Formation of atomic point contacts and molecular junctions with a combined mechanical break junction and electrodeposition method

2006 ◽  
Vol 1 (2) ◽  
pp. 83 ◽  
Author(s):  
X.L. Li ◽  
S.Z. Hua ◽  
H.D. Chopra ◽  
N.J. Tao
Keyword(s):  
Molecular Junctions ◽  
Break Junction ◽  
Point Contacts ◽  
Electrodeposition Method ◽  
Atomic Point Contacts

scholarly journals A flexible platform for controlled optical and electrical effects in tailored plasmonic break junctions

Nanophotonics ◽  
2020 ◽  
Vol 9 (6) ◽  
pp. 1391-1400
Author(s):  
Florian Laible ◽  
Kai Braun ◽  
Otto Hauler ◽  
Martin Eberle ◽  
Dieter P. Kern ◽  
...  
Keyword(s):  
Electrical Characterization ◽  
Tunneling Current ◽  
Plasmonic Nanostructures ◽  
Break Junction ◽  
Metal Contacts ◽  
Break Junctions ◽  
Constant Bias ◽  
Confocal Scanning ◽  
Atomic Point Contacts

AbstractMechanically controllable break junctions are one suitable approach to generate atomic point contacts and ultrasmall and controllable gaps between two metal contacts. For constant bias voltages, the tunneling current can be used as a ruler to evaluate the distance between the contacts in the sub-1-nm regime and with sub-Å precision. This ruler can be used to measure the distance between two plasmonic nanostructures located at the designated breaking point of the break junction. In this work, an experimental setup together with suitable nanofabricated break junctions is developed that enables us to perform simultaneous gap-dependent optical and electrical characterization of coupled plasmonic particles, more specifically bowtie antennas in the highly interesting gap range from few nanometers down to zero gap width. The plasmonic break junction experiment is performed in the focus of a confocal microscope. Confocal scanning images and current measurements are simultaneously recorded and exhibit an increased current when the laser is focused in the proximity of the junction. This setup offers a flexible platform for further correlated optoelectronic investigations of coupled antennas or junctions bridged by nanomaterials.

In-situ photoconductivity measurement of imidazole in optical fiber break-junctions

2021 ◽  
Author(s):  
Zhikai Zhao ◽  
Chenyang Guo ◽  
Lifa Ni ◽  
Xueyan Zhao ◽  
Surong Zhang ◽  
...  
Keyword(s):  
Electron Transport ◽  
Optical Fiber ◽  
Transport Properties ◽  
Molecular Junctions ◽  
Break Junction ◽  
Break Junctions ◽  
Fiber Break ◽  
Electron Transport Properties ◽  
Photoconductivity Measurement

We develop a method based on the mechanically controllable break junction technique to investigate the electron transport properties of single molecular junctions upon fiber waveguided light. In our strategy, a...

scholarly journals Quantum Degeneracy in Atomic Point Contacts Revealed by Chemical Force and Conductance

2013 ◽  
Vol 111 (10) ◽  
Author(s):  
Yoshiaki Sugimoto ◽  
Martin Ondráček ◽  
Masayuki Abe ◽  
Pablo Pou ◽  
Seizo Morita ◽  
...  
Keyword(s):  
Point Contacts ◽  
Quantum Degeneracy ◽  
Atomic Point Contacts ◽  
Chemical Force

Supercurrent in Atomic Point Contacts and Andreev States

2000 ◽  
Vol 85 (1) ◽  
pp. 170-173 ◽  
Author(s):  
M. F. Goffman ◽  
R. Cron ◽  
A. Levy Yeyati ◽  
P. Joyez ◽  
M. H. Devoret ◽  
...  
Keyword(s):  
Point Contacts ◽  
Atomic Point Contacts

Magnetoresistance of single molecular junctions measured by a mechanically controllable break junction method

2011 ◽  
Vol 98 (5) ◽  
pp. 053110 ◽  
Author(s):  
Ryo Yamada ◽  
Motoki Noguchi ◽  
Hirokazu Tada
Keyword(s):  
Molecular Junctions ◽  
Break Junction

Study of Molecular Junctions with a Combined Surface-Enhanced Raman and Mechanically Controllable Break Junction Method

2006 ◽  
Vol 128 (46) ◽  
pp. 14748-14749 ◽  
Author(s):  
Jing-Hua Tian ◽  
Bo Liu ◽  
Li ◽  
Zhi-Lin Yang ◽  
Bin Ren ◽  
...  
Keyword(s):  
Molecular Junctions ◽  
Break Junction ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

scholarly journals Electromigration-induced directional steps towards formation of single atomic Ag contacts.

2019 ◽  
Author(s):  
Atasi Chatterjee ◽  
Christoph Tegenkamp ◽  
Herbert Pfnür
Keyword(s):  
Fourier Transforms ◽  
Point Contact ◽  
Point Contacts ◽  
Cross Sectional ◽  
Shell Effects ◽  
Average Grain Size ◽  
Directional Motion ◽  
Morphological Differences ◽  
Atomic Point Contacts ◽  
Thinning Process

Background:The process of electromigration is still not quantitatively understood. We showed recently that it can be used reliably for formation of single atomic point contacts in pre-structured Ag nanostructures. Results:The process of formation of nanocontacts by electromigration (EM) down to a single atomic point contact was investigated for ultrathin (5 nm) Ag structures at 100\,K. In this paper, we compare the structures with constrictions below the average grain size of Ag layers (15 nm), where the contribution of a single grain dominates, with structures of much larger constrictions of around 150 nm with multiple grains at the centre constriction during the initial steps of EM. The latter initially form filamentous structures. Despite these clear morphological differences, the conductance traces of both types of structures suggest that finally, i.e., in the quantized conduction regime, only one atomic point contact was formed. To analyse the thinning process within the semi-classical regime in detail, we used experimental conductance histograms in the range between 2 G0 and 15G0 and their corresponding Fourier transforms (FT). The FT analysis of the conductance histograms exhibits a clear preference for thinning along the [100] direction. Using well-established models, both atom-by-atom steps and ranges of stability, presumably caused by electronic shell effects, can be discriminated. A large range (5 to 14G0) of unstable conductance values was found in these electromigrated contacts that has not been reported by other techniques. It was observed irrespective of the initial geometry. Conclusion: Although the directional motion of atoms during EM leads to specific properties like the instabilities mentioned, similarities to mechanically opened contacts with respect to cross sectional stability were found.

scholarly journals A force sensor for atomic point contacts

2005 ◽  
Vol 76 (10) ◽  
pp. 103903 ◽  
Author(s):  
A. M. C. Valkering ◽  
A. I. Mares ◽  
C. Untiedt ◽  
K. Babaei Gavan ◽  
T. H. Oosterkamp ◽  
...  
Keyword(s):  
Force Sensor ◽  
Point Contacts ◽  
Atomic Point Contacts

scholarly journals Enhanced coupling through π-stacking in imidazole-based molecular junctions

2019 ◽  
Vol 10 (43) ◽  
pp. 9998-10002 ◽  
Author(s):  
Tianren Fu ◽  
Shanelle Smith ◽  
María Camarasa-Gómez ◽  
Xiaofang Yu ◽  
Jiayi Xue ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Single Molecule ◽  
Scanning Tunneling Microscope ◽  
Density Functional ◽  
Molecular Junctions ◽  
Scanning Tunneling ◽  
Break Junction ◽  
Functional Theory ◽  
Tunneling Microscope ◽  
Single Molecule Junctions

We demonstrate that imidazole based π–π stacked dimers form strong and efficient conductance pathways in single-molecule junctions using the scanning-tunneling microscope-break junction (STM-BJ) technique and density functional theory-based calculations.

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