Rare-earth Yb(3+) and Ho(3+) co-doped fluorapatite (FA:Yb(3+)/Ho(3+)) crystals were prepared by hydrothermal synthesis, and their structure, upconversion properties, cell proliferation and imaging were investigated. The synthesized crystals, with a size of 16 by 286 nm, have a hexagonal crystal structure of classic FA and a Ca/Yb/Ho molar ratio of 100/16/2.1. Several reasonable Yb(3+)/Ho(3+) -e...

The adsorption of fatty acid, kerosene and acid-kerosene on fluorapatite (001) surface were investigated by density functional theory (DFT) calculations. results showed that the single acid could form stable chemisorption O acids bonding with Ca1 site. not be stably adsorbed because H did hydrogen bond PO<sub>4</sub><sup>3-</sup> (O<sub>surf</sub>). For coads...

New Insights into a Biomimetic System of High Complexity Horst Borrmann, Jürgen Brickmann, Jana Buder, Wilder Carrillo-Cabrera, Patrick Duchstein, Olga Frank-Kamenetskaya, Oliver Hochrein, Ya-Xi Huang, Agnieszka Kawska, Simon Kokolakis, Theresa Kollmann, Hannes Lichte, Ygit Öztan, Raffaella Paparcone, Tilo Poth, Yurii Prots, Elena Rosseeva, Ulrich Schwarz, Paul Simon, Harald Tlatlik, Dirk Zahn,...

In volatile-rich fluorapatite, which represents 70 % of all fission track age-determinations, tracks produced along the trajectories of fission fragments have been considered to be cylinders of radiation-damaged amorphous material, similar to tracks in other minerals, such as zircon [1]. The atomic-scale structure of unetched fission tracks controls temperature-induced “fading” and finally lead...

in this paper we propose and simulate a new heterostructure mesfet, called δ-doped ldd hmesfet. to improve carrier velocity in vicinity of the source in channel of gaas mesfet, one can replace source with alxga 1-x as. by increasing al content, discontinuity of hetero-interface could be increased. therefore, the velocity increases in the low field. however, increasing al mole fraction in excess...