His research interests include forming process, microstructures and mechanical properties of advanced metallic materials, processing technologies and mechanical property characterization of special steels and alloys, microalloying and microstructural evolution of the ferrous materials, and light metal-matrix composites. Dr. Chen has authored and co-authored more than 100 peer-reviewed papers. He is now the member of the editorial committees of
We address the question of whether the superconducting transition temperature (T c ) of high-Tc cuprates is enhanced when randomly distributed dopant atoms form an ordered array in the charge reservoir layers. This study is possible for the Sr 2 CuO 3+δ superconductor with K 2 NiF 4 -type structure in which oxygen atoms only partially occupy the apical sites next to the CuO 2 planes and act as hole-dopants. We show that remarkable T c enhancement up to 95K in this mono CuO2 layered HTS is associated with the apical oxygen ordering, not to the hole concentration change. The result points a route toward further enhancement of T c in cuprate superconductors.
We demonstrate the fabrication of a 3D ordered sea urchin like TiO 2 structure by combining colloidal spheres template, atomic layer deposition (ALD), and hydrothermal growth method. The 3D sea urchin like TiO 2 arrays as photoanode present improved photoelectrochemical performance in contrast to 2D TiO 2 hollow microspheres and 1D TiO 2 nanowires arrays. With CdS quantum dots sensitization, the sea urchin like TiO 2 array photoanode yields a photocurrent of 5.4 mA cm −2 at 0 V vs Ag/AgCl. The performance improvement is attributed to the increased specific surface area and porosity, light trapping effect by multiscattering of the hierarchical structure, as well as direct charge transportation paths from the nanorods to the microspheres.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.