Deposition of poly(styrene/α-tert-butoxy-ω-vinyl-benzyl-polyglycidol) microspheres on mica plates crossing the liquid-air interface: Formation of stripe pattern
Deposition of poly(styrene/α-tert-butoxy-ω-vinyl-benzyl-polyglycidol) microspheres on mica plates crossing the liquid-air interface: Formation of stripe pattern
复制标题
聚(苯乙烯/α-叔丁氧基-ω-乙烯基-苄基-聚缩水甘油)微球在穿过液-气界面的云母板上的沉积：条纹图案的形成
DOI：
10.1021/la0499259
复制
发表时间：
2004
期刊：
影响因子：
3.9
通讯作者：
S. Slomkowski
中科院分区：
文献类型：
--
作者：
E. Przerwa;S. Sosnowski;S. Slomkowski
研究了聚（苯乙烯/α-叔丁氧基-ω-乙烯基-苄基-聚缩水甘油）微球吸附在无图案云母板上，从悬浮液中垂直通过水-空气界面形成的条状组装体。研究发现，有序组装体是由毛细作用力作用于穿过水-气边界的颗粒而形成的。在足够高的板块运动速率下（即，在适当的动态加载条件下），由于毛细力，接近水面的吸附微球开始在板上沿与板运动相反的方向滑动，并保持在水面以下。板块运动将新的吸附颗粒带到水-气界面，在那里颗粒聚集成聚集体。当颗粒聚集体较大时，毛细力不能克服剪切力，并且颗粒聚集体在水面上方的板上被撤回。在板的连续移动期间重复该过程导致形成吸附微球的非常规则分布的条带。规则分布的颗粒集合体的形成取决于悬浮液中微球的浓度。
Formation of stripelike assemblies of poly(styrene/alpha-tert-butoxy-omega-vinyl-benzyl-polyglycidol) microspheres adsorbed on nonpatterned mica plates moving perpendicularly from suspension of particles through the water-air interface has been observed. It was found that ordered assemblies were formed by capillary forces acting on particles crossing the water-air boundary. At sufficiently high rates of plate movement (i.e., at appropriate dynamic loading conditions) the adsorbed microspheres approaching the water surface begin sliding on the plate, due to capillary forces, in the direction opposite to the plate movement and are kept below the water surface. Plate movement brings new adsorbed particles to the water-air interface, where particles are assembled into aggregates. When particle aggregates are large, the capillary forces cannot overcome shearing forces and the particle assemblies are withdrawn on the plate above the water surface. This process repeated during continuous movement of the plate results in the formation of the quite regularly distributed stripes of adsorbed microspheres. Formation of the regularly distributed particle assemblies depends on concentration of microspheres in suspension.