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Phone: +49 351 260 3121
E-mail: nanonet@hzdr.de

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Phone: +49 351 260 2366
E-mail: a.erbe@hzdr.de

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Phone: +49 351 463 31414
E-mail: g.cuniberti@tu-dresden.de

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News

Temperature-Dependent Charge Transport through Individually Contacted DNA Origami-Based Au Nanowires,
Langmuir 32, 10159–10165 (2016)
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2016-08-30/09-02
NanoNet International Workshop, Prague, CZ: Best Poster Prize to Jingjing Ye

Compact Nanowire Sensors probe Microdroplets,
Nano Lett. 16, 4991–5000 (2016)

Events

2016-12-07/10
Research Skill Development Course (Y1), Buchenau, DE

2016-12-08/09
Defect engineering in SiC, HZDR, Dresden

2016-12-13
PhD Defense Bezu Teschome, 15:30, TU Dresden, WIL C133 (public event)

2017-03-19/24
DPG Meeting Dresden, TU Dresden

2017-04-18/20
Many paths to interference: ..., MPI-PKS Dresden

2017-04-19/21
Research Skill Development Course (Y3), Bonn, DE

2017-07-31/08-04
EP2DS22-MSS18 Intern. Conference, Pennsylvania State College, PA, USA

2017-08-16/18
Nanonet Annual Workshop, Neuklingenberg (near Dresden)

2017-08-29/09-02
14th European Molecular Electronics Conference, Dresden

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Acknowledgment

The IHRS NanoNet is funded by the Initiative and Networking Fund of the Helmholtz Association (VH-KO-606).

Topography-controlled alignment of DNA origami nanotubes on nanopatterned surfaces

Bezuayehu Teshome, Stefan Facsko, Adrian Keller

The controlled positioning of DNA nanostructures on technologically relevant surfaces represents a major goal along the route toward the full-scale integration of DNA-based materials into nanoelectronic and sensor devices. Previous attempts to arrange DNA nanostructures into defined arrays mostly relied on top-down lithographic patterning techniques combined with chemical surface functionalization. Here we combine two bottom-up techniques for nanostructure fabrication, i.e., self-organized nanopattern formation and DNA origami self-assembly, in order to demonstrate the electrostatic self-alignment of DNA nanotubes on topographically patterned silicon surfaces. Self-organized nanoscale ripple patterns with periodicities ranging from 20 nm to 50 nm are fabricated by low-energy ion irradiation and serve as substrates for DNA origami adsorption. Electrostatic interactions with the charged surface oxide during adsorption direct the DNA origami nanotubes to the ripple valleys and align them parallel to the ripples. By optimizing the pattern dimensions and the Debye length of the adsorption buffer, we obtain an alignment yield of [similar]70%. Since this novel and versatile approach does not rely on any chemical functionalization of the surface or the DNA nanotubes, it can be applied to virtually any substrate material and any top-down or bottom-up nanopatterning technique. This technique thus may enable the wafer-scale fabrication of ordered arrays of functional DNA-based nanowires.

NANONET PUBLICATION Abstract Nanoscale 2014

Publication: Nanoscale 2014, 6 (3), 1790-1796

DOI: http://dx.doi.org/10.1039/C3NR04627C

Press Release: Ausgerichtete DNA-Drähte für die Nanoelektronik (in German)