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Cellular interfaces with hydrogen-bonded organic semiconductor hierarchical nanocrystals
Friedrich Alexander University of Erlangen Nurnberg, Germany; Energie Campus Nurnberg EnCN, Germany.
Linköping University, Department of Science and Technology, Physics and Electronics. Linköping University, Faculty of Science & Engineering. Johannes Kepler University of Linz, Austria.
Johannes Kepler University of Linz, Austria.
Friedrich Alexander University of Erlangen Nurnberg, Germany; Energie Campus Nurnberg EnCN, Germany.
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2017 (English)In: Nature Communications, ISSN 2041-1723, E-ISSN 2041-1723, Vol. 8, 91Article in journal (Refereed) Published
Abstract [en]

Successful formation of electronic interfaces between living cells and semiconductors hinges on being able to obtain an extremely close and high surface-area contact, which preserves both cell viability and semiconductor performance. To accomplish this, we introduce organic semiconductor assemblies consisting of a hierarchical arrangement of nanocrystals. These are synthesised via a colloidal chemical route that transforms the nontoxic commercial pigment quinacridone into various biomimetic three-dimensional arrangements of nanocrystals. Through a tuning of parameters such as precursor concentration, ligands and additives, we obtain complex size and shape control at room temperature. We elaborate hedgehog-shaped crystals comprising nanoscale needles or daggers that form intimate interfaces with the cell membrane, minimising the cleft with single cells without apparent detriment to viability. Excitation of such interfaces with light leads to effective cellular photostimulation. We find reversible light-induced conductance changes in ion-selective or temperature-gated channels.

Place, publisher, year, edition, pages
NATURE PUBLISHING GROUP , 2017. Vol. 8, 91
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Condensed Matter Physics
Identifiers
URN: urn:nbn:se:liu:diva-139551DOI: 10.1038/s41467-017-00135-0ISI: 000406013600002PubMedID: 28733618OAI: oai:DiVA.org:liu-139551DiVA: diva2:1130131
Note

Funding Agencies|Austrian Science Fund FWF [TRP 294-N19, FWF P28167-N34]; Wittgenstein Prize; FWF [P26067, P28701]; Knut and Alice Wallenberg Foundation; European Union through the EFRE INTERREG IV ETC-AT-CZ [M00146]; Aufbruch Bayern initiative of the state of Bavaria; Czech Ministry of Education, Youth and Sports within the project Czech-BioImaging [LM2015062]; Biological Chemistry cross-border Linz-Ceske Budejovice study program

Available from: 2017-08-08 Created: 2017-08-08 Last updated: 2017-11-29

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