Organic light‐emitting diodes (OLEDs) able to directly emit circularly polarized (CP) electroluminescence (CP‐OLEDs) are rapidly gaining much interest, due their possible applications in displays with antiglare filters and 3D displays. Development of more efficient CP‐OLEDs can open use also point‐of‐care personalized diagnostic tools, since CP light alteration be related health state irradiated tissues. In this work it is shown that the performance chiral europium complex‐based improved...

This article provides insight into the interaction of synthetic conjugated polymers [polyfluorene derivatives (PFDs)] with layers two-dimensional titanium carbide (Ti3C2Tx). Three nonpolar, polar, and charged nitrogen-containing functionalities were synthesized via Suzuki polycondensation reaction. The organic–inorganic PFD/Ti3C2Tx hybrids prepared characterized using X-ray diffraction a range microscopic spectroscopic techniques to elucidate host–guest mechanism. We show that polar ends...

We describe the preparation of a compound whose molecules consist two metal sandwich stands carrying tentacles with affinity to surfaces and holding an axle that carries dipolar or nonpolar rotator. The rotor exists as three pairs enantiomers, rapidly interconverting at room temperature. When mounted on gold surface, each molecule represents chiral altitudinal rotor, rotator parallel surface. surface-mounted are characterized by several spectroscopic imaging techniques. At any one time, in...

This paper reports a simple and economical method for the fabrication of nanopatterned optical fiber nanotips. The proposed patterning approach relies on use nanosphere lithography end facet. Polystyrene (PS) nanospheres are initially self-assembled in hexagonal array surface water. created pattern is then transferred onto an tip (OFT). PS monolayer colloidal crystal OFT basic building block that used to obtain different periodic structures by applying further treatment fiber, such as metal...

Colloidal nanoplatelets (NPLs), owing to their efficient and narrow-band luminescence, are considered as promising candidates for solution-processable light-emitting diodes (LEDs) with ultrahigh color purity. To date, however, the record efficiencies of NPL-LEDs significantly lower than those more-investigated devices based on spherical nanocrystals. This is particularly true red-emitting NPL-LEDs, best-reported external quantum efficiency (EQE) which limited 0.63% (EQE = 5% green NPL-LEDs)....

Polariton condensation in the yellow part of visible spectrum from a planar organic semiconductor microcavity containing molecular dye bromine‐substituted boron‐dipyrromethene is observed. This study provides experimental fingerprint polariton under nonresonant optical excitation, including nonlinear dependence emission intensity and wavelength blueshift with increasing excitation density, single pulse dispersion imaging, real space interferometry. The latter two allow to visualize collapse...

We report broadband and quasi-omnidirectional antireflective (AR) structures inspired to the nipple arrays of moth eyes. These nanocoatings, based on thin elastomeric films, are prepared by simple self-assembly processing a co-polymer specifically designed this purpose, PDMS replica molding. Typically, their surface is covered compact distribution hemispherical nanodomes about 250 nm in diameter 100 height. When these novel nanostructures applied single glass surface, maximum 2% transmission...

The optical properties of a series strongly coupled microcavities containing the fluorescent molecular dye BODIPY‐Br (bromine‐substituted boron‐dipyrromethene) dispersed into transparent dielectric matrix are explored, with each cavity having different exciton–photon detuning. Using temperature dependent emission, time‐resolved spectroscopy, white‐light reflectivity, and measurements fluorescence quantum yield, population polaritons is explored along lower polariton branch. It found that...

We report on the photophysical characterization of two solution-processable red-emissive perylene diimide molecules and their use in fully solution assembled OLEDs.

Colloidal quantum dots (QDs) are emerging as true candidates for light-emitting diodes with ultrasaturated colors. Here, we combine CdSe/CdS dot-in-rod heterostructures and polar/polyelectrolytic conjugated polymers to demonstrate the first example of fully solution-based dot (QD-LEDs) incorporating all-organic injection/transport layers high brightness, very limited roll-off external efficiency 6.1%, which is 20 times higher than record QD-LEDs all-solution-processed organic interlayers...

In this paper we report on the engineering of repeatable surface enhanced Raman scattering (SERS) optical fiber sensor devices (optrodes), as realized through nanosphere lithography. The Lab-on-Fiber SERS optrode consists polystyrene nanospheres in a close-packed arrays configuration covered by thin film gold tip. surfaces were fabricated using lithography approach that is already demonstrated able to produce highly patterns order engineer and optimize probes, first evaluated compared...

We propose a novel fabrication process to realize optical sensing probes based on metal–dielectric crystals self-assembled an fiber tip. The breath figure methodology has been adapted work directly nonconventional substrates, such as fibers, enabling the formation of regular and ordered metallo-dielectric tips. Accurate morphological characterization was carried out qualify process. reported results indicate that proposed technique provides method for rapid cost-effective prototyping...

We developed an immunoassay platform for the detection of human Thyroglobulin (Tg) to be integrated with fine-needle aspiration biopsy early lymph node metastases in thyroid cancer patients. The sensing detects Tg by a sandwich involving self-assembled surface-enhanced Raman scattering (SERS) substrate assisted functionalized gold nanoparticles that provide additional signal amplification and improved molecular specificity. Specifically, SERS-active substrates were Capture antibodies...

Silk produced by the silkworm Bombyx mori has gained a second youth as sustainable material for high-technology applications. Here, we report simple and cost-effective fabrication technique which allows preparation of free-standing micropatterned pure protein films under ambient processing conditions. In this view, take advantage auto organization polymers in microporous films—the so-called breath figure formation—to create specific morphology, is then transferred to silk. The method...

The fluorinated phenylene unit is used as a building block for an all-conjugated fluorene-based alternating copolymer (PFO–TFP). synthesis, carried out by optimized Suzuki cross-coupling, produces extremely high purity compound with series of intriguing properties. Firstly, blue-shift the absorption and emission spectra respect to parent polymer achieved. Secondly, photoluminescence (PL) quantum yields (QYs) solution, 68%, are surprisingly retained in solid-state. Finally, improved colour...

Crack-templated thin films, inspired by naturally occurring patterns such as leaf venation, spider webs, and the networked structure of dried egg white, represent a paradigm shift in design functional materials. Traditionally, cracks coatings are seen defects to be avoided due their potential compromise mechanical integrity performance. However, this context, deliberately induced meticulously controlled serve templates for versatile applications. This review explores latest advances...

Two simple approaches to build up micropatterned functionalized polymer films are reported here. Both of them based on the formation porous consisting two-dimensionally ordered void structures, produced by evaporation a solution in presence humidity. In first approach, we utilize an amino-terminated linear polystyrene fabricate honeycomb structured which cavities enriched with amino groups that preserve their chemical reactivity. This allows, principle, obtain different surface functionality...

Hybrid interfaces between living cells and nano/microstructured scaffolds have huge application potential in biotechnology, spanning from regenerative medicine stem cell therapies to localized drug delivery biosensing tissue engineering neural computing. However, 3D architectures based on semiconducting polymers, endowed with responsivity visible light, never been considered. Here, we apply for the first time a push-coating technique realize high aspect ratio polymeric pillars,...