One-Dimensional Al4O4C Ceramics: A New Type of Blue Light Emitter

Abstract

Ceramic Al4O4C, which has few active functions, has been used as an additive in carbon-containing refractory materials to improve their oxidation resistance and thermal properties. Herein, the crystal and electronic structures of this novel material were systematically investigated for opto-electrical applications, which revealed interesting fluorescence features via photoluminescence (PL) and cathode luminescence (CL). When a 325 nm laser was focused on one end of a single Al4O4C needle, the entire needle was illuminated by the blue emission, which implies that this material exhibits excellent waveguide properties. Interestingly, the thin end exhibited the highest light intensity even though the excited region was located at the thick end. We believe the reason for this observed behaviour is related to the excellent waveguide behaviour as well as to the needle shape, which induces this intriguing blue-light convergence effect. Ab initio calculations demonstrated that the emission light emanates from the interband transition.

ZnxGe1–xO 3D Micronano Structures with Excellent Performance as Anode Material in Lithium Ion Battery

“…The 3D Zn x Ge 1-x O micro-nano structures were prepared in chemical vapor deposition (CVD) system which was illustrated in previous works [26][27][28] . In detail, mixture of ZnO and C black (30mg, atomic ratio 2:1) was put at the center of a polished ceramic sheet and GeO 2 powder (5mg) was placed by side.…”

Preparation of metal sulfide mixtures in montmorillonite by solid–solid reactions

“…The photoluminescence intensities of the products were slightly increased after the storage up to seventeen months corresponding to the blue shift of the absorption onsets of the stored products, attributing to the decrease in the particle size of the metal sulfide mixtures (Sun et al, 2013). In comparison with the photoluminescence intensity of the same product prepared by solid-liquid reactions (Kabilaphat et al, 2015), the PL intensities of the product prepared by solid-solid reaction was two times weaker.…”

Triple phase boundary induced self-catalyzed growth of Ge–graphite core–shell nanowires: field electron emission and surface wettability

“…[23][24][25] The setup and process of the experiment is described below. [23][24][25] The setup and process of the experiment is described below.…”