Multiferroic composites were prepared by covering CoFe2O4 nanoparticles with a shell of BaTiO3 using sol–gel technique. Scanning probe microscopy confirmed the formation core–shell structure magnetic core and piezoelectric shell. The converse magnetoelectric effect was studied at different temperatures bias fields. coefficient peaks approximately 270 K reaches value αC≈(2.2 ± 0.1)10 − 11 s m 1, which surpasses those reported previously for similar structures. A change sign observed an...

Abstract A detailed survey on the processing of poly[2‐methoxy‐5‐(2′‐ethylhexyloxyl)–1,4‐phenylenevinylene] (MEH–PPV) solutions via ink‐jet printing and subsequent characterization resulting films is reported. The printability MEH–PPV dissolved in different solvents, with varied concentrations, studied. Limitations highly concentrated polymer are overcome by using ultrasonication. pattern formation lines explained relation to contact angle formed solution substrate interchain interactions....

Abstract Summary: We illustrate the ink‐jet printing of a thin‐film library donor/acceptor systems useful in bulk heterojunction solar cells and their characterization utilizing UV‐vis/fluorescence plate reader an optical profilometer. In addition, morphology films has been examined by atomic force microscopy (AFM). The processing technology allows arrays different compositions on one substrate as well subsequent fast screening electron transfer processes. investigated consist blends...

Photoembossing is a solvent-free photolithographic technique for the production of polymeric relief microstructures (see Figure). A combinatorial methodology to explore influence different parameters (e.g., processing temperature, binder content, photoinitiator content) on resultant structure presented using an acrylate-based model system. Results are discussed in framework diffusion-polymerization model.

Development of a fast and accurate pesticide analysis system is challenging task, as large amount commonly used has negative effects on humans' health. Detection residues crucial for food safety management environmental protection. Aptamers─short single-stranded oligonucleotides (RNA or DNA) selected by aptamer selection method SELEX─can selectively bind to their target molecules with high affinity. Thus, in the present study, we developed an electrochemical biosensor based aptamers detect...

We present the results of a temperature-dependent photoluminescence (PL) spectroscopy study on CuInS2 quantum dots (QDs). In order to elucidate influence QD size PL temperature dependence, size-selective precipitation was used obtain several nanoparticle fractions. Additionally, nanoparticles' morphology and chemical composition were studied using transmission electron microscopy, X-ray diffraction, photoelectron spectroscopy. The obtained QDs showed luminescence in visible-near infrared...

The study of cellular ion channels forms a basic understanding healthy organ functioning and the body as whole; however, native role signal transmission through between cells remains unclear. success investigation depends on methods materials used. Therefore, it is necessary to develop new approach system for studying detecting cell–cell communication. In this work, we suggest hydroxyapatite patterns demonstrating piezoresponse in conjunction with fiber-based biosensors detection electrical...

Surface of polyhydroxyalkanoate (PHA) films varying monomer compositions are analyzed using atomic force microscopy (AFM) and unsupervised machine learning (ML) algorithms to investigate classify based on global attributes such as the scan size, film thickness, type. The experiment provides benchmarked results for 12 most widely used clustering via a hybrid investigation approach while highlighting impact Fourier transform (FT) high-dimensional vectorized data classification various pools...

Surface modification of solid substrates with organic molecules and polyelectrolytes is a promising strategy toward advanced soft materials due to the control molecular arrangement supramolecular organization; however, understanding nature interactions within assembly challenging. Here facile approach architecture calixarene macrocycles on surfaces presented through interplay weak involving silicon substrate, cationic polyelectrolyte layer, anionic sulfonatothiacalix[4]arene (STCA)....

A synthesis protocol of polyvinylpyrrolidone-capped AgInS2 quantum dots in aqueous solution is reported. Nanoparticle morphology and chemical composition were studied by means TEM, XRD, XPS, FTIR. The obtained luminescent the visible range. photoluminescence intensity dependence on polyvinylpyrrolidone amount was demonstrated. wavelength emission maximum varied with changing [Ag]:[In] molar ratio. temperature investigated within range 11–294 K.

Abstract Summary: On the basis of terpyridine functionalized poly(ethylene oxide) (PEO) and poly(styrene) (PS), a series light‐emitting iridium(III) compounds was effectively synthesized. The respective target were prepared by grafting chloro‐bridged precursor complexes [Ir(ppy) 2 ‐ μ ‐Cl] (ppy = phenylpyridine) [Ir(ppy‐CHO) (ppy‐CHO 4‐(2‐pyridyl)benzaldehyde) onto PEO PS tails. 1D 2D NMR characterization performed revealing expected resonances. Gel permeation chromatography (GPC) proved...

The surface roughness of layer-by-layer (LbL) polyelectrolytes is studied by atomic force microscopy (AFM) and analyzed with novel methods including topological data analysis (TDA) machine learning (ML) to correlate multiscale the number bilayers recognize types (PEs). LbL PEs composed one four (1) polyethylenimine (PEI)/poly(sodium 4-styrenesulfonate) (PSS), (2) PEI/poly(acrylic acid) (PAA), (3) PEI/MXene rigid flakes are deposited on a smooth silicon wafer. With growing bilayers, changes...

A methodology for the rapid design, screening, and optimization of coating systems with surface relief structures, using a combination statistical experimental high-throughput experimentation, data mining, graphical mathematical routines was developed. The applied to photopolymers used in photoembossing applications. library 72 films prepared by dispensing given amount sample onto chemically patterned substrate consisting hydrophilic areas separated fluorinated hydrophobic barriers. Film...

Methodologies for the rapid screening of coating systems were developed and applied to photopolymer lacquers photoembossing applications. Continuous discrete gradient libraries prepared with a in grating period along short axis long axis, exposure energy, development temperature, film thickness, photoinitiator concentration, or monomer polymer mass ratio. Discrete consisted arrays rectangular films made by pipetting certain amount sample onto chemically patterned substrate consisting...

Polished brass alloy plate samples were treated by ultrasound in an alkaline buffer at different concentrations and sonication amplitudes. Sample topography was studied atomic force microscopy processed algorithms of topological data analysis. Persistence diagrams, barcodes, autocorrelation functions, spatial distribution heights (min–max regions) constructed. The isotropy/anisotropy the surface, level roughness, grain size analyzed for all samples. with various sizes can be useful as...

Today, air pollution is a global environmental problem. A huge amount of explosive and combustible gas emissions that negatively affect nature human health. Gas sensors are one the ways to prevent this impact. Several types have been developed, but main problem with them high operating temperature. This leads decrease in reproducibility stability over time. The aim work synthesize zinc stannate nanoparticles, study their phase composition, modify structure silver nanoparticles improve...

Adhesion-promoting linkers: Block copolymers hold promise for their application in improving the properties of substrates. Copper-coated scanning force microscopy tips (see figure) can be used to investigate adhesion differences two model copolymers: poly(styrene-co-acrylonitrile) and poly(styrene-alt-maleic anhydride) (SAN SMAh). Adhesion are analyzed by spectroscopy macroscopic pull-off tests.

The nanoscale topographic features of surfaces, such as vertical, lateral, and multiscale structures, are essential for understanding identifying correlations with properties in various applications. These critical applications ranging from biomedical devices to electronic components, they play a significant role determining the functionality these systems. Despite capabilities traditional surface analysis methods, which rely on standard vertical profile area measurements, techniques often...