| 1. |
- Keis, K., et al.
(författare)
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Nanostructured ZnO electrodes for dye-sensitized solar cell applications
- 2002
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Ingår i: Journal of Photochemistry and Photobiology A. - 1010-6030 .- 1873-2666. ; 148:03-jan, s. 57-64
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Tidskriftsartikel (refereegranskat)abstract
- Dye-sensitized photoelectrochemical solar cells constitute a promising candidate in the search for cost-effective and environment-friendly solar cells. The most extensively studied, and to date the most efficient systems are based on titanium dioxide. In this paper, the possibilities to use nanostructured ZnO electrodes in photoelectrochemical solar cells are investigated. Various experimental techniques (e.g. infrared, photoelectron, femtosecond and nanosecond laser spectroscopies, laser flash induced photocurrent transient measurements, two and three-electrode photoelectrochemical measurements) show that the thermodynamics, kinetics and charge transport properties are comparable for ZnO and TiO2. The preparation techniques of ZnO provide more possibilities of varying the particle size and shape compared to TiO2. However, the dye-sensitization process is more complex in case of ZnO and care needs to be taken to achieve an optimal performance of the solar cell.
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| 2. |
- Evangelou, Evangelos, et al.
(författare)
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A meta-analysis of genome-wide association studies identifies novel variants associated with osteoarthritis of the hip
- 2014
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Ingår i: Annals of the Rheumatic Diseases. - : BMJ. - 1468-2060 .- 0003-4967. ; 73:12, s. 2130-2136
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Tidskriftsartikel (refereegranskat)abstract
- Objectives Osteoarthritis (OA) is the most common form of arthritis with a clear genetic component. To identify novel loci associated with hip OA we performed a meta-analysis of genome-wide association studies (GWAS) on European subjects. Methods We performed a two-stage meta-analysis on more than 78 000 participants. In stage 1, we synthesised data from eight GWAS whereas data from 10 centres were used for 'in silico' or 'de novo' replication. Besides the main analysis, a stratified by sex analysis was performed to detect possible sex-specific signals. Meta-analysis was performed using inverse-variance fixed effects models. A random effects approach was also used. Results We accumulated 11 277 cases of radiographic and symptomatic hip OA. We prioritised eight single nucleotide polymorphism (SNPs) for follow-up in the discovery stage (4349 OA cases); five from the combined analysis, two male specific and one female specific. One locus, at 20q13, represented by rs6094710 (minor allele frequency (MAF) 4%) near the NCOA3 (nuclear receptor coactivator 3) gene, reached genome-wide significance level with p=7.9x10(-9) and OR=1.28 (95% CI 1.18 to 1.39) in the combined analysis of discovery (p= 5.6x10(-8)) and follow-up studies (p=7.3x10(-4)). We showed that this gene is expressed in articular cartilage and its expression was significantly reduced in OA-affected cartilage. Moreover, two loci remained suggestive associated; rs5009270 at 7q31 (MAF 30%, p=9.9x10(-7), OR=1.10) and rs3757837 at 7p13 (MAF 6%, p=2.2x10(-6), OR=1.27 in male specific analysis). Conclusions Novel genetic loci for hip OA were found in this meta-analysis of GWAS.
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| 3. |
- Keis, K, et al.
(författare)
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Nanostructured ZnO electrodes for photovoltaic applications
- 1999
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Ingår i: NANOSTRUCTURED MATERIALS. - : PERGAMON-ELSEVIER SCIENCE LTD. - 0965-9773. ; 12:1-4, s. 487-490
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Photoelectrochemical properties of nanostructured ZnO (wurtzite) electrodes have been investigated. Studies were carried out on various types of electrodes with controlled morphology, particle size and doping. The monochromatic photon-to-current conversio
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| 4. |
- Keis, K, et al.
(författare)
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Photoelectrochemical properties of nano- to microstructured ZnO electrodes
- 2001
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Ingår i: JOURNAL OF THE ELECTROCHEMICAL SOCIETY. - : ELECTROCHEMICAL SOC INC. - 0013-4651. ; 148:2, s. A149-A155 Language: English
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Tidskriftsartikel (refereegranskat)abstract
- The photoelectrochemical properties of ZnO electrodes were investigated in the near-UV region. Studies were carried out on electrodes with different morphologies, porosities, and him thicknesses in order to probe the influence of these;parameters on the p
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| 5. |
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| 6. |
- Keis, K, et al.
(författare)
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Studies of the adsorption process of Ru complexes in nanoporous ZnO electrodes
- 2000
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Ingår i: LANGMUIR. - : AMER CHEMICAL SOC. - 0743-7463. ; 16:10, s. 4688-4694
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Tidskriftsartikel (refereegranskat)abstract
- Nanostructured ZnO films consisting of 150-nm sized particles were dye-sensitized with different ruthenium complexes. Incident photon-to-current conversion efficiencies (IPCE) were found to be dependent on dye concentration and on residence time of the Zn
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| 7. |
- Vayssieres, L, et al.
(författare)
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Purpose-built anisotropic metal oxide material: 3D highly oriented microrod array of ZnO
- 2001
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Ingår i: JOURNAL OF PHYSICAL CHEMISTRY B. - : AMER CHEMICAL SOC. - 1089-5647. ; 105:17, s. 3350-3352 Language: English
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Tidskriftsartikel (refereegranskat)abstract
- We are reporting here on the inexpensive fabrication of large three-dimensional and highly oriented porous microrod array of n-type ZnO semiconductor with a unique designed architecture consisting of well-defined, length-tailored, monodisperse, perpendicu
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| 8. |
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