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| 2. |
- Åkerlind, Christina, et al.
(författare)
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Polymer based devices with adaptable infrared reflection and transmission
- 2006
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Ingår i: "Organic optoelectronics and photonics II : 3-6 April, 2006, Strasbourg, France". - : SPIE - International Society for Optical Engineering. - 9780819462480
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Konferensbidrag (refereegranskat)abstract
- In the present work the infrared-transmission of PEDOT:PSS (poly(3,4-ethylenedioxythiophene):poly(styrensulfonat)) is being investigated using three different kind of electrochromic devises. PEDOT:PSS is an electrochromic conducting polymer able to change its optical properties when it is doped and undoped. The doping is achieved by a voltage applied across the cell. The optical properties are reversible if the polarity of the voltage is changed. We report here, to our knowledge, the first cell with adaptive transmission in the infrared wavelength range. The issue for this type of cell is that all the layers in the device must be transmissive in the whole relevant wavelength range. The results were further verified by construction of similar cells with different configuration giving adaptable reflectivity.
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| 3. |
- Akerlind, C, et al.
(författare)
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Optical properties and switching of a Rose Bengal derivative: A spectroscopic ellipsometry study
- 2011
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Ingår i: THIN SOLID FILMS. - : Elsevier Science B.V., Amsterdam.. - 0040-6090. ; 519:11, s. 3582-3586
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Tidskriftsartikel (refereegranskat)abstract
- Optical properties in terms of the complex-valued dielectric function were determined for spin-coated films of a Rose Bengal derivative using variable angle of incidence spectroscopic ellipsometry in the visible and infrared wavelength regions. In addition, the thickness and roughness of the films were determined and related to the solution concentration of Rose Bengal. Switching between two different oxidation states of the Rose Bengal derivative was investigated. The two states were chemically induced by exposure to vapors of hydrochloric acid and ammonia, respectively. A substantial and reversible change of the optical properties of the films was observed.
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| 4. |
- Kariis, H, et al.
(författare)
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Thioethylpyrrole monolayers on gold. A spectroscopic study in ultrahigh vacuum
- 1998
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Ingår i: JOURNAL OF PHYSICAL CHEMISTRY B. - : AMER CHEMICAL SOC. - 1089-5647. ; 102:34, s. 6529-6538
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The adsorption of 3-(2-thioethyl)pyrrole (3-TEP) and 1-(2-thioethyl)pyrrole (1-TEP) on gold has been studied in ultrahigh vacuum with infrared reflection absorption spectroscopy, X-ray photoelectron spectroscopy, and temperature-programmed desorption mass
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| 5. |
- Savage, Steven, et al.
(författare)
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Suited to defence
- 2010
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Ingår i: Materials world. - 0967-8638. ; 18:3, s. 31-33
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Tidskriftsartikel (refereegranskat)
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| 6. |
- Shanker, Ravi, et al.
(författare)
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Structurally Colored Cellulose Nanocrystal Films as Transreflective Radiative Coolers
- 2022
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Ingår i: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 16:7, s. 10156-10162
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Tidskriftsartikel (refereegranskat)abstract
- Radiative cooling forms an emerging direction in which objects are passively cooled via thermal radiation to cold space. Cooling materials should provide high thermal emissivity (infrared absorptance) and low solar absorptance, making cellulose an ideal and sustainable candidate. Broadband solar-reflective or transparent coolers are not the only systems of interest, but also more pleasingly looking colored systems. However, solutions based on wavelength-selective absorption generate not only color but also heat and thereby counteract the cooling function. Intended as coatings for solar cells, we demonstrate a transreflective cellulose material with minimal solar absorption that generates color by wavelength-selective reflection, while it transmits other parts of the solar spectrum. Our solution takes advantage of the ability of cellulose nanocrystals to self-assemble into helical periodic structures, providing nonabsorptive films with structurally colored reflection. Application of violet-blue, green, and red cellulose films on silicon substrates reduced the temperature by up to 9 °C under solar illumination, as result of a combination of radiative cooling and reduced solar absorption due to the wavelength-selective reflection by the colored coating. The present work establishes self-assembled cellulose nanocrystal photonic films as a scalable photonic platform for colored radiative cooling.
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| 7. |
- Uvdal, K, et al.
(författare)
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Tricyclohexylphosphine adsorbed on rhodium
- 1998
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Ingår i: LANGMUIR. - : AMER CHEMICAL SOC. - 0743-7463. ; 14:25, s. 7189-7196
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- Tricyclohexylphosphine (TCHP) adsorbates on rhodium, prepared both from solution and by sublimation in UHV are studied by X-ray photoelectron spectroscopy (XPS), infrared reflection-absorption spectroscopy (IRAS), and temperature-programmed desorption (TP
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