Department of Applied Chemistry, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan.
Langmuir. 2012 Dec 18;28(50):17524-9. doi: 10.1021/la3042023. Epub 2012 Dec 7.
We report facile preparation of nanoporous thin films by rinsing out a metal salt from nanophase-separated hybrid films composed of a block copolymer and a water-soluble metal salt. Nanophase-separated hybrids were prepared by mixing polystyrene-b-poly(4-vinylpyridine) (PS-P4VP) and iron(III) chloride in a solvent of pyridine, followed by solvent-casting and thermal-annealing. Film samples with a thickness of ca. 100 nm were fabricated from the nanophase-separated hybrids by using a microtoming technique. Metal salts in the films were removed by immersion into water to fabricate nanopores. Morphological observations were conducted by using transmission electron microscopy (TEM). Ordered cylindrical nanopores were clearly observed in the thin films prepared from the water-immersed hybrids which originally present cylindrical nanodomains. These nanoporous films were modified by loading another metal salt, samarium(III) nitrate, into the nanopores on the basis of the coordination ability of P4VP tethered to the pore walls. The samples after loading treatment were evaluated by TEM observation and elemental analysis with energy dispersive X-ray spectroscopy.
我们报告了通过从由嵌段共聚物和水溶性金属盐组成的纳米相分离杂化膜中冲洗出金属盐来制备纳米多孔薄膜的简便方法。通过在吡啶溶剂中混合聚苯乙烯-b-聚（4-乙烯基吡啶）（PS-P4VP）和三氯化铁，然后进行溶剂浇铸和热退火，制备了纳米相分离的杂化物。通过使用微切割技术，从纳米相分离的杂化物中制备了厚度约为 100nm 的薄膜样品。通过将薄膜浸入水中来去除金属盐，以制备纳米孔。通过透射电子显微镜（TEM）进行了形态观察。在从最初呈现圆柱形纳米区的水浸杂化物制备的薄膜中，可以清楚地观察到有序的圆柱形纳米孔。这些纳米多孔薄膜通过基于连接到孔壁的 P4VP 的配位能力将另一种金属盐，硝酸钐（III）加载到纳米孔中来进行修饰。通过 TEM 观察和能量色散 X 射线光谱的元素分析对负载处理后的样品进行了评估。
