@article {3064,
	title = {Solvent-Induced Assembly of Microbial Protein Nanowires into Superstructured Bundles.},
	journal = {Biomacromolecules},
	volume = {22},
	year = {2021},
	month = {2021 Mar 08},
	pages = {1305-1311},
	abstract = {<p>Protein-based electronic biomaterials represent an attractive alternative to traditional metallic and semiconductor materials due to their environmentally benign production and purification. However, major challenges hindering further development of these materials include (1) limitations associated with processing proteins in organic solvents and (2) difficulties in forming higher-order structures or scaffolds with multilength scale control. This paper addresses both challenges, resulting in the formation of one-dimensional bundles composed of electrically conductive protein nanowires harvested from the microbes  and . Processing these bionanowires from common organic solvents, such as hexane, cyclohexane, and DMF, enabled the production of multilength scale structures composed of distinctly visible pili. Transmission electron microscopy revealed striking images of bundled protein nanowires up to 10 μm in length and with widths ranging from 50-500 nm (representing assembly of tens to hundreds of nanowires). Conductive atomic force microscopy confirmed the presence of an appreciable nanowire conductivity in their bundled state. These results greatly expand the possibilities for fabricating a diverse array of protein nanowire-based electronic device architectures.</p>},
	keywords = {Electric Conductivity, Electron Transport, Geobacter, Nanowires, Solvents},
	issn = {1526-4602},
	doi = {10.1021/acs.biomac.0c01790},
	author = {Sun, Yun-Lu and Montz, Brian J and Selhorst, Ryan and Tang, Hai-Yan and Zhu, Jiaxin and Nevin, Kelly P and Woodard, Trevor L and Ribbe, Alexander E and Russell, Thomas P and Nonnenmann, Stephen S and Lovley, Derek R and Emrick, Todd}
}
@article {3081,
	title = {Conductive Composite Materials Fabricated from Microbially Produced Protein Nanowires.},
	journal = {Small},
	volume = {14},
	year = {2018},
	month = {2018 Nov},
	pages = {e1802624},
	abstract = {<p>Protein-based electronic materials have numerous potential advantages with respect to sustainability and biocompatibility over electronic materials that are synthesized using harsh chemical processes and/or which contain toxic components. The microorganism Geobacter sulfurreducens synthesizes electrically conductive protein nanowires (e-PNs) with high aspect ratios (3 nm {\texttimes} 10-30 {\textmu}m) from renewable organic feedstocks. Here, the integration of G. Sulfurreducens e-PNs into poly(vinyl alcohol) (PVA) as a host polymer matrix is described. The resultant e-PN/PVA composites exhibit conductivities comparable to PVA-based composites containing synthetic nanowires. The relationship between e-PN density and conductivity of the resultant composites is consistent with percolation theory. These e-PNs confer conductivity to the composites even under extreme conditions, with the highest conductivities achieved from materials prepared at pH 1.5 and temperatures greater than 100 {\textdegree}C. These results demonstrate that e-PNs represent viable and sustainable nanowire compositions for the fabrication of electrically conductive composite materials.</p>},
	keywords = {Geobacter, Nanocomposites, Nanowires, Polymers},
	issn = {1613-6829},
	doi = {10.1002/smll.201802624},
	author = {Sun, Yun-Lu and Tang, Hai-Yan and Ribbe, Alexander and Duzhko, Volodimyr and Woodard, Trevor L and Ward, Joy E and Bai, Ying and Nevin, Kelly P and Nonnenmann, Stephen S and Russell, Thomas and Emrick, Todd and Lovley, Derek R}
}
