Sacheen Kumar

Synthesis and characterization of lanthanum doped zinc oxide nanoparticles

La doped ZnO (Zn1-xLaxO, x = 0, 3, 6 and 9) were prepared via chemical co-precipitation method using Zinc Acetate, Lanthanum Acetate and Sodium Hydroxide at 50°C. Hydrate nanoparticles were annealed in air at 300°C for 3 hours. The synthesized samples have been characterized by powder X-ray diffraction and UV–Visiblespectrophotometer. The XRD measurement revealsthat the prepared nanoparticles have different microstructure without changing a hexagonal wurtzite structure. The result shows the change in nanoparticles size with the increment of lanthanum concentration for lower concentration for x = 0 to 6 and decreases at x = 9.

Synthesis and Characterization of Cadmium Doped ZnO Nanoparticles

Cd doped ZnO (Zn1–xCdxO, x = 0, 0.03, 0.06 and 0.09) were prepared via a chemical co-precipitation method using Zinc Acetate, Cadmium Acetate and Sodium Hydroxide at 50 °C. Hydrate nanoparticles were annealed in air at 300 °C for 3 h. Effect of doping is investigated with the help of X-ray Diffraction Technique, UV Visible spectroscopy, FTIR and RAMAN spectroscopy The result of X-ray Diffraction shows the change in nanoparticles size. The XRD measurement reveals that the prepared nanoparticles have different microstructure without changing a hexagonal wurtzite structure . We analyzed with the study of tauc plots that band gap decreases with the increment of doping concentration.

Optical and structural properties of Fe-doped SnO2 nanoparticles prepared by co-precipitation method

Today nanomaterials plays important role in every field, due to their unique mechanical, chemical and electrical properties which are completely different from the bulk materials. With reduction in the size of material its properties are dynamically changed. Semiconductor materials are widely used in electronic devices but in the field of optoelectronic these materials have some limitations. Tin oxide could be the material which could be used in these applications without limitations. Doped Tin Oxide is an oxygen deficient material which could be beneficial for transparent conducting oxide. Iron doped SnO2 prepared by co-precipitation method. Studies on structural properties of undoped and doped SnO2 were done by X-ray diffraction. The XRD results have shown that the size of the nanoparticles decreases with Fe doping down to 53nm. Optical Properties were studied by UV-visible spectroscopy. Band gap was found to decrease with increase in iron content in samples.

Preparation and atomic force microscopy of CTAB stabilized polythiophene nanoparticles thin film

Polythiophene nanoparticles were synthesized by iron catalyzed oxidative polymerization method. Polythiophene formation was detected by UV-Visible spectroscopy with λmax 375nm. Thin films of CTAB stabilized polythiophene nanoparticles was deposited on n-type silicon wafer by spin coating technique at 3000rpm in three cycles. Thickness of the thin films was computed as 300-350nm by ellipsometry. Atomic force micrscopyrevealws the particle size of polymeric nanoparticles in the range of 30nm to 100nm. Roughness of thinfilm was also analyzed from the atomic force microscopy data by Picoimage software. The observed RMS value lies in the range of 6 nm to 12 nm.

Study of structural and optical properties of Fe doped CuO nanoparticles

Iron doped Copper oxide nanoparticles were synthesized by the co-precipitation method at different concentration (3%, 6%, 9%) at 300-400° C with Copper Acetate and Ferric Chloride as precursors in presence of Polyethylene Glycol and Sodium Hydroxide as stabilizing agent. Effect of doping on the structural and optical properties is studied. The obtained nanoparticles were characterized by X-Ray Diffraction and UV-Visible Spectroscopy for examining the size and the band gap respectively. The X-Ray Diffraction plots confirmed the monoclinic structure of Copper oxide suggesting the Cu atoms replaced by Fe atoms and no secondary phase was detected. The indirect band gap of Fe doped CuO nanoparticles is 2.4eV and increases to 3.4eV as the concentration of dopant increases. The majority of particle size is in range 8 nm to 35.55 nm investigated by X-ray diffractometer.

Synthesis and Characterization of Copper Doped Cobalt Oxide (Co3O4) by Co-precipitation Method

Today nanomaterials play a key role in various fields such as electronics, aerospace, pharmaceutical sand biomedical because of their unique, physical, chemical and biological properties which are different from bulk materials. In this research work, we have reported a co-precipitation method used to synthesize the copper doped cobalt oxide nanoparticles. The characterization of nanoparticles were investigated by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) to determine the structural properties and particle size respectively. By XRD analysis, we confirm that Co3O4 nanoparticles are formed and mean grain size is decreased with increasing Cu doping (from 18 to 12 nm).

Preparation and Characterization of Thin Film Prepared by Sodium Dodecyl Sulphate Stabilized Polythiophene

The polythiophene (PT) polymer with short conjugated chain length has been derived with stabilization of Sodium Dodecyl Sulphate (SDS) surfactant under polymerization process with ferric chloride as oxidative agent. The average size of formed nanoparticles demonstrated with the help of AFM and found in range of 30–80 nm with r.m.s value of 2.42 nm. The various bending peaks have shown the formation of PT. The SDS-PT film has been deposited on to the silicon wafer and the thickness was determined to be 400 nm with Ellipsometer technique. The average energy bandgap was found 5.22 eV with absorption spectra of 360 nm observed under the UV-Visible spectroscopy supporting the formation of the Polythiophene nanoparticles.

Effect of Dopant Concentration on Structural and Optical Properties of Cu Doped SnO2

Now a day, nanomaterial plays important role in every field due to their unique properties which are completely different from the bulk materials. Material Properties are dynamically changed with reduction in the crystallite size. Transparent conducting oxides (TCOs) are optically transparent to visible light, but electronically conductive. Owing to these properties, they have broad industrial applications such as optoelectronic devices and photovoltaics. Doped Tin Oxide is an oxygen deficient material which could be beneficial for transparent conducting oxide. The SnO2 was doped with Cu as a dopant element at different concentration. Mede-A software for material design was used to obtain the theoretical data which is to be compared with the practical results. Co-precipitation method was used to prepare Cu-doped SnO2 . Studies on structural properties of undoped and doped SnO2 were done by X-ray diffraction. The XRD results have shown that the size of the nanoparticles decreases down to 51 nm with increase in dopant concentration. Optical Properties were studied by UV-visible spectroscopy. Band gap was found to decreases down to 2.25 eV with increase of dopant content in samples.

Optical and Structural Properties of Silica Nanoparticles Using Material Design Software: MedeA

MedeA is a computational software which is used for the simulation to design and analyse different kinds of materials. Due to attractive optical, electrical and thermal properties such as antiglare and antireflective coatings, thermal insulation, silica nanoparticles have a wide range of applications in the field of semiconductor industry and medical science. In the present work we simulate the XRD , Band structure , Optical spectra and Density of state for silica nanoparticles by using MedeA software.

Synthesis of Lithium Doped Cerium Oxide Nanoparticle by the Co-precipitation Method

In our work we synthesized pure and doped cerium oxide nanoparticle with diameter range from 4 to 6 nm by the co-precipitation method . Cerium oxide widely used for the fuel cell application due to its high ion transport and large oxygen vacancies. These properties were enhanced by the doping of lithium (alkine metal). Properties of synthesized material characterized by XRD, FTIR and by the UV-absorption technique.