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[en] A semi-solid state electrochromic device with deep eutectic solvent gel as the electrolyte, Ethyl-viologen as the electrochromic compound, and K4Fe(CN)6 as the electron donor was reported. Four kinds of silica were simply mixed with ethaline for preparing the gel electrolyte, and the hydrophilic ones were found to be capable of being used as the gelling agent. To enhance the electron transfer at the electrode/gel interface and keep the transparency of the electrode, tiny amount of Au was electrochemically deposited on the FTO electrode. The as-prepared electrochromic device shows a coloration time of ca. 60 s at −0.7 V with the coloration efficiency of 91 cm2/C, and a bleaching time of ca. 150 s at 0 V with the efficiency of 194 cm2/C. The reversible response of the electrochromic device up to 820 cycles with ΔTmax > 60% was also demonstrated.
[en] This paper presents the swift heavy ions irradiation effects in commercial Gd-doped YBCO (YGdBaCuO) coated conductors irradiated by 1.9 GeV Ta ions with a wide range of ion fluences. Both continuous latent tracks produced by incident ions and nonuniform inclusions induced during film manufacture can be observed from TEM images, proving the existence of mixed-pinning landscapes. Onset critical temperature T is almost unchanged (△T ≈ 0.5 K) when irradiated at optimal fluence of 5.0 × 10 ions/cm, whereas in-field critical current J increased to a factor of more than 2 over a wide range of magnetic field at 77 K. Moreover, the value of α in power-law regime has been reduced to 0.31, compared to 0.72 for pristine sample, indicating slower J decay with magnetic field after Ta ions irradiation. Peak value of J/J curve appears when external magnetic field is near matching field at which the density of vortice equal to ion fluence. Experimental results proving that latent tracks can further enhance in-field current-carrying capability of commercial YBCO coated conductors.
[en] The latent tracks in mono- and few-layer molybdenum disulfide (MoS_2) induced by "2"0"9Bi ions with energies of 0.45-1.23 GeV were characterized by atomic force microscopy (AFM). The hillock-like latent tracks were observed on the surface of irradiated monolayer MoS_2. The diameter of the hillock after deconvolution procedure is 15.8± 1.7 nm and the height is 1.0±0.3 nm. Hillock-like tracks are induced by energy transfer from energetic "2"0"9Bi ions to electron system of MoS_2, resulting in the ionization and excitation and then the displacement of target atoms. Since Raman spectroscopy is sensitive to damages induced by swift-heavy ion irradiation, the in-plane E_2_g"1 mode (∝385 cm"-"1) and the out-of-plane A_1_g mode (∝408 cm"-"1) of MoS_2 were investigated. With increasing ion fluence, the A_1_g peak shifts to higher frequencies, and the intensity ratio between A_1_g and E_2_g"1 peak increases. Besides, the A_1_g peak narrows. The evolution of the structural and vibrational properties of MoS_2 with fluence is discussed. It can be concluded that the blue shift and narrowing of A_1_g peak in irradiated MoS_2 is due to the adsorption of oxygen molecules at latent tracks. With decreasing thickness of MoS_2, the irradiation resistance decreases. (orig.)