نتایج جستجو برای: boron nitride cage

تعداد نتایج: 42349  

Journal: :journal of physical and theoretical chemistry 0
roya ahmadi associate professor- yadegar emam khomeini branch of islamic azad university elahe sadat mirkamali young researchers and elite clube, yadegar-e-imam khomeini (rah) shahre-rey branch, islamic azad university, tehran, iran

6-amino-1,2,4-triazolo[4,3-b][1,2,4,5]tetrazine (attz)is an explosive material, that has been synthesized from the reaction of 3,6-diaminotetrazine , with nitrous acid and then sodium azide. in the simplest terms, an explosive is defined as a substance, which on initiation by friction, impact, shock, spark, flame, heating, or any simple application of an energy pulse, undergoes a rapid chemical...

In this study, the performance of fullerene (C20) and boron nitride cage (B12N12) as a sensing material for detection of proline was evaluated by density functional theory. For this purpose, the structures of proline, C20, B12N12 and the derived products from the proline adsorption on the surface of nanostructures were optimized geometrically. Then, IR and Frontier molecular orbital calculation...

Journal: :The Journal of chemical physics 2007
Laura Koponen Lasse Tunturivuori Martti J Puska Risto M Nieminen

Optical absorption spectra have been calculated for a series of boron nitride fullerenelike cage structures BnNn of sizes n=12-36. The method used is a real-time, real-space implementation of the time-dependent density-functional theory, involving the full time propagation of the time-dependent Kohn-Sham equations. The spectra are found to be a possible tool for distinguishing between different...

2014
Takeo Oku Enrico Sciubba

Boron nitride (BN) nanomaterials were synthesized from LaB6 and Pd/boron powder, and the hydrogen storage was investigated by differential thermogravimetric analysis, which showed possibility of hydrogen storage of 1–3 wt%. The hydrogen gas storage in BN and carbon (C) clusters was also investigated by molecular orbital calculations, which indicated possible hydrogen storage of 6.5 and 4.9 wt%,...

2016
D. Baowan James M. Hill

In this letter we extend previously established results for nested carbon nanocones to both nested boron nitride and carbon-boron nitride nanocones. Based purely on mechanical principles and classical mathematical modelling techniques, we determine the energetically favourable structures for nested boron nitride and carbon-boron nitride nanocones. While only three apex angles for boron nitride ...

2013
Yafang Xue Qian Liu Guanjie He Kaibing Xu Lin Jiang Xianghua Hu Junqing Hu

The insulator characteristic of hexagonal boron nitride limits its applications in microelectronics. In this paper, the fluorinated hexagonal boron nitride nanosheets were prepared by doping fluorine into the boron nitride nanosheets exfoliated from the bulk boron nitride in isopropanol via a facile chemical solution method with fluoboric acid; interestingly, these boron nitride nanosheets demo...

Elahe Sadat Mirkamali Roya Ahmadi,

6-Amino-1,2,4-triazolo[4,3-b][1,2,4,5]tetrazine (ATTz)is an explosive material, that has been synthesized from the reaction of 3,6-diaminotetrazine , with nitrous acid and then sodium azide. In the simplest terms, an explosive is defined as a substance, which on initiation by friction, impact, shock, spark, flame, heating, or any simple application of an energy pulse, undergoes a rapid chemical...

In thisresearch, the formed reaction derivative of matter [b-5,1] Tetrazolo [4,2,1] Teriazine (TTA) with boron nitride cage Nano-structure was studied in different temperature conditions by DFT method. For this purpose, first, the materials on both sides of the reaction were the geometric optimization, then, calculation related to the thermodynamic parameters were done on all them. Then, the va...

2004
Rajendra R. Zope Brett I. Dunlap

We report all-electron, density-functional calculations with large Gaussian polarization basis set of the recently synthesized octahedral O B24N24 cage that is perfectly round by symmetry, and boron-nitride (BN) clusters that its existence might suggest. We consider whether it is energetically possible that the two halves of this round cage could cap the BN nanotubes, modeled by B28N28 and B32N...

Journal: :Physical review letters 2006
Masa Ishigami Jay Deep Sau Shaul Aloni Marvin L Cohen A Zettl

We have imaged boron nitride nanotubes with atomic scale resolution using scanning tunneling microscopy. While some nanotubes show the expected triangular lattice pattern, the majority of the nanotubes show unusual stripe patterns which break the underlying symmetry of the boron nitride lattice. We identify the origin of the symmetry breaking and demonstrate that conventional STM imaging analys...

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