D.W. Wright, L. Deravi and J. Sumera
Vanderbilt University, US
diatoms, composites, ceramics
Biomineralization processes result in an expansive array of complexmaterials ranging from laminate composites and ceramics to single domainmagnetic materials. An exemplar of such systems are the single celldiatoms that form diverse nanopatterned silica structures. In contrastto many current materials approaches to the synthesis of patternedsilica, biogenic silica is formed rapidly under mild conditions mediatedby a self-assembly of highly post-translationally modified peptide. Inattempts to explore biomimetic approaches to metal oxide formation, wehave investigated the use of amine-terminated dendrimers asmonomolecular agents capable of mediating silica condensation. Toachieve the spatial design exemplified by nature, we present our recentresults on the development of a metal oxide forming dendrimer ink.Unfortunately, the optimal conditions for jettable inks arediametrically opposed to the physical properties of inks required forbiomimetic activity. Optimal conditions will be presented for theprinting of such inks with preservation of their chemical reactivity.Possible applications and versatility of these inks will also bediscussed. The printing of the functional ink results in the creation ofactive arrays capable of condensing silica in intricate biomimeticpatterns. Evidence for the functional activity of the printed arrays ispresented using silica specific dyes which only localize to the regionsin which ink has been deposited. Silica quantification experimentsdemonstrate a relationship between the printed area and thecorresponding amounts of condensed silica.
Nanotech 2008 Conference Program Abstract