01930nas a2200253 4500008004100000022001400041245011800055210006900173260009500242300001200337490000800349520100900357653000801366653002001374653001401394653002301408653001401431653000801445100002201453700002101475700002601496700002501522856012901547 2015 eng d a0021-979700aMethod to form semiconductor quantum dot (QD) thin films by igniting a flame at air-liquid interface: CdS and WO30 aMethod to form semiconductor quantum dot QD thin films by igniti a525 B ST, STE 1900, SAN DIEGO, CA 92101-4495 USAbACADEMIC PRESS INC ELSEVIER SCIENCEcFEB a121-1280 v4393 a

We reveal an easy, inexpensive, efficient one step flame synthesis of semiconductor/metal oxide thin films at air-liquid interface, subsequently, transferred on suitable substrate. The method has been illustrated by the formation of CdS and Wo(3) QDs thin films. The features of the present method are (1) Growth of thin films consisting of 0.5-2.0 nm sized Quantum Dots (QDs)/(ultra-small nanoparticles) in a short time, at the air-liquid interface which can be suitably transferred by a well-known Blodgett technique to an appropriate substrate, (2) The method is suitable to apply layer by layer (LbL) technique to increase the film thickness as well as forming various compositions as revealed by AFM measurements. The films are characterized for their structure (SAED), morphology (TEM), optical properties (UV-Vis.) and photoluminescence (PL). Possible mechanism of formation of QDs thin film and effect of capping in case of COS QDs is discussed. (C) 2014 Elsevier Inc. All rights reserved.

10aCdS10aFlame synthesis10ainterface10aQuantum Dots (QDs)10athin film10aWO31 aJadhav, Aarti, H.1 aPatil, Sagar, H.1 aSathaye, Shivaram, D.1 aPatil, Kashinath, R. uhttps://library.ncl.res.in/content/method-form-semiconductor-quantum-dot-qd-thin-films-igniting-flame-air-liquid-interface-002387nas a2200265 4500008004100000022001400041245012100055210006900176260000900245300001100254490000800265520152600273653001701799653001801816653000801834100002201842700001801864700001901882700002401901700001801925700001801943700001601961700001801977856012601995 2020 eng d a0924-424700a2-D to 3-D conversion of WO3 nanostructures using structure directing agent for enhanced NO2 gas sensing performance0 a2D to 3D conversion of WO3 nanostructures using structure direct cAPR  a1118820 v3043 a

An exotic 3-D tungsten oxide (WO3) microflower was synthesized via low-cost and environmental-friendly hydrothermal strategy. The effect of structure-directing agent on the formation of 3-D microflowers from a 2-D nanosheets of WO3 and its gas sensing behavior are investigated. The assynthesized WO3 powder was used in morphological, structural and phase studies by X-ray diffraction (XRD), scanning electron microscopy (SEM), FT-Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The WO3 samples were found to be polycrystalline with monoclinic crystal structure. The SEM micrographs revealed the formation of 3-D microflowers made up of two-dimensional (2-D) multi-directional dendritic nanoplates. The potassium hydroxide (KOH) acts as a structure-directing agent in the formation of 3-D microflowers of WO3 sample. To further understand the formation of 3-D microflowers of WO3 sample, concentration-dependent experiments were carried out by varying KOH concentration and the formation mechanism was investigated. The synthesized WO3 microstructures were subjected to detailed gas sensing tests for different gases at an optimized temperature. A selective, sensitive gas response was obtained for WO3 gas sensor. The lower detection limit is about 1 ppm at 150 degrees C working temperature for an optimized WO3 gas sensor. The gas sensing results indicate that the 3-D microflower-like WO3 nanostructures are highly promising for applications as gas sensors. (C) 2020 Published by Elsevier B.V.

10aMicroflowers10aNO2 detection10aWO31 aBeknalkar, S., A.1 aPatil, V., L.1 aHarale, N., S.1 aSuryawanshi, M., P.1 aPatil, A., P.1 aPatil, V., B.1 aKim, J., H.1 aPatil, P., S. uhttps://library.ncl.res.in/content/2-d-3-d-conversion-wo3-nanostructures-using-structure-directing-agent-enhanced-no2-gas02336nas a2200277 4500008004100000022001400041245011600055210006900171260000800240300001600248490000700264520140800271653002001679653002401699653001801723653002301741653000801764100002101772700002701793700002601820700001901846700002201865700001701887700002801904856012601932 2022 eng d a0272-884200aRu, Pd doped WO3 nanomaterials: a synergistic effect of noble metals to enhance the acetone response properties0 aRu Pd doped WO3 nanomaterials a synergistic effect of noble meta cJUN a17923-179330 v483 a

Noble metals (NMs) have an enormous impact on the intrinsic properties of the metal oxides. We report the synergistic effect of Ruthenium (Ru) and Palladium (Pd) noble metals on the enhancement of gas sensing properties of pure tungsten oxide (WO3). The gas sensing material is synthesized by simple and straight forward precipitation route, and its physico-chemical analyses are determined using XRD, FESEM, TEM/HRTEM, FFT, UV-Vis, XPS, EDAX, and BET measurements. Use of the developed material as a gas sensor is evaluated using several target gases (oxidizing as well as reducing), with acetone showing the best selectivity. The noble metal doping and hence catalytic action improved the gas response qualities. The synergistic effect of Ru and Pd on WO3 gas response properties are identified, where the effect is 99.80% sensitivity, and lower response/recovery time (10 s and 2 min) at 300 degrees C operating temperature. Nonetheless, the sensors displayed better gas sensing properties even at lower operating temperatures ranging from 200 to 275 degrees C. In addition, the synergistic effect has displayed the dramatic enhancement in the sensitivity to 76.44% at barely 10 ppm acetone concentration. This particular result will undoubtedly be helpful for diagnostic purpose of diabetic patients, and a strong candidate for prospective gas sensing applications, particularly acetone.

10aAcetone vapours10aPrecipitation route10aRu -Pd doping10asynergistic effect10aWO31 aKodam, Pavan, M.1 aGhadage, Pandurang, A.1 aNadargi, Digambar, Y.1 aShinde, K., P.1 aMulla, Imtiaz, S.1 aPark, J., S.1 aSuryavanshi, Sharad, S. uhttps://library.ncl.res.in/content/ru-pd-doped-wo3-nanomaterials-synergistic-effect-noble-metals-enhance-acetone-response