Plasmon-Induced Conductance Enhancement in Single-Molecule Junctions

Vadai, Michal; Nachman, Nirit; Zion, Matan Yah Ben; Bürkle, Marius; Pauly, Fabian; Cuevas, Juan Carlos; Selzer, Yoram

doi:10.1021/jz4014008

Cited by 61 publications

(77 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This enhancement is not due to a bolometric effect but results from light focusing between the AuNPs which increases the photoelectron emission (hot electrons) in the LUMO of the dithiol‐PZn 3 . This effect has also been reported using a single‐molecule junction studied in STM break junctions . A two‐fold increase in the current flowing inside the junction under illumination (positive photocurrent) at fixed bias as a result of hot electrons crossing the molecular junction was observed.…”

Section: Plasmonic Molecular Electronicssupporting

confidence: 74%

From active plasmonic devices to plasmonic molecular electronics

Lacroix

Quynh

et al. 2019

Polymer International

View full text Add to dashboard Cite

This work is mainly focused on studies combining plasmonic nanostructures and π‐conjugated systems. It describes active molecular plasmonic devices in which π‐conjugated molecules and polymers, grafted on gold nanoparticles, are used to tune the plasmonic properties of metal nanostructures. It also explores two emerging research fields, i.e. plasmonic electrochemistry and plasmonic molecular electronics. In the former, electrochemical reactions are controlled and triggered by plasmons which yield various light‐induced electrochemical reactions at the nanoscale. In the latter, one combines molecular plasmonics and molecular electronics in plasmonic molecular devices. © 2018 Society of Chemical Industry

show abstract

Section: Plasmonic Molecular Electronicssupporting

confidence: 74%

From active plasmonic devices to plasmonic molecular electronics

Lacroix

Quynh

et al. 2019

Polymer International

View full text Add to dashboard Cite

show abstract

“…Similar to classic tunnellng, the distance between the nanoparticle and the film is important. This tunneling can further modify the optical absorption properties 59 and enhance the conductance of these small molecular junctions 60 . We consider this tunneling as a charge transfer process from using a simple Au4 / MBN / Au3 model system (Fig.…”

Section: Resultsmentioning

confidence: 99%

Detection of electron tunneling across plasmonic nanoparticle–film junctions using nitrile vibrations

Wang

Yao

Parkhill

et al. 2017

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

The significant electric field enhancements that occur in plasmonic nanogap junctions are instrumental in boosting the performance of spectroscopy, optoelectronics and catalysis. Electron tunneling, associated with quantum effects in small junctions, is reported to limit the electric field enhancement. However, observing and quantitatively determining how tunneling alters the electric fields within small gaps is challenging due to the nanoscale dimensions and heterogeneity present experimentally. Here we report the use of a nitrile probe placed in the nanoparticle-film gap junctions to demonstrate that the change in the nitrile stretching band associated with the vibrational Stark effect can be directly correlated with the local electric field environment modulated by gap size variations. The Stark shift arises correlates with plasmon resonance shifts associated with electron tunneling across the gap junction. Time dependent changes in the nitrile band with extended illumination further support a build up of charge associated with optical rectification in the coupled plasmon system. Computational models agree with our experimental observations that the frequency shifts arise from a vibrational Stark effect. Large local electric fields associated with the smallest gap junctions give rise to significant Stark shifts. These results indicate that nitrile Stark probes can measure the local field strengths in plasmonic junctions and monitor the subtle changes in the local electric fields resulting from electron tunneling.

show abstract

“…335 Such junctions are also of interest for monitoring optical plasmonic effects. [336][337][338][339][340]335 Gold nanowires can be trapped on molecularly modified electrodes by AC dielectrophoresis. 341,342 As an alternative geometry, devices with electrode gaps of 10-to 50 nm, developed via complex (electron-beam) lithography have been used to trap proteins so as to allow transport measurements while still allowing the proteins to interact with the surrounding.…”

Section: Macroscopic and Permanent Contact Measurementmentioning

confidence: 99%

Protein bioelectronics: a review of what we do and do not know

et al. 2018

View full text Add to dashboard Cite

We review the status of protein-based molecular electronics. First, we define and discuss fundamental concepts of electron transfer and transport in and across proteins and proposed mechanisms for these processes. We then describe the immobilization of proteins to solid-state surfaces in both nanoscale and macroscopic approaches, and highlight how different methodologies can alter protein electronic properties. Because immobilizing proteins while retaining biological activity is crucial to the successful development of bioelectronic devices, we discuss this process at length. We briefly discuss computational predictions and their connection to experimental results. We then summarize how the biological activity of immobilized proteins is beneficial for bioelectronic devices, and how conductance measurements can shed light on protein properties. Finally, we consider how the research to date could influence the development of future bioelectronic devices.

show abstract

Plasmon-Induced Conductance Enhancement in Single-Molecule Junctions

Cited by 61 publications

References 47 publications

From active plasmonic devices to plasmonic molecular electronics

From active plasmonic devices to plasmonic molecular electronics

Detection of electron tunneling across plasmonic nanoparticle–film junctions using nitrile vibrations

Protein bioelectronics: a review of what we do and do not know

Contact Info

Product

Resources

About