Molybdenum disulfide (MoS(2)) thin-film transistors were fabricated with ion gel gate dielectrics. These exhibited excellent band transport a low threshold voltage (<1 V), high mobility (12.5 cm(2)/(V·s)) and on/off current ratio (10(5)). Furthermore, the MoS(2) remarkably mechanical flexibility, no degradation in electrical characteristics was observed when they significantly bent to curvature radius of 0.75 mm. The superior performance pliability films make them suitable for use large-area...

Molybdenum disulfide (MoS2) has gained attention because of its high mobility and circular dichroism. As a crucial step to merge these advantages into single device, we present method that electronically controls locates p-n junctions in liquid-gated ambipolar MoS2 transistors. A bias-independent junction was formed, it displayed rectifying I-V characteristics. This diode could perform role the development optoelectronic valleytronic devices.

Abstract Single-chirality, single-wall carbon nanotubes are desired due to their inherent physical properties and performance characteristics. Here, we demonstrate a chromatographic separation method based on newly discovered chirality-selective affinity between gel containing mixture of the surfactants. In this system, two different selectivities found: chiral-angle selectivity diameter selectivity. Since chirality is determined by chiral angle diameter, combining these independent leads...

Abstract Low-dimensional materials have recently attracted much interest as thermoelectric because of their charge carrier confinement leading to performance enhancement. Carbon nanotubes are promising candidates one-dimensionality in addition unique advantages such flexibility and light weight. However, preserving the large power factor individual carbon macroscopic assemblies has been challenging, primarily due poor sample morphology a lack proper Fermi energy tuning. Here, we report an...

Abstract Experimental band structure analyses of single-walled carbon nanotubes have not yet been reported, to the best our knowledge, except for a limited number reports using scanning tunnelling spectroscopy. Here we demonstrate experimental determination excitonic structures single-chirality their circular dichroism spectra. In this analysis, use gel column chromatography combining overloading selective adsorption with stepwise elution separate 12 different enantiomers. Our samples show...

Zinc oxide (ZnO) nanosheets have shown great promise for ultraviolet (UV) photodetectors due to their excellent optoelectronic properties and atomically thin structure. Surfactant-assisted ionic layer epitaxy (ILE) is a simple scalable technique synthesizing monolayered ZnO nanosheets; however, the formation of byproduct inevitable detrimental device applications. This study demonstrates rational strategy selective growth in ILE without formation. The detailed investigation revealed that...

Abstract Near-infrared photoluminescent single-walled carbon nanotubes (CNTs) are expected to provide effectual bio-imaging tools, although, as yet, only limited applications have been reported. Here, we report that CNTs coated with an amphiphilic and biocompatible polymer, poly(2-methacryloyloxyethyl phosphorylcholine- co - n -butyl methacrylate; PMB), generate high-quality images of brown fat. Brown fat is a heat-productive adipose tissue, which attracting increasing attention new...

Semiconductors are generally considered far superior to metals as thermoelectric materials because of their much larger Seebeck coefficients (S). However, a maximum value S in semiconductor is normally accompanied by minuscule electrical conductivity (σ), and hence, the power factor (P = S2σ) remains small. An attempt increase σ increasing Fermi energy (EF), on other hand, decreases S. This trade-off between well-known dilemma developing high-performance devices based semiconductors. Here,...

Confined electrons collectively oscillate in response to light, resulting a plasmon resonance whose frequency is determined by the electron density and size shape of confinement structure. Plasmons metallic particles typically occur classical regime where characteristic quantum level spacing negligibly small compared plasma frequency. In doped semiconductor wells, excitations can be observed, quantization energy exceeds Such intersubband plasmons mid- far-infrared ranges exhibit variety...

Creating artificial matter with controllable chirality in a simple and scalable manner brings new opportunities to diverse areas. Here we show two such methods based on controlled vacuum filtration - twist stacking mechanical rotation for fabricating wafer-scale chiral architectures of ordered carbon nanotubes (CNTs) tunable large circular dichroism (CD). By controlling the angle handedness twist-stacking approach, maximize CD response achieve high deep-ultraviolet ellipticity 40 ± 1 mdeg...

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...

Ever since the discovery of carbon nanotubes (CNTs), it has long been a challenging goal to create macroscopically ordered assemblies, or crystals, CNTs that preserve one-dimensional quantum properties individual on macroscopic scale. Recently, simple and well-controlled method was reported for producing wafer-scale crystalline films highly aligned densely packed through spontaneous global alignment occurs during vacuum filtration (Nat. Nanotechnol. 2016, 11, 633). However, full...

The covalent functionalization of single-walled carbon nanotubes (SWCNTs) with luminescent quantum defects enables their application as near-infrared single-photon sources, optical sensors, and for in vivo tissue imaging. Tuning the emission wavelength defect density is crucial these applications. While former can be controlled by different synthetic protocols easily measured, densities are still determined relative rather than absolute values, limiting comparability between nanotube batches...

We developed circularly polarized light-time-resolved microwave conductivity (CPL-TRMC) for investigation of the CPL-dependent photoinduced charge carrier dynamics in chiral materials with chiroptical properties. Chiral R- or S-perylenediimide (PDI) molecular thin films were paired handedness-sorted (6,5) and (11,-5) single-walled carbon nanotube (SWCNT) to compose a donor (D)-acceptor (A) system spin-dependent separation process, D-A was examined through linear circular...

Field‐effect transistors that employ an electrolyte in place of a gate dielectric layer can accumulate ultrahigh‐density carriers not only on well‐defined channel (e.g., two‐dimensional surface) but also any irregularly shaped material. Here, thin films 95% pure metallic and semiconducting single‐walled carbon nanotubes (SWNTs), the Fermi level is continuously tuned over very wide range, while their electronic transport absorption spectra are simultaneously monitored. It found conductivity...

Photoluminescence (PL) from single-wall carbon nanotubes (SWCNTs) enables structural identification, but to derive the content rate of specific chirality species it is necessary know quantum yield each chirality. However, in PL SWCNTs, because Stokes shift small, photon reabsorption effect dominant and apparent spectral shape emission intensity are greatly modified depending on concentration. This problem makes quantitative identification SWCNTs by difficult. In this study, concentration...

High-harmonic generation (HHG), which is the of light with multiple optical harmonics, an unconventional nonlinear phenomenon beyond perturbation regime. HHG, was initially observed in gaseous media, has recently been demonstrated solid-state materials. Determining how to control such extreme phenomena a challenging subject. Here, we demonstrate HHG through tuning electronic structure and carrier injection using single-walled carbon nanotubes (SWCNTs). We reveal systematic changes...

Single-chirality separation of single-wall carbon nanotubes (SWCNTs) is important for taking advantage the inherent high performance SWCNTs. Mixed surfactant systems containing cholate derivatives have commonly been used single-chirality separation, but chirality selection resolution remains low. This study systematically investigates effect on in adsorption chromatography to improve resolution. Comparative experiments using seven reveal that results highly depend hydrophobicity derivative,...

In this paper, we report a method for the inkjet printing of single-walled carbon nanotube thin-film transistors (SWCNT TFTs). Although technology is powerful tool fabrication SWCNT TFTs, diameter ink droplets (100 μm) strictly limits device size. Here, surmount limitation by combining and site-selective deposition based on patterning self-assembled monolayers. We have synthesized patterned films with feature widths less than 100 μm using surface modification method, thus improving...

Although enantiomeric separation of single-wall carbon nanotubes is possible, their purity (EP) remains an issue due to a lack effective evaluation methods. In this work, we report the EP (6,5) nanotube enantiomers using flavin mononucleotide (FMN) as enantiomer-sensitive dispersant. The and (11,–5) were separated by gel column chromatography method dispersed in FMN aqueous solution. these solutions, showed E11 optical transitions at different wavelengths handedness-dependent interactions...

How the morphology of a macroscopic assembly nanoobjects affects its properties is long-standing question in nanomaterials science and engineering. Here, we examine how thermoelectric flexible thin film carbon nanotubes depend on nanotube alignment. Specifically, have investigated anisotropy Seebeck coefficient aligned gated single-wall films. We varied Fermi level wide range, covering both p-type n-type regimes, using electrolyte gating. While found electrical conductivity along alignment...

Recent demonstration of room temperature, telecommunication wavelength single photon generation by sp3 defects wall carbon nanotubes established these as a new class quantum materials. However, their practical utilization in development light sources calls for significant improvement imperfect yield (QY∼10-30%). PL intensity fluctuations observed with some also need to be eliminated. Aiming toward attaining fundamental understanding necessary addressing critical issues, we investigate...

Rolling two-dimensional (2D) materials into 1D nanotubes allows for greater functionality. Boron-nitride (BNNTs) can serve as insulating templates the coaxial growth of guest nanotubes, without interfering with property characterization. However, their application has been greatly hindered by poor dispersibility, inevitably resulting in formation thick bundles. Here we present facile preparation well-dispersed BNNT via surfactant dispersions and synthesis van der Waals heterostructures based...