Electronic transport through short ds<scp>DNA</scp> measured with mechanically controlled break junctions: New thiol–gold binding protocol improves conductance

Liu, Shoupeng; Artois, Joris; Schmid, Daniel; Wieser, Matthias; Bornemann, Benjamin; Weisbrod, Samuel H.; Marx, Andreas; Scheer, Elke; Erbe, Artur

doi:10.1002/pssb.201349158

Cited by 10 publications

(9 citation statements)

References 25 publications

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“…Furthermore, the conductance appeared to be thermally activated. This resembled semiconductive behavior, which has been previously observed for single DNA molecules trapped in break junctions [49] and self-assembled monolayers of thiolfunctionalized DNA. The temperature-dependence of the conductance suggested hopping as charge transport mechanism along the DNA, as expected for DNA molecules, which are in contact with a substrate.…”

Section: (8 Of 12)supporting

confidence: 81%

Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Aftenieva

Bayrak

et al. 2021

Advanced Materials

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Advances in DNA nanotechnology allow the design and fabrication of highly complex DNA structures, uisng specific programmable interactions between smaller nucleic acid building blocks. To convey this concept to the fabrication of metallic nanoparticles, an assembly platform is developed based on a few basic DNA structures that can serve as molds. Programming specific interactions between these elements allows the assembly of mold superstructures with a range of different geometries. Subsequent seeded growth of gold within the mold cavities enables the synthesis of complex metal structures including tightly DNA‐caged particles, rolling‐pin‐ and dumbbell‐shaped particles, as well as T‐shaped and loop particles with high continuity. The method further supports the formation of higher‐order assemblies of the obtained metal geometries. Based on electrical and optical characterizations, it is expected that the developed platform is a valuable tool for a self‐assembly‐based fabrication of nanoelectronic and nanooptic devices.

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Section: (8 Of 12)supporting

confidence: 81%

Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Aftenieva

Bayrak

et al. 2021

Advanced Materials

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“…Finally, DNA molecules with a length of

were observed to act as insulators, but below this length conductance could be observed that can be related to the base stacking of the ds-DNA. It has been demonstrated that stacks of CG-pairs act as relatively well conducting links along the DNA, while AT-pairs rather resemble tunneling barriers [ 31 , 32 ]. It is, however, challenging to generate stable conformations of DNA assemblies, which are exceeding the length of a few nanometers, with stacks of GC-pairs, only.…”

Section: Dna Metalizationmentioning

confidence: 99%

Review of the Electrical Characterization of Metallic Nanowires on DNA Templates

Bayrak

Jagtap

Erbe

2018

IJMS

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The use of self-assembly techniques may open new possibilities in scaling down electronic circuits to their ultimate limits. Deoxyribonucleic acid (DNA) nanotechnology has already demonstrated that it can provide valuable tools for the creation of nanostructures of arbitrary shape, therefore presenting an ideal platform for the development of nanoelectronic circuits. So far, however, the electronic properties of DNA nanostructures are mostly insulating, thus limiting the use of the nanostructures in electronic circuits. Therefore, methods have been investigated that use the DNA nanostructures as templates for the deposition of electrically conducting materials along the DNA strands. The most simple such structure is given by metallic nanowires formed by deposition of metals along the DNA nanostructures. Here, we review the fabrication and the characterization of the electronic properties of nanowires, which were created using these methods.

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“…In the first, proximate electrodes are fabricated and the molecules are located in the gap between them, and measured by a two‐probe transport setup . In the second, a gap is formed by mechanically controllable break‐junction technique or by current heating . In the third approach, one end of the molecule is chemically linked to a metallic substrate, while the other end is attached to a conductive local‐probe tip of either a scanning tunneling microscope (STM) or an atomic force microscope (AFM), allowing two‐probe transport measurements …”

Section: Introductionmentioning

confidence: 99%

Probing Molecular‐Transport Properties using the Superconducting Proximity Effect

et al. 2017

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Molecular electronics research focuses on the study and application of molecular building blocks for the fabrication of nanoscale electronic devices, and on utilizing their self‐organization properties to achieve large‐scale electronic circuits. One of the key issues in molecular electronics is to identify the mechanism governing the electrical conductivity along the molecules. More specifically, the problem is to determine whether the junction behaves as a tunnel barrier, or the junction provides electron or hole conduction channels through the molecule. Due to the large energy gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), it is usually assumed in calculations that the molecule may contain only one conducting channel either for electrons or for holes. Experimentally, measurements using a local‐probe tip or a small gap between two metallic leads strongly depend on the nature of the linkage between the molecules and the contacts, which is hard to optimize. Here, a new approach is presented to study the electronic and transport properties of molecules using the superconducting proximity effect. Insight into these properties is gained by monitoring the modifications of the superconducting properties upon linking nanoparticles to a superconductor via the studied molecules.

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Electronic transport through short dsDNA measured with mechanically controlled break junctions: New thiol–gold binding protocol improves conductance

Cited by 10 publications

References 25 publications

Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Complex Metal Nanostructures with Programmable Shapes from Simple DNA Building Blocks

Review of the Electrical Characterization of Metallic Nanowires on DNA Templates

Probing Molecular‐Transport Properties using the Superconducting Proximity Effect

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