One step synthesis of monoclinic VO2 (B) bundles of nanorods: Cathode for Li ion battery

One of the metastable phases of vanadium dioxide, VO2(B) bundles of nanorods and microspheres have been synthesized through a simple hydrothermal method by dispersing V2O5 in aqueous quinol. The obtained products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and electrochemical discharge-charge test for lithium battery. It was found that the morphologies of the obtained VO2(B) can be tuned by manipulating the relative amount of quinol. The electrochemical test found that the bundles of nanorods exhibit an initial discharge capacity of 171 mAh g(-1) and its almost stabilized capacity was reached to 108 mAh g(-1) after 47 cycles at a current density of 0.1 mA g(-1). The formation mechanism of the VO2(B) bundles of nanorods and microspheres was also discussed. (C) 2012 Elsevier Inc. All rights reserved.

ABF_3:Eu,Gd(A:K,Li;B:Ba,Mg)中Gd~(3+)→Eu~(2+)的能量传递

通过高温固相反应法,在高纯N_2气氛中合成了BaLiF_3,KMgF_3中单掺和双掺Eu,Gd的ABF_3型复合氟化物。研究了各类掺杂体系的光谱特性,观察到了Gd~(3+)→Eu~(2+)的能量传递,分析了能量传递过程,探讨了能量传递机理,并讨论了Gd~(3+)和Eu~(2+)的取代格位。

Geometric bonding effects in the X2Ab>1b>, A2∑+b>ub>, and B<sup>2IIb>g b>states of Lib>2b>F

Published ab-initio and pseudopotential calculations for the dialkali halide systems suggest that the preferred co-linear geometry is for the metal to approach the metal end of the alkali halide. Here, ab-initio calculations on the Li2F system reveal that the well depth on the halide side in this radical is much deeper and is a local saddle-point associated with the ionic non-linear global minima. Although many features of the pseudopotential surfaces are confirmed, significant differences are apparent including the existence of a linear excited state instead of a triangular one, a considerably deeper global minimum some 50% lower in energy and a close approach between the X2A1 and the states, with the minimum 87 kJ mol-1 below the ground state asymptote. All the results can be rationalised as the avoided crossings between a long range, covalent potential dominant within the LiLiF geometry and an ionic state that forms the global minimum. Calculations on the 3rd 2A' potential indicate that even for Li + LiF collisions at ultracold temperatures the collision dynamics could involve as many as three electronic states.

Energy levels, radiative rates and electron impact excitation rates for transitions in He-like Li II, Be III, B IV and C V

We report calculations for energy levels, radiative rates and electron impact excitation rates for transitions in He-like Li II, Be III, B IV and C V. grasp (general-purpose relativistic atomic structure package) is adopted for calculating energy levels and radiative rates. For determining the collision strengths and subsequently the excitation rates, the Dirac atomic R-matrix code (darc) is used. Oscillator strengths, radiative rates and line strengths are reported for all E1, E2, M1 and M2 transitions among the lowest 49 levels of each ion. Collision strengths have been averaged over a Maxwellian velocity distribution and the effective collision strengths so obtained are reported over a wide temperature range up to 10(6) K. Comparisons have been made with similar data obtained from the flexible atomic code (FAC) to highlight the importance of resonances, included in calculations from darc, in the determination of effective collision strengths. Discrepancies between the collision strengths from darc and fac, particularly for weak transitions and at low energies, have also been discussed. Additionally, lifetimes are also listed for all calculated levels of the above four ions.

Thermoluminescence, structural and magnetic properties of a Li(2)O-B(2)O(3)-Al(2)O(3) glass system doped with LiF and TiO(2)

A Li(2)O-B(2)O(3)-Al(2)O(3) glass system, un-doped and doped with LiF, and/or TiO(2) was synthesized by the fusion method and its physical properties were investigated by thermoluminescence (TL), X-ray diffraction (XRD), electron paramagnetic resonance (EPR), atomic force microscopy (AFM) and differential thermal analysis (DTA). The samples were subjected to gamma-rays from a colbalt-60 ((60)Co) source. These techniques provided evidence of LiF and LiF doped with Ti crystal formation in the glass system. A TL glow peak at about 433 K was sensitive to (60)Co gamma-rays and showed good linearity with doses and consequently could be used to quantify radiation doses. Crown Copyright (C) 2011 Published by Elsevier B.V. All rights reserved.

ʿÎr ḥešb��n b��nā banîtî beyt-zevûl li-kevôd ... Mōrdek^ ay B��sqwiṣ

... ham-meḥabbēr ... Zekaryā Pôlôq

al- Juzʼ al-rābiʻ wa-al-khāmis min kitāb al-Intiṣār li-wāsiṭat ʻiqd al-amṣār

taʼlīf Ibrāhīm ibn Muḥammad ibn Aydamur al-ʻAlāʼī al-shahīr bi-Ibn Duqmāq.

Hādhā kitāb Maṭāliʻ al-anẓār

li-Ab�� al-Thanāʼ Shams al-Dīn ibn Maḥmūd ibn ʻAbd al-Raḥmān al-Iṣfahānī. Maʻa matnihi Ṭawāliʻ al-anwār / li-ʻAbd Allāh ibn ʻUmar al-Bayḍāwī. wa-bi-hāmishihimā Ḥāshiyat al-Sayyid al-Sharīf al-Jurjānī.

al- Taʻrīb��t al-shāfiyah li-murīd al-jughrāfiyah

Rifāʻah Badawī Rāfiʻ al-Ṭahṭāwī.

Kitāb Taḥrīr al-Uṣūl li-Ūqlīdis

min taʼlīf Khūjah Naṣīr al-Dīn al-Ṭūsī.

al- ʻAḍb al-Yamānī fī al-radd ʻan Shaykhinā Sīdī Aḥmad al-Tijānī

li-Ab�� al-ʻAbbās Aḥmad ibn Muḥammad ibn ʻAbd Allāh ibn Muḥammad ibn al-Qāḍī al-ʻAlawī nasaban al-Tijānī ṭarīqan al-Shinjīṭī ; bi-taṣḥīḥ Ab�� ʻAbd Allāh Muḥammad Jannūn.

Hādhihi Ḥāshiyat al-Sharīf al-faqīḥ al-ʻallāmah al-shāriḥ al-Mahdī ibn Muḥammad ibn al-Khiḍr al-Wazzānī ʻalá Sharḥ Ab�� ʻAbd Allāh Muḥammad ibn ʻAbd al-Qādir al-Fāsī li-naẓm Alqāb al-ḥadīth li-Ab�� ʻAbd Allāh al-ʻArab�� al-Fāsī

Lithograph.