controllable hydrothermal synthesis of zno nanowires arrays on al-doped zno
controllable hydrothermal synthesis of zno nanowires arrays on al-doped zno
... hydrothermal synthesis of ZnO nanowires arrays on Al-doped ZnO seed layer and patterning of ZnO nanowires arrays via surface modification of substrateJin Zhanga, ... 1. Schematic representation of the patterning process of the ZnO NW arrays on silicon substrate.2. Experimental2.1. Preparation of the AZO seed layerIn ... air [19].2.2. Hydrothermal synthesis of the ZnO NWs on the ZnO and AZOseed layersVertically aligned ZnO NW arrays were grown in a Te on- linedstainless...
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large-scale hydrothermal synthesis of wo3 nanowires in the presence of k2so4
... 40 g.3906 X.C. Song et al. / Materials Letters 61 (2007) 3904–3908surrounding conditions such as temperature, pressure, and composition of the solution [21]. The formations of nanowires first ... the content of the assisted K2SO4plays an importantrole in the specific morphologies of WO3. No nanowires of WO3couldbe obtained without K2SO4, and the purity of the nanowires onlydepends ... content of KNO3, thedimension of nanoparticles only became smaller. Similarly, thenanorods and nanoparticles were obtained in the products with theaddition of NaNO3or Na2SO4. The nanowires...
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hydrothermal synthesis and characterization of tio2 nanorod arrays on glass substrates
... hydrothermal preparationconditions. The structure of rutile consists of chains of TiO6octahedra along the c-axis [23]. The TiO6octahedra in the chainconnect through one shared edge, while ... is well known, surface features of a substrate have strongimpact on the morphology of one-dimensional material grown on the substrate. Therefore, pre-treatment of the substrate is anMaterials ... electron diffraction (SAED) pattern of TiO2nanorods. The SAED inserted in the upper left corner of Fig. 8ademonstrates that TiO2nanorod is a single crystal. High-resolutionTEM image of one...
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a rapid hydrothermal synthesis of rutile sno2 nanowires
... ammonia solutionand forms Sn(OH)2−6anions.Sn(OH)4 hydrothermal condition−→ SnO2+ 2H2O (7)(Sn(OH)6)2− hydrothermal condition−→ SnO2+ 2H2O + 2OH−(8)The concentration of tin ... tin ions in solution is of influencing to thediameter of nanowires. We found that the molar ratio of Sn4+,toOH−, ions for the optimal growth of elongated SnO2 nanowires is1:20–25.4. ConclusionIn ... have only solu-tion. This can be explained by the fact that the quantity of nucleidepends on the precursor concentration and by increasing OH−ionconcentration means the decreasing Sn4+ion...
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hydrothermal synthesis of dumbbell-shaped zno microstructures
... 1C). Pre-vious works show that the high concentration of NH3Á H2Oisfavorable for the formation of ZnO with rod-like morphology[30]. The concentration of NH3Á H2O is 15 mol/L in presentexperiment, ... synthesized ZnO nanorod arrays on glass substrates by hydrothermal process. Besides, Qin et al.[20] reported the bush-like ZnO nanosheets film on conductivetransparent oxide substrates using a facile hydrothermal method ... vibration modes in ZnO [24]. The other twoabsorption peaks at 1631 and 1385 cm−1in FTIR spectrum of our sample are also assigned to ZnO [25,26]. The FTIRresults indicate the formation of ZnO...
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microwave assisted hydrothermal synthesis of single crystalline zno nanorods for
... assisted hydrothermal synthesis of single crystalline ZnO nanorods forgas sensor applicationPrabhakar Rai, Hyeon-Min Song, Yun-Su Kim, Min-Kyung Song, Pyong-Rok Oh,Jeong-Mo Yoon, Yeon-Tae Yu⁎Division ... these ZnO nanorods are single crys-talline in nature, with a growth direction along the c-axis.Fig. 2 shows the resistance change of ZnO nanorods at varioustemperatures and concentrations of ... This generally happens due to the increase of electron concentration on the surface of ZnO nanorods with increas-ing temperature. Furthermore, the response increased and recoverytime decreased...
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sol–gel assisted hydrothermal synthesis of zno microstructure
... activity of ZnO is strongly influenced bythe methods and conditions of preparation which have great ef-fects on the microstructures of the materials, such as crystal size,orientation and morphology, ... of ZnO fabricated by hydrothermal method [18].The surfactants or alkaline used in the reaction is inconsistentwith the concept of ‘‘green’’ chemistry that is utilization of non-toxic, environmentally ... in the concentration of [Zn(OH)4]2Àdue to the initial fastnucleation of ZnO. Hence, the absorption of OHÀ on the positivelycharged Zn-(0001) plane would dominate in the competition with[Zn(OH)4]2Àcomplexes....
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Carbon assisted synthesis of silicon nanowires
... corresponding to the (1 1 1) planes of silicon. The crystallinity of the nanowires is con-siderably higher when only argon was used instead of a mixture of argon and hydrogen. The role of hydrogen ... discussionHeating silicon powder at 1200 °C, in the ab-sence of any activated carbon, yields a small pro-portion of SiNWs. In Fig. 1a, we show a typicalSEM image of the product of such a reaction ... Y-shape, with arms of a uniformwidth of 200 nm, and a length of a few microns.Careful studies of the TEM images and electrondiffraction data may unravel the nature of thejunction.In Fig. 1c,...
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Synthesis of silicon nanowires after hydrogen radical treatment
... Synthesis of silicon nanowires after hydrogen radical treatmentMinsung Jeon⁎, Koichi KamisakoDepartment of Electronic and Information Engineering, Tokyo University of Agriculture ... catalysts,such as the dispersion of nano-size metal particles, electroless metaldeposition, laser ablation, evaporation, and immobilization of metalcolloidal suspensions [13–16]. In this article, ... image of the SiNWs. The inset shows a high-magnificationFE-SEM image of the SiNWs.Fig. 3. HR-TEM micrograph of the as-synthesized SiNW taken along the [110] directionand the SAED diffraction spots...
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hydrothermal synthesis of monodisperse wo3 - h2o square platelet particles
... distributions of properties such as response time, precise controls of properties,regular arrangement of particles on electrode, etc. Hydrothermal synthesis from Na2WO4in a low pH region isone of ... condition and their sizedistribution evaluated from TEM observations.Fig. 2. XRD patterns of (a) particles obtained in the standard condition and(b) standard of WO3·H2O on the basis of ... andcentrifuged again. Five sets of the centrifugation process werecarried out to wash completely.The effects of the preparation condition were examined byvarying either HCl concentration or temperature...
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Từ khóa: specific features of supercritical water for hydrothermal synthesisspecific features of hydrothermal synthesis under supercritical conditionsspecific features of supercritical hydrothermal synthesisgas phase synthesis of mtbe from isobutene and methanol on hpa based catalystsliquid phase synthesis of mtbe from isobutene and methanol on hpa based catalystsfire and grazing — a synthesis of human impacts on highland biodiversityNghiên cứu sự biến đổi một số cytokin ở bệnh nhân xơ cứng bì hệ thốngNghiên cứu tổ chức chạy tàu hàng cố định theo thời gian trên đường sắt việt namđề thi thử THPTQG 2019 toán THPT chuyên thái bình lần 2 có lời giảiGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitGiáo án Sinh học 11 bài 13: Thực hành phát hiện diệp lục và carôtenôitNGHIÊN CỨU CÔNG NGHỆ KẾT NỐI VÔ TUYẾN CỰ LY XA, CÔNG SUẤT THẤP LPWAN SLIDEPhối hợp giữa phòng văn hóa và thông tin với phòng giáo dục và đào tạo trong việc tuyên truyền, giáo dục, vận động xây dựng nông thôn mới huyện thanh thủy, tỉnh phú thọPhát triển mạng lưới kinh doanh nước sạch tại công ty TNHH một thành viên kinh doanh nước sạch quảng ninhPhát hiện xâm nhập dựa trên thuật toán k meansĐịnh tội danh từ thực tiễn huyện Cần Giuộc, tỉnh Long An (Luận văn thạc sĩ)Tìm hiểu công cụ đánh giá hệ thống đảm bảo an toàn hệ thống thông tinThơ nôm tứ tuyệt trào phúng hồ xuân hươngTổ chức và hoạt động của Phòng Tư pháp từ thực tiễn tỉnh Phú Thọ (Luận văn thạc sĩ)Quản lý nợ xấu tại Agribank chi nhánh huyện Phù Yên, tỉnh Sơn La (Luận văn thạc sĩ)chuong 1 tong quan quan tri rui roGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtGiáo án Sinh học 11 bài 14: Thực hành phát hiện hô hấp ở thực vậtTÁI CHẾ NHỰA VÀ QUẢN LÝ CHẤT THẢI Ở HOA KỲ