نتایج جستجو برای: nanostructure and phase transition

تعداد نتایج: 16969299  

خوشبین فر, سهیل, رجب نژاد, محدثه, قاسمی زاد, عباس,

In this Research, the transition from equilibrium ignition to non-equilibrium burn was studied by DEIRA4 code for simple spherical targets with the dimensions of several mm. It consisted of inner DT fuel and outer Au layers driven by the 209Bi heavy ions beam. Because of their higher plasma opacity, it was expected that they could trap much of the produced charged particles, radiation or even f...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2005
Stefan Kirchner Lijun Zhu Qimiao Si D Natelson

Considerable evidence exists for the failure of the traditional theory of quantum critical points, pointing to the need to incorporate novel excitations. The destruction of Kondo entanglement and the concomitant critical Kondo effect may underlie these emergent excitations in heavy fermion metals (a prototype system for quantum criticality), but the effect remains poorly understood. Here, we sh...

Journal: :ACS nano 2016
Feng Zhou Wei Sun Karen B Ricardo Dong Wang Jie Shen Peng Yin Haitao Liu

DNA nanostructures are versatile templates for low cost, high resolution nanofabrication. However, due to the limited chemical stability of pure DNA structures, their applications in nanofabrication have long been limited to low temperature processes or solution phase reactions. Here, we demonstrate the use of DNA nanostructure as a template for high temperature, solid-state chemistries. We sho...

احمدوند, حسین, باقی, مرضیه, سلامتی, هادی, سهرابی, داوود, عبدالحسینی, اسماعیل, مرشدلو, تکتم, کاملی, پرویز,

Bi1.8Pb0.4Sr2-xBaxCa2.2Cu3Oy (x-0, 0.1, 0.2, 0.3) samples were prepared by a conventional solid state reaction method. The effect of Ba substitution at Sr site in Bi-2223 high-TC superconductors have been investigated by the XRD, SEM, dc electrical resistivity and ac susceptibility. XRD and SEM analysis indicated Ba substitution decreased temperature of 2223 phase formation. The highest 2223 ph...

میلانی مقدم, حسین, نصیریان, شهروز,

  In this letter, titania nanopowder and titania-silica nanocomposite were prepared using sol-gel method. Although the size of nanocrystallites and the mass fraction percent age of rutile phase ( after phase transformation ) were increased by increasing calcination in the two samples , their size in titania-silica nanocomposite was smaller than that in pure titania . Moreover, the calculations ...

Journal: :ACS nano 2014
Haotian Wang Zhiyi Lu Desheng Kong Jie Sun Thomas M Hymel Yi Cui

Molybdenum disulfide (MoS2) with the two-dimensional layered structure has been widely studied as an advanced catalyst for hydrogen evolution reaction (HER). Intercalating guest species into the van der Waals gaps of MoS2 has been demonstrated as an effective approach to tune the electronic structure and consequently improve the HER catalytic activity. In this work, by constructing nanostructur...

بهزادی‌مهر, علیرضا, خاکساری, زهرا, میرزا, بهروز,

In this paper, we considered cosmological constant as a variable and studied properties and the thermodynamics stability of BTZ black hole from a geometric perspective. Also, we examined the correspondence between thermodynamic curvature singularities and phase transitionpoints with different thermodynamic metrics. We found that theQuevedo metric cannot predict the phase transition points in tw...

Journal: :Science 2002
H Kraack B M Ocko P S Pershan E Sloutskin M Deutsch

The structure of organic monolayers on liquid surfaces depends sensitively on the details of the molecular interactions. The structure of a stearic acid film on a mercury surface was measured as a function of coverage with angstrom resolution. Unlike monolayers on water, the molecules were found here to undergo a transition from surface-parallel to surface-normal orientation with increasing cov...

Journal: :religious inquiries 0
shahla eslami assistant professor, department of philosophy, science and research branch, islamic azad university, i.r.i

in this article, in order to demonstrate the pragmatic elements of rawls’s viewpoint, the developmental path of his a theory of justice shall first be investigated. this development has two phases: in the first phase, justice has an ethical-philosophical basis. in a theory of justice, this phase is specifically shown under the title of theory of justice. in the second phase, justice has no phil...

2008
Hongshun Yang Yifen Wang

Physical properties are crucial to gelatin utilization and the physical properties are determined by structure. Therefore, it is important to investigate the nanostructure and physical properties of gelatin over the full range of concentrations which are widely applied in research and industry. Nanostructure of gelatin can be investigated by atomic force microscopy (AFM). However, it is hard to...

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