We investigated the electrical and mechanical stability of flexible 6,13-bis (triisopropylsilylehtynyl)pentacene (TIPS-pentacene) thin-film transistors (TFTs) that were fabricated on polyimide (PI) substrates using cross-linked poly(4-vinylphenol) (c-PVP) and c-PVP/yttrium oxide (Y2O3) nanocomposite films as gate insulators. Compared with the electrical characteristics of TIPS-pentacene TFTs wi...

Zinc oxide quantum dots (ZnO QDs) are nanoparticles of purified powdered ZnO. These were evaluated for antimicrobial activity against Listeria monocytogenes, Salmonella Enteritidis, and Escherichia coli O157:H7. The ZnO QDs were utilized as a powder, bound in a polystyrene film (ZnO-PS), or suspended in a polyvinylprolidone gel (ZnO-PVP). Bacteria cultures were inoculated into culture media or ...

A large proportion of hospital-related infections are acquired and spread due to the direct contacts between patients and healthcare workers. Accordingly, proper infection prevention measures, and especially hand hygiene, are key to limit the spread of infections in nosocomial settings. However, healthcare workers frequently experience difficulties in complying strictly to hand disinfection pro...

When properly packed in the solid state, diacetylene monomers can be topochemically polymerized into polydiacetylene by UV, γ, or strong X-ray irradiation. Usually, colorless diacetylene crystals turn into blue polydiacetylene crystals, which often undergo an irreversible “blue-to-red” colorimetric transition when environmental stimuli are applied. Although this unique transition has found many...

Purpose To investigate the correlation between the changes in the ocular surface temperature (OST) and tear film stability over soft contact lenses (SCLs). Methods We enrolled 20 eyes of 20 normal SCL wearers (20 men; 24.4 ± 4.1 years). We used four different daily disposable SCLs: one silicone hydrogel lens (delefilcon A) and three hydrogel lenses (etafilcon A with polyvinylpyrrolidone [PVP]...

We investigated the electrical stabilities of two types of pentacene-based organic thin-film transistors (OTFTs) with two different polymeric dielectrics: polystyrene (PS) and poly(4-vinyl phenol) (PVP), in terms of the interfacial charge depletion. Under a short-term bias stress condition, the OTFT with the PVP layer showed a substantial increase in the drain current and a positive shift of th...

In this study, povidone-iodine (PVP-I) has been formulated as a topical spray to produce a thin film for the controlled release of I2. By means of experimental design, 27 formulations containing glycerol, ethanol, PEG 400, copovidone and HFA 134a as a propellant were prepared. The pH values of all formulations were in the range of 6-7. The viscosity was within the range of 11.9-85.9 mPa s. The ...

Transdermal delivery of ondansetron hydrochloride is one of the promising ways to maximize the therapy in contrast to oral delivery. Current investigation efforts are focused in formulating the ondansetron hydrochloride matrix-type transdermal film by incorporating hydrophilic and hydrophobic polymers. In this study, ondansetron hydrochloride transdermal films were prepared using solvent evapor...

In this research, the influences of addition PVP to PVDF-HFP polymers and preparation thin films using a solvent casting method were studied. The polymer blend PVDF-HFP/PVP with nanostructured surface investigated scanning electron microscopy, differential calorimetry, nanoindentation, dielectric spectroscopy. results showed that formed dispersed phase (the poorer conductive islands) in matrix,...

Dewatering or drying of diluted cellulose nanofibril suspensions is an effective way for reducing the costs transportation and storage. In this study, poly(vinylpyrrolidone) (PVP) was introduced into a redispersing system concentrated CNFs, obtained redispersed CNFs were used fabricating CNF/PANI (polyaniline) nanomaterials by in situ polymerization method. The results showed that mechanical gr...