Fabrication of submicron pores with an outer shell using modified poly(vinyl alcohol) and the molecular or particle collection effect
Fabrication of submicron pores with an outer shell using modified poly(vinyl alcohol) and the molecular or particle collection effect
复制标题
使用改性聚乙烯醇制备带外壳的亚微米孔及其分子或颗粒收集效应
DOI：
10.1021/la4022068
复制
发表时间：
2013
期刊：
影响因子：
3.9
通讯作者：
and Takashi Fukuda
中科院分区：
文献类型：
--
作者：
Akira Emoto *;Naomi Noguchi ;Tomoko Kobayashi ;and Takashi Fukuda
用改性的聚乙烯醇(PVA)在亚微米尺度上制备了具有外壳的孔(POS)。将水溶液与阳离子PVA和直径亚微米的聚苯乙烯(PS)小球的水基胶体悬浮液混合。然后将混合物旋涂在基材上。将生成的结构浸入甲苯中，使PS球溶解。结果，PVA在衬底上形成了POS膜。使用直径为500 nm的PS球，孔的直径约为300 nm，并被外壳包围。这种结构表现出有益的分子和粒子收集效应，这归因于外围外壳从表面升起。此外，POS可以使用通常用于酶固定水凝胶基质的光交联型PVA来形成。
Pores with an outer shell (POS) are fabricated on the submicrometer scale using modified poly(vinyl alcohol) (PVA). An aqueous solution is mixed with cationic PVA and a water-based colloidal suspension of polystyrene (PS) spheres of submicrometer diameter. The mixture is then spin-coated onto a substrate. The resultant structure is immersed in toluene, which dissolves the PS spheres. As a result, POS are formed by PVA on the substrate. By using PS spheres with 500 nm diameter, the pore openings have a diameter of about 300 nm and are surrounded by the outer shell. This structure exhibits beneficial molecular and particle collection effects, which are attributed to the peripheral shell rising from the surface. In addition, POS can be formed using a photo-cross-linkable PVA that is often used for enzyme-immobilized hydrogel matrices.