectroscopy technology is used for measuring the degree of cure. The results are compared with conventional thermal gravimetric analysis (TGA), differential scanning calorimetry (DSC), and scanning electron microscope (SEM). Carbon fiber specimens manufactured with technologies out of autoclave (OoA) have been used, with an epoxy system Prepreg Syst

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18

Svoboda, Roman, Nicola Koutná, Magdalena Hynková, and Marek Pakosta. "In Situ Raman Spectroscopy as a Valuable Tool for Monitoring Crystallization Kinetics in Molecular Glasses." Molecules 29, no. 19 (2024): 4769. http://dx.doi.org/10.3390/molecules29194769.

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The performance of in situ Raman microscopy (IRM) in monitoring the crystallization kinetics of amorphous drugs (griseofulvin and indomethacin) was evaluated using a comparison with the data obtained via differential scanning calorimetry (DSC). IRM was found to accurately and sensitively detect the initial stages of the crystal growth processes, including the rapid glass–crystal surface growth or recrystallization between polymorphic phases, with the reliable localized identification of the particular polymorphs being the main advantage of IRM over DSC. However, from the quantitative point of

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19

Joshi, Prakash. "Characterization of Bamboo Based Carbon Powder Applicable for Fabrication of Low-Cost Counter Electrodes of Dye-Sensitized Solar Cells." Tribhuvan University Journal 32, no. 1 (2018): 1–8. http://dx.doi.org/10.3126/tuj.v32i1.24757.

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Low-cost carbon powder prepared by carbonization of bamboo wood was characterized by means of X-rays diffraction (XRD) and Raman spectroscopy. The structural analysis of the carbon powder shows that the material is the composite of amorphous and graphitic forms of carbon. Furthermore, the carbon powder was used as the counter electrode material of dye-sensitized solar cell (DSC) and the electric property of the bamboo carbon based counter electrode was investigated by obtaining current-voltage (I-V) curve of the DSC.

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20

Igarashi, K., K. Tajiri, Y. Tai, and S. Tanemura. "Structural study by DSC, SAXS, and Raman spectroscopy of silica aerogel." Zeitschrift f�r Physik D Atoms, Molecules and Clusters 26, S1 (1993): 207–9. http://dx.doi.org/10.1007/bf01425666.

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21

Susilo, Robin, John A. Ripmeester, and Peter Englezos. "Characterization of gas hydrates with PXRD, DSC, NMR, and Raman spectroscopy." Chemical Engineering Science 62, no. 15 (2007): 3930–39. http://dx.doi.org/10.1016/j.ces.2007.03.045.

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22

Soutzidou, Maria, Alexandros Panas, and Kyriakos Viras. "Differential scanning calorimetry (DSC) and Raman spectroscopy study of poly(dimethylsiloxane)." Journal of Polymer Science Part B: Polymer Physics 36, no. 15 (1998): 2805–10. http://dx.doi.org/10.1002/(sici)1099-0488(19981115)36:15<2805::aid-polb14>3.0.co;2-l.

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23

Lavra, T. C. C., L. A. Silva, K. S. B. Cavalcante, K. L. L. Marinho, B. A. M. Figueira, and J. M. Rivas Mercury. "Microwave radiation influence on the thermal and spectroscopic properties of Na-birnessite-type material." Cerâmica 65, no. 376 (2019): 547–53. http://dx.doi.org/10.1590/0366-69132019653762653.

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Abstract The aim of this work was to study the effect of the microwave radiation on the thermal and spectroscopic features, as well as about arrangement (order-disorder) and morphological properties, of the layered manganese oxide with birnessite-type structure. The route employed to obtain Na-birnessite matrix was redox precipitation. The products were characterized by X-ray diffraction, thermal analysis (TG-DTG-DSC), infrared (FTIR) and Raman spectroscopy, scanning electron microscopy (SEM) and nitrogen adsorption-desorption technique. The results showed that microwave radiation influenced i

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Broadhurst, C., Walter Schmidt, Jianwei Qin, Kuanglin Chao, and Moon Kim. "Continuous Gradient Temperature Raman Spectroscopy of Fish Oils Provides Detailed Vibrational Analysis and Rapid, Nondestructive Graphical Product Authentication." Molecules 23, no. 12 (2018): 3293. http://dx.doi.org/10.3390/molecules23123293.

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Background: Gradient temperature Raman spectroscopy (GTRS) applies the continuous temperature gradients utilized in differential scanning calorimetry (DSC) to Raman spectroscopy, providing a new means for rapid high throughput material identification and quality control. Methods: Using 20 Mb three-dimensional data arrays with 0.2 °C increments and first/second derivatives allows complete assignment of solid, liquid and transition state vibrational modes. The entire set or any subset of the any of the contour plots, first derivatives or second derivatives can be utilized to create a graphical s

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Wu, Jiarui, Qinhan Chen, Aobin Han, et al. "Fabrication of Antibacterial Poly(ethylene terephthalate)/Graphene Nanocomposite Fibers by In Situ Polymerization for Fruit Preservation." Molecules 30, no. 15 (2025): 3109. https://doi.org/10.3390/molecules30153109.

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A novel polyester/graphene nanocomposite fiber was produced using the in situ polymerization protocol with carboxylated graphene and melt spinning technology. The resulting nanocomposite fibers were characterized by X-ray diffraction (XRD), Raman spectroscopy, differential scanning calorimeter (DSC), and scanning electron microscope (SEM). The fibers containing 0.2 wt% graphene fraction showed an excellent dispersity of graphene nanosheets in polymeric matrix. DSC test showed that the efficient polymer-chain grafting depresses the crystallization of PET chains. This graphene-contained PET fabr

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Kubataev, Z. Yu, M. M. Gafurov, K. Sh Rabadanov, A. M. Amirov, M. A. Akhmedov, and M. G. Kakagasanov. "THE INFLUENCE OF NANO-SIZED OXIDE FILLER ON THE STRUCTURE AND CONDUCTIVITY OF COMPOSITE (1–x) (LiClO4 –NaClO4) + xAl2O3." Электрохимия 59, no. 8 (2023): 474–80. http://dx.doi.org/10.31857/s0424857023080054.

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The physicochemical properties of the eutectic system 78.2LiClO4-21.8NaClO4 and its heterogeneous composites with nanosized aluminium oxide powder at various temperatures, phase states and concentrations of Al2O3 were studied by methods of Raman spectroscopy, differential scanning calorimetry (DSC) and impedance spectroscopy. The addition of Al2O3 leads to an increase in ionic conductivity and a decrease in activation energy. By the method of KRS spectroscopy it is shown that the addition of aluminum oxide leads to the formation of an amorphous phase due to the "destruction" of the crystalline

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Macasoi, Cristina, Viorica Meltzer, Ioana Stanculescu, Cosmin Romanitan, and Elena Pincu. "Binary Mixtures of Meloxicam and L-Tartaric Acid for Oral Bioavailability Modulation of Pharmaceutical Dosage Forms." Journal of Functional Biomaterials 15, no. 4 (2024): 104. http://dx.doi.org/10.3390/jfb15040104.

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Binary mixtures of active pharmaceutical ingredients (API) are researched to improve the oral bioavailability of pharmaceutical dosage forms. The purpose of this study was to obtain mixtures of meloxicam and L-tartaric acid because tartaric acid improves intestinal absorption and meloxicam is more soluble in a weakly basic environment. The mixtures in the 0–1 molar fraction range, obtained from solvent-assisted mechanosynthesis, were investigated by differential scanning calorimetry (DSC), Fourier Transform Infrared (FTIR) spectroscopy, Fourier Transform Raman spectroscopy (FT-Raman), X-ray po

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Paroli, Ralph M., Nancy T. Kawai, Ian S. Butler, and Denis F. R. Gilson. "Phase transitions in adamantane derivatives: 2-chloroadamantane." Canadian Journal of Chemistry 66, no. 8 (1988): 1973–78. http://dx.doi.org/10.1139/v88-318.

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The phase transition behaviour of 2-chloroadamantane, 2-C10H15Cl, has been investigated by differential scanning calorimetry (DSC), and FT-IR and Raman spectroscopy. Two transitions were detected by both DSC and vibrational spectroscopy at 231 and 178 K, on cooling, and at 242 and 227 K, on heating. The measured enthalpies were 8.3 kJ mol−1 for the first transition (phase I → phase II), and 0.47 kJ mol−1 for the second (phase II → phase III). The entropies were 35 and 2.3 J K−1 mol−1, respectively. These are similar to those observed for other 2-substituted adamantanes, but significantly diffe

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Quintana Mendoza, Jose H., J. A. Henao, Andrea P. Aparicio, and Arnold R. Romero Bohorquez. "X-ray powder diffraction data and characterization of Mirabegron." Powder Diffraction 32, no. 4 (2017): 290–94. http://dx.doi.org/10.1017/s0885715617001129.

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Mirabegron, (C21H24N4O2S), is a β3-adrenoceptor agonist approved in Japan, the USA, Canada and Europe, for the treatment of overactive bladder symptoms. There are no entries for this important active pharmaceutical ingredient in the Cambridge Structural Database or the Powder Diffraction File-4/Organics database. In this contribution, the powder diffraction pattern of Mirabegron, an unreported phase, are presented with a study by spectroscopy methods (Fourier-transform infrared spectroscopy [FT-IR] and RAMAN) and thermal analysis (thermogravimetric analysis [TGA]-differential scanning calorime

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Caetano, M., A. P. Ayala, J. Mendes Filho, S. Faudone, N. R. Sperandeo, and S. Cuffini. "In situX-ray diffraction, DSC and Raman spectroscopy thermal investigation of chlorpropamide." Acta Crystallographica Section A Foundations of Crystallography 61, a1 (2005): c337. http://dx.doi.org/10.1107/s0108767305085636.

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Kolgjini, Blerina, Gustaaf Schoukens, and Paul Kiekens. "Three-Phase Characterization of Uniaxially Stretched Linear Low-Density Polyethylene." International Journal of Polymer Science 2011 (2011): 1–7. http://dx.doi.org/10.1155/2011/731708.

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This study comprises a detailed morphological study of cold-drawn polyethylene monofilaments by Raman spectroscopy, differential scanning calorimetry (DSC) and X-ray measurements. The structure of the three-phase morphology of the linear low-density polyethylene monofilaments was investigated by combining these measurements. It was found that the most important structure variation was found in the intermediate or rigid amorphous phase, whereby the amounts of crystalline and amorphous phases were nearly constant and almost independent of the cold-draw ratio. The intermediate third phase contain

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Sedlak, Petr, Dinara Sobola, Adam Gajdos, Rashid Dallaev, Alois Nebojsa, and Petr Kubersky. "Surface Analyses of PVDF/NMP/[EMIM][TFSI] Solid Polymer Electrolyte." Polymers 13, no. 16 (2021): 2678. http://dx.doi.org/10.3390/polym13162678.

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Thermal treatment conditions of solid polymer polymer electrolyte (SPE) were studied with respect to their impact on the surface morphology, phase composition and chemical composition of an imidazolium ionic-liquid-based SPE, namely PVDF/NMP/[EMIM][TFSI] electrolyte. These investigations were done using scanning electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy, differential scanning calorimetry as well as X-ray photoelectron spectroscopy and time-of-flight secondary ion mass spectroscopy. A thoroughly mixed blend of polymer matrix, ionic liquid and solvent was d

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Huang, Yaohui, Ling Zhou, Wenchao Yang, et al. "Preparation of Theophylline-Benzoic Acid Cocrystal and On-Line Monitoring of Cocrystallization Process in Solution by Raman Spectroscopy." Crystals 9, no. 7 (2019): 329. http://dx.doi.org/10.3390/cryst9070329.

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Pure theophylline-benzoic acid cocrystal was prepared via slurry and cooling crystallization in solution to overcome the disadvantages of existing preparation methods. The target cocrystal was characterized by powder X-ray diffraction (PXRD), thermalgravimetric analysis (TGA), differential scanning calorimetry (DSC) and Raman spectroscopy. The slurry and cooling cocrystallization process in solution was monitored via on-line Raman spectroscopy. The results obtained from on-line Raman monitoring can exhibit the transformation process from raw materials (theophylline and benzoic acid) to cocryst

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Lesniak, Magdalena, Jacek Zmojda, Marcin Kochanowicz, et al. "Spectroscopic Properties of Erbium-Doped Oxyfluoride Phospho-Tellurite Glass and Transparent Glass-Ceramic Containing BaF2 Nanocrystals." Materials 12, no. 20 (2019): 3429. http://dx.doi.org/10.3390/ma12203429.

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The ErF3-doped oxyfluoride phospho-tellurite glasses in the (40-x) TeO2-10P2O5-45 (BaF2-ZnF2) -5Na2O-xErF3 system (where x = 0.25, 0.50, 0.75, 1.00, and 1.25 mol%) have been prepared by the conventional melt-quenching method. The effect of erbium trifluoride addition on thermal, structure, and spectroscopic properties of oxyfluoride phospho-tellurite precursor glass was studied by differential scanning calorimetry (DSC), Fourier-transform infrared (FTIR), and Raman spectroscopy as well as emission measurements, respectively. The DSC curves were used to investigate characteristic temperatures a

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Abbas, Bashar Khudhair, Sharudin Omar Baki, Fong Wai Leng, Haider Khudhair Abbas, Layth Al-Sarraj, and Mohd Adzir Mahdi. "Investigation of Structural, Thermal Properties and Shielding Parameters of Borosilicate Glasses Doped with Dy3+/ Tb3+ Ions for Gamma and Neutron Radiation Shielding Applications." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 80, no. 1 (2021): 50–61. http://dx.doi.org/10.37934/arfmts.80.1.5061.

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In this study, borosilicate host (H) and seven (S1-S7) samples are prepared by traditional melt-quenching technique. The samples are singly (S1, S2) and doubly (S3-S7) doped with deferent contents of Tb3+ and Dy3+ ions. All samples are analyzed and characterized by XRD (x-ray diffraction), ATR-FTIR (Attenuated total Reflectance-Fourier transform infrared) spectroscopy, TGA/DSC (Thermogravimetric analysis/Differential scanning calorimetry), and Raman spectroscopy. Moreover, the radiation shielding parameters of mentioned glasses such as mass attenuation (?/?), mean free path (MFP), and half-val

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Constantino, C. J. L., A. E. Job, R. D. Simões, et al. "Phase Transition in Poly(Vinylidene Fluoride) Investigated with Micro-Raman Spectroscopy." Applied Spectroscopy 59, no. 3 (2005): 275–79. http://dx.doi.org/10.1366/0003702053585336.

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The phase transition from the non-polar α-phase to the polar β-phase of poly(vinylidene fluoride) (PVDF) has been investigated using micro-Raman spectroscopy, which is advantageous because it is a nondestructive technique. Films of α-PVDF were subjected to stretching under controlled rates at 80 °C, while the transition to β-PVDF was monitored by the decrease in the Raman band at 794 cm−1 characteristic of the α-phase, along with the concomitant increase in the 839 cm−1 band characteristic of the β-phase. The α→β transition in our PVDF samples could be achieved even for the sample stretched to

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Wręczycki, Jakub, Dariusz M. Bieliński, Marcin Kozanecki, Paulina Maczugowska, and Grzegorz Mlostoń. "Anionic Copolymerization of Styrene Sulfide with Elemental Sulfur (S8)." Materials 13, no. 11 (2020): 2597. http://dx.doi.org/10.3390/ma13112597.

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The superior ability of thiiranes (episulfides) to undergo ring-opening polymerization (ROP) in the presence of anionic initiators allows the preparation of chemically stable polysulfide homopolymers. Incorporation of elemental sulfur (S8) by copolymerization below the floor temperature of S8 permits the placement of a large quantity of sulfur atoms in the polysulfide mainchain. The utility of styrene sulfide (2-phenylthiirane; StS) for copolymerization with elemental sulfur is reported here. A few polysulfides differing depending on the initial ratio of S8 to StS and copolymerization time wer

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Němec, Ivan, Zorka Macháčková, Přemysl Vaněk, and Zdeněk Mička. "Piperidinium Nitrate - Study of Thermal Behaviour and Vibrational Spectra." Collection of Czechoslovak Chemical Communications 71, no. 2 (2006): 207–14. http://dx.doi.org/10.1135/cccc20060207.

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Piperidinium nitrate was studied by FTIR and FT Raman spectroscopy in the range 100-4000 cm-1 at 300 K. On the basis of DSC measurements which exhibit two effects indicating phase transition at 256 and 295 K, FTIR spectra were recorded down to a temperature of 90 K. Discussion of the phase transition mechanism is based on the observed changes in the FTIR spectra during cooling of the compound.

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Zou, Guohong, Juan Shen, Peizhen Duan, Xu Xia, Rigui Chen, and Bo Jin. "Temperature-Sensitive Poly(N-isopropylacrylamide)/Konjac Glucomannan/Graphene Oxide Composite Membranes with Improved Mechanical Property, Swelling Capability, and Degradability." International Journal of Polymer Science 2018 (April 17, 2018): 1–10. http://dx.doi.org/10.1155/2018/7906747.

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Temperature-sensitive poly(N-isopropylacrylamide)/konjac glucomannan/graphene oxide (PNIPAM/KGM/GO) composite membranes were prepared by solution blending using calcium ions as a cross-linker. The composite membranes were characterized by Fourier-transform infrared spectroscopy (FT-IR), field-emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), Raman spectroscopy (Raman), and differential scanning calorimetry (DSC). The swelling, mechanical property, phase transformation behaviors, and enzymatic degradation activities were also determined. Results revealed that the phase tra

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Yordanova, Aneliya, Lyubomir Aleksandrov, Margarita Milanova, Reni Iordanova, Petia Petrova, and Nikolay Nedyalkov. "Effect of the Addition of WO3 on the Structure and Luminescent Properties of ZnO-B2O3:Eu3+ Glass." Molecules 29, no. 11 (2024): 2470. http://dx.doi.org/10.3390/molecules29112470.

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Glasses with the compositions in mol % of 50ZnO:(50 − x)B2O3:0.5Eu2O3:xWO3, x = 0, 1, 3, 5 and 10 were obtained by applying the melt-quenching method and investigated by Raman spectroscopy, DSC analysis and photoluminescence (PL) spectroscopy. Raman spectra revealed that tungstate ions incorporate into the base zinc borate glass as tetrahedral [WO4]2− groups, and octahedral [WØ4O2]2− species with four bridging and two non-bridging oxygen atoms. There are also metaborate, [BØ2O]− and pyroborate units, [B2O5]4−, in the glass networks. The glasses are characterized by good transmission in the vis

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Jeghnou, H., A. Ouasri, A. Rhandour, M. C. Dhamelincourt, P. Dhamelincourt, and A. Mazzah. "Structural phase transition in (n-C4H9NH3)2SiF6: DSC and Raman studies." Journal of Raman Spectroscopy 34, no. 2 (2003): 126–30. http://dx.doi.org/10.1002/jrs.964.

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de Jager, Henk-Jan, and Linda C. Prinsloo. "The dehydration of phosphates monitored by DSC/TGA and in situ Raman spectroscopy." Thermochimica Acta 376, no. 2 (2001): 187–96. http://dx.doi.org/10.1016/s0040-6031(01)00582-2.

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Kaczor, Daniel, Krzysztof Bajer, Aneta Raszkowska-Kaczor, Grzegorz Domek, Piotr Madajski, and Pawel Szroeder. "The Influence of Multiple Extrusions on the Properties of High Filled Polylactide/Multiwall Carbon Nanotube Composites." Materials 15, no. 24 (2022): 8958. http://dx.doi.org/10.3390/ma15248958.

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High filled polylactide/multiwall carbon nanotube composites were subjected to multiple extrusions using single-screw and twin-screw extruders. Samples of the processed composites were characterized by SEM, XRD, Raman, and FTIR spectroscopy. Thermal and rheological properties were investigated by DSC and MFR analyses. Subsequent extrusions resulted in decreased torque and process efficiency, which is a consequence of the viscosity reduction of PLA. Thermal and rheological properties of composites changed after each extrusion as well. As revealed by DSC analyses, cold crystallization temperatur

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Uchida, Tsutomu, Masafumi Nagayama, Kenji Yamazaki, Kazutoshi Gohara, and Amadeu K. Sum. "Raman spectra measurements on DEPC liposome and cell membrane of living neuron under xenon pressure." Canadian Journal of Chemistry 93, no. 8 (2015): 831–38. http://dx.doi.org/10.1139/cjc-2014-0542.

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The Raman spectra of liposomes were measured under xenon pressures and low temperatures to observe the spectra changes accompanying the gel to liquid crystalline phase transition of the liposomes. C–H stretching bonds of the lipids in the liposome were slightly red shifted at approximately 285 K and atmospheric pressure, which coincided well with the phase transition condition. This Raman peak shift was observed at lower temperatures and related linearly to the xenon pressures. The xenon pressure dependence on the phase transition temperature was in good agreement with the DSC measurements, an

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PÉREZ-TAVARES, J. A., R. PATAKFALVI, L. ORTIZ-FRADE, et al. "ACETYLACETONATE HYDROUS ZIRCONIUM(IV) COMPLEXES SUPPORTED ON HYDROPHILIC POLYMERS AS NEW SELECTIVE GROWTH PRECURSORS OF MONOCLINIC AND TETRAGONAL ZIRCONIUM OXIDE NANOCRYSTALS." Digest Journal of Nanomaterials and Biostructures 15, no. 1 (2020): 185–95. http://dx.doi.org/10.15251/djnb.2020.151.185.

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Pure ZrO2 nanocrystals were successfully prepared from three new complexes of hydrous zirconium acetylacetonate ([Zr2(AcAc)•4H2O]2, [Zr2(AcAc)-PEI•nH2O]2 and [Zr2(AcAc)- PDDAC•nH2O]2), obtained using solvothermal synthesis. The addition of poly(ethyleneimine) (PEI) and poly(diallyldimethylammonium chloride) (PDDAC) hydrophilic polymers as stabilizing agents, had impact on the size and crystalline phase of the calcinated products within a range of 300 to 800 °C, obtaining ZrO2 nanoparticles with tetragonal and/or monoclinic structure and diameters of 5 to 20 nm. The synthesized precursor comple

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Holubová, J., Z. Černošek, and E. Černošková. "The selenium based chalcogenide glasses with low content of As and Sb: DSC, StepScan DSC and Raman spectroscopy study." Journal of Non-Crystalline Solids 355, no. 37-42 (2009): 2050–53. http://dx.doi.org/10.1016/j.jnoncrysol.2009.05.067.

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Cai, Ke Feng, L. C. Zhang, and Q. Lei. "Preparation and Characterization of Sr, Ba Filled Type-I Ge Clathrate Single Crystals." Key Engineering Materials 336-338 (April 2007): 896–99. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.896.

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Sr or Ba filled type-I Ge clathrate single crystals were prepared using high pure elemental Ga, Ge, and Sr or Ba as the starting materials, and Ga as a flux. Powder X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), differential scanning calorimeter (DSC) were used to characterize the crystals, respectively. The results show that large and well-crystallized single crystals can be prepared under optimum synthesis condition. The composition of the crystals is in good agreement with the nominal composition (M8Ga16Ge30, M=Sr, Ba). Raman spectra of the single crystals were studied

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Generali, Luigi, Anastasiya Malovo, Giovanni Bolelli, et al. "Mechanical Properties and Metallurgical Features of New Green NiTi Reciprocating Instruments." Materials 13, no. 17 (2020): 3736. http://dx.doi.org/10.3390/ma13173736.

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To evaluate the properties of two nickel–titanium (NiTi) reciprocating endodontic instruments (commercially known as Procodile and Reziflow), a total of 40 size 25 and 0.06 taper new Procodile and Reziflow instruments (n = 20) were subjected to cyclic fatigue tests (60° angle of curvature, 5-mm radius) at 20 °C and 37 °C and a torsional test based on ISO 3630-1. The fracture surface of each fragment was examined. The morphological, mechanical, chemical, thermal, and phase composition characteristics of the files were investigated by field-emission gun scanning electron microscopy (FEG-SEM) equ

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Garbacz, Patrycja, Dominik Paukszta, Artur Sikorski, and Marek Wesolowski. "Structural Characterization of Co-Crystals of Chlordiazepoxide with p-Aminobenzoic Acid and Lorazepam with Nicotinamide by DSC, X-ray Diffraction, FTIR and Raman Spectroscopy." Pharmaceutics 12, no. 7 (2020): 648. http://dx.doi.org/10.3390/pharmaceutics12070648.

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The low water solubility of benzodiazepines seriously affects their bioavailability and, in consequence, their biological activity. Since co-crystallization has been found to be a promising way to modify undesirable properties in active pharmaceutical ingredients, the objective of this study was to prepare co-crystals of two benzodiazepines, chlordiazepoxide and lorazepam. Using different co-crystallization procedures, slurry evaporation and liquid-assisted grinding, co-crystals of chlordiazepoxide with p-aminobenzoic acid and lorazepam with nicotinamide were prepared for the first time. Confi

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Kondoros, Balázs Attila, Orsolya Laczkovich, Ottó Berkesi, and Zoltán Aigner. "Analytical Investigation of Cyclodextrin Complexation Using the Co-Grinding Technique in the Case of Terbinafine Hydrochloride." Proceedings 78, no. 1 (2020): 19. http://dx.doi.org/10.3390/iecp2020-08714.

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Recent scientific publications have already demonstrated that co-grinding appears to be an efficient, solvent-free technique for preparing cyclodextrin (CD) complexes and improving physicochemical properties (solubility, stability, etc.) of active ingredients. The improvement of solubility and dissolution rate could enhance the biopharmaceutical properties of the active ingredients in pharmaceutical products. In this study terbinafine hydrochloride (TER), an antifungal BCS II drug was chosen as a model drug. The aim of this study was the follow-through of inclusion complex preparation by co-gr

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