No abstract

The photodetachment of H− near an interface has been investigated by the closed orbit theory. It is found that the elastic interface has significant influence on the photodetachment process. An analytical formula of the cross section of photodetachment is derived. It is found that the cross section consists of a smooth background and sinusoidal oscillation, which is quite similar to that of electric field.

Ferroelectric organic field-effect transistors (Fe-OFETs) have attracted intensive attention because of their promising potential in nonvolatile memory devices. The quick switching between binary states is a significant fundamental feature in evaluating Fe-OFET memories. Here, we employ 2D molecular crystals via a solution-based process as the conducting channels in transistor devices, in which ferroelectric polymer acts as the gate dielectric. A high carrier mobility of up to 5.6 cm V s and a high on/off ratio of 10 are obtained. In addition, the efficient charge injection by virtue of the ultrathin 2D molecular crystals is beneficial in achieving rapid operations in the Fe-OFETs; devices exhibit short switching time of ∼2.9 and ∼3.0 ms from the on- to the off-state and from the off- to the on-state, respectively. Consequently, the presented strategy is capable of speeding up Fe-OFET memory devices by using solution-processed 2D molecular crystals.

Respiratory Syncytial Virus (RSV) is the leading cause of severe respiratory illnesses including bronchiolitis and pneumonia in young children. In this project, we utilized silver nanoparticles conjugated to various proteins, as well as poly lactic acid, to study the inhibition of RSV infection in cell culture. We selected poly(N-vinyl-2-pyrrolidone) (PVP), recombinant RSV fusion (F) protein, and Bovine Serum Albumin as chemical conjugates with silver nanoparticles. These nanoparticles were analyzed using transmission electron microscopy. After the cytotoxicity of each of the nanoparticle conjugates was established using the Trypan Blue Exclusion Assay, they were mixed with RSV and added to HEp-2 cells. The effectiveness of RSV inhibition was then evaluated by microscopic examination for syncytia formation and by immunofluorescence microscopy. Our results revealed that PVP-coated silver nanoparticles, which showed low toxicity to cells at low concentrations, inhibited RSV infection by 44%, a significant reduction compared to other controls. In this project, we researched the effectiveness of silver nanoparticles for the inhibition of RSV infection. Based on our results, PVP-coated silver nanoparticles seem to be a promising candidate for future RSV treatment research in animal models.