Atomic-scale defects and electronic properties of a transferred synthesized MoS monolayer.

MoS monolayer samples were synthesized on a SiO/Si wafer and transferred to Ir(111) for nano-scale characterization. The samples were extensively characterized during every step of the transfer process, and MoS on the final substrate was examined down to the atomic level by scanning tunneling microscopy (STM). The procedures conducted yielded high-quality monolayer MoS of milimeter-scale size with an average defect density of 2 × 10 cm.

Synthesis and characterization of alkyl ester functionalized multiwall carbon nanotubes.

Alkyl chains of different length were added onto surface of multiwall carbon nanotubes (MWCNT). Oxidized multiwall carbon nanotubes (MWCNT-COOH) were reacted with thionyl chloride (SOCl2) and further in esterification reaction with given alcohols gave corresponding methyl ester (MWCNT- COOCH3), n-butyl ester (MWCNT-COOC4H9) and n-dodecyl ester (MWCNT-COOC12H25) modified carbon nanotubes. Functionalization of MWCNTs was confirmed by FTIR, Raman and X-ray photoelectron spectroscopy as well as by thermogravimetric analysis.

Photochemical approach to naphthoxazoles and fused heterobenzoxazoles from 5-(phenyl/heteroarylethenyl)oxazoles.

A new synthetic approach is presented for the synthesis of naphthoxazoles and fused heterobenzoxazoles. The starting 5-(aryl/furyl/thienyl/pyridyl ethenyl)oxazoles are prepared from the corresponding α,β-unsaturated aldehydes using Van Leusen reagent in very good yields and are transformed into naphthoxazoles and fused heterobenzoxazoles on irradiation under aerobic conditions and in the presence of iodine.