共查询到20条相似文献,搜索用时 125 毫秒
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本文推导出正二十面体(I_h)对称的同系碳簇C_(60k ̄2)π-轨道的群约化通式;在紧束缚(Huckel)方案下,应用Lanczos三对用比方法,对每一类不可约表示仅需造出一个基函数作为起始态,便可使60k ̄2×60k ̄2久期方程达到理想的方块化,系统地求出了C_(60)—C_(2160)(k=1—6)按不可约表示分类的方块本证多项式和能级的解析形式(但五次以上代数方程只能求数值报)。文中叙述本方法的梗概,示范C_(60),C_(240)及C_(540)的计算结果。 相似文献
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OpticalLimitingEffectofSiO_2GelContainingC_(60)¥XIAHaiping;ZHUCongshan;GANFuxi(ShanghaiInstituteofOpticsandFineMechanics,Acad... 相似文献
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LIU Shutian 《Chinese Journal of Lasers》1995,4(3):275-280
OpticalAssociativeMemoryBasedonDoublePhaseConjugationUsingBi_(12)TiO_(20)PhotorefractiveFiber¥LIUShutian(DepartmentofPhysics,... 相似文献
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用FeCl3·6H2O与C60(含C70)固体混合,经研磨得含C60(C70)的络合物[Fe(C60)]·ClO和[Fe(C70)]·ClO,该物呈棕黑色,具有吸水性 相似文献
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新型物理喷束淀积技术制备富勒烯薄膜 总被引:2,自引:1,他引:1
建立了一套新型物理喷束淀积装置,并且成功地进行了薄膜制备工作,所制备的薄膜包括C60,C70,PVK,PVK/C60等薄膜,并测量了物理喷束淀积技术制备得的C60薄膜,PVK/C60混合膜的吸收光谱,荧光光谱,时间分辨率荧光光谱,与C60等薄膜的高真空蒸发膜的相应光谱进行了比较,结果表明,物理喷束淀积可以制备具有很好质量的高抗光损伤薄膜,薄膜的荧光衰减特性与蒸发膜有很大差别。采用该法制备的PVK/ 相似文献
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PVK/C_(60)组合体系薄膜的拉曼光谱和荧光光谱研究 总被引:1,自引:0,他引:1
我们采用物理喷束淀积技术制备了C60、C70及聚乙烯咔唑PVK/C60的混合和分层薄膜,拉曼光谱的测量表明,这种技术所制备的富勒烯薄膜中,富勒烯的笼型结构仍保持完整,而在PVK/C60组合薄膜中,拉曼光谱及荧光光谱测量表明:在PVK和C60分子之间存在激发传递过程,在混合膜中,这种激发传递过程要明显强于分层组合薄膜。 相似文献
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The Unconventional Influence of a Nearby Molecule onto Transport of Single C_(60) Molecule Transistor 下载免费PDF全文
《中国物理快报》2019,(12)
We study the transport property of single C_(60) molecular transistors with special focus on the situation that other molecules are in vicinity. The devices are prepared using electromigration and thermal deposition techniques. Pure single C_(60) molecule transistors show typical coulomb blockade behavior at low temperature. When we increase the coverage of molecules slightly by extending the deposition time, the transport spectrum of devices displays a switching behavior in the general coulomb blockade pattern. We attribute this unconventional phenomenon to the influence from a nearby C_(60) molecule. By analyzing this transport behavior quantitatively based on the parallel-double-quantum-dot model, the interaction from the nearby molecule is proved to be of capacity and tunneling coupling. Thermal stimulation is also applied to the device to investigate the effect of local charging environment variation on intermolecular interaction. 相似文献
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本文对非静水压淬火的 C_(60)样品进行了拉曼光谱研究。在14.8GPa 以上,C_(60)的1468cm~(-1)特征峰的频率和线宽保持不变,这是 fullerite 相己转变成“透明相”的拉曼光谱证据。在32GPa 以上,原 C_(60)的散射峰全部消失,只观察到两个新的弥散的弱散射峰。表明 C_(60)原子团簇已倒塌或严重畸变。 相似文献
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Thermodynamic and structural properties of polystyrene/C_(60) composites: A molecular dynamics study 下载免费PDF全文
《中国物理 B》2020,(2)
To tailor properties of polymer composites are very important for their applications.Very small concentrations of nanoparticles can significantly alter their physical characteristics.In this work,molecular dynamics simulations are performed to study the thermodynamic and structural properties of polystyrene/C_(60)(PS/C_(60)) composites.The calculated densities,glass transition temperatures,and coefficient of thermal expansion of the bulk PS are in agreement with the experimental data available,implying that our calculations are reasonable.We find that the glass transition temperature Tg increases accordingly with an added concentration of C_(60) for PS/C_(60) composites.However,the self-diffusion coefficient D decreases with increase of addition of C_(60.)For the volumetric coefficients of thermal expansion(CTE) of bulk PS and ps/C_(60) composites,it can be seen that the CTE increases with increasing content of C_(60) above Tg(rubbery region).However,the CTE decreases with increasing content of C_(60) below Tg(glassy region). 相似文献
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Preferable Orientations of Interacting C_(60) Molecules inside Single Wall Boron Nitride Nanotubes 下载免费PDF全文
《中国物理快报》2016,(5)
This work focuses on the preferable orientation analysis of the hybrid system where the Ceo molecules are encapsulated inside the boron nitride nanotubes by using the two-molecule model.The low-energy state can be acquired in the contour map,which provides the visual information of the systematical van der Waais interaction potential for the Ceo molecules adopting different orientations.Our results show that the C_(60) molecules exhibit the preferred pentagon and hexagon orientations with the tube's diameter smaller and larger than 13.55 A,respectively.The preferred two-bond orientation obtained in the single-molecule model is absent in this study,indicating that the intermolecular interaction of adjacent C_(60) molecules plays an important role in the orientational behaviors of this peapod structure. 相似文献
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星状C60(CH3)x(PAN)x共聚物的光致发光研究 总被引:1,自引:0,他引:1
利用物理喷束淀积(PJD)技术制备C60(CH3)x(PAN)x共聚物的薄膜。这种共聚物中,C60分子位于星状结构的中心,聚丙烯腈(PAN)主链修饰在C60分子的周围。吸收及荧光光谱表明:C60分子与聚丙烯腈(PAN)有明显的相互作用,而且这种相互作用与PAN的链长有关。C60分子与PAN间存在一定的激发传递过程,从而导致PAN荧光的部分猝灭。 相似文献