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L-Leucine Magnesium Nitrate HexaHydrate (LL + MNHH) crystal is a nonlinear optical (NLO) material of semiorganic type. It has grown using a slow evaporation solution growth (SEST) technique at elevated temperature (40∘C) by dissolving LL+MNHH in double distilled water. It was crystalized and recrystalized from a supersaturated solution by stirring it for several hours to get high optical perfection. The X-ray diffraction studies confirmed the presence of the intermixed compound in the LL + MNHH crystal and possess monoclinic structure. Fourier transform infrared spectroscopy (FTIR) spectrum identified the functional groups of the grown crystal. The crystal has very good optical absorption and transparency in the UV–Vis region. The thermal analysis revealed the thermal stability of the crystal. The dielectric study shows that dielectric constant and dielectric loss decrease at higher frequencies. The crystal showed nonlinear property by second-harmonic generation (SHG) study. This type of material with fair nonlinearity is useful in optoelectronics application devices. [ABSTRACT FROM AUTHOR]

Multiferroics Bi0.90Pr0.10Fe1-xTixO3 were synthesized to study the effect of Pr and Ti co-doping on crystal structure, dielectric and magnetic properties. Co-doping leads to the disappearance of impurity phases. Rietveld refinement confirms structural phase transition from pure R3c phase to mixed phases (P1 + R3c). Dielectric constant and loss exhibit dispersion in low-frequency region and become constant in the high-frequency region. Dielectric constant decreases with increasing Ti concentration and shows comparatively stable behavior by virtue of concealed oxygen vacancies. The magnetic investigation reveals that samples are weakly ferromagnetic. [ABSTRACT FROM AUTHOR]

The title compound 1-(2-chlorophenyl)-3,3-bis(methylthio)prop-2-en-1-one (1) have been synthesized, crystallized and characterized using FT-IR, 1H NMR, 13C NMR, LCMS and confirmed by single crystal X-ray diffraction method. In addition, the intermolecular interactions in the crystal structure are analyzed using Hirshfeld surfaces computational method. The (1) crystallizes in a monoclinic crystal system (space group P 21/c) with cell parameters a = 17.0132(9) Å, b = 8.6521(4) Å, c = 8.2815(7) Å, β = 95.512(6) ° and Z = 4. Intermolecular hydrogen bonds/interactions of the type C · · · H · · · O, C–H · · · S, C–H · · · Cg and C–Cl · · · Cg stabilize the crystal structure. The intermolecular interactions responsible for crystal packing are analyzed using Hirshfeld surfaces computational method, 2D finger print plots, electrostatic potential surfaces, toplogy surfaces [curvedness (C) and shape index (S), enrichment ratio (E) and 3D energy frameworks]. In addition the dielectric studies were performed for the title molecule. The crystal structure database (CSD) analysis was carried out for structural conformation and crystal packing confirmation. Overall structural studies confirmed that the intermolecular interactions of the type S · · · S chalocogen bonds are involved in crystal packing in addition to the C11–H11 · · · O1, C10–H10B · · · O1, two C10–H10 · · · S1, C4–H11 · · · Cg1 and C1–Cl1 · · · Cg1 interactions. [ABSTRACT FROM AUTHOR]

Abstract Growth of pure and oxalic acid (OA) added zinc thiourea chloride (ZTC) crystals was achieved by slow evaporation method. The structural parameters of these have been confirmed by single crystal XRD. Incorporation/presence of OA in ZTC crystal was established by EDS. Optical transparency of grown crystals has been evaluated in 200–900 nm region and linear optical constants are examined in visible region using the UV–visible transmittance data. SHG efficiency of OA:ZTC crystal is observed to be 4.51 times that of ZTC crystal tested by Kurtz-Perry method. Z-scan measurement was done at 632.8 nm to confirm the nature of third order nonlinearity of OA:ZTC crystal and third order nonlinear susceptibility (χ(3)), refraction (n 2) and absorption coefficient (β) were evaluated. Mechanical behavior of OA:ZTC crystal is investigated using Vicker's microhardness studies. Dielectric properties of crystals were comparatively investigated at different temperature. The thermal stability and melting point of OA doped ZTC crystal material has been determined employing thermogravimetric and differential scanning calorimetric analysis. Graphical abstract Image 1 Highlights • OA increased the optical transparency by 22% and band gap of ZTC crystal. • SHG efficiency of OA-ZTC crystal is 4.51 times that of ZTC crystal. • OA altered the refraction nonlinearity of ZTC and triggered the strong kerr effect. • The n 2 and χ3 of OA-ZTC crystal is 1.72 × 10−9 cm2/W and 1.31 × 10−4 esu, respectively. • OA improved the dielectrics of ZTC crystal, crucial for electro-optic devices. [ABSTRACT FROM AUTHOR]

New organic single crystals of 2-amino-6-methylpyridinium 2-hydroxybenzoate (2A6M2H) were grown by slow evaporation solution growth technique at room temperature. The grown crystal structure was studied using single crystal XRD. Crystalline nature and phases were confirmed by powder XRD analysis. FT-IR study was used to identify the functional groups present in the compound. UV-Vis study revealed that the lower cut off wavelength of the crystal is at 350 nm. The dielectric studies indicated the low value of dielectric loss at high frequency. Mechanical properties of the crystals were studied using Vickers microhardness test. The Z-Scan studies were conducted for the crystal using He–Ne laser. [ABSTRACT FROM AUTHOR]

The 34 × 10 × 06 mm3 bulk single crystal of bis-thiourea zinc chloride (BTZC) doped potassium dihydrogen phosphate (KDP) material has been grown from solution evaporation growth technique. The color centered photoluminescence nature of grown crystal has been investigated in visible region of interest. The He-Ne laser assisted Z-scan analysis has been carried out to explore the promising third order nonlinear optical behavior of BTZC-KDP crystal. The origin of nonlinear refraction (n 2), the absorption coefficient (β) and susceptibility (χ3) has been discussed and their respective magnitudes have been determined using the Z-scan transmittance data. The high magnitude of laser damage threshold (GW/cm2) of grown crystal has been determined using the 1064 nm Nd:YAG laser. The influence of increasing temperature on dielectric constant and dielectric loss of pure and BTZC doped KDP crystal has been comparatively investigated. The thermal decomposition and the melting profile of BTZC doped KDP crystal has been investigated by means of simultaneous thermogravimetric and differential thermal analysis. [ABSTRACT FROM AUTHOR]

A novel nanostructure of CdSe in presence of CTAB, synthesized via solvothermal process, has been reported. The structural, morphological, optical and dielectric properties of the synthesized CdSe nanostructure have been studied. The synthesized CdSe nanostructure has pure wurtzite structure with average particle diameter of 16 nm and length 160 nm as confirmed by SEM. The band gap of the observed nanostructure is found to be 2.2 eV. The photoluminescence, FTIR and dielectric properties of the prepared nanostructutre have been discussed. [ABSTRACT FROM AUTHOR]

An organic competent l -Serine (LS) single crystal which corresponds to the division of acentric category has been grown-up and harvested efficiently by the method of slow solvent evaporation. The orthorhombic structure, P 2 1 2 1 2 1 space group and crystallinity of LS have been ascertained employing the analysis of single crystal and powder X-ray diffraction. The existence of functional groups in LS molecule was discovered by FT-Raman and FTIR studies. The transmittance spectrum in UV–Visible profile has been utilized to proclaim its substantial optical constant and to establish its crystalline perfection by means of Urbach energy. The investigations of dielectric and ac conductivity have been employed to estimate the activation energy. To evaluate its mechanical stability, Vickers microhardness examination has been executed and significant mechanical parameters have also been assessed. The fluorescence analysis emphasis the electronic excitation and also its life time was also computed. The findings of laser damage threshold signify exquisite resistance to powerful laser radiation. Using the process of Kurtz-Perry, the efficiency of SHG for LS has been examined and it was found to be 0.84 times of standard KDP. The third order nonlinearity were checked by the approach of Z-scan and affirmed that LS exhibit two photon absorption and self-defocusing effect. The results procured in the current work declared that LS is an enticing applicant for the practicable applications in nonlinear optics. [ABSTRACT FROM AUTHOR]

Single crystal of new cadmium and ytterbium molybdato-tungstate (Cd 0.9706 ⎕ 0.0098 Yb 0.0196 (MoO 4 ) 0.9706 (WO 4 ) 0.0294 , where ⎕ denotes cationic vacancies) has been successfully grown by the Czochralski method in air and under 1 MPa. X-ray crystallographic analysis reveals that the as-grown single crystal belongs to a scheelite-type structure (a = b = 5.15539(12) and c = 11.1919(3) Å, space group I 4 1 / a ), in which Yb 3+ ions do not show long-range order and are randomly distributed in the unit cell, substituting the Cd 2+ ones. The as-grown single crystal does not show anisotropy of optical properties, i.e. its direct band gap reaches E g = 1.76 or 1.75 eV along ( 100 ) and ( 001 ) crystallographic directions, respectively. The single crystal exhibits paramagnetic state with short-range antiferromagnetic and long-range ferrimagnetic interactions, a magnetization with zero coercivity and, a remanence that is almost a universal function of H/T, characterizing superparamagnetic-like behaviour. Electrical studies of the new ytterbium-doped cadmium molybdato-tungstate single crystal show a relatively small dielectric constant (ε r <12), large lossiness of Joule-Lenz type observed at low frequencies as well as nonlinear I-V characteristics of Schottky or Maxwell-Wagner type. [ABSTRACT FROM AUTHOR]

A nonlinear optical material benzoyl valine (BV) was synthesized by the technique of slow evaporation process at room temperature. The single crystal X ray diffraction analysis evince that crystal corresponds to acentric space group P21 with monoclinic system. The diverse optical properties assured an elevated transparency in BV crystal. Photoluminescence profile revealed the suitability of crystal for fabricating violet lasers. The Laser damage threshold and the dielectric behavior of the grown crystal were analyzed to indicate its practical applications. The second and third order nonlinear optical measurements were studied to prove its potentiality in the domain of nonlinear optical applications. [ABSTRACT FROM AUTHOR]

The new inorganic-organic hybrid material aquadiiodo (3-aminopropanoic acid) cadmium (II) [ADI (3-AP) Cd] has been successfully synthesized and good quality crystals have been grown by slow evaporation solution technique. The structure was determined by single crystal X-ray diffraction at room temperature. The compound crystallizes in monoclinic crystal system with centro symmetric space group P 2 1 / c and four molecules in the unit cell. The structure of the title compound was further confirmed by 1 H and 13 C nuclear magnetic resonance spectral analysis. FT-IR spectroscopy was used to confirm the presence of various functional groups in the compound. The transmittance and optical parameters of the crystal were studied by UV- Visible-NIR spectroscopy. The thermal stability of the grown crystal was evaluated using thermogravimetric and differential thermal analyses. Mechanical hardness has been identified by Vickers micro hardness study and work hardening coefficient was calculated. Dielectric measurement was carried out as a function of frequency and results are discussed. The growth mechanism of the crystal was assessed by chemical etching studies. The third-order nonlinear optical susceptibility of [ADI (3-AP) Cd] was derived using the Z-scan technique, and it was 3.24955 × 10 −8 esu. The positive nonlinear refractive index 2.48505 × 10 −11 m 2 /W, is an indication of self-defocusing optical nonlinearity of the sample. It is believed that the [ADI (3-AP) Cd] is a promising new candidate for developing efficient nonlinear optical and optical power limiting devices. [ABSTRACT FROM AUTHOR]

Molecular organic single crystals of bis( l-asparaginium hydrogensquarate) monohydrate [BASQ; (C8H10N2O7)2·H2O] have been grown by solution technique. Crystallographic information was investigated by single-crystal X-ray diffraction (SCXRD) analysis. Hirshfeld surface and fingerprint plot studies were performed to understand the intermolecular interactions of the BASQ crystal in graphical representation. Functional group identification was studied with FT-IR (Fourier transform-IR) spectroscopy. The positions of proton and carbon atoms in the BASQ compound were analyzed using NMR spectroscopy. High transparency and a wide band gap of 3.49 eV were observed in the linear optical study by UV-vis-NIR spectroscopy. Intense and broad photoluminescence emissions at room temperature were observed in blue and blue-green regions. The frontier molecular orbitals of the BASQ molecule were obtained by the DFT/B3LYP method employing 6-311G** as the basis set. The dielectric study was carried out with temperature at various frequency ranges. The piezoelectric charge coefficient ( d33) value of BASQ crystal was found to be 2 pC/N, which leads to its application in energy harvesting, mechanical sensors and actuators applications. In the non-linear optical study, the BASQ crystal showed promising SHG conversion efficiency. Mechanical properties of the BASQ crystal were studied experimentally by Vicker's microhardness technique, which revealed that the grown crystal belonged to the softer category. BASQ crystal void estimation reveals the mechanical strength and porosity of the material. [ABSTRACT FROM AUTHOR]

The cocrystal was screened by solvent drop grinding method and the crystals were grown by slow evaporation method at ambient conditions. The cocrystal formation of o -picolinic acid with p -nitro aniline was initially analysed by powder X-ray diffraction. Further the structural properties of the grown crystal were confirmed by the single X-ray diffraction which indicates that the cocrystal were connected by the strong N + H − ⋯O hydrogen bond interaction. The cell parameters of the grown crystal were a = 14.2144(5) Å, b = 5.7558(2) Å, c = 16.0539(6) Å. The functional groups were identified using Fourier transform infrared and Raman spectral analysis. The excitation and emission state of the sample was analysed by the UV–Visible and Fluorescence studies. The red emission was observed from the Fluorescence studies. NMR studies revealed the chemical shift of the cocrystal. Thermal stability and its melting behaviour were studied by TGA and DSC analytical techniques. Electrical behaviour was studied using the dielectric studies. The intermolecular charge transfer within the molecule were analysed using HOMO- LUMO plots. [ABSTRACT FROM AUTHOR]

Good quality crystals of bis thiourea lead chloride (BTLC) have been grown by slow evaporation method from aqueous solution. Orthorhombic structure and Pna2 1 space group of the crystals have been identified by single crystal X-ray diffraction. Studies on nucleation kinetics of grown BTLC has been carried out from which meta-stable zone width, induction period, free energy change, critical radius, critical number and growth rate have been calculated. The experimental values of interfacial surface energy for the crystal growth process have been compared with theoretical models. Ultra violet transmittance studies resulted in a high transmittance and wide band gap energy suggested the required optical transparency of the crystal. The second harmonic generation (SHG) and phase matching nature of the crystal have been justified by Kurtz-Perry method. The SHG nature of the crystal has been further attested by the higher values of theoretical hyper polarizability. The dielectric nature of the crystals at different temperatures with varying frequencies has been thoroughly studied. The activation energy values of the electrical process have been calculated from ac conductivity study. Solid state parameters including valence electron plasma energy, Penn gap, Fermi energy and polarisability have been unveiled by theoretical approach and correlated with the crystal's SHG efficiency. The values of hardness number, elastic stiffness constant, Meyer's Index, minimum level of indentation load, load dependent constant, fracture toughness, brittleness index and corrected hardness obtained from Vicker's hardness test clearly showed that the BTLC crystal has good mechanical stability required for NLO device fabrication. [ABSTRACT FROM AUTHOR]

4-(aminocarbonyl)pyridine 4-(aminocarbonyl)pyridinium hydrogen L-malate [(4ACP)(4ACP).(LM)] a new organic nonlinear optical (NLO) crystal was grown by the slow evaporation method. Single crystal X-ray diffraction analysis revealed that the [(4ACP)(4ACP).(LM)] crystal belongs to monoclinic crystal system, space group P2 1 /n, with a three dimensional network. Thermogravimetry (TG) and differential thermal (DT) analyses showed that [(4ACP)(4ACP).(LM)] is thermally stable up to 165 °C. The optical transmittance window and the lower cut-off wavelength of [(4ACP)(4ACP).(LM)] were found out by UV–vis–NIR spectral study. The molecular structure of [(4ACP)(4ACP).(LM)] was further confirmed by FTIR spectral studies. The relative dielectric permittivity and dielectric loss were determined as function of frequency and temperature. The third order nonlinear optical property of [(4ACP)(4ACP).(LM)] was studied by the Z -scan technique using a 532 nm diode pumped CW Nd:YAG laser. Nonlinear refractive index, nonlinear absorption coefficient and third order nonlinear susceptibility of the grown crystal were found to be 7.38×10 −8 cm 2 /W, 0.08×10 −4 cm/W and 5.36×10 −6 esu, respectively. The laser damage threshold value is found to be 1.75 GW/cm 2 [ABSTRACT FROM AUTHOR]

Polycrystalline samples of Ga 1− x Sc x FeO 3 ( x =0, 0.1, 0.2, and 0.3) were prepared by solid state reaction method. The monophasic compounds were found to crystallize in the orthorhombic space group Pna2 1 , confirmed from Rietveld refinement of the XRD patterns. The lattice constants were found to increase with increasing Sc content. Mössbauer measurements carried out at room temperature (RT) showed four paramagnetic doublets. Isomer shift values show that iron is in Fe 3+ high spin state for all four Fe sites in all the compositions. Quadrupole splitting increases with Sc content which means that there is an increase in local structural distortion with Sc substitution. That Sc resides in the Ga2/Fe site was confirmed by Mössbauer spectroscopy. Low temperature Mössbauer study also shows a similar trend. Hyperfine magnetic field decreases with increasing Sc content. Sc substitution causes a reduction of magnetic ordering. The dielectric constant was found to decrease with increasing Sc content. The activation energies, obtained by the temperature dependence of dielectric relaxation as well as the conductivity, showed almost equal values around 0.3 eV. [ABSTRACT FROM AUTHOR]

A novel semiorganic optical material (Bis) isonicotinamide perchlorate monohydrate (BINPM) has been synthesized, and crystals were grown by the slow evaporation solution growth technique. The crystal structure of BINPM was elucidated by single crystal X-ray diffraction technique. It revealed that the grown crystal belongs to monoclinic system with a space group P2/c and that the unit cell parameters are a = 7.6480(5) Å, b = 23.4754(16) Å, c = 9.0915(6) Å, α = γ = 90° and β = 106.548(2)°. UV-Vis-NIR spectral study revealed that the BINPM crystal has a wide transmission window in the entire visible region with a lower cut-off wavelength 311 nm. The molecular structure of the title compound was confirmed by FTIR and FTNMR spectral studies. Thermogravimetric and differential thermal analyses revealed the thermal stability of BINPM compound. The luminescence study showed a violet emission of BINPM compound. Microhardness and etching studies were also carried out on the samples, respectively. The dielectric constant and dielectric loss of the crystal were measured as a function of frequency and temperature, and the results are discussed. [ABSTRACT FROM AUTHOR]

Optically transparent formic acid (FA) doped potassium dihydrogen phosphate (KDP) crystal of dimension 21×15×9 mm3 has been grown by slow evaporation solution technique (SEST). The X-ray diffraction (XRD) technique was used to confirm the cell parameters and the shifts in peak positions of identified reflecting planes. The incorporation of FA in KDP has been qualitatively analyzed by fourier transform infrared analysis. The UV-visible absorption spectrum of crystals has been recorded in the range of 200 to 900 nm and the doped KDP crystal is found to have improved optical parameters than pure KDP. The color centered photoluminescence emission spectrum of grown crystal has been illustrated in visible region. The mechanical behavior of pure and doped KDP crystal has been investigated using the Vicker's microhardness analyzer and hardness parameters have been calculated. The effect of FA on thermal stability of KDP crystal was examined by means of thermogravimetric and differential thermal analysis. The temperature dependent dielectric behavior of crystals was studied. [ABSTRACT FROM AUTHOR]

Abstract: A new NLO organic crystal of salicylideneaniline (SAN) was synthesized and SAN bulk crystal was grown along <412> plane using uniaxial crystal growth method of Sankaranarayanan–Ramasamy with a new modification in the growth assembly. The crystal was grown with a growth rate of 2mm/day upto a dimension of 4cm in length and 6cm in diameter having a cylindrical morphology within 30 days. The powder XRD analysis confirmed the crystalline perfection. The presence of C N bond with intramolecular hydrogen bonding on the protonation of ions were confirmed by FTIR analysis. The range of optical absorbance was ascertained by recording UV–vis–NIR spectrum. The 1H1 and C13 NMR spectrum confirms the molecular structure. Dielectric studies were carried out to estimate the dielectric parameters of the grown crystal in the frequency range from 100Hz to 100KHz. The existence of second harmonic generation (SHG) signal was observed using Nd:YAG laser with the fundamental wavelength of 1064nm. Phase matching parameters of the grown crystal confirms that salicylideneaniline is a promising candidate for LASER applications. [Copyright &y& Elsevier]

Abstract: Pure (undoped) and RbCl-doped LAHC single crystals were grown successfully by the solution method with the slow evaporation technique at room temperature. The grown crystals were colourless and transparent. The solubility of the grown samples were found out at various temperatures. The lattice parameters of the grown crystals were determined by the single crystal X-ray diffraction technique and the diffracting planes were indentified by recording the powder X-ray diffraction pattern. UV–visible transmittance studies were carried out for the grown samples. Chemical analysis and atomic absorption studies indicate the presence of rubidium in the doped LAHC crystals. Nonlinear optical studies reveal that the SHG efficiency increases when the LAHC crystal is doped with rubidium chloride (RbCl). From microhardness studies, it is observed that the RbCl-doped LAHC crystal is harder than the pure sample. It is observed that the dielectric properties of the LAHC crystal are altered when it is doped with rubidium chloride. [ABSTRACT FROM AUTHOR]

Abstract: Synthesis, growth, X-ray crystal structure and characterization of a novel third order nonlinear optical material, 4-methoxy-4′-dimethylamino-benzylidene aniline (MDMABA), are reported for the first time. The asymmetric unit of MDMABA compound contains two crystallographically independent molecules (A and B), and they exist in the E-configuration. The structural perfection of the grown crystal is analyzed by high-resolution X-ray diffraction rocking curve analysis. The functional groups present in MDMABA are investigated by FTIR and FT-Raman spectral analyses. The placement of the protons is determined using HNMR spectrum. The range and percentage of optical transmission were ascertained by recording UV–vis–NIR spectrum. Thermal and mechanical properties are reported. Dielectric study shows that the dielectric constant of the crystal varies with frequency and temperature. The third order nonlinear optical absorption coefficient of the MDMABA crystal is determined by the Z-scan technique. [ABSTRACT FROM AUTHOR]

Abstract: Single crystals of undoped and urea-doped γ-glycine (gamma-glycine) were grown from aqueous solutions by slow evaporation technique. Morphological changes were noticed in γ-glycine crystals when urea was added as dopant. Single crystal X-ray diffraction (XRD) studies were carried out to find crystal structure and lattice parameters of the grown crystals. UV-Visible transmittance spectra were recorded for the samples to analyze the transparency in visible and near infrared (NIR) region and UV cut-off wavelength observed for the samples to be at 257nm. Nonlinear optical (NLO) activity of the grown crystals was studied using a Q-switched and pulsed Nd:YAG laser and second harmonic generation (SHG) efficiency was found. Values of work hardening coefficient were determined from microhardness studies and confirmed that the grown crystals belong to the category of soft materials. Measurements on values of dielectric constant, dielectric loss, AC conductivity and activation energy of the samples were carried out to understand the electrical phenomena that are taking place in pure and urea-doped γ-glycine crystals. [Copyright &y& Elsevier]

Abstract: Pure and magnesium sulfate-doped triglycine sulpho-phosphate (TGSP) single crystals were grown by solution method with the slow evaporation technique. Solubility of the samples in de-ionized water was found in various temperatures ranging from 30 to 60°C. Single-crystal X-ray diffraction (XRD) studies on the grown crystals reveal the monoclinic crystal structure. Atomic absorption study (AAS) was carried out to confirm the presence of Mg2+ in the grown doped TGSP crystals. Dielectric constant and dielectric loss of undoped and magnesium sulfate-doped TGSP crystals were measured for various frequencies and temperatures. It is observed from the studies that solubility and dielectric properties like dielectric constant and dielectric loss increase when TGSP crystal is added with magnesium sulfate. Thermogravimetric and differential thermal analyses (TG/DTA) on the grown crystals have been carried out. The effect of impurity (magnesium sulfate) on structural, electrical and thermal properties of TGSP crystals has been investigated. [Copyright &y& Elsevier]

In the present work, TiO 2 nanoparticles have been synthesized using the sol-gel method and further being annealed at different temperatures to study the influence of temperature on structural, morphological and dielectric properties of TiO 2. Owing to its peculiar physical properties, it has found various applications and been an interactive material for research in the field of semiconductor physics. To study crystallographic nature of prepared TiO 2 nano-particles x-ray diffraction study was done. The result shows that on increasing the annealing temperature, the structure of TiO 2 nanoparticles changes from anatase phase to the mixed anatase-rutile phase. The spectroscopic study done using FTIR reveals tetragonal arrangement of Ti and O ions in the TiO 2 nanoparticles. The morphological study of samples was done by SEM technique. The SEM images show that the particle size of TiO 2 nanocrystals increased as a result of increasing annealing temperature. In addition, EDS study confirmed that no impurities were present in the samples. Dielectrics properties were measured at different frequencies ranging from 20 Hz to 5 MHz at room temperature. It is found that the TiO 2 nanoparticles possess a higher value of dielectric constant and lower dielectric loss at 1 kHz. The novelty in this work is that the modified preparative conditions of TiO 2 nanoparticles yield better and optimized properties related to the crystal structure, morphology, and dielectric behavior for application in optoelectronic devices, super-capacitors, spintronics, and other dielectric applications. • TiO2 nanoparticles are synthesized using sol-gel technique. • Physical and dielectric properties of prepared materials are studied using RD,SEM, EDS, FTIR spectroscopic, and LCR methods. • Higher value of dielectric constant and lower dielectric loss value are achieved for pristine TiO2 for colossal permittivity. [ABSTRACT FROM AUTHOR]