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Title: Tuning antimicrobial properties of biomimetic nanopatterned surfaces

Journal Article · · Nanoscale
DOI:https://doi.org/10.1039/c8nr00439k· OSTI ID:1460974

Here, nature has amassed an impressive array of structures that afford protection from microbial colonization/infection when displayed on the exterior surfaces of organisms. Here, controlled variation of the features of mimetics derived from etched silicon allows for tuning of their antimicrobial efficacy. Materials with nanopillars up to 7 μm in length are extremely effective against a wide range of microbial species and exceed the performance of natural surfaces; in contrast, materials with shorter/blunter nanopillars (<2 μm) selectively killed specific species. Using a combination of microscopies, the mechanisms by which bacteria are killed are demonstrated, emphasizing the dependence upon pillar density and tip geometry. Additionally, real-time imaging reveals how cells are immobilized and killed rapidly. Generic or selective protection from microbial colonization could be conferred to surfaces [for, e.g., internal medicine, implants (joint, dental, and cosmetic), food preparation, and the agricultural industry] patterned with these materials as coatings.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1460974
Alternate ID(s):
OSTI ID: 1434121
Journal Information:
Nanoscale, Vol. 10, Issue 14; ISSN 2040-3364
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 77 works
Citation information provided by
Web of Science

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Cited By (5)

High‐Aspect‐Ratio Nanostructured Surfaces as Biological Metamaterials journal January 2020
Biomimetic antimicrobial material strategies for combating antibiotic resistant bacteria journal January 2020
Adhesion and bactericidal properties of nanostructured surfaces dependent on bacterial motility journal January 2020
Ultrafast physical bacterial inactivation and photocatalytic self-cleaning of ZnO nanoarrays for rapid and sustainable bactericidal applications journal October 2020
Effects of Nanopillar Size and Spacing on Mechanical Perturbation and Bactericidal Killing Efficiency journal September 2021

Figures / Tables (9)