Department of Polymer Science and Engineering, Dankook University, 126 Jookjeon-Dong, Suji-Gu, Yongin-Si, Gyeonggi-Do 448-701, Republic of Korea.
J Colloid Interface Sci. 2012 Oct 1;383(1):118-23. doi: 10.1016/j.jcis.2012.06.030. Epub 2012 Jun 20.
Morphologies of polystyrene-block-poly(2-vinylpyridine) copolymer (S2VP) thin films, which are forming poly(2-vinylpyridine) cylinders in bulk phase, were investigated by atomic force microscopy (AFM) and transmission electron microscopy (TEM) to account for their ordering behavior induced by solvent annealing. Initially, when the copolymer was dissolved in toluene, which is selective solvent for majority polystyrene (PS) blocks, and was spin-coated on Si substrates, dimple-type micellar structures of S2VP were formed. After the film was placed in a solvent-annealing chamber covered with a lid under the existence of chloroform, surface morphologies of S2VP were measured as a function of annealing time. In this study, it was found that the morphologies of S2VP thin film repeated the cycle of the creation and extinction of various morphologies on ordering process. Namely, S2VP exhibited the various transformations between different morphologies, including highly disordered state, cylinders normal to the plane, and cylinders parallel to the plane. Each of the morphologies observed here was employed as a template to synthesize gold (Au) nanoparticles or nanowires. The arrays of Au nano-objects were used to tune a surface plasmon resonance.
聚苯乙烯-聚（2-乙烯基吡啶）嵌段共聚物（S2VP）薄膜的形态，在本体相中形成聚（2-乙烯基吡啶）圆柱，通过原子力显微镜（AFM）和透射电子显微镜（TEM）进行了研究，以解释溶剂退火诱导的有序行为。最初，当共聚物溶解在甲苯中，甲苯是大多数聚苯乙烯（PS）嵌段的选择溶剂，并旋涂在 Si 衬底上时，形成了 S2VP 的凹陷型胶束结构。在薄膜被放置在溶剂退火室中并盖上盖子后，在氯仿的存在下，测量 S2VP 的表面形态作为退火时间的函数。在这项研究中，发现 S2VP 薄膜的形态在有序过程中重复了各种形态的产生和消失的循环。也就是说，S2VP 表现出不同形态之间的各种转变，包括高度无序状态、垂直于平面的圆柱和平行于平面的圆柱。这里观察到的每种形态都被用作合成金（Au）纳米粒子或纳米线的模板。Au 纳米物体的阵列用于调整表面等离子体共振。
