引言 自从双分子(双层)厚度的、能分隔开两个水溶液的超薄类脂膜问世二十多年来,人们对它的兴趣与日俱增。这种薄类脂膜具有两个界面,其厚度小于10nm,在可见光下,这种膜看起来是“黑”的。这是因为从膜的前界面反射的光产生半波长的相位移,与从膜后 INTRODUCTION Interest has been increasing for more than two decades since the advent of bimolecular (two-layer) ultrathin films that separate two aqueous solutions. This thin lipid membrane has two interfaces with a thickness of less than 10 nm, which looks “black” under visible light. This is because the light reflected from the front interface of the membrane produces a phase shift of half-wave length from that behind the membrane