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Title: Creating new supramolecular materials by architecture of three-dimensional nanocrystal fiber networks
Authors: Liu, X.Y. 
Sawant, P.D. 
Tan, W.B. 
Noor, I.B.M.
Pramesti, C.
Chen, B.H. 
Issue Date: 18-Dec-2002
Citation: Liu, X.Y., Sawant, P.D., Tan, W.B., Noor, I.B.M., Pramesti, C., Chen, B.H. (2002-12-18). Creating new supramolecular materials by architecture of three-dimensional nanocrystal fiber networks. Journal of the American Chemical Society 124 (50) : 15055-15063. ScholarBank@NUS Repository.
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.
Source Title: Journal of the American Chemical Society
ISSN: 00027863
DOI: 10.1021/ja0206137
Appears in Collections:Staff Publications

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