Zou Shan, Hong Rui, Emrick Todd, Walker Gilbert C
Department of Chemistry and Institute for Optical Sciences, University of Toronto, 80 St. George Street, Toronto, Ontario M5S 3H6, Canada.
Langmuir. 2007 Feb 13;23(4):1612-4. doi: 10.1021/la0629274. Epub 2007 Jan 23.
Hierarchical, high-density, ordered patterns were fabricated on Si substrates by self-assembly of CdSe nanoparticles within approximately 20-nm-thick diblock copolymer films in a controlled manner. Surface-modified CdSe nanoparticles formed well-defined structures within microphase-separated polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) domains. Trioctylphosphine oxide (TOPO)-coated CdSe nanoparticles were incorporated into PS domains and polyethylene glycol-coated CdSe nanoparticles were located primarily in the P2VP domains. Nearly close-packed CdSe nanoparticles were clearly identified within the highly ordered patterns on Si substrates by scanning electron microscopy (SEM). Contact angle measurements together with SEM results indicate that TOPO-CdSe nanoparticles were partially placed at the air/copolymer interface.
通过在约20纳米厚的双嵌段共聚物薄膜中以可控方式自组装CdSe纳米颗粒，在硅衬底上制备了分层、高密度、有序的图案。表面改性的CdSe纳米颗粒在微相分离的聚苯乙烯-b-聚（2-乙烯基吡啶）（PS-b-P2VP）域内形成了明确的结构。三辛基氧化膦（TOPO）包覆的CdSe纳米颗粒被纳入PS域，而聚乙二醇包覆的CdSe纳米颗粒主要位于P2VP域。通过扫描电子显微镜（SEM）在硅衬底上的高度有序图案中清晰地识别出了几乎紧密堆积的CdSe纳米颗粒。接触角测量结果与SEM结果表明，TOPO-CdSe纳米颗粒部分位于空气/共聚物界面处。
