MBE growth of AlGaAs/Ge/AlGaAs core-shell nanowire

Heterostructured AlGaAs/Ge/AlGaAs core-multishell nanowires having hexagonal crystal structure were synthesized by molecular beam epitaxy. Formation of 2-3 nm Ge quantum well structure was demonstrated. Raman characterization revealed a 200 cm−1 peak corresponded to hexagonal phases of germanium.

STRUCTURAL AND ELECTROCHEMICAL PROPERTIES OF CHEMICALLY DEPOSITED COPPER DOPED NICKEL HYDROXIDE

Present work reported, copper doped Ni(OH) deposited successfully by chemical bath deposition method on 2 economical stainless steel electrode. The XRD analysis represent hexagonal crystal structure and presence of Ni and Cu confirm by FT-IR study. The surface morphology studied by SEM indicates nanopetals linked marigold like microflowers. -1 -1 The 0.2% Cu doped Ni(OH)2 shows specific capacitance 715 Fg at scan rate 10 mV s . EIS study interprets that electrode N-0.2% have least charge transfer resistance which improve value of specific capacitance. All results revels cupper is good dopant for improve the specific capacitance.

New Ternary Compounds of the Composition Cu2SnTi3 and Their Crystal Structures

A new ternary compound Cu2SnTi3 has been synthesized by vacuum sintering at 900 °C. The atomic structures of CaCu5- and InNi2-like Cu2SnTi3 are calculated using density functional theory methods. The X-ray diffraction (XRD) analysis and selected area diffraction (SAD) patterns of the new ternary compound Cu2SnTi3 are considered to verify the atomic structures of CaCu5- and InNi2-like Cu2SnTi3. The results reveal that the InNi2-like Cu2SnTi3 model has the lowest total energy of −35.239 eV, representing the trigonal crystal structure. The orthorhombic crystal structure of the CaCu5-like Cu2SnTi3 model has the second lowest total energy of −33.926 eV. Our theoretical X-ray diffraction peak profiles of InNi2-like (CaCu5-like) Cu2SnTi3 are nearly identical to experimental one, leading to an error below 2.0% (3.0%). In addition, the hexagonal crystal structure of the CaCu5-like Cu2SnTi3 model has the highest total energy of −33.094 eV. The stability of the Cu2SnTi3 in terms of energy follows the order: the trigonal, orthorhombic, and hexagonal crystal structure.

PHYSICO-CHEMICAL ANALYSIS OF SHADGUNA KAJJALI AND SHADGUNA BALIJARITA RASASINDURA)

Analytical study of any drug is essential to standardize it. Analytical study is carried out to check drug quality. For this purpose some analytical tests are performed and their results are compared with standard parameters. The drug fulfilling these criteria can be taken as standard drug and can be used for therapeutic purpose. Percentage of total mercury in Shadguna Kajjali and Shadguna balijarita rasasindur was 40.03%, and 84.17%. Total Sulphur in Shadguna Kajjali and Shadguna balijarita rasasindur was 43.07% and 11.16%. Percentage of free sulfur in Shadguna Kajjali and Shadguna balijarita rasasindur was 22.11%. XRD of Shadguna balijarita Rasasindur were identified as Cinnabar (Hgs) with Hexagonal Crystal Structure having primitive lattice. In this paper Physico-Chemical Analysis of Shadguna Kajjali and Shadguna balijarita rasasindura is done.

PHARMACEUTICAL & ANALYTICAL STUDY OF SAMAGUNA BALIJARITA RASA SINDURA

Rasasindura is a one of Kuppipakva Rasayana a unique method of preparation and is one such imperative Kupipakwa Rasayana, referred to be Elixir of life. It is formulated by two fundamental substances of Rasashastra i.e., Shudha Parada and Shudha Gandhaka. It is said to be prepared by same process but with different proportion of Gandhaka, and accordingly various forms of Rasasindura are named as Ardhaguna, Samaguna, Dviguna, Triguna, Chaturguna, Panchaguna, Shadguna balijarita Rasasindura, where in, the therapeutic merits of Rasasindura and pharmaceutics of Rasasindura changes according to quantum of Gandhaka. Rasasindura is a Sagandha, Sagni and Bahirdhooma Kupipakwa Rasayana. Samaguna balijarita Rasasindur was prepared with equal quantities of Parada and Gandhaka by Kupipaka method in 20 hours and physicochemical analysis was carried out. Ash values in Samagunabalijarita Rasasindur were found to be 0.02%. Free mercury was nil in Samagunabalijarita Rasasindur where as its traces were present in the Kajjali. Free sulfur traces were present in Samagunabalijarita Rasasindur. Total mercury percentage in Samaguna Kajjali was 36.02%. Total mercury percentage in Samagunabalijarita Rasasindoor was 83.15%. Total sulfur percentage in Samagunabalijarita Rasasindoor was 13.06%. By XRD analysis Samagunabalijarita rasasindur was identified as Cinnabar having Hexagonal crystal structure with primitive lattice.

Thermoluminescence of Undoped and Cu Doped CdS Nanoparticles

In this paper an attempt has been made to synthesize undoped and 1wt% Cu doped CdS nanoparticles through chemical co-precipitation method. Prepared particles were characterized to explore their structural and thermoluminescence properties. The X-ray diffraction analysis reveals a hexagonal crystal structure at room temperature. The particle sizes are determined by Scherer formula for both undoped and doped CdS nanoparticles of various concentrations. The average grain size of undoped and Cu doped nanoparticles is found to be 32.81nm and 22.3nm respectively. The thermoluminescence studies of these above samples show TL peaks occurring at temperatures 379,428,471,510 and 550 Kelvin corresponding to activation energy 0.7 eV, 0.9eV, 1.2 eV, 1.4 eV and 1.3eV respectively.

Tuning the bandgap in Co-doped Mg(OH)2 nanoparticles

Cobalt (Co) doped magnesium hydroxide Mg(OH)2 nanoparticles are synthesized by a surfactant-free co-participation method. Scanning electron microscopy (SEM) images show nanometer size Mg(OH)2 particles in spherically shaped particle-like morphology. Synthesis of these Mg(OH)2 nanocrystals involves the formation of monomeric MgOH[Formula: see text] ions as the precursor for the Mg(OH)2 nuclei which finally evolves in spherical particle-like morphology. X-ray diffraction (XRD) confirms the hexagonal crystal structure of the samples. With increasing Co concentration, the absorption spectra of the samples show narrowing of the bandgap from 5.47 eV (for pure Mg(OH2)) to 5.26 eV (for 10% Co-doped Mg(OH2)) effect is attributed to changes in the interaction potentials between Co and the host Mg(OH)2 lattice due to dopant-induced lattice distortion and the presence of a mixed valance Co[Formula: see text]/Co[Formula: see text] state.

Investigating The Effects of Activation Temperature on The Crystal Structure of Activated Charcoal From Palm Bunches (Arengga Pinnata Merr.)

This research aims to determine the effect of activation temperature the crystal structure of activated charcoal. The material used activated charcoal bunches (Arengga Pinnate Merr). The process of making activated charcoal divided into two, namely the carbonization stage at a temperature of 250- 400 oC and the activation stage at a temperature variation of 600 - 800 ̊C. To find the crystal structure, the sample characterized by X-Ray Diffraction. The results of analysis the dominant elements diamond before activation with a percentage of 90.2% and an orthorhombic crystalline structure, where the lattice parameter a = 4.12700 Å; b = 4.93700 Å; c = 4.81900 Å. Peak Carbon has a hexagonal crystal structure in all temperature variations. Peak Graphite an orthorhombic crystal structure and at a temperature of 700 oC a hexagonal crystal structure formed. Therefore, giving temperature variations the activated charcoal of the bunches affects the structure of the formed Crystal. Wherein increasing the activation temperature, the crystal structure that forms look more amorphous marked by a widening diffraction peak intensity decreased crystals