The present invention provides high density, non-volatile memory devices incorporating winged trimers of porphyrinic macrocycles. In preferred embodiments, the two wing porphyrinic macrocycles are the same, and both are different from the center macrocycle. Such molecules are relatively easy to synthesize,...http://www.google.com.tw/patents/US6272038?utm_source=gb-gplus-share專利 US6272038 - High-density non-volatile memory devices incorporating thiol-derivatized porphyrin trimers
