Thin films with densely, regularly packed nanochannels: Preparation, characterization, and applications
Thin films with densely, regularly packed nanochannels: Preparation, characterization, and applications
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DOI：
10.1021/cm990184k
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发表时间：
1999-08-01
影响因子：
8.6
通讯作者：
Nigam, S
中科院分区：
文献类型：
--
作者：
Liu, GJ;Ding, JF;Nigam, S
合成并表征了聚（丙烯酸叔丁酯）-嵌段聚（2-肉桂酰基乙基甲基丙烯酸酯）PtBA-b-PCEMA 样品。在 105 +/- 2 摄氏度退火后，PtBA 块在 PCEMA 基质内形成致密的圆柱体。通过切片获得二嵌段薄膜。 PCEMA 光交联后，PtBA 的叔丁基被水解，在松散堆积的纳米尺寸圆柱体中留下聚丙烯酸链。水穿过这些薄膜的渗透性会变化几个数量级，具体取决于水介质的 pH 值或其中的阳离子类型。通过用 CdS 或 Fe2O3 纳米颗粒填充纳米通道，测试了使用此类纳米通道作为模板制造进一步纳米结构的可能性。
A poly(tert-butyl acrylate)-block-poly(2-cinnamoylethyl methacrylate), PtBA-b-PCEMA, sample was synthesized and characterized. After annealing at 105 +/- 2 degrees C, the PtBA block formed densely packed cylinders inside the PCEMA matrix. Thin films of the diblock were obtained by microtomy. After PCEMA photo-cross-linking the tert-butyl groups of PtBA were hydrolyzed, leaving poly(acrylic acid) chains in the loosely packed nanometer-sized cylinders. The permeability of water across such films varied by several orders of magnitude, depending on the pH of the aqueous medium or the types of cations in it. The possibility of using such nanochannels as templates for making further nanostructures was tested by filling the nanochannels with CdS or Fe2O3 nanoparticles.