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Title: Direct Writing of Tunable Living Inks for Bioprocess Intensification

Journal Article · · Nano Letters

Critical to the success of three-dimensional (3D) printing of living materials with high performance is the development of new ink materials and 3D geometries that favor long-term cell functionality. Here we report the use of freeze-dried live cells as the solid filler to enable a new living material system for direct ink writing of catalytically active microorganisms with tunable densities and various self-supporting porous 3D geometries. Baker’s yeast was used as an exemplary live whole-cell biocatalyst, and the printed structures displayed high resolution, large scale, high catalytic activity and long-term viability. An unprecedented high cell loading was achieved, and cell inks showed unique thixotropic behavior. In the presence of glucose, printed bioscaffolds exhibited increased ethanol production compared to bulk counterparts due largely to improved mass transfer through engineered porous structures. The new living materials developed in this work could serve as a versatile platform for process intensification of an array of bioconversion processes utilizing diverse microbial biocatalysts for production of high-value products or bioremediation applications.

Research Organization:
National Renewable Energy Lab. (NREL), Golden, CO (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC36-08GO28308; AC52-07NA27344
OSTI ID:
1495251
Alternate ID(s):
OSTI ID: 1500077; OSTI ID: 1508842; OSTI ID: 1592032
Report Number(s):
NREL/JA-5100-73418; LLNL-JRNL-753559
Journal Information:
Nano Letters, Journal Name: Nano Letters Vol. 19 Journal Issue: 9; ISSN 1530-6984
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 52 works
Citation information provided by
Web of Science

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Figures / Tables (5)