Search Results

You are looking at 1 - 10 of 1,180 items for :

  • "precursors" x
Clear All

Abstract  

A family of single source precursors, for the spray chemical vapor deposition (CVD) of chalcopyrite thin films (CuInS2), has been synthesized in good yields (ca. 65%). Newly synthesized compounds include [{L}2Cu(SR)2In(SR)2], (R=alkyl, aryl; L=neutral donor ligand). The use of the single source precursors provides an attractive alternative over conventionally used multi-source precursors, which are often toxic, air sensitive and pyrophoric. However, it is desirable that these thin films be processed on flexible polymer substrates such as KaptonTM. Therefore, milder deposition temperatures are needed to maintain the structural integrity of the underlying polymer substrates. By selective manipulation of the steric and electronic properties of the precursor, milder processing temperatures may be employed, while mainting the desired stoichiometry of the deposited films. Elucidation of the structures have been confirmed by the use of NMR. Thermal analytical techniques, differential scanning calorimetry (DSC) and thermogravimetric analysis (TG), have been employed to determine thermal profiles of each candidate compound.

Restricted access

Abstract  

The thermal behaviour of four coordination compounds (NH4)6[Y3Fe5(C4O5H4)6(C4O5H3)6]·12H2O, (NH4)6[Y3Fe5(C6O7H10)6(C6O7H9)6]·8H2O, (NH4)6[Er3Fe5(C4O5H4)6(C4O5H3)6]·10H2O and (NH4)6[Er3Fe5(C4O6H4)6(C4O6H3)6]·22H2O has been studied to evaluate their suitability for garnet synthesis. The thermal decomposition and the phase composition of the resulted decomposition compounds are influenced by the nature of metallic cations (yttrium-iron or erbium-iron) and ligand anions (malate or gluconate).

Restricted access

microstructure development of the prepared titania precursors. ETA measurements were carried out in argon using the NETZSCH DTA-ETA Type 404 equipment. Details concerning the ETA measurements are described in publications [ 15 , 16 ]. The samples for the ETA

Restricted access

. 43 940 943 Sefton, M. A., Francis, I. L. & Williams, P. J. (1993): The volatile composition of Chardonnay juices: A study by flavor precursor

Restricted access
Journal of Thermal Analysis and Calorimetry
Authors: Mauro da Silva, Flávio de Souza Carvalho, Tereza da Silva Martins, Márcia de Abreu Fantini and Paulo Isolani

precipitation [ 19 ], alumina template [ 20 ] thermal treatment of polymeric precursors [ 21 , 22 ], Pechini’s method [ 23 ], reverse micellar system [ 24 ], and solvothermal methods [ 25 ]. Among them, the polymeric precursor method is very attractive, since

Restricted access

coordinate to the metal cations forming different carboxylate coordination compounds. In this article, we report the synthesis of nanocrystalline nickel ferrite by the thermal decomposition of some organic precursors obtained in the reaction between

Restricted access

, reverse micelle technique, etc. [ 5 – 10 ]. This study deals with the synthesis of nickel-doped cobalt ferrite nanoparticles by employing the precursor combustion technique devised indigenously [ 11 – 16 ]. This technique makes use of novel

Restricted access

chemists have addressed this issue by developing new synthetic strategies and improving the existing ones to suit their requirements. Besides the existing age old methods like co-precipitation, precursor, sol–gel, new ones have also evolved for synthesizing

Restricted access

the microwave-assisted low temperature synthesis of nanosized SrTiO 3 powder from SrTiO(C 2 0 4 ) 2 4H 2 0 (STO) precursor. Experimental procedure Synthesis of STO precursor STO used in this study was

Restricted access