Studies on Raman Spectra of Cu2+ Ion Doped B2O3-K2O-ZnO-BaO Glasses

2017 ◽  
Vol 13 (1) ◽  
pp. 4495-4498
Author(s):  
L.S. Ravangave ◽  
G.N. Devde
Keyword(s):  
Raman Spectroscopy ◽  
Structural Properties ◽  
Raman Spectra ◽  
Experimental Technique ◽  
Room Temperature ◽  
Copper Ion ◽  
Membered Ring ◽  
Melt Quenching ◽  
Present Glass ◽  
Local Arrangement

Glasses with compositions 59B2O3-10K2O-(30-x)ZnO-xBaO-1CuO were prepared using melt quenching technique. The effect of BaO content in present glass system doped with copper ion in place of ZnO has been studied with respect to structural properties. Raman spectroscopy is an experimental technique appropriate for providing information about  the structure, local arrangement of the atoms in the present glasses. The Raman spectra of glasses were recorded at room temperature in the range 200-1800 cm-1 using a He-Ne excitation source having wavelength 632.81 nm. The Raman peaks appeared around 760 cm-1 assigned symmetric breathing vibrations of six-membered ring with both BO3 triangle and BO4 tetrahedral. The intensity of these peaks is slightly varied with the addition of BaO content while the broadness is found to be larger at 30 mol% of BaO than 30 mol% ZnO. This indicates that certain BO4 units could be preferentially converted while those in ring groups could be stabilized. Raman studies it is concluded that present glasses are composed of [BO4] and [BO3] units in metaborate, orthoborate, diborate groups.

scholarly journals Synthesis and Structural Properties of Nanocomposites Based on Synthetic Opals and Active Dielectrics

2019 ◽  
Vol 12 (1) ◽  
pp. 19
Author(s):  
Bilal Abu Sal
Keyword(s):  
Raman Spectroscopy ◽  
Single Crystals ◽  
Structural Properties ◽  
Raman Spectra ◽  
Phase Structure ◽  
Opal Matrix ◽  
X Ray Diffraction ◽  
X Ray ◽  
Crystal State ◽  
Synthetic Opals

This work is devoted to generalize and analyze the previouse results of new photonic-crystalline nanomaterials based on synthetic opals and active dielectrics. Data were characterized by X-ray diffraction and Raman spectroscopy. Active dielectrics infiltrated into the pores of the opal from the melt. The phase structure composition of the infiltrated materials into the pores of the opal matrix were analyzed. The results of x-ray diffraction and Raman spectra allowed to establish the crystal state of active dielectrics in the pores of the opal. The Raman spectra of some opal-active dielectric nanocomposites revealed new bands and changes in band intensities compared to the spectra of single crystals of active dielectrics. Further more, differences in band intensities in the spectra were measured at different spots of the sample‘s surface were observed. The revealed changes were attributed to the formation of new crystalline phases due to the injected dielectrics in opal pores.

Raman study of the structural properties of KNO3(II)

1977 ◽  
Vol 55 (7) ◽  
pp. 1242-1250 ◽  
Author(s):  
M. H. Brooker
Keyword(s):  
Single Crystals ◽  
Structural Properties ◽  
Raman Spectra ◽  
Excellent Agreement ◽  
Room Temperature ◽  
Group Analysis ◽  
Factor Group ◽  
Spectral Features ◽  
Space Group ◽  
Raman Study

Raman spectra of oriented single crystals of KNO3(II) have been recorded at 298 and 77 K. At both temperatures the data are in excellent agreement with the factor group analysis based on the generally accepted Pmcn space group. Additional spectral features observed near room temperature suggest the presence of a significant number of disordered nitrate groups on alternate lattice sites, although the majority of nitrate groups occupy the ordered sites. As the temperature is lowered, the disordered groups freeze out until near the temperature of reported electrical anomalies (213 K) only the ordered sites are occupied. Improved resolution has resulted in detection of a number of new spectral features while improved depolarization data have resulted in reassignment of several peaks.

scholarly journals Investigation of thermostability of Mo6S3I6 nanowires using Raman spectroscopy

2009 ◽  
Vol 63 (3) ◽  
pp. 217-220
Author(s):  
Jelena Todorovic ◽  
Dejan Djokic ◽  
Zorana Dohcevic-Mitrovic ◽  
Dragan Mihailovic ◽  
Zoran Popovic
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Room Temperature ◽  
Group Analysis ◽  
Temperature Treatment ◽  
Incident Laser ◽  
Chevrel Phase ◽  
Incident Laser Power ◽  
Raman Modes ◽  
Good Agreement

The thermostability (phase stability) of Mo6S3I6 nanowires was investigated by Raman spectroscopy, varying the incident laser power (1-9 mW) or by gradual heating of the sample from room temperature to 600?C. We have noticed 18 Raman modes in the room temperature Raman spectra, which is in good agreement with the factor group analysis prediction for P1 space group. We confirmed that the vibrations of Mo6S8 clusters dominate in vibrational properties of the Mo6S3I6 nanostructure, since nanowires Raman spectra are similar to Chevrel phase Raman spectra. During the temperature treatment, it was established that in the temperature range between 300 and 400?C a new Raman mode appeares. This mode can be ascribed to molybdenum oxide (MoO3). With further temperature increase, the intensity of this mode increases, drawing a conclusion that at temperature above 300?C the phase separation takes place in this system followed by a formation of oxide layer.

Synthesis and Studies of Ti1-xCoxO2 for Device Applications

2001 ◽  
Vol 690 ◽  
Author(s):  
A. Hidalgo ◽  
M.S Tomar ◽  
R.E. Melgarejo ◽  
R.S. Katiyar
Keyword(s):  
Raman Spectroscopy ◽  
Structural Properties ◽  
Structural Characterization ◽  
Room Temperature ◽  
Research Interest ◽  
X Ray Diffraction ◽  
X Ray ◽  
Is Research ◽  
Device Applications

ABSTRACTTi1-xCoxO2 material has reported to show ferromagnetosmat room temperature. Thus, there is research interest in synthesis and structural properties of thismaterial system. The material is synthesized using a soulution chemistry route. X-ray diffraction and Raman spectroscopy is used for the structural characterization.

Structural Study of Antimony Borate Glass System Doped with Transition Metal Ions Using Infrared and Raman Spectroscopy

2012 ◽  
Vol 501 ◽  
pp. 51-55 ◽  
Author(s):  
Eeu Tien Yew ◽  
Wan Ming Hua ◽  
Poh Sum Wong ◽  
Nur Amanina Mat Jan ◽  
Zuhairi Ibrahim ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Structural Properties ◽  
Borate Glass ◽  
Glass Network ◽  
Transition Metal Ions ◽  
Melt Quenching ◽  
Complementary Information ◽  
Structural Units ◽  
Infrared And Raman Spectroscopy ◽  
Ir And Raman

A series of Antimony Borate glass samples were investigated to determine the structural feature. The glass samples from the series of xSb2O3:(1-x)B2O3 with composition of 20≤x≤60 mol% and 0.6 Sb2O3:0.4B2O3:y with y is 0.01 mol% of Nb2O5, CuO, ZnO system have been prepared using melt-quenching technique. The structural properties of Sb2O3 host and the introduction of dopents onto the host sample has been investigated using Infrared and RAMAN Spectroscopy. The result of IR and Raman Spectroscopy revealed that the network structure of the studied glasses is mainly based on BO3 and BO4 units placed in different structural groups, the BO3 units being dominant. IR spectra obtained shows conversion of BO3 to BO4 units upon the introduction of Sb2O3 commonly known as boron anomaly effect. The glass network can be modified with the presence of Sb2O3 and activator ions. The significant behavior in Raman Spectra indicates the presence of boroxol groups consisting of pure BO3 groups and mixed BO3-BO4 structural units. This study shows that the vibrational spectroscopy (Infrared and Raman) provide useful method, and inter-complementary information about the structural properties of antimony modified borate glasses.

Raman spectra of charge transfer organic compounds: Conductors And Semiconductors

1995 ◽  
Vol 413 ◽  
Author(s):  
R. Gómez ◽  
R. Ridaura ◽  
M. Quintana ◽  
M. L. Marquina ◽  
V. Marquina ◽  
...  
Keyword(s):  
Thin Films ◽  
Raman Spectroscopy ◽  
Charge Transfer ◽  
Raman Spectra ◽  
Coordination Compounds ◽  
Room Temperature ◽  
Molecular Solids ◽  
Donor And Acceptor ◽  
Ft Ir ◽  
Degree Of Charge Transfer

ABSTRACTA series of coordination compounds -macrocycle tetraaza derivatives with extended electronic conjugations- as molecular solids have been synthesized and analyzed by Raman spectroscopy. Their resistivity vs. temperature characteristics, measured in thin films, show three types of behavior: metallic, semiconductor and, in some cases, semiconductor with a transition to metallic below certain temperature. Room temperature Raman spectra were obtained in a FT-IR spectrometer and some stretching modes show different Raman shifts depending on the reactants. We relate these shifts with the degree of charge transfer between donor and acceptor radicals.

Study on the Structural Properties of Polycrystalline Er2O3 Films on SI(001) Substrates by Raman Spectra

2014 ◽  
Vol 953-954 ◽  
pp. 1091-1094
Author(s):  
Jun Chao Wang ◽  
Yan Yan Zhu
Keyword(s):  
Raman Spectroscopy ◽  
Structural Properties ◽  
Raman Spectra ◽  
Si Substrates ◽  
Different Temperatures ◽  
Sensitive Method

The Raman spectra of polystalline Er2O3 films on Si (001) substrates annealed at different temperatures in O2 atmosphere were investigated. Seven Raman lines are identified in annealed Er2O3 films on Si (001) substrates. Two broad peaks larger than 600 cm-1 are detected, and their origination is discussed. Raman spectroscopy is proved to be a simple and sensitive method to characterize the structures of Er2O3 films on Si substrates.

Micro-Raman Characterization of Arsenic-Implanted Silicon: Interpretation of the Spectra

1999 ◽  
Vol 588 ◽  
Author(s):  
James P. Lavine ◽  
David D. Tuschel
Keyword(s):  
Raman Spectroscopy ◽  
Raman Spectra ◽  
Room Temperature ◽  
Micro Raman Spectroscopy ◽  
Raman Characterization

AbstractRaman spectra were measured on arsenic-implanted silicon with micro-Raman spectroscopy in the backscattering mode and with macro-Raman spectroscopy. A peak is observed between 505 and 510 cm−1 with 488 and 514.5 nm excitation. This peak and a related peak from the substrate at about 520 cm−1 are seen in selected regions of the implanted samples when the implant dose is above 2 × 1014 As/cm2. These features may be due to a long room temperature anneal, as they are absent in recently prepared samples. Possible explanations for the features are presented.

CVD synthesis of graphene nanoplates on MgO support

2014 ◽  
Vol 32 (2) ◽  
pp. 243-246
Author(s):  
Ravin Jugade ◽  
Shalini Sharma ◽  
Suresh Gokhale
Keyword(s):  
Thermal Decomposition ◽  
Raman Spectroscopy ◽  
Structural Properties ◽  
Raman Spectra ◽  
Cvd Synthesis ◽  
Mgo Support ◽  
Decomposition Of Methane ◽  
Graphene Nanoplates

AbstractSynthesis of graphene directly on MgO has been carried out and the structural properties of the obtained material have been investigated. Few-layered graphene was produced by simple thermal decomposition of methane over MgO powder at 950 °C in a CVD reactor. The samples were purified by 10 N HNO3 treatment, and studied by TEM, Raman spectroscopy, EDAX and SEM. TEM clearly indicated the formation of graphene. EDAX showed that the purified sample contained only carbon and no traces of MgO. The characteristic Raman features of graphene were also seen as D-band at 1316 cm−1, G-band at 1602 cm−1, and a small 2D-band at 2700 cm−1 in the Raman spectra. The strong D-band suggests that the graphene possess large number of boundary defects. The small 2D-band indicates the formation of few-layered graphene.

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