In Situ Adjustable Nanogaps and In‐Plane Break Junctions

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2023
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Zhao, Xueyan
Zhang, Xubin
Yin, Kaikai
Zhang, Surong
Zhao, Zhikai
Tan, Min
Xu, Xiaona
Xiang, Dong
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Small Methods. Wiley. 2023, 7(4), 2201427. eISSN 2366-9608. Available under: doi: 10.1002/smtd.202201427
Zusammenfassung

The ability to precisely regulate the size of a nanogap is essential for establishing high-yield molecular junctions, and it is crucial for the control of optical signals in extreme optics. Although remarkable strategies for the fabrication of nanogaps are proposed, wafer-compatible nanogaps with freely adjustable gap sizes are not yet available. Herein, two approaches for constructing in situ adjustable metal gaps are proposed which allow Ångstrom modulation resolution by employing either a lateral expandable piezoelectric sheet or a stretchable membrane. These in situ adjustable nanogaps are further developed into in-plane molecular break junctions, in which the gaps can be repeatedly closed and opened thousands of times with self-assembled molecules. The conductance of the single 1,4-benzenediamine (BDA) and the BDA molecular dimer is successfully determined using the proposed strategy. The measured conductance agreeing well with the data by employing another well-established scanning tunneling microscopy break junction technique provides insight into the formation of molecule dimer via hydrogen bond at single molecule level. The wafer-compatible nanogaps and in-plane dynamical break-junctions provide a potential approach to fabricate highly compacted devices using a single molecule as a building block and supply a promising in-plane technique to address the dynamical properties of single molecules.

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530 Physik
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Nanogaps, Ångstrom modulation resolution, molecular break junctions
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ISO 690ZHAO, Xueyan, Xubin ZHANG, Kaikai YIN, Surong ZHANG, Zhikai ZHAO, Min TAN, Xiaona XU, Maoning WANG, Elke SCHEER, Dong XIANG, 2023. In Situ Adjustable Nanogaps and In‐Plane Break Junctions. In: Small Methods. Wiley. 2023, 7(4), 2201427. eISSN 2366-9608. Available under: doi: 10.1002/smtd.202201427
BibTex
@article{Zhao2023Adjus-60089,
  year={2023},
  doi={10.1002/smtd.202201427},
  title={In Situ Adjustable Nanogaps and In‐Plane Break Junctions},
  number={4},
  volume={7},
  journal={Small Methods},
  author={Zhao, Xueyan and Zhang, Xubin and Yin, Kaikai and Zhang, Surong and Zhao, Zhikai and Tan, Min and Xu, Xiaona and Wang, Maoning and Scheer, Elke and Xiang, Dong},
  note={Article Number: 2201427}
}
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