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Selection of Biomolecules Capable of Mediating the Formation of Nanocrystals

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Daniel L. Feldheim* and Bruce E. Eaton*

Department of Chemistry and Biochemistry, University of Colorado, Boulder, Colorado 80309

ACS Nano, 2007, 1 (3), pp 154–159

DOI: 10.1021/nn7002019

Publication Date (Web): October 16, 2007

* Address correspondence to Daniel.Feldheim@colorado.edu, Bruce.Eaton@colorado.edu.

Section:

Biochemical Methods

Abstract

Biopolymers in the biosphere are well known to mediate the formation of a wide array of inorganic materials, such as bone, shells, lenses, and magnetic particles to name a few. Recently, in vitro experiments with biopolymers such as peptides, RNA, and DNA have shown that templating by these macromolecules can yield a variety of materials under mild reaction conditions. The primary sequence of the biopolymer can be viewed as a proteomic or genomic signature for the templating of an inorganic material from defined metal precursors and reaction conditions. Together with the rapid advances in inorganic particle synthesis by other combinatorial methods, these bioinspired in vitro materials experiments may provide additional insights into possible inorganic materials yet to be discovered and subsequently synthesized by conventional methods. Some of the concepts important to understanding the crystallization phenomena occurring during biopolymer mediation are discussed. A simple kinetic model is provided in the context of known biopolymer-mediated inorganic crystallizations.

Keywords:

nanocrystal; nanoparticle; SELEX; phage display; biomineralization; RNA; DNA; crystallization; mediation

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