Author
Claes-Göran Granqvist
Other affiliations: Chalmers University of Technology, Texas A&M University
Bio: Claes-Göran Granqvist is an academic researcher from Uppsala University. The author has contributed to research in topics: Electrochromism & Thin film. The author has an hindex of 73, co-authored 535 publications receiving 31523 citations. Previous affiliations of Claes-Göran Granqvist include Chalmers University of Technology & Texas A&M University.
Papers published on a yearly basis
Papers
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TL;DR: In this article, the authors discuss coatings for energy efficient windows of several different kinds with a view to the possibility of modelling their optical properties by effective medium theory, and special attention is given to spectrally selective noble-metal-based coatings with induced transmission due to voids.
Abstract: I discuss coatings for energy efficient windows of several different kinds with a view to the possibility of modelling their optical properties by effective medium theory Special attention is given to spectrally selective noble-metal-based coatings with induced transmission due to voids, angular selective metal coatings with oblique columnar microstructure, and tentative theoretical descriptions of chromogenic materials having dynamic radiative properties
25 May 2004
TL;DR: In this paper, WO3 nanoparticles were generated by gas deposition and the size distribution of the agglomerates was found to be log-normal, i.e., similar to the size distributions of the gas-phase nanoparticles forming the deposit.
Abstract: WO3 nanoparticles were generated by gas deposition. Deposits on Al substrates were studied by scanning force microscopy operated in the intermittent-contact (tapping) mode. At low surface coverage (< 0.5 %), we observed single nanoparticles with a mean size of ~ 1.5 nm. An increase of the amount of particles led to agglomerates, which appeared at surface coverages as low as 2 to 4 %. At full coverage the mean agglomerate size was ~ 5 nm. This value did not change as the sample was annealed at temperatures up to 250 °C. The size distribution of the agglomerates was found to be log-normal, i.e., similar to the size distribution of the gas-phase nanoparticles forming the deposit. For explaining the obtained log-normal size distribution of the agglomerates simulations of the agglomeration process were also carried out.
TL;DR: Some of the attacks on the Kirchhoff-law-Johnson-noise system are valid, however, an extended KLJN system remains protected against all of them, implying that its unconditional security is not impacted.
Abstract: This paper deals with the Kirchhoff-law-Johnson-noise (KLJN) classical statistical physical key exchange method and surveys criticism - often stemming from a lack of understanding of its underlying premises or from other errors - and our related responses against these, often unphysical, claims. Some of the attacks are valid, however, an extended KLJN system remains protected against all of them, implying that its unconditional security is not impacted.
Posted Content•
TL;DR: In this article, the integrator-and-fire model with white noise in the charging ion current was analyzed in the case of a single neuron and showed that it can produce significant lognormal features in its firing statistics.
Abstract: Even a single neuron may be able to produce significant lognormal features in its firing statistics due to noise in the charging ion current. A mathematical scheme introduced in advanced nanotechnology is relevant for the analysis of this mechanism in the simplest case, the integrate-and-fire model with white noise in the charging ion current.
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Journal Article•
28,685 citations
9,432 citations
TL;DR: Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability as discussed by the authors, and its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability.
Abstract: The richness of optical and electronic properties of graphene attracts enormous interest. Graphene has high mobility and optical transparency, in addition to flexibility, robustness and environmental stability. So far, the main focus has been on fundamental physics and electronic devices. However, we believe its true potential lies in photonics and optoelectronics, where the combination of its unique optical and electronic properties can be fully exploited, even in the absence of a bandgap, and the linear dispersion of the Dirac electrons enables ultrawideband tunability. The rise of graphene in photonics and optoelectronics is shown by several recent results, ranging from solar cells and light-emitting devices to touch screens, photodetectors and ultrafast lasers. Here we review the state-of-the-art in this emerging field.
6,863 citations
TL;DR: These nontoxic nanomaterials, which can be prepared in a simple and cost-effective manner, may be suitable for the formulation of new types of bactericidal materials.
5,309 citations