Adding ethylene glycol (EG) to a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) solution improves the crystallinity of PEDOT and ordering nanocrystals in solid films. The carrier-mobility enhancement is confirmed by using ion-gel transistors combined with situ UV–vis–NIR spectroscopy.

We report a rapid and scalable method for the separation of metallic semiconducting single-wall carbon nanotubes (SWCNTs); is performed by selective adsorption SWCNTs on agarose gel. The most effective was realized simple procedure in which piece gel containing sodium dodecyl sulfate frozen, thawed, squeezed. This process affords solution 70% pure leaves 95% SWCNTs. Field-effect transistors constructed from separated have been demonstrated to function without any electrical breakdown.

Screen-printed polymer thermoelectric devices provided sufficient power to illuminate light-emitting diodes.

We report an increase in the thermoelectric power factor of poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) from 23 ± 5 to 225 130 µW/(m·K2) high-humidity conditions. This enhancement was caused mainly by apparent Seebeck coefficient, which could be related morphological change after water absorption or electrochemical reaction PEDOT air. Our results demonstrate a positive effect PEDOT:PSS system and indicate need for well-controlled measurement conditions, particularly...

A physical reservoir device with tunable transient dynamics is strongly required to process time-series data various timescales generated in the edge region. In this study, we proposed using dielectric relaxation at an electrode-ionic liquid (IL) interface as by making most of designable physicochemical properties ILs. The a Au/IL/Au were characterized function alkyl chain length cations IL (1-alkyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide). By considering weighted sum...

Electrochromic devices using colorful metallic single-wall carbon nanotube films are produced. The SWCNTs act as both electrochromic components and electrodes, confirming a route to all devices. Detailed facts of importance specialist readers published "Supporting Information". Such documents peer-reviewed, but not copy-edited or typeset. They made available submitted by the authors. Please note: publisher is responsible for content functionality any supporting information supplied Any...

Herein, a physical reservoir device that uses faradaic currents generated by redox reactions of metal ions in ionic liquids was developed. Synthetic time-series data consisting randomly arranged binary number sequences ("1" and "0") were applied as isosceles-triangular voltage pulses with positive negative heights, respectively, the effects current on short-term memory parity-check task accuracies verified. The signal for first half triangular voltage-pulse period, which contained much...

Abstract We synthesized ionic liquids (ILs) containing Cu cations in which the stable valence state of was systematically controlled by introducing a cyano group (CN) into cationic side chain. also explored current waveform and underlying electrochemical reaction appropriate for physical reservoir computing. An IL-based device (IL-PRD) using ILs with CN showed higher short-term memory capability, non-linearity, effective data dimensionality than an IL-PRD IL without CN. found that ratio...

In recent years, several researchers have reported the occurrence of reversible resistance switching effects in simple metal nanogap junctions. A large negative is observed I-V characteristics such a junction when high-bias voltages are applied. This phenomenon characteristic behaviour on nanometre scale; it only occurs for gap widths slightly under 13 nm. Furthermore, exhibits non-volatile hysteresis bias voltage reduced very rapidly from high level to around 0 V, and slowly. change as...

We have measured electric conductance and surface enhanced Raman scattering (SERS) spectra for the benzenedithiol molecules bridging between Au nano gap electrodes at room temperature to investigate optical properties of molecular junction. The current–voltage characteristic junction was investigated based on single level tunneling model considering that Fermi distribution function got smeared out finite temperature, which provided information number metal electrodes, energy difference...

Exploring the various applications of conjugated polymers requires systematic studies their physical properties as a function doping density, which, consequently, calls for precise control density. In this study, we report novel solid-state photoinduced charge-transfer reaction that dedopes highly conductive polyelectrolyte complexes such poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate). Varying UV-irradiation time material allows carrier density inside film to be precisely controlled...

Thin-film transistors (TFTs) using a random network of semiconductor-enriched single-wall carbon nanotubes (SWCNTs) were fabricated on SiO2/Si substrate. Semiconductor-enriched SWCNTs extracted from pristine sample by centrifugation agarose gel. Prior to depositing the SWCNTs, substrate surface was modified self-assembly monolayer aminosilanes produce an ideal two-dimensional structure. As result, all TFTs had on/off current ratios higher than 104 without electrical breakdown, while broad...

A novel porphyrin-fused porphyrin is formed by an oligomerization reaction of a (porphyrinato)nickel complex with TeCl4; the isolated compound, [2]porphyracene, was characterized spectroscopic methods and direct observation using scanning tunnelling microscopy; excitation energy value 13460 cm–1 (743 nm) lowest reported for dimers.

We demonstrate a high yield production scheme to fabricate sub-10 nm co-planar metal-insulator-metal junctions without using electron beam lithography. The fabricating procedure contains two photolithographys followed by shadow evaporation. Ultrasmall gaps were formed in the crossing region of metal layers during evaporation second layer. sizes estimated scanning microscopy images. Poly (3-hexylthiophene-2,5-diyl) deposited on special ink-jet technique. results conductivity measurement...

A novel method is presented for manipulation of a single nanoparticle using carbon nanotube probe in scanning electron microscope chamber. Nanomanipulation was achieved without dependence on the conductivity nanoparticle. In order to demonstrate effectiveness this technique, insulative Fe2O3 and conductive Fe3O4 were arranged nanogap junction measurement electrical conductivity. The result clearly showed difference between resistance two iron oxides. It considered that technique could be...

We developed a procedure for the fabrication of sub 1 nm gap Au electrodes via electromigration. Self-aligned nanogap formation was achieved by applying bias voltage, which causes electromigration during metal evaporation. also demonstrated application this method nanogaps as small in width, and we found that size can be controlled changing magnitude applied voltage. On basis electric conductance surface-enhanced Raman scattering (SERS) measurements, fabricated estimated to nearly equal...

Highly stable, nonvolatile, high-temperature memory based on resistance switching was realized using a polycrystalline platinum (Pt) nanogap. The operating temperature of the can be drastically increased by presence sharp-edged Pt crystal facet in A short distance between edges maintains nanogap shape at high temperature, and sharp densifies electric field to maintain stable current flow due migration. Even 873 K, which is significantly higher than feasible for conventional semiconductor...

Fullerene has been expected to realize next generation nanoelectronics as a key element. However, although single-fullerene switch operation using scanning tunneling microscope (STM) developed, the structural architecture with electrodes is still needed make progress devices. Because fullerenes are smaller than 1.0 nm, which suitable for STM approach, subnanometer size too small, even latest device electrode fabrication techniques. Here we present principle experiment on self-assembling...

We have developed a fabrication method for nanogap electrodes without employing photo- or electron-beam lithography to measure the electrical characteristics of nanostructured molecules. This angle-controlled shadow-masking enables us construct wet process after molecules are positioned on substrate. The proposed makes it possible structurally deforming denaturing due either step edge an electrode organic solvents used in process. results demonstrate that gap length between less than 100 nm...

Conductance of bundled single-walled carbon nanotubes (b-SWCNTs) are measured by point-contact current-imaging atomic force microscopy (PCI–AFM). Simultaneous mapping the topographic information and current through SWCNTs enable us to investigate relationship between structure conductance. Variation in resistance a b-SWCNT indicates that was higher than 107 Ω with strong voltage dependence. Because PCI–AFM measurement can obtain vertical conductance information, this approach appears be...

For obtaining molecular devices using metal−molecule−metal junctions, it is necessary to fabricate a steady conductive bridge-structure; that stable chemical bonds need be established from single molecule two facing electrodes. In the present paper, we show steadiness of bridge-structure depends on structure bridge for nanogap junctions three types modified oligo(phenylene vinylene)s (OPVs): α,ω-bis(thioacetate) vinylene) (OPV1), α,ω-bis(methylthioacetate) (OPV2), and OPV2 consisting ethoxy...

Oblique deposition was used to fabricate two metal electrodes separated by a gap of less than 10 nm on SiO2 substrate. By sweeping voltage between these electrodes, negative resistance change several digits observed in vacuum. In this work, made Au, Pd, Pt, and Ta were fabricated, their electric properties measured The for all the four metals. result measurements clearly shows correlation at minimum melting point. Also, calculated temperature rise with These facts support effect that thermal...

A resistance switching effect was found for a nanogap junction that has electrodes composed of single-wall carbon nanotubes (SWCNTs) encapsulate fullerenes. clear negative differential and repeated on–off cycles were observed in the current–voltage characteristics junctions. The results suggest switch is due to gap size changes result migration fullerene molecules. This implied electrode areas could be miniaturized true nanoscale size.