Bactericidal activity of black silicon
Elena P. Ivanova,Jafar Hasan,Hayden K. Webb,Gediminas Gervinskas,Gediminas Gervinskas,Saulius Juodkazis,Saulius Juodkazis,Vi Khanh Truong,Alex H. F. Wu,Robert N. Lamb,Vladimir A. Baulin,Gregory S. Watson,Jolanta A. Watson,David E. Mainwaring,Russell J. Crawford +14 more
Reads0
Chats0
TLDR
It is shown that the nanoprotrusions on the surfaces of both black silicon and D. bipunctata wings form hierarchical structures through the formation of clusters of adjacent nanoproTrusions, which generate a mechanical bactericidal effect, independent of chemical composition.Abstract:
Black silicon is a synthetic nanomaterial that contains high aspect ratio nanoprotrusions on its surface, produced through a simple reactive-ion etching technique for use in photovoltaic applications Surfaces with high aspect-ratio nanofeatures are also common in the natural world, for example, the wings of the dragonfly Diplacodes bipunctata Here we show that the nanoprotrusions on the surfaces of both black silicon and D bipunctata wings form hierarchical structures through the formation of clusters of adjacent nanoprotrusions These structures generate a mechanical bactericidal effect, independent of chemical composition Both surfaces are highly bactericidal against all tested Gram-negative and Gram-positive bacteria, and endospores, and exhibit estimated average killing rates of up to ∼450,000 cells min -1 cm -2 This represents the first reported physical bactericidal activity of black silicon or indeed for any hydrophilic surface This biomimetic analogue represents an excellent prospect for the development of a new generation of mechano-responsive, antibacterial nanomaterialsread more
Citations
More filters
Journal ArticleDOI
Black silicon solar cells with interdigitated back-contacts achieve 22.1% efficiency
Hele Savin,Päivikki Repo,Guillaume von Gastrow,Pablo Ortega,Eric Calle,M. Garín,Ramon Alcubilla +6 more
TL;DR: It is demonstrated that efficiencies above 22% can be reached, even in thick interdigitated back-contacted cells, where carrier transport is very sensitive to front surface passivation, meaning that the surface recombination issue has truly been solved and black silicon solar cells have real potential for industrial production.
Journal ArticleDOI
Black silicon: fabrication methods, properties and solar energy applications
Xiaogang Liu,Xiaogang Liu,Paul R. Coxon,Marius Peters,Bram Hoex,Jacqueline M. Cole,Jacqueline M. Cole,Derek J. Fray +7 more
TL;DR: In this article, the use of black silicon (BSi) as an anti-reflection coating in solar cells is examined and appraised, based upon strategies towards higher efficiency renewable solar energy modules.
Journal ArticleDOI
Antibiotic-Free Antibacterial Strategies Enabled by Nanomaterials: Progress and Perspectives.
TL;DR: Antibiotic‐free antibacterial strategies enabled by advanced nanomaterials are presented and practical antibacterial applications employing these antibiotic‐free strategies are introduced.
Journal ArticleDOI
Natural and bioinspired nanostructured bactericidal surfaces
TL;DR: A brief overview of the bactericidal behaviour of naturally occurring and bio-inspired nanostructured surfaces against different bacteria through the physico-mechanical rupture of the cell wall is presented.
Journal ArticleDOI
The role of nanotechnology in tackling global water challenges
Meagan S. Mauter,Ines Zucker,François Perreault,Jay R. Werber,Jae-Hong Kim,Menachem Elimelech +5 more
TL;DR: In this article, the potential applications of nanomaterials in advancing sustainable water treatment systems and their associated barriers are assessed and future areas of research necessary to realize safe deployment of promising Nanomaterial applications are also identified.
References
More filters
Journal ArticleDOI
Light Trapping in Silicon Nanowire Solar Cells
Erik C. Garnett,Peidong Yang +1 more
TL;DR: It is demonstrated that ordered arrays of silicon nanowires increase the path length of incident solar radiation by up to a factor of 73, which is above the randomized scattering (Lambertian) limit and is superior to other light-trapping methods.
Journal ArticleDOI
Superhydrophobic surfaces: From natural to biomimetic to functional
TL;DR: This feature article highlights some of the recent advances in the last four years, including the various smart routes to construct rough surfaces, and a lot of chemical modifications which lead to superhydrophobicity.
Journal ArticleDOI
An 18.2%-efficient black-silicon solar cell achieved through control of carrier recombination in nanostructures
TL;DR: By identifying the regimes of junction doping concentration in which each mechanism dominates, this work was able to design and fabricate an independently confirmed 18.2%-efficient nanostructured 'black-silicon' cell that does not need the antireflection coating layer normally required to reach a comparable performance level.
Journal ArticleDOI
Bacillus cereus and its food poisoning toxins
Per Einar Granum,Terje Lund +1 more
TL;DR: Bacillus cereus is becoming one of the more important causes of food poisoning in the industrialised world and produces one emetic toxin and three different enterotoxins, which consist of three different proteins that act together.
Journal ArticleDOI
Natural Bactericidal Surfaces: Mechanical Rupture of Pseudomonas aeruginosa Cells by Cicada Wings
Elena P. Ivanova,Jafar Hasan,Hayden K. Webb,Vi Khanh Truong,Gregory S. Watson,Jolanta A. Watson,Vladimir A. Baulin,Sergey Pogodin,James Wang,Mark J. Tobin,Christian Löbbe,Russell J. Crawford +11 more
TL;DR: Natural superhydrophobic surfaces are often thought to have antibiofouling potential, but when incubated on cicada wings, Pseudomonas aeruginosa cells are not repelled; instead they are penetrated by the nanopillar arrays present on the wing surface, resulting in bacterial cell death.