In this study, we fabricated metal halide perovskite MAPbI 3 -based resistive gas sensors and investigated their performance for NH detection under exposure to light with different wavelengths. Under illumination,...

Simultaneous sensing of multiple gases by a single fluorescent-based gas sensor is utmost importance for practical applications. Such strongly hindered cross-sensitivity effects. In this study, we propose novel analysis method to ameliorate such hindrance. The trial used here was fabricated coating platinum(II) meso-tetrakis(pentafluorophenyl)porphyrin (PtTFPP) and eosin-Y dye molecules on both sides filter paper O2 NH3 simultaneously. fluorescent peak intensities the dyes can be quenched...

Surface-enhanced Raman scattering (SERS) has been widely used to effectively detect various biological and organic molecules. This detection method needs analytes adsorbed onto a specific metal nanostructure, e.g., Ag-nanoparticles. A substrate containing such structure (called SERS substrate) is user-friendly for people implementing the adsorption subsequent detection. Here, we report on powerful substrates based efficient fabrication of Ag-filled anodic aluminum oxide (AAO) films. The...

High EQE of 18.01% and radiance 366.76 W sr −1 m −2 were achieved by simply controlling the thickness uncommon exciplex electron acceptor 3′,3′′′,3′′′′′-(1,3,5-triazine-2,4,6-triyl) tris(([1,1′-biphenyl]-3-carbonitrile)) (CN-T2T) as alternate transport layer for MAPbI 3 perovskite LED.

A lithographic process based on focused ion beam bombardment is developed for selectively closing and opening nanochannels a porous anodic alumina film. This resist-free the use of beams with different energies that strike balance between material sputtering relocation. used to grow nanowire patterns elements.

Abstract Porous anodic alumina oxide (AAO) is one of the most commonly used nanotemplates for growing arrays nanoparticles, nanowires, nanocomposites, and nanoarchitectures because its pores, which are a very uniform size, can grow longitudinally into self‐aligned nanochannels with an extremely high aspect ratio. Furthermore, under specific combinations anodization voltage electrolyte, lateral positions self‐organize two‐dimensional hexagonally close‐packed lattices domain sizes on order few...

The first all-vacuum deposition for fabricating perovskite-based substrates surface-enhanced Raman scattering (SERS) is reported.

Sensitivity is one of the crucial factors in determining quality a fluorescence/phosphorescence-based gas sensor, and estimated from measurement responses (I0/I, where I0 I refer to measured optical intensity sensor absence presence analyte molecules) at various concentrations analytes. In this work, we demonstrate phosphorescence-based oxygen sensors fabricated on highly porous anodic aluminum oxide (AAO) membranes showing dramatically high response. These exploit enormous surface area AAO...

Arrays of nanowires with identical length are fabricated by using ultrasound to remove the fluctuation among nanowires, which deliberately grown in burette-shaped nanochannels on an anodic anumina film. The process allows fabrication 10 micron Ag-nanowire arrays as small 0.09%. By integrating a focused-ion-beam-based lithographic method grow into selective array, we fabricate uniform-length that arranged custom-designed lateral geometry. ability such artificial nanomaterials paves way for...

Anodization of tungsten in NaOH leads to the growth a porous oxide layer with either irregular trenches or isolated nanobubbles. For anodic potentials between 30 40 V and concentrations 2–3 M, nanobubbles diameters ∼40 nm form spontaneously self-organize into hexagonal close-packed ordered arrays period ∼60 nm. The are likely be initiated by electrostatic stress on film that could become more plastic under influence high-density current. arrangement manifests delicate balance their surrounding walls.

Sputter-deposited V-doped SrZrO3 (SZO) films were deposited on textured LaNiO3 (LNO) bottom electrodes to investigate the resistance switching properties and reliabilities. The microstructures of SZO LNO characterized by x-ray diffraction. Al/V-doped SZO/LNO sandwich structures can be reversibly switched operating with dc bias voltages or voltage pulses. device [100] orientated film had better ratio was more than 1000. effect thermal treatment investigated different behaviour two...

The in situ monitoring of dynamic covalent macromolecular boronate esters represents a difficult task. In this report, we present an method using fluoride coordination and 11B NMR spectroscopy to determine the amount mixture boronic acids cis-diols. With coordination, acid afforded trifluoroborate fluoroboronate esters, giving identical resonances at 3 9 ppm spectra. same titration did not alter resonance amine-coordinated which gave 14 Therefore, acids, three resonances, ratio each...

Focused ion beam lithography and a two-step anodization have been combined to fabricate vertical fan-out platform containing an array of unique probes. Each probe comprises three anodic alumina nanochannels with arrangement. The is used pattern aluminum sheet custom-designed triangular 'cells' whose apexes are composed nanoholes. nanoholes grow into straight under proper voltage in the first-step anodization. second step uses doubled induce lateral repulsion among nanochannels' growth fronts...

Effects and mechanisms of conductivity variation chemically vapor deposited single-layer graphene covering silver nanoparticles on SiO(2)/Si are reported based blue-light (405 nm) induced plasmonic coupling electrical current annealing desorption surface adsorbates. With 1V applied voltage, photoconductivity is positive except a brief negative period when the first illuminated by light. At 10 mV persists for hours. In comparison, pristine tens When voltage increased to 1V, it takes hours...

Tip-enhanced Raman spectroscopy with a spatial resolution of 25 nm is conducted on sample graphite that has been exposed to 50 keV focused Ga ion beam diameter 20 nm. The G mode located at 1579 cm(-1) does not exhibit measurable tip enhancement, while the D 1364 significantly enhanced. A method proposed calculate enhancement factor anisotropic materials due electromagnetic field using measured signal induced by tip.

We demonstrate a process to selectively tune the pore size of an individual nanochannel in array high-aspect-ratio anodic aluminum oxide (AAO) nanochannels which sizes were originally uniform. This novel enables us fabricate arrays AAO variable arranged any custom-designed geometry. The is based on our ability close by using focused ion beam (FIB) sputtering, leads redeposition sputtered material and closure with capping layer thickness depending energy FIB. When such partially capped etched...

Porous anodic aluminum oxide (AAO) membranes have been widely used as templates for growing nanomaterials because of their ordered nanochannel arrays with high aspect ratio and uniform pore diameter. However, the intrinsic growth behavior an individual AAO has never carefully studied lack a means to fabricate single isolated alumina (SIAAN). In this study, we develop lithographic method fabricating SIAAN, which grows into porous hemispherical structure its pores exhibiting fascinating...

The electromagnetic enhancement factor (M) of a plasmonic nanostructure is the crucial quantity that characterizes its enhanced optical effect. Retrieving it experimentally however stymied by uncontrollable nuances in nanometer scale and lack method to gauge local field. We propose determine structure with narrow gaps between adjacent metal nanoparticles—hot spots—by exciting nanoparticles using light pulse assess their temperature rise simultaneously generated inelastic scattering radiation...

A novel low-stress process for transferring thermal CVD single-layer graphene from copper foils to destination substrates is demonstrated. Electrical and optical characteristics of as-transferred the hydrogen remote-plasma modified are presented. Although mechanically very strong considering its atomically thin structure, large-area practically fragile especially during handling transfer one substrate another. Handling free-standing even more challenging. Combination effective surface...

The (Ba 0.6 ,Sr 0.4 )TiO 3 (BST) thin films were deposited on the Pt bottom electrode (Pt/Ti/SiO 2 /Si) by radio frequency magnetron sputter. After that, a 100 nm-thick film was electron beam evaporator as top to form metal/insulator/metal (MIM) structure. capacitance-voltage characteristics recorded study voltage-controlled capacitance. dispersion found in measurements of capacitance and loss tangent. reason should be parasitic effect series resistance inductance. simulations four-element...

Perovskite quantum dots (PQDs) offer potential for gas sensing, though stability limits use. Johan et al . enhanced PQD with a horizontally aligned anodic alumina oxide template, maintaining fluorescence 3 weeks without change.