Taking the temperature of hot carriers Hot are expected to arise in plasmonic nanostructures because nonradiative decay surface plasmons. However, identifying and determining just how “hot” these actually has been challenging. Reddy et al. devised a technique that looks at carrier transport through single molecular junction, which effectively acts as an energy filter, show it can be used determine distribution nanostructure (see Perspective by Martín-Moreno). These could harnessed enhance...

Electrochemical gating at the single molecule level of viologen molecular bridges in ionic liquids is examined. Contrary to previous data recorded aqueous electrolytes, a clear and sharp peak conductance versus electrochemical potential obtained liquids. These are rationalized terms two-step model for charge transport across redox bridge. In this gate coupling liquid found be fully effective with modeled parameter, ξ, unity. This compares much lower parameter 0.2 equivalent system. study...

Abstract A key target in molecular electronics has been molecules having switchable electrical properties. Switching between two states demonstrated using such stimuli as light, electrochemical voltage, complexation and mechanical modulation. classic example of the latter is switching 4,4′‐bipyridine, leading to conductance modulation around 1 order magnitude. Here, we describe use side‐group chemistry control properties a single‐molecule electromechanical switch, which can be cycled by...

The local molecular environment is a critical factor which should be taken into account when measuring single-molecule electrical properties in condensed media or the design of future electronic single molecule sensing devices. Supramolecular interactions can used to control assemblies and have been create microenvironments, for instance, chemical reactions. Here, we use supramolecular microenvironments influence conductance wires. Cucurbit[8]uril (CB[8]) with large hydrophobic cavity was...

Integrating radical (open-shell) species into non-cryogenic nanodevices is key to unlocking the potential of molecular electronics. While many efforts have been devoted this issue, in absence a chemical/electrochemical open-shell character generally lost contact with metallic electrodes. Herein, single-molecule devices incorporating 6-oxo-verdazyl persistent fabricated using break-junction techniques. The retained at room temperature, and electrochemical gating permits situ reduction...

Abstract Mechanosensitive molecular junctions, where conductance is sensitive to an applied stress such as force or displacement, are a class of nanoelectromechanical systems unique for their ability exploit quantum mechanical phenomena. Most studies so far relied on reconfiguration the molecule‐electrode interface impart mechanosensitivity, but this approach limited and, generally, poorly reproducible. Alternatively, devices that conformational flexibility wires have been recently proposed....

This Perspective highlights relationships between chemical features of metal bis(acetylide) complexes and their electrical response in a molecular junction.

Stimuli-responsive molecular junctions, where the conductance can be altered by an external perturbation, are important class of nanoelectronic devices. These have recently attracted interest as large effects introduced through exploitation quantum phenomena. We show here that significant changes in attained a molecule is repeatedly compressed and relaxed, resulting folding along flexible fragment cycling between anti syn conformation. Power spectral density analysis DFT transport...

Polyoxometalates have been proposed in the literature as nanoelectronic components, where they could offer key advantages with their structural versatility and rich electrochemistry. Apart from a few studies on ensemble behaviour (as monolayers or thin films), this potential remains largely unexplored. We synthesised pyridyl-capped Anderson-Evans polyoxometalate used it to fabricate single-molecule junctions, using organic termini chemically "solder" single cluster two nanoelectrodes....

One of the principal aims single-molecule electronics is to create practical devices out individual molecules. Such are expected play a particularly important role as novel sensors thanks their response wide ranging external stimuli. Here we show that conductance molecular junction can depend on two independent stimuli simultaneously. Using scanning tunnelling microscope break-junction technique (STM-BJ), found 4,4′-vinylenedipyridine (44VDP) junctions with Ni contacts depends both...

Efficient charge transport across long molecular wires enabled by charge-transfer complexation, through Fermi level pinning of interference features.

Most studies in molecular electronics focus on altering the wire backbone to tune electrical properties of whole junction. However, it is often overlooked that chemical structure groups anchoring molecule metallic electrodes influences electronic system and, therefore, its conductance. We synthesised electron-accepting dithienophosphole oxide derivatives and fabricated their single-molecule junctions. found anchor group has a dramatic effect charge-transport efficiency: our case,...

Abstract Molecular Field-Coupled Nanocomputing (MolFCN) represents a revolutionary approach to computational technology, exploiting single molecules for encoding and processing logical information. MolFCN permits zero-current operations achieve ultra-low power hyper-miniaturized computing units. This perspective article explores the current state future potential of MolFCN, highlighting recent technological advancements, applications, significant challenges that lie ahead. Despite...

Flicker noise analysis has found widespread use in the molecular electronics community over past 9 years. The power of junctions and value its scaling exponent n provide information on spatial overlap scattering states single-molecule give unique insights into quantum transport phenomena at level. predominant drawback this analytical tool is inconsistency methodologies employed, resulting irreproducibility across data sets acquired different conditions or laboratories. Herein, we a pathway...

Open-shell molecular wires offer prospects for achieving enhanced transport, additional functionality, efficient thermoelectric conversion, and they attract attention future applications as spin qubits. The synthesis of such compounds bench-stable species is however inherently challenging due to their high reactivity, integration into electronic/spintronic devices complicated by charge transfer phenomena that can erase the open-shell state. Ferrocenium cations be isolated in combination with...

The solid-state structures of organic charge transfer (CT) salts are critical in determining their mode transport, and hence unusual electrical properties, which range from semiconducting through metallic to superconducting. In contrast, using both theory experiment, we show here that the conductance metal |single molecule| junctions involving aromatic donor moieties (dialkylterthiophene, dialkylbenzene) increase by over an order magnitude upon formation complexes with tetracyanoethylene...

Electrical conductance across a molecular junction is strongly determined by the anchoring group of molecule. Here we highlight unusual behavior 1,4-bis(1H-pyrazol-4-ylethynyl)benzene that exhibits unconventional current versus junction-stretching distance curves, which are peak-shaped and feature two conducting states 2.3 × 10-4 G0 3.4 G0. A combination theory experiments used to understand single-molecule junctions featuring this new group, i.e., pyrazolyl. These results demonstrate...

We demonstrate here a new concept for metal-molecule-semiconductor nanodevice employing Au and GaAs contacts that acts as photodiode. Current-voltage traces such junctions are recorded using STM, the "blinking" or "I(t)" method is used to record electrical behavior at single-molecule level in dark under illumination, with both low highly doped samples two different types of molecular bridge: nonconjugated pentanedithiol more conjugated 1,4-phenylene(dimethanethiol). Junctions show poor...

Abstract Future applications of single‐molecular and large‐surface area molecular devices require a thorough understanding control junctions, interfacial phenomena, intermolecular interactions. In this contribution the concept single‐molecule junction host‐guest complexation to sheath benchmark wire–namely 4,4′‐(1,4‐phenylenebis(ethyne‐2,1‐diyl))dianiline – with an insulating cage, pillar[5]arene 1,4‐diethoxy‐2‐ethyl‐5‐methylbenzene is presented. The insertion one guest wire into host probed...

Imidazole forms oligomeric chains connecting two gold nano-electrodes that facilitate efficient charge transport, with water included in aqueous solutions.

Abstract Open‐shell materials bearing multiple spin centres provide a key route to efficient charge transport in single‐molecule electronic devices. They have narrow energy gaps, and their molecular orbitals align closely the Fermi level of metallic electrodes, thus allowing higher conductance. Maintaining stabilising open‐shell states—especially contact with electrodes—is however very challenging, generally requiring continuous chemical or electrochemical potential avoid self‐immolation...

In this contribution we demonstrate structural control over a transport resonance in HS(CH$_{2}$)$_{n}$[1,4 - C$_{6}$H$_{4}$](CH$_{2}$)$_{n}$SH (n = 1, 3, 4, 6) metal molecule junctions, fabricated and tested using the scanning tunnelling microscopy-based $I(z)$ method. The Breit-Wigner originates from one of arene $\pi$-bonding orbitals, which sharpens moves closer to contact Fermi energy as $n$ increases. Varying number methylene groups thus leads very shallow decay conductance with length...

A key area of activity in contemporary molecular electronics is the chemical control conductance junctions and devices. Here we study modify a range pyrrolodipyridines (carbazole-like) wires. We are able to change electrical quantum interference patterns by chemically regulating bridging nitrogen atom tricyclic ring system. series eight different N-substituted has been synthesized subjected single-molecule characterization using an STM break junction. Correlations these experimental data...