Abstract/Details

Synthesis of inorganic nanowires by using peptide nanotubes as the templates via biologic recognition


2006 2006

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Abstract (summary)

Nanomaterials and nanoscale engineering will play a critical role in the future of materials science, electronic technology and biotechnology. Inspired by nature, biomineralization is becoming an important technique to synthesize inorganic nanomaterials. This is a recognization process which is based on molecular complementarity between protein and specific crystal phases of metals or semiconductors. This approach can produce nanomaterials with precisely controlled morphology and crystalline structure under mild conditions. In this dissertation, sequenced histidine-rich peptides are used to fabricate morphology-controlled nanocrystals on the surface. Various inorganic nanocrystals are produced accurately, efficiently and reproducibly by choosing different peptide sequences for different metals. Biomineralization of nanotubes is achieved by incorporating these sequenced histidine-rich peptides onto templated peptide nanotubes. The biological recognition of the specific peptide sequences toward particular metals and semiconductor leads to the efficient coatings of such inorganic nanocrystals as Ag, Pt, Cu, Ni and ZnS on the nanotubes. This method allows for the synthesis of nanotubes uniformly coated by highly crystalline metal nanocrystals with a high-density surface coverage. It has been demonstrated that the size, shape and packing density of the nanocrystals can be regulated via changes in the pH of the solution, which leads to conformational changes in the peptide. By this means, different inorganic nanowires can be synthesized with tunable surface morphology which results in tunable physical properties that could be used as the building blocks for the fabrication of nanodevices.

Indexing (details)


Subject
Chemistry
Classification
0494: Chemistry
Identifier / keyword
Pure sciences; Biologic recognition; Inorganic nanowires; Nanoparticles; Peptide nanotubes
Title
Synthesis of inorganic nanowires by using peptide nanotubes as the templates via biologic recognition
Author
Yu, Lingtao
Number of pages
131
Publication year
2006
Degree date
2006
School code
0046
Source
DAI-B 67/01, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780542510236, 0542510235
Advisor
Matsui, Hiroshi
University/institution
City University of New York
University location
United States -- New York
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3204990
ProQuest document ID
305356257
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/305356257
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