Creating new supramolecular materials by architecture of three-dimensional nanocrystal fiber networks

Xiang Yang Liu, Prashant D. Sawant, Wee Beng Tan, I. B.M. Noor, C. Pramesti, B. H. Chen

Research output: Contribution to journalArticlepeer-review

93 Citations (Scopus)

Abstract

The architecture of three-dimensional interconnecting self-organized nanofiber networks from separate needlelike crystals of L-DHL (lanosta-8,24-dien-3β-ol:24,25-dihydrolanosterol = 56:44) in diisooctylphthalate has been achieved for the first time, on the basis of the completely new concept of branching creation by additives (branching promoters). [In this work, an additive, ethylene/vinyl acetate copolymer (EVACP), is used at a concentration of several 10 ppm.] We demonstrate that this novel technique enables us to produce previously unknown self-supporting supramolecular functional materials with tailormade micro- or nanostructures, possessing significantly modified macroscopic properties, by utilizing materials thus far considered to be "useless". In addition, both the self-organized structure and the properties of the new materials can be fine-tuned by altering the processing conditions. Our results show that the formation of the interconnecting 3D self-organized network structure is controlled by a new mechanism, so-called crystallographic mismatch branching mechanism, as opposed to the conventionally adopted molecular self-assembly mechanism. The principles and criteria for the selection of branching promoters are also discussed from the point of view of molecular structures.

Original languageEnglish
Pages (from-to)15055-15063
Number of pages9
JournalJournal of the American Chemical Society
Volume124
Issue number50
DOIs
Publication statusPublished - 2002 Dec 18

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

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