Printed organic and inorganic electronics continue to be of large interest for sensors, bioelectronics, security applications. Many printing techniques have been investigated, albeit often with typical minimum feature sizes in the tens micrometer range requiring post-processing procedures at elevated temperatures enhance performance functional materials. Herein, we introduce laser three different inks, semiconductor ZnO metals Pt Ag, as a facile process fabricating printed electronic devices...

Wet-chemical discrimination of amino acids is still a challenge due to their structural similarity. Here, an optimized self-assembled eight-member sensor array reported. The stems from the combination elements different tongues, containing poly(para-phenyleneethynylene)s (PPE) and supercharged green fluorescent protein (GFP) variant. responsivity dyes (PPEs GFP) enhanced in that contain adjuvants, such as metal salts but also cucurbit[7]uril (CB[7]) acridine orange; suitable robust eight...

This study explores the mechanisms of photoactivation and radical formation during 3D laser printing using photoresists with a DETC photoinitiator. The role in high triplet states polymerization is revealed.

Most light-based 3D printing methods rely on optical or chemical nonlinearities to spatially confine the polymerization reaction. In micro- and nanoprinting, this nonlinearity can be provided by two-photon absorption, which describes simultaneous absorption of two photons. To achieve comparable cross sections for as in one-photon short intense laser pulses with intensities range 1 TW/cm2 are typically required. Herein, we review three emerging excitation processes that provide a quadratic...

Abstract Recent studies have opened the door to a new generation of photoinitiators for 3D laser nanoprinting. Therein, simultaneous absorption two photons, commonly referred as two‐photon absorption, is replaced by sequential photons in consecutive one‐photon processes. This process has been termed two‐step absorption. Importantly, can be accomplished inexpensive compact low‐power continuous‐wave blue diodes instead femtosecond systems red spectral region. Red‐shifting second step with...

We report the development of a two-component probe system as fluorescence turn-on assay simple saccharides. The quenching an anionic conjugated water-soluble polymer by cationic quencher has been reported previously. Three different boronic acid functionalized benzyl viologens and three polymers poly(aryleneethynylene) type form nine non-fluorescent complexes. This small library discriminates saccharides in aqueous solutions displacement assay. can be discriminated identified with this system.

Polycyclic aromatic hydrocarbons (PAHs) are persistent contaminants in the environment. Several of them have carcinogenic properties. There is considerable interest their sensitive low-cost detection and monitoring. We present a simple paper-based microfluidic sensor for rapid PAHs. Craft punch patterning generated multiple zones inhabited by fluorescent poly(arylene ethynylene)s (PAEs). Changes fluorescence image and/or intensity array were recorded using smartphone camera. The RGB color...

Abstract We report a cross‐reactive sensor array, combining two‐component probe system based upon three viologen substituted boronic acids and poly(aryleneethynylene) (PAE) an additional number of simple PAEs alone. This combined discriminates 27 different honeys in aqueous solution, according to patterns fluorescence intensity modulation, using linear discriminant analysis for data processing. The turn‐on array detects saccharide composition, while the discriminate trace colored components honeys.

Abstract Three stable N,N’ ‐diarylated dihydroazaacene radical cations were prepared by oxidation of neutral dihydroazaacenes synthesized via palladium‐catalyzed Buchwald‐Hartwig aminations aryl iodides with ‐dihydroazaacenes. Both as well oxidized species investigated UV‐vis spectroscopy, single crystal analysis, and DFT calculations. All the are surprisingly stable—their absorption spectra in dichloromethane remain unchanged ambient conditions for at least 24 hours.

Fluorescent, water-soluble poly(p-aryleneethynylene)s (PAE) were immobilized on commercially available nylon membranes by using a slot plotter, creating fluorescent, barcode-like sensor strips. Digital imaging standard digital camera, before and after immersion of the strips in buffers different pH, displays unique color for each pH value. Statistical evaluation, multivariate analysis variance (MANOVA) principal component (PCA), acquired data revealed that PAEs are superior to identical...

Dipolar 2,3-difluorobenzene units are introduced into the backbone of a poly(para-phenyleneethynylene) (PPE) to generate ferroelectric conjugated polymer. The structural features partially fluorinated PPE allow for generation remanent polarization in solid state; difluorinated benzene rings behave as molecular rotors at high temperature, while room stacking such clamps down ring orientation. dipoles can still be oriented by moderate external electrical fields and this is then ferroelectric....

Multi-core <bold>TIPSTAP</bold>-constructs of different dimensionality were created <italic>via</italic> “geometrization” the monomeric, highly crystalline parent using alkyne linkers.

Electron beam lithography patterns selectively cinnamate-substituted polythiophene thin films via [2+2]-cycloaddition. A nanoscale organic field effect transistor is constructed using cross-linked and doped as electrodes.

A dearomatization/aromatization strategy accesses the tetrahedral (crosslike) pentacene tetramer (tetrakis(4-((6,13-bis(TIPS-ethynyl)pentacen-2-yl)ethynyl)phenyl)silane). This molecular caltrop and one of its derivatives form amorphous thin films, demonstrating impact 3D-tetramerization on bulk morphology otherwise crystalline TIPS-pentacene.

<title>Abstract</title> The performance of a photoinitiator is key to control efficiency and resolution in 3D laser nanoprinting. Upon light absorption, cascade competing excited states photoreactions leads the radical formation that initiates free polymerization. Here we investigate 7-diethylamino-3-thenoylcoumarin (DETC), one most efficient photoinitiators for two-photon polymerization (TPP). Depending on presence co-initiator, DETC causes generation either with or unique three-photon...

Abstract Printed organic and inorganic electronics continue to be of large interest for sensors, bioelectronics, security applications. Many printing techniques have been investigated, albeit often with typical minimum feature sizes in the tens micrometer range requiring post-processing procedures at elevated temperatures enhance performance functional materials. Herein, we introduce laser semiconductor ZnO metals Pt Ag by laser-induced hydrothermal synthesis multi-photon reduction,...

Abstract Dipolar 2,3‐difluorobenzene units are introduced into the backbone of a poly( para ‐phenyleneethynylene) (PPE) to generate ferroelectric conjugated polymer. The structural features partially fluorinated PPE allow for generation remanent polarization in solid state; difluorinated benzene rings behave as molecular rotors at high temperature, while room stacking such clamps down ring orientation. dipoles can still be oriented by moderate external electrical fields and this is then...

The fabrication of electronic, photonic, and metamaterial-based devices, or tissue engineering requires the controlled deposition patterning materials. Electron-beam lithography (EBL) offers unprecedented miniaturization those devices because its high resolution. We present a concept to induce classic photochemical reaction in condensed matter via EBL. investigate response tetrameric cinnamate monomer thin films toward photon electron radiation. In solid state, photoexcitation bombardment...