| 1. |
- Bashir, Tariq, et al.
(author)
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Surface Modification of Conductive PEDOT Coated Textile Yarns with Silicone Resin
- 2011
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In: Materials technology (New York, N.Y.). - : Maney Publishing. - 1066-7857 .- 1753-5557. ; 26:3, s. 135-139
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Journal article (peer-reviewed)abstract
- Electroactive textile fibres and fabrics have been used in smart and interactive clothing for medical,military and sports applications. The improved surface properties of conductive textiles are required for their successful integration in all of the above mentioned applications. This paper presents the production of conductive poly(3,4-ethylenedioxythiophene) (PEDOT) coated viscose yarns in longer length, i.e. 5 m, and the surface modification of the coated yarns by treating with silicone solution. The structural properties of silicone coated conductive yarns were then investigated by Fourier transform infrared spectroscopy and thermogravimetric analysis. The effect of silicone coating on the mechanical, electrical and hydrophobic properties was also evaluated and then compared with the PEDOT coated viscose yarns without surface treatment. Results show that the mechanical and hydrophobic properties of conductive yarns were improved by surface modification with silicone without affecting their structural properties. The surface modified PEDOT coated yarns could be used as pressure and stretch sensors in health care applications.
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| 2. |
- Karimipour, M., et al.
(author)
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Excellent growth of ZnS shell on Ag2S QDs using a photochemical-microwave irradiation approach and fabrication of their indoor QD thin film solar cells
- 2018
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In: Materials technology (New York, N.Y.). - : TAYLOR & FRANCIS LTD. - 1066-7857 .- 1753-5557. ; 33:12, s. 784-792
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Journal article (peer-reviewed)abstract
- In this report, a new two pots method using microwave-photochemical approaches was suggested for the fabrication of Ag2S@ZnS core-shells. UV-Vis and photoluminescence spectroscopies clearly proved the growth of ZnS shell on Ag2S cores. X-ray diffraction, Energy dispersive x-ray spectroscopy and transmission electron microscopy also indicated the formation of core-shell structure. To identify excellence growth of ZnS shell, Ag2S@ZnS core-shells were implemented for the fabrication of thin film solar cells. The fabricated cells showed a J-V character with 0.4%, 1 mA.cm(-2) and 0.43V and 54% as efficiency, J(SC), V-OC and fill factor, respectively. The cells showed also an increasing efficiency up to 0.8% upon the decrease of incident solar intensity to 10% of its standard. The results proved the cells are stable under sun light illumination that is promising for environmentally friendly fabrication of QD thin film solar cells.
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| 3. |
- Niska, John, et al.
(author)
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Hot isostatic pressing of high temperature superconducting ceramics
- 1994
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In: Materials technology (New York, N.Y.). - : Informa UK Limited. - 1066-7857 .- 1753-5557. ; 9:9-10, s. 211-215
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Journal article (peer-reviewed)abstract
- Large specimens of ceramic superconductors are difficult to solid-state sinter to full density, while maintaining superconductivity, without the high temperatures and pressures found in a hot isostatic press (HIP). HIPing can give highly dense, superconducting Bi2Sr2CaCu2O8 (Bi2212) and Bi2Sr2Ca2Cu3O10 (Bi2223) with only slight decomposition. If Y123 is HIPed to full density in a metal capsule, then the nonsuperconducting tetragonal phase forms as a result of decomposition. HIPing of CuO plus YBa2Cu3O7 gives highly dense, superconducting YBa2Cu4O8 (Y124), which is stable at high temperatures and oxygen pressures.
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| 4. |
- Yan, Chunsheng, et al.
(author)
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Techniques related to graphene biosensors and their potential combination with optical fibres
- 2011
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In: Materials technology (New York, N.Y.). - 1066-7857 .- 1753-5557. ; 26:4, s. 173-183
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Journal article (peer-reviewed)abstract
- From zero-dimensional fullerene to one-dimensional carbon nanotube and to two-dimensional graphene, nanostructures based on carbon element are always one of the most exciting topics in modern science and technology. The work published in the open literature dealing with the properties, synthesis and sensor applications of graphene is overviewed. The potential techniques to realise optical fibre graphene sensors are presented and discussed.
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| 5. |
- Zhu, Guangyu, et al.
(author)
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Evaluation of wear and corrosion resistances of laser cladding TaC/TiC/Stellite X-40 Co-based composite coatings on copper surface
- 2022
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In: Materials Technology. - : Informa UK Limited. - 1753-5557 .- 1066-7857. ; 37:9, s. 980-991
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Journal article (peer-reviewed)abstract
- The TaC/TiC/Stellite X-40 Co-based composite coatings with different contents were successfully cladded on a Cr-Zr-Cu alloy substrate. The microstructure, wear and corrosion resistance of the composite coatings were investigated by means of X-ray diffraction (XRD), optical microscope (OM), energy dispersive spectrometer (EDS), scanning electron microscope (SEM), sliding wear test, as well as corrosion test in 3.5% NaCl solution. The results showed that Ta and Ti atoms easily form Co3Ta and Co3Ti hard phases with Co to increasing the hardness of the coating. Compared with the substrate, the wear resistance, corrosion resistance and hardness of the composite coatings were significantly improved. The wear resistance of the 20 wt. % TaC and 10 wt. % TiC composite coatings were better than that of the substrate. When the TaC content was 20 wt. % and the TiC content was 15 wt. %, the coating with excellent corrosion resistance (-0.153V).
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| 6. |
- Nylander, Tommy
(author)
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Self-reporting biological nano-systems to study and control bio-molecular mechanisms on the single molecule level (BIOSCOPE)
- 2005
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In: Materials Technology. - 1066-7857. ; 20:1, s. 32-35
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Journal article (peer-reviewed)abstract
- Abstract in UndeterminedBearing in mind the potential and importance of enzymatic processes it is somewhat surprising that we are not yet able to fully exploit the possibilities that such processes offer. The main reason is that we do not know the mechanism on the molecular scale in terms of the interaction between the enzyme and the substrate or rather the assembly of substrate molecules (see Figure 1.). This is indeed an interfacial process on the molecular scale. Here we recall that the enzymes work at very low concentrations. Thus under relevant conditions the effect of this isolated enzyme molecule in terms of global properties, like interfacial tension, rheology and curvature, on the relatively large substrate interface is very limited or non-existing at all [1, 2]. It is well established that the local effects on the nanoscopic scale are very significant and understanding of their role in governing enzymatic processes is crucial for the progress of nano-science. Unfortunately, these local effects are not possible to be described and determined at the moment, since the relevant and required tools are not available.Current high-resolution methods, such as x-ray crystallography and NMR, have provided a vast array of structural detail for biological molecules [3,4], yet the output of these methods are limited by their static molecular view and ensemble averaging. Recent advances in optical imaging and biomechanical techniques have demonstrated that it is possible to make observations on the dynamic behaviour of single molecules, to determine mechanisms of action at the level of an individual molecule, and to explore heterogeneity among different molecules within a population. These studies have the potential to provide fundamentally new information about biological processes and are critical for a better understanding of molecular movement, dynamics, and function. Single molecule methods provide an alternative set of approaches that will lead to a more direct view of the action of molecules without the need to infer process or function from static structures. The conformational dynamics of biomolecules is crucial to their biological functions. Recent advances in room-temperature single molecule fluorescence spectroscopy allow for real-time observations of conformational motions of individual bio-molecules [5-7], in particular those on the nanometer scale through fluorescence resonance energy transfer (FRET)[7,8]. Single molecule photo-induced electron transfer allows probing the distance between a donor and acceptor (within a protein [9]) on the Ångstrom scale. Structural information of individual proteins can also be obtained directly nowadays by using the surface enhanced resonance Raman scattering technique (SERRS) [10,11]
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