Showing papers by "Claes-Göran Granqvist published in 1999"
TL;DR: Transmission electron microscopy, quantitative energy-dispersive x-ray analysis, and electron diffraction established that the crystals comprise at least three different types, found both in whole cells and thin sections, in Pseudomonas stutzeri AG259.
Abstract: One mechanism of silver resistance in microorganisms is accumulation of the metal ions in the cell. Here, we report on the phenomenon of biosynthesis of silver-based single crystals with well-defined compositions and shapes, such as equilateral triangles and hexagons, in Pseudomonas stutzeri AG259. The crystals were up to 200 nm in size and were often located at the cell poles. Transmission electron microscopy, quantitative energy-dispersive x-ray analysis, and electron diffraction established that the crystals comprise at least three different types, found both in whole cells and thin sections. These Ag-containing crystals are embedded in the organic matrix of the bacteria. Their possible potential as organic-metal composites in thin film and surface coating technology is discussed.
1,175 citations
TL;DR: In this article, a review of electrochromic WO3-based films and devices is presented for electronic structure and optical properties of crystalline wO3, and techniques for mak...
152 citations
TL;DR: In this article, the authors present a new model that explains lognormal particle size distributions from first principles in a physically realistic way, without coagulation, using a random residence time approach, where the time available for the particles to grow is random and determines the size distribution.
57 citations
TL;DR: In this article, a dye consisting of Cis-dithiocyanato-N -bis(2,2′-bipyridyl-4,4′-dicarboxylic acid) ruthenium (II) was incorporated by dipping the films into a solution of the dye in ethanol.
44 citations
TL;DR: In this paper, the authors describe composite proton electrolytes composed of nanosize zirconium phosphate or antimonic acid particles suspended in a polyvinyl acetate/glycerin gel matrix.
24 citations
TL;DR: Cr oxide films were produced by reactive dc magnetron sputtering in Ar+O 2 +H 2, and weak anodic electrochromism was found in acidic electrolytes.
17 citations
TL;DR: In this paper, a review of electrochromic WO3-based films and devices is presented for electronic structure and optical properties of crystalline wO3, and techniques for mak...
Abstract: This paper reviews recent work on electrochromic
W-oxide-based films and devices Computed data an
presented for electronic structure and optical
properties of crystalline WO3. Techniques for mak ...
16 citations
TL;DR: In this paper, the temperature dependence of the electrical resistivity of nanocrystalline thin Au films with grain size 10 - 76 nm has been analyzed and a sudden change in the power function, ρ ∝ Tn, was found at ∼10 K, where n = 1.7 in the range 5 - 10 K and n = 3.3 in the ranges 10 - 15 K. This effect disappears after annealing at 773 K for 0.5 h in air at atmospheric pressure.
Abstract: Nanocrystalline thin Au films with grain size 10 - 76 nm have been analyzed regarding the temperature dependence of the electrical resistivity. A sudden change in the power function, ρ ∝ Tn, was found at ∼10 K, where n = 1.7 in the range 5 - 10 K and n = 3.3 in the range 10 - 15 K. This effect disappears after annealing at 773 K for 0.5 h in air at atmospheric pressure. After the annealing the grain size was ∼ 100 nm. This is an indication of interference between electron-phonon scattering and electron-grain boundary scattering in nanocrystalline materials at low temperatures. The temperature coefficient of resistivity, TCR, increased with increasing grain size at any temperature and the position of the maximum TCR was shifted towards lower temperatures with increasing grain size.
4 citations