Bismuth selenide (Bi2Se3), a new topological insulator, has attracted much attention in recent years owing to its relatively simple band structure and large bulk band gap. Compared to bulk, few-layer Bi2Se3 is recently considered as a highly promising material. Here, we use a liquid-phase exfoliation method to prepare few-layer Bi2Se3 in N-methyl-2-pyrrolidone or chitosan acetic solution. The r...

Bismuth vanadate (BiVO4) is a promising material for photoelectrochemical water splitting and photocatalytic degradation of organic moieties. We evaluate the ionization potentials of the (010) surface termination of BiVO4 using first-principles simulations. The electron removal energy of the pristine termination (7.2 eV) validates recent experimental reports. The effect of water absorption on t...

Bismuth selenide (Bi2Se3) nanostructures were synthesized via solvothermal method. The crystallinity of the as-synthesized sample has been analyzed by X-ray diffraction, which shows the formation of rhombohedral Bi2Se3. Electron microscopy examination indicates that the Bi2Se3 nanoparticles have hexagonal flake-like shape. The effect of the synthesis temperature on the morphology of the Bi2Se3 ...

The success of the current anti-Helicobacter pylori (H. pylori) treatment protocols is reported to decrease by years, and research is needed to strengthen the H. pylori eradication treatment. Sequential treatment (ST), one of the treatment modalities for H. pylori eradication, includes amoxicillin 1 gr b.i.d and proton pump inhibitor b.i.d for first 5 days and then includes clarithromycin 500 m...

The effects of a bismuth surfactant layer on the molecular beam epitaxy of GaAs and InxGa12xAs layers on GaAs ~001! were studied. The InxGa12xAs surface reconstruction changed from arsenic stabilized 234 to bismuth stabilized 133 for high enough bismuth fluxes and low enough substrate temperatures. Maintaining a bismuth stabilized surface during InxGa12xAs growth resulted in a larger number of ...

Helicobacter pylori is susceptible to many antimicrobials, but clinically only a few are effective. Two antimicrobials with bismuth or ranitidine or a proton pump inhibitor such as omeprazole are required to achieve a cure rate of >90% and to avoid resistance, which occurs when clarithromycin or metronidazole is the single antimicrobial used. Bismuth plus metronidazole and tetracycline is effec...

Aim: To investigate the eradication therapy, mucosal protective effect and its mechanism of compound bismuth and magnesium granules on Helicobacter Pylori (H. pylori) infection in KM mice. Methods: HP infection model in KM mice was established by gavage with HP standard strain NCTC 11637. KM mice were randomly divided into five groups: the normal control group, the model group, the compound bis...

Low cost disposable working electrodes are specifically desired for practical applications of electrochemical detection considering maturity of electrochemical stations and data collection protocols. In this paper double-sided conductive adhesive carbon tape with nanostructure was applied to fabricate disposable working electrodes. Being supported by indium tin oxide glass, the prepared carbon ...

INTRODUCTION One of the uses of white mineral trioxide aggregate (MTA) is as an apical barrier in immature teeth. Although this treatment has been reported to have high success rates, a number of cases of discoloration have been noted. The aim of this research was to investigate the color stability of white MTA in contact with various solutions used in endodontics. METHODS The change in color...