Decoding the mechanical conductance switching behaviors of dipyridyl molecular junctions

Sun, Feng; Liu, Lin; Zheng, Changxi; Li, Yuchen; Yan, Yan; Fu, Xiaoxiao; Wang, Chuan‐Kui; Liu, Ran; Xu, Bingqian; Li, Zong-Liang

doi:10.1039/d3nr00505d

Cited by 6 publications

(1 citation statement)

References 78 publications

(180 reference statements)

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“…The most stable configuration of the 4,4′-BPY adsorbed on the Au(111) surface is that the N atom is located at the top of the Au atom, which is in agreement with the previous studies. 41 , 42 Based on this, the energy of different angles has been considered while the molecule is adsorbed on the top of the Au(111) surface ( Figure S20 ). The results indicated that there are three obvious energy valleys corresponding angles are about 38°, 62°, and 82° (see Figure 4 A), respectively (the angle is defined as between the line between two nitrogen atoms and the Au(111) surface).…”

Section: Resultsmentioning

confidence: 99%

Tuning charge transport by manipulating concentration dependent single-molecule absorption configurations

Long,

Xu,

Duan

et al. 2024

iScience

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Section: Resultsmentioning

confidence: 99%

Tuning charge transport by manipulating concentration dependent single-molecule absorption configurations

Long,

Xu,

Duan

et al. 2024

iScience

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Toward Practical Single‐Molecule/Atom Switches

Xu,

Gao,

Emusani

et al. 2024

Advanced Science

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Electronic switches have been considered to be one of the most important components of contemporary electronic circuits for processing and storing digital information. Fabricating functional devices with building blocks of atomic/molecular switches can greatly promote the minimization of the devices and meet the requirement of high integration. This review highlights key developments in the fabrication and application of molecular switching devices. This overview offers valuable insights into the switching mechanisms under various stimuli, emphasizing structural and energy state changes in the core molecules. Beyond the molecular switches, typical individual metal atomic switches are further introduced. A critical discussion of the main challenges for realizing and developing practical molecular/atomic switches is provided. These analyses and summaries will contribute to a comprehensive understanding of the switch mechanisms, providing guidance for the rational design of functional nanoswitch devices toward practical applications.

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Molecular dimer junctions forming: Role of disulfide bonds and electrode‐compression‐time

Zhao,

Yan,

Tan

et al. 2024

SmartMat

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Thanks to their excellent bond strength, phenyl‐based molecules with thiol anchoring groups are extensively employed to form stable single‐molecule junctions. However, two critical questions are still not answered which seriously hinder high‐yield establishing reliable molecular functional devices: (1) Whether molecular dimer junctions will be formed, and if this is the case, whether the dimerization is caused by intermolecular disulfide bonds or π–π stacking of phenyl rings; (2) Upon a mechanical‐compression force, is it possible that both anchoring groups of the molecule bond to the same electrode instead of bridging two opposite electrodes, which would drastically reduce the yield of the molecular junctions. Here, combining UV‐Vis/Raman spectroscopy of bulk molecules and conductance/flicker‐noise measurements of single molecules, we give compelling evidence that molecular dimers naturally form under ambient conditions, primarily via disulfide bonds rather than by π–π stacking. We further proposed a technique, named electrode‐compression‐hold‐on (ECHO), and reveal that the two thiol groups of phenyl‐backboned molecules will bond to the same electrode upon a compression force with a prolongated ECHO time. In contrast, the compression‐time‐dependent phenomenon is not observed for alkyl‐backboned molecules. The underlying mechanism for these unprecedented observations is elucidated, shedding light on the yield of molecular junctions.

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Decoding the mechanical conductance switching behaviors of dipyridyl molecular junctions

Abstract: The dipyridyl molecular junctions often show intriguing conductance switching behaviors with mechanical modulations, but the mechanisms are still not completely revealed. By applying ab initio-based adiabatic simulation method, the configuration...

Cited by 6 publications

References 78 publications

Tuning charge transport by manipulating concentration dependent single-molecule absorption configurations

Tuning charge transport by manipulating concentration dependent single-molecule absorption configurations

Toward Practical Single‐Molecule/Atom Switches

Molecular dimer junctions forming: Role of disulfide bonds and electrode‐compression‐time

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