应用化学2011，Vol.28Issue(8)：901-906,6.DOI:10.3724/SP.J.1095.2011.00606
烟草花叶病毒在受限空间下的自组装行为
Confined Evaporative Self-assembly of Tobacco Mosaic Virus
摘要
Abstract
Self-assembly of tobacco mosaic virus (TMV) particles by drying TMV buffeted solution constrained in a capillary tube, between two parallel glass slides and in a cylinder-on-flat geometry were studied, respectively. Optical microscopy (OM) and atomic force microscopy (AFM) were employed to characterize the patterns produced. Effect of the concentration of TMV on patterns was also explored. The results show that highly ordered structures could be fabricated under these three confined conditions which were attributed to the periodical, repetitive " stick-slip" motion of the contact line. Stripes parallel to The contact line but perpendicular to the long axis of the capillary tube were formed in a glass capillary tube after evaporation. As the solution front moved inward, both /(span of a stripe) and w( width of a stripe) gradually increased. When drying TMV buffered solution trapped between two glass slides, patterns in a tetramerous radial symmetry were produced. From each side of the slide, both / and w increased as stripes approached the longitudinal axis to the center. Parallel gradient straight stripes were obtained when TMV buffered solution was allowed to evaporate from a cylinder-on-flat geometry. As the contact line propagated from the capillary edge toward the cylinder/Si contact center, both / and w decreased. The values of / for the outermost, middle and innermost regions are 28.4, 20.9 and 8.4μm, respectively. While the values of w are 17.5, 9.2 and 0.8 μm, correspondingly. Moreover, the height of the stripe decreased from 33. 9 nm to 30.4 nm, finally to 29. 5 nm. In all patterns formed under these three kinds of confinement conditions, individual TMV particles aligned parallel to the contact line, which could not only relieve the strong dipole-dipole repulsion between TMV particles, but also effectively minimize the interfacial energy. Concentration of TMV had the same effect on patterns under these three confinements: both / and w increased with the increase of concentration until no stripe patterns were observed and continuous films of TMV were formed.关键词
受限蒸发/烟草花叶病毒/自组装Key words
confined evaporation, tobacco mosaic virus (TMV), self-assembly分类
化学化工引用本文复制引用
肖桂花,彭波,王倩,苏朝晖,林园..烟草花叶病毒在受限空间下的自组装行为[J].应用化学,2011,28(8):901-906,6.基金项目
基金委创新群体(50621302)、美国NSF CHE-0748690,DoD-W911 NF-09-1-236和DOE-BES资助项目 （50621302）
