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兰米尔-布洛杰特(Langmuir-Blodgett,LB)膜系指在水溶液表面或固体表面定向排列的致密单层或多层分子膜。其制备方法通常是将两亲化合物等溶于挥发性溶剂中,均匀喷洒于水溶液表面,待溶剂完全挥发,即在水-空气界面上得到一层垂直排列的致密分子膜;也可用特殊装置将水表面的单层分子膜分次沉积到固体表面,形成多层分子膜。一般而言,适用于制备LB膜的化合物有三类:1.两亲化合物,分子两端分别为亲水基和憎水基,如脂肪酸;2.脂肪环类化合物,如卟啉、酞菁、环糊精;3.聚合物,如聚冠醚等。 LB膜极薄(单分子层厚度<5nm),分子定向排列,因而适合用作化学传感器的敏感材料,应用前景很大,深受分析学家重视。本文将阐述
Langmuir-Blodgett (LB) film refers to a dense monolayer or multilayer molecular film oriented in aqueous solution or on a solid surface. The preparation method is usually amphiphilic compounds such as dissolved in volatile solvents, evenly sprayed on the surface of the aqueous solution until the solvent is completely volatile, that is, in the water - air interface to get a vertical arrangement of dense molecular film; can also be used special device A single layer of water on the surface of the molecular film deposited on the solid surface, forming a multilayer molecular film. In general, there are three types of compounds suitable for preparing LB films: 1. amphiphilic compounds having hydrophilic and hydrophobic groups at both ends, respectively, such as fatty acids; 2. alicyclic compounds such as porphyrins, phthalocyanines, Cyclodextrin; 3. Polymers, such as poly crown ether. LB thin film (monolayer thickness <5nm), molecular orientation, and therefore suitable for use as a chemical sensor sensitive material, the application of great prospects, by analysts attention. This article will explain