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It has been found that ball milling leads to the partial amorphization of the starting crystalline material. The content of amorphous phase in the milling products depends, in a rather complicated way, on the milling parameters. At the milling parameters adopted in the present study, the milling product was never fully amorphous.
The localized amorphization dramatically accelerates the reaction kinetics and thus enhances the overall performance for the oxygen evolution reaction (OER). Specifically, a strong correlation between the OER activity and the amorphization rate is discovered, and α-Ni 0.75 Fe 0.25 (OH) 2 with the highest amorphization rate of 78% achieves the ...
Herein, a synergic idea of selenium-rich configuration and amorphization was developed to construct selenium-rich amorphous CoSe₁₊ₓ nanodots for maximum exposure of more hydrogen-production selenium sites. For this purpose, the selenium-rich amorphous CoSe₁₊ₓ nanodots with an ultrasmall size (0.2-1 nm) and selenium-rich character ...
Mechanical amorphization of three chitosan samples with high, medium, and low molecular weight was studied. It is shown that there are no significant differences between the course of amorphization process in a planetary ball mill of chitosan with different molecular weights, and the maximum degree of amorphization was achieved in 600 s of high intensity mechanical action. Specific energy ...
Request PDF | On Jun 16, 2021, Duoduo Gao and others published Selenium-Rich Configuration and Amorphization for Synergistically Maximizing the Active-Center Amount of CoSe 1+ x Nanodots toward ...
The degree of amorphization was strongly linked to the maximum tablet temperature, which depended significantly on the SPION composition, doped SPION content, and the drug load. Complete amorphization and high apparent solubility were achieved in tablets with 20 wt % Mn 0.5 Fe 2.5 O 4 and 30 wt % celecoxib after 15 min of AMF exposure ...
amorphization selenium degree - zalencentrumlamain.nl Amorphization by ball milling A review ResearchGate. A new method for the preparation of amorphous alloys is the mechanical alloying process So far, three amorphization reaction types were observed when this technique is used. amorphization of different cellulose samples by ball milling.
Amorphization of Selenium Induced by High Energy Ball Milling. A SESSION 1 PHILIPPINE PRE COLONIAL LITERATURE PPTX: 84. Neurosurgeon And Mum. Read more. Analisa Amali Guru Ppd. Read more. ABG doc. Read more. Mike_B. Mike_B is a new blogger who enjoys writing. When it comes to writing blog posts, Mike is always looking for new and interesting ...
Structural and dynamic properties of Se structures of different degrees of disorder ranging from a 5% up to a 95% degree of amorphization are investigated and the results are compared to both the original crystalline data and results obtained from corresponding glass structures. We investigated Se structures of different degrees of disorder ranging from a 5% up to a 95% degree of amorphization.
Influence of amorphization-recrystallization processes on distribution of selenium and oxygen atoms implanted in silicon Author links open overlay panel Eugene Tishkovsky Konstantin Feklistov Alexey
fuse et al. reported the possibility to make amorphous selenium using mechanically stretch induced modification 2 and tani et al. started from a gese 2 compound obtained by melt-quenching to...
Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments have been performed at the ambient temperature and at a cryogenic temperature of -100 degrees C, respectively. The final milling products under both conditions were found to be a fully amorphous phase after several hours of mechanical milling.
Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments have been performed at the ambient temperature and at a cryogenic temperature of -100 ifmmode^circelsetextdegreefi{}C, respectively. The final milling products under both conditions were found to be a fully amorphous phase after several hours of mechanical ...
As the deformation temperature is far lower than the melting point of the alloy, the amorphization is clearly a solid-state process. Dynamic experiments were conducted at an initial temperature of 77 K, and the occurrence of amorphization is further promoted by this cryogenic deformation (fig. S3), which is attributed to the higher flow stress.
The mechanisms of the formation of titanium silicide from the reaction of a single thin film of Ti on the silicon substrate with different degrees of substrate amorphization were studied using diff...
The pressure-induced amorphization is investigated to be due to large displacements of Te atoms for which weak Te-Te bonds exist or vacancies are nearby. Upon decompressing to ambient conditions, the original cubic crystalline structure is restored for c -amorphous, whereas t -amorphous transforms to another amorphous phase that is similar to ...
Integral intensities of diffraction peaks of annealed crystal selenium decreased with increasing grinding time, and these peaks broadened due to lattice strains and reducing crystallite size during the grinding. ... M., Shirakawa, Y., Shimosaka, A. et al. Mechanically Strain-Induced Modification of Selenium Powders in the Amorphization Process ...
Amorphization and Fracture in Silicon Selenium(2) Nanowires: Molecular-Dynamics Simulations on Parallel Computer Architectures. Wei Li ... Li, Wei, "Amorphization and Fracture in Silicon Selenium(2) Nanowires: Molecular-Dynamics Simulations on Parallel Computer Architectures." (1996). LSU Historical Dissertations and Theses. 6199.
note = "Funding Information: The authors kindly appreciate the valuable advice and help of Prof. Arnon Bentur during all the stages of the investigation.
@misc{etde_20454264, title = {Amorphization of selenium induced by ball-milling: an XAFS study[The XAFS is stated for X-ray Absorption Fine Structure]} author = {Tao, Liu, Zhiyu, Wu, Tiandou, Hu, Jing, Zhang, Yaning, Xie, Yonghao, Zhao, and Ke, Lu} abstractNote = {The extended X-ray absorption fine structure (EXAFS) and respective near-edge absorption spectra (XANES) were recorded at low ...
the complicated way the milling parameters affect the content of amorphous phase in the milling products is a result of competition of two processes: amorphization due to deformation and...
The aim of the present study was to examine the regulation of selenium binding protein 1 (SELENBP1) expression in colorectal cancer (CRC). Samples of cancer tissue and adjacent normal mucosa were collected from 83 CRC patients, and analyzed for SELENBP1 expression by 2D-DIGE, immunoblotting, RT-PCR and immunostaining. Expression levels of SELENBP1, carcinoembryonic antigen (CEA) and alkaline ...
We investigated Se structures of different degrees of disorder ranging from a 5% up to a 95% degree of amorphization. Starting from a trigonal crystalline structure we applied different strategies to introduce disorder into the Se configurations by irradiating atoms from their crystalline equilibrium positions.
combining high-energy ball milling and direct-current-induced uniaxial amorphization of selenium induced by high energy ball milling pressing is now recognized as a method to improve the thermoelectric figure of merit of existing ther-moelectric materials.1,3,9,14 this improvement is believed to come from an. induced by high-energy ball milling - …
Pressure-induced amorphization occurs when the metastable extension of the melting curve (dT m /dP) of a low-density crystal phase is intercepted during compression 10 (here T m is the melting ...
The mechanisms of the formation of titanium silicide from the reaction of a single thin film of Ti on the silicon substrate with different degrees of substrate amorphization were studied using differential scanning calorimetry. With increased amorphization, an exothermic reaction prior to C49-TiSi2 formation was observed. X-ray diffraction discovered an unidentified phase together with Ti5Si3 ...
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Structural changes occurring in the crystalline element selenium upon high-energy ball milling has been studied. Milling experiments have been performed at the ambient temperature and at a cryogenic temperature of -100 °C, respectively.
The effect of the milling parameters rotation speed of the milling device and duration of milling on the phase composition of the products of milling of fully crystalline selenium has been investigated The milling was conducted using a planetary micromill and the phase composition of the milling products was determined by differential thermal analysis It has been found that ball milling …
Here, we show that the lithiation-induced amorphization of layered crystalline Pd3P2S8 activates this otherwise electrochemically inert material as a highly efficient hydrogen evolution catalyst.
2 College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China. 3 Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112, USA. 4 Collaborative Innovation Center of Quantum Matter, Beijing 100871, China. 5 Center for High Energy Physics, Peking University, Beijing 100871, China.
The primary goal of this dissertation is to investigate the structural and mechanical properties and dynamical fracture in SiSe$sb2$ nanowires using the molecular-dynamics (MD) simulation technique. The present work is the first study of SiSe$sb2$ nanowires. Large-scale simulations reported in this thesis are carried out with parallel multiresolution schemes for the long-range Coulomb and ...
@article{Gao2021SeleniumRichCA, title={Selenium-Rich Configuration and Amorphization for Synergistically Maximizing the Active-Center Amount of CoSe1+x Nanodots toward Efficient Photocatalytic H2 Evolution}, author={Duoduo Gao and Binbin Zhao and F. Chen and Huogen Yu and Jiajie Fan and Jiaguo Yu}, journal={ACS Sustainable Chemistry ...