Monovalent sulfur oxoanions enable millimeter-long single-crystalline h-WO3 nanowire synthesis

Nanoscale ◽  
2020 ◽  
Vol 12 (16) ◽  
pp. 9058-9066 ◽  
Author(s):  
Guozhu Zhang ◽  
Chen Wang ◽  
Wataru Mizukami ◽  
Takuro Hosomi ◽  
Kazuki Nagashima ◽  
...  

Monovalent sulfur oxoanions (HSO4− and CH3SO3−), rather than the previously proposed SO42−, significantly promote the anisotropic nanowire growth of hexagonal WO3.

2013 ◽  
Vol 114 (4) ◽  
pp. 043514 ◽  
Author(s):  
Deok-kee Kim ◽  
Jeong Ho Shin ◽  
Ho Sun Shin ◽  
Jae Yong Song

2007 ◽  
Vol 101 (2) ◽  
pp. 024319 ◽  
Author(s):  
Haoshuang Gu ◽  
Yongming Hu ◽  
Jing You ◽  
Zhenglong Hu ◽  
Ying Yuan ◽  
...  

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
De-Gang Xie ◽  
Zhi-Yu Nie ◽  
Shuhei Shinzato ◽  
Yue-Qing Yang ◽  
Feng-Xian Liu ◽  
...  

Abstract Mass transport driven by temperature gradient is commonly seen in fluids. However, here we demonstrate that when drawing a cold nano-tip off a hot solid substrate, thermomigration can be so rampant that it can be exploited for producing single-crystalline aluminum, copper, silver and tin nanowires. This demonstrates that in nanoscale objects, solids can mimic liquids in rapid morphological changes, by virtue of fast surface diffusion across short distances. During uniform growth, a thin neck-shaped ligament containing a grain boundary (GB) usually forms between the hot and the cold ends, sustaining an extremely high temperature gradient that should have driven even larger mass flux, if not counteracted by the relative sluggishness of plating into the GB and the resulting back stress. This GB-containing ligament is quite robust and can adapt to varying drawing directions and velocities, imparting good controllability to the nanowire growth in a manner akin to Czochralski crystal growth.


2013 ◽  
Vol 384 ◽  
pp. 44-49 ◽  
Author(s):  
Song Tian ◽  
Hejun Li ◽  
Yulei Zhang ◽  
Shouyang Zhang ◽  
Yongjie Wang ◽  
...  

RSC Advances ◽  
2015 ◽  
Vol 5 (117) ◽  
pp. 96412-96415
Author(s):  
Qidong Li ◽  
Yanming Zhao ◽  
Qinghua Fan ◽  
Wei Han

Structurally uniform and well-doped single crystalline solid solution PrxNd1−xB6 nanowires were fabricated by a one-step CVD approach for the first time.


2021 ◽  
Vol 9 (5) ◽  
pp. 2291-2299
Author(s):  
Songyan Yin ◽  
Yu Wang ◽  
Charlie Kong ◽  
Bin Gong ◽  
Christopher E. Marjo ◽  
...  

Author(s):  
Joseph D. C. Peng

The relative intensities of the ED spots in a cross-grating pattern can be calculated using N-beam electron diffraction theory. The scattering matrix formulation of N-beam ED theory has been previously applied to imperfect microcrystals of gold containing stacking disorder (coherent twinning) in the (111) crystal plane. In the present experiment an effort has been made to grow single-crystalline, defect-free (111) gold films of a uniform and accurately know thickness using vacuum evaporation techniques. These represent stringent conditions to be met experimentally; however, if a meaningful comparison is to be made between theory and experiment, these factors must be carefully controlled. It is well-known that crystal morphology, perfection, and orientation each have pronounced effects on relative intensities in single crystals.The double evaporation method first suggested by Pashley was employed with some modifications. Oriented silver films of a thickness of about 1500Å were first grown by vacuum evaporation on freshly cleaved mica, with the substrate temperature at 285° C during evaporation with the deposition rate at 500-800Å/sec.


2013 ◽  
Vol 58 (2) ◽  
pp. 142-150 ◽  
Author(s):  
A.V. Sachenko ◽  
◽  
V.P. Kostylev ◽  
V.G. Litovchenko ◽  
V.G. Popov ◽  
...  

2014 ◽  
Vol 29 (11) ◽  
pp. 1199
Author(s):  
LI Xiao-Shuai ◽  
WANG Zeng-Mei ◽  
ZHU Ming-Fang ◽  
WANG Shan-Peng ◽  
TAO Xu-Tang ◽  
...  
Keyword(s):  

2003 ◽  
Vol 762 ◽  
Author(s):  
Hwang Huh ◽  
Jung H. Shin

AbstractAmorphous silicon (a-Si) films prepared on oxidized silicon wafer were crystallized to a highly textured form using contact printing of rolled and annealed nickel tapes. Crystallization was achieved by first annealing the a-Si film in contact with patterned Ni tape at 600°C for 20 min in a flowing forming gas (90 % N2, 10 % H2) environment, then removing the Ni tape and further annealing the a-Si film in vacuum for2hrsat600°C. An array of crystalline regions with diameters of up to 20 μm could be formed. Electron microscopy indicates that the regions are essentially single-crystalline except for the presence of twins and/or type A-B formations, and that all regions have the same orientation in all 3 directions even when separated by more than hundreds of microns. High resolution TEM analysis shows that formation of such orientation-controlled, nearly single crystalline regions is due to formation of nearly single crystalline NiSi2 under the point of contact, which then acts as the template for silicide-induced lateral crystallization. Furthermore, the orientation relationship between Si grains and Ni tape is observed to be Si (110) || Ni (001)


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