Novel transport phenomena through nanopores are expected to emerge as their diameters approach subnanometer scales. However, it has been challenging explore such a regime experimentally. Here, this study reports on polymer pores exhibiting unique selective ionic transport. 12 μm long, parallel oriented fabricated in polyethylene terephthalate (PET) films by irradiation with GeV heavy ions and subsequent 3 h exposure UV radiation. These show selectivity spanning more than 6 orders of...

Abstract Layered graphene oxide membranes (GOM) with densely packed sub-nanometer-wide lamellar channels show exceptional ionic and molecular transport properties. Mass charge in existing materials follows their concentration gradient, whereas attaining anti-gradient transport, also called active remains a great challenge. Here, we demonstrate coupled photon-electron-ion phenomenon through the GOM. Upon asymmetric light illumination, cations are able to move thermodynamically uphill over...

Abstract Nanopores in ultrathin or atomically thin membranes attract broad interest because the infinitesimal pore depth allows selective transport of ions and molecules with ultimate permeability. Toward large‐scale osmotic energy conversion, great challenges remain extrapolating promising single‐pore demonstration to really powerful macroscopic applications. Herein, origin ion nanopores is systematically investigated. Based on a precise Poisson Nernst–Planck model calculation, it found...

Nanofluidic ion transport in nacre-like 2D layered materials attracts broad research interest due to subnanometer confined space and versatile surface chemistry for precisely ionic sieving ultrafast water permeation. Currently, most of the 2D-material-based nanofluidic systems are homogeneous, investigations proton conduction therein restricted symmetric behaviors. It remains a great challenge endow with asymmetric characteristics adaptive responsibilities. Herein, we report phenomena...

Abstract Biological electrogenic systems use protein‐based ionic pumps to move salt ions uphill across a cell membrane accumulate an ion concentration gradient from the equilibrium physiological environment. Toward high‐performance and robust artificial electric organs, attaining antigradient transport mode by fully abiotic materials remains great challenge. Herein, light‐driven proton pump phenomenon through Janus graphene oxide (JGOM) is reported. The JGOM fabricated sequential deposition...

Abstract Layered graphene oxide membranes (GOMs) offer a unique platform for precise sieving of small ions and molecules due to controlled sub‐nanometer‐wide interlayer distance versatile surface chemistry. Pristine chemically modified GOMs effectively block organic dyes nanoparticles, but fail exclude smaller with hydrated diameters less than 9 Å. Toward inorganic salt ions, number strategies are proposed by reducing the spacing down merely several angstroms. However, one critical challenge...

Abstract The unique feature of nacre‐like 2D layered materials provides a facile, yet highly efficient way to modulate the transmembrane ion transport from two orthogonal directions, either vertical or horizontal. Recently, light‐driven active ionic species in synthetic nanofluidic systems attracts broad research interest. Herein, taking advantage photoelectric semiconducting properties transition metal dichalcogenides, generation directional and greatly enhanced cationic flow through WS 2...

Abstract Supported 2D layered materials are widely used in gas separation, water treatment, energy conversion, etc. In conventional viewpoint, the atop membrane functions as an active layer for mass or charge separation vapor liquid phase, while substrate membrane, containing aligned tortuous 1D micro nanoscaled fluidic channels, a mechanical support. However, asymmetric transport property induced by mixed‐dimensional composite structure is equally very important, yet long‐overlooked element...

Mechanical properties of cells and extracellular matrix (ECM) play important roles in many biological processes including stem cell differentiation, tumor formation, wound healing. Changes stiffness ECM are often signs changes physiology or diseases tissues. Hence, is an index to evaluate the status cultures. Among multitude methods applied measure tissues, micro-indentation using Atomic Force Microscope (AFM) provides a way reliably living cells. This method has been widely characterize...

Summary of main observation and conclusion Osmotic power generated by mixing ionic solutions different concentration is an underutilized clean energy resource that satisfy potentially the ever‐growing demand. For decades, substantial efforts are made to enhance density. Toward this goal, we once developed a heterogeneous nanoporous membrane comprising heterojunctions between negatively charged mesoporous carbon positively macroporous alumina harvest electric from salinity difference achieved...

Abstract Heterogeneous structures in nacre‐mimetic 2D layered materials generate novel transport phenomena angstrom range, and thus provide new possibilities for innovative applications sustainable energy, a clean environment, human healthcare. In the two orthogonal directions, either vertical or horizontal, heterostructures horizontal direction have never been reported before. Here, 2D‐material‐based laterally heterogeneous membrane is fabricated via an unconventional dual‐flow filtration...

Surfactants, which are widely used in skin care products and cleansers, can cause irritation. The irritation potential of surfactants is fundamentally determined by their molecular structure directly related to microscopic aggregation specific interactions with the skin. origin remains unknown. In this work, properties four surfactant solutions were measured, behavior was systematically analyzed. results indicate that self-assembled aqueous solution form aggregates different morphologies,...

A polymeric nanopore membrane with selective ionic transport has been proposed as a potential device to convert the chemical energy in salinity gradients electrical power. However, its conversion efficiency and power density are often limited due challenge reliably controlling size of nanopores conventional etching method. Here we report that without etching, polyimide (PI) membranes irradiated GeV heavy ions have negatively charged nanopores, showing nearly perfect selectivity for cations...

Abstract Fiber‐shaped supercapacitors (FSSCs) are expected to motivate the development of wearable electronics. However, their high cost and complex operations limit industrial production. Herein, commercial sewing threads utilized as fiber substrates prepare FSSCs via facile methods. The become conductive after poly(3,4‐ethylenedioxythiophene) (PEDOT) uniformly grew on porous surface by in situ polymerization vacuum‐deposited 2,5‐dibromo‐3,4‐ethylenedioxythiophene. Then, MnO 2 nanoflakes...

Wastewater from the printing and dyeing industry is an area of growing concern. Photocatalysts synthesized using polyaniline (PANI) certain metal oxides have been increasingly used for purpose owing to their high photocatalytic potential, ease synthesis, recycle reuse. Herein, a ternary composite α-SiW11Cr/PANI/ZnO was prepared by electrostatic self-assembly, characterized infrared (IR) spectroscopy, diffraction X-rays, scanning electron microscopy, etc. N2 adsorption-desorption showed that...

Polymer nanopores have great potential for ultrafiltration, desalination, and energy conversion because of their robustness, flexibility, efficiency in large-scale production. Yet a challenge controlling the size to subnanometer limits performance. F. Liu, Y. Wang, co-workers describe on page 5796, generation negatively charged polymer pores that exhibit ultra-high ionic transport selectivity unique order as Li+>Na+>K+>Cs+≫Mg2+>Ca2+>Ba2+≫blocked heavy metal ions anions.

Polyethylene terephthalate (PET) films in thickness of 12 μm are irradiated by Xe and Au ions at the energies 9.5 11.4MeV/u with ion fluence from 5 × 109 cm−2 to 1 1011 cm−2. After irradiation, ultra-violet lights used illuminate samples latent tracks wavelength 365 nm flux density 4.2 mW/cm−2. UV-irradiation effects on tracked PET investigated UV-vis spectrum positron annihilation lifetime spectroscopy (PALS). It is found that carbonaceous clusters generated irradiation decomposed UV...

Dodecylbenzenesulfonic acid (DBSA) doped polypanilines (PANIs) were chemically synthesized in different molar ratios of aniline (An) to ammonium persulfate (APS) and An DBSA. The microstructures these PANIs investigated by means scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier Transform Infrared (FTIR). UV-Vis spectrometer, semiconductor parameter analyzer, ubbelohde viscometer electrospinning technique used characterize the optical, electrical properties, viscosity...

Using heteropoly tungstate β2-K8SiW11O39•xH2O as the active component, was loaded on PANI/TiO2 by dipping method to prepare a composite photo-catalyst β2-SiW11/PANI/TiO2. The new ternary material, β2-SiW11/PANI/TiO2, characterized IR, UV, TG, XPS, XRD and SEM. Meanwhile, degradation of methylene blue solution used probe reaction evaluate photo-catalytic performance effect pH amount material activity investigated. Compared with TiO2 silicate, β2-SiW11/PANI/TiO2 exhibited enhanced due synergic...

A new triterpenoid saponin acylated with monoterpenic acid, together two known saponins, has been isolated from the fruit of Gymnocladus chinensis Baill. Their structures were elucidated as 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[3-O-(β-D-glucopyranosyl)-4-O-((6S)-2-trans-2,6-dimethyl-6-hydroxy-2,7-octadienoyl)-β-L-arabinopyranosyl]-2,7-octadienoyl}-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 4)-α-L-rhamnopyranosyl-(1...

Micro/nano-structural polyaniline materials were prepared by using thin glass tubes as template in the presence of β2-SiW11Mn and ammonium persulfate, which used dopant oxidant, respectively, this system. The characterized IR, UV-Vis, XRD, TG-DTA SEM techniques. photocatalytic performance polyaniline, β2-SiW11Mn/PANI composite obtained was investigated photodegradation crystal violet model reaction. results showed that activity much higher than due to a synergy between two. degradation rate 91.19%.

Two new triterpenoid saponins acylated with monoterpenic acid, 2β,23-dihydroxy-3-O-α-L-rhamnopyranosyl-21-O-{(6S)-2-trans-2,6-dimethyl-6-O-[3-O-(β-D-glucopyranosyl)-4-O-(2-methylbutanoyl)-β-L-arabinopyranosyl]-2,7-octadienoyl)-acacic acid 28-O-β-D-xylopyranosyl-(1 → 3)-β-D-xylopyranosyl-(1 4)-[β-D-glucopyranosyl-(1 3)]-α-L-rhamnopyranosyl-(1 2)-[α-L-rhamnopyranosyl-(1 6)]-β-D-glucopyranosyl ester and...