Colorado State University Research Foundation

Lawrence Livermore National Security, LLC

Christopher J Ackerson

William Scott Compel

O Andrea Wong

James P Armstrong

Keith David Morrison

Ryan Riskowski

Kanda Borgognoni

Zachary Butz

On Lo A Wong

Richard Nemeth

Enzymes that reduce specific metal or metalloid ions to insoluble form are important to science. Peptides isolated from yeast- and phage-display libraries can affect the size and morphology of inorganic materials during their synthesis. Herein, an Se binding peptide was fused to an enzyme capable of reducing selenite (SeO) to a Senanoparticle (SeNP). The fusion of the Se binding peptide to the metalloid reductase provided size control of the resulting SeNP. The SeNP product also remains associated to the enzyme fusion. The Se binding peptide fusion to the enzyme increases the enzyme's SeOreductase activity. Modification of enzyme activity was absent, and the size control of particles was diminished when the Se binding peptide was added exogenously to the reaction mixture. Binding of the peptide is attributed to His based ligation that results in a conformational change to the peptide.

Metal-reducing enzymatic tag for optical and electron microscopy

A product includes a metallogel material having metal ions dispersed in an assembly having an organic compound. A method includes combining a metal salt, an organic compound precursor, and a glyme for forming a metallogel material having metal ions dispersed in an assembly having an organic compound.

Soluble metallogels including antimicrobial silver metallogels

The invention provides a metallopolymer coordination network comprising one or more coinage or similar metals and a glyme or glyme-equivalent. The composition has an amorphous polymer network that is significantly stronger than previously reported supramolecular hydrogels synthesized without glyme. Glyme chain length and water content strongly influence the mechanical, electronic, and optical behavior of the network.

Reversible metallopolymer network

The invention provides novel gold nanoclusters of the formula Au(SR)(weak ligand), wherein each R is independently an organic group, and the weak ligand is a weakly associating gold ligand of Formula I as described herein. The nanocluster can have an approximate molecular weight of 6 kDa. Corresponding dimers of the nanocluster can have an approximate molecular weight of 10 kDa (by SEC). The invention also provides methods of making and using the gold nanoclusters.

Ligand passivated gold nanoparticles

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Fort Collins, CO, United States of America

Christopher J Ackerson