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 substrate Jin Zhang a , ... 1. Schematic representation of the patterning process of the ZnO NW arrays on silicon substrate. 2. Experimental 2.1. Preparation of the AZO s...
Ngày tải lên: 06/05/2014, 13:22
large-scale hydrothermal synthesis of wo3 nanowires in the presence of k2so4
... 40 g. 3906 X.C. Song et al. / Materials Letters 61 (2007) 3904–3908 surrounding conditions such as temperature, pressure, and composition of the solution [21]. The formations of nanowires first ... the content of the assisted K 2 SO 4 plays an important role in the specific morphologies of WO 3 . No nanowires of WO 3 could be obtained without K 2 SO 4 , and the purity of the...
Ngày tải lên: 20/03/2014, 13:04
hydrothermal synthesis and characterization of tio2 nanorod arrays on glass substrates
... hydrothermal preparation conditions. The structure of rutile consists of chains of TiO 6 octahedra along the c-axis [23]. The TiO 6 octahedra in the chain connect through one shared edge, while ... is well known, surface features of a substrate have strong impact on the morphology of one-dimensional material grown on the substrate. Therefore, pre-treatment of the substrate i...
Ngày tải lên: 19/03/2014, 16:48
a rapid hydrothermal synthesis of rutile sno2 nanowires
... ammonia solution and forms Sn(OH) 2− 6 anions. Sn(OH) 4 hydrothermal condition −→ SnO 2 + 2H 2 O (7) (Sn(OH) 6 ) 2− hydrothermal condition −→ SnO 2 + 2H 2 O + 2OH − (8) The concentration of tin ... tin ions in solution is of influencing to the diameter of nanowires. We found that the molar ratio of Sn 4+ ,to OH − , ions for the optimal growth of elongated SnO 2 nanowires is 1:...
Ngày tải lên: 19/03/2014, 16:47
hydrothermal synthesis of dumbbell-shaped zno microstructures
... 1C). Pre- vious works show that the high concentration of NH 3 Á H 2 Ois favorable for the formation of ZnO with rod-like morphology [30]. The concentration of NH 3 Á H 2 O is 15 mol/L in present experiment, ... synthesized ZnO nanorod arrays on glass substrates by hydrothermal process. Besides, Qin et al. [20] reported the bush-like ZnO nanosheets film on conductive transp...
Ngày tải lên: 06/05/2014, 13:24
microwave assisted hydrothermal synthesis of single crystalline zno nanorods for
... assisted hydrothermal synthesis of single crystalline ZnO nanorods for gas sensor application Prabhakar 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 various temperatures...
Ngày tải lên: 06/05/2014, 13:24
sol–gel assisted hydrothermal synthesis of zno microstructure
... activity of ZnO is strongly influenced by the 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 inconsistent with the concept of ‘‘green’’ chemistry that is utilization...
Ngày tải lên: 06/05/2014, 13:26
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 ... discussion Heating 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 typical SEM image of the pr...
Ngày tải lên: 16/03/2014, 15:04
Synthesis of silicon nanowires after hydrogen radical treatment
... Synthesis of silicon nanowires after hydrogen radical treatment Minsung Jeon ⁎ , Koichi Kamisako Department of Electronic and Information Engineering, Tokyo University of Agriculture ... catalysts, such as the dispersion of nano-size metal particles, electroless metal deposition, laser ablation, evaporation, and immobilization of metal colloidal suspensions [13–16]. In this arti...
Ngày tải lên: 16/03/2014, 15:13
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 Na 2 WO 4 in a low pH region is one of ... condition and their size distribution evaluated from TEM observations. Fig. 2. XRD patterns of (a) particles obtained in the standard condition and (b) standard of WO 3 ·H...
Ngày tải lên: 19/03/2014, 16:48