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With decreasing dimension, materials exhibit properties which bulk materials do not have. These properties and their related phenomena have attracted more and more attention nowadays. From the 1960s, bismuth (Bi) has drawn great interest for its low carrier concentration, small effective carrier mass and large Fermi wavelength. With the given special properties of bulk Bi, one of the interesting and appealing prob...

Raphene has attracted great interests due to their unique physical and chemical properties,which could be utilized for numerous potential applications. In N-doping processes,it is significant to identify the doping species,which have a great influence on the electronic structure of graphene. The team probed the evolution of the solid state N-doping in graphene utilizing the X-ray absorption near-edge structure(XAN...

A team from the Institute of High Energy Physics has gained in-depth insight into the magnetic behavior and electronic configuration in Mn-doped ZnO nanorods by surface modification. The team successfully tuned the magnetic behavior in Mn-doped ZnO nanorods from paramagnetism to ferromagnetism via surface modification. From the microscopic point of view the surface Mn ions exists in the form of 3+valence and fits ...

GaN material and related LED devices always suffered from the serious strains induced by the heteroepitaxy of III-N semiconductor on the most popular sapphire substrate. GaN material and related LED devices were grown by MOVPE on CPSS. Crystalline and strain in epilayers were analyzed with the equipment atBSRF. Approximation of edge dislocation density shows that the value on CPSSwas reduced to less than 25%(about...

Recently, researchers in Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences have made great progress in this field. The develop a series of highly π-extended copolymers containing diketopyrrolopyrrole (DPP) and (E)-2-(2-(thiophen-2-yl) vinyl)thiophene (TVT) moieties (Figure 1). The as-synthesized copolymer PDVT-8 with short 2-octyldodecyl side-chains showed a high field-effect m...

Since the layer of blue pigments was between the glaze and body, little is known about the elements’ oxidation and chemical environment which is directly correlated to the origin of blue color. X-ray absorption fine structure (XAFS) is an atomic probe and has demonstrated its power to investigate the oxidation and local structure of transition element at the molecular scale in recent years. For further understand...
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