D
David J. F. Walker
Researcher at University of Massachusetts Amherst
Publications - 38
Citations - 1538
David J. F. Walker is an academic researcher from University of Massachusetts Amherst. The author has contributed to research in topics: Geobacter sulfurreducens & Geobacter. The author has an hindex of 15, co-authored 37 publications receiving 1022 citations. Previous affiliations of David J. F. Walker include University of Nottingham & University of Texas at Austin.
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Journal ArticleDOI
Metatranscriptomic Evidence for Direct Interspecies Electron Transfer Between Geobacter and Methanothrix Species in Methanogenic Rice Paddy Soils
Dawn E. Holmes,Dawn E. Holmes,Pravin Malla Shrestha,Pravin Malla Shrestha,David J. F. Walker,Yan Dang,Kelly P. Nevin,Trevor L. Woodard,Derek R. Lovley +8 more
TL;DR: The results suggest that the reason that Geobacter species are repeatedly found to be among the most metabolically active microorganisms in methanogenic soils is that they grow syntrophically in cooperation with Methanothrix spp.
Journal ArticleDOI
Geobacter Protein Nanowires.
TL;DR: Both e-pili and OmcS filaments offer design options for the synthesis of protein-based “green” electronics, which may be the primary driving force for the study of these structures in the near future.
Journal ArticleDOI
Electrically conductive pili from pilin genes of phylogenetically diverse microorganisms.
David J. F. Walker,Ramesh Y. Adhikari,Dawn E. Holmes,Dawn E. Holmes,Joy E. Ward,Trevor L. Woodard,Kelly P. Nevin,Derek R. Lovley +7 more
TL;DR: A simple method to screen pilin genes from difficult-to-culture microorganisms for their potential to yield e-pili is demonstrated; new sources for biologically based electronic materials are revealed; and it is suggested that a wide phylogenetic diversity of microorganisms may use e- pili for extracellular electron exchange.
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Bioinspired bio-voltage memristors
Tianda Fu,Xiaomeng Liu,Hongyan Gao,Joy E. Ward,Xiaorong Liu,Bing Yin,Zhongrui Wang,Ye Zhuo,David J. F. Walker,Jianhua Yang,Jianhan Chen,Derek R. Lovley,Jun Yao +12 more
TL;DR: A type of diffusive memristor, fabricated from the protein nanowires harvested from the bacterium Geobacter sulfurreducens, is demonstrated that functions at the biological voltages of 40-100 mV, and the potential of using the Memristor to directly process biosensing signals is demonstrated.
Journal ArticleDOI
The electrically conductive pili of Geobacter species are a recently evolved feature for extracellular electron transfer.
TL;DR: Insight is provided into where and when e-pili are likely to contribute to extracellular electron transport processes that are biogeochemically important and involved in bioenergy conversions.