Low temperature preparation of α-tricalcium phosphate up-converted luminescence nano phosphor

In this work, fluorescent α-tricalcium phosphate (α-TCP: Yb3+,Er3+) was successfully prepared by the thermal transformation of amorphous calcium phosphate (ACP) precursor. β-cyclodextrin (β-CD) was used for preparation of ACP precursor and played an important role in designing its special structure. Due to the new low temperature preparation of α-tricalcium phosphate, the obtained microsphere has a uniform distribution with rational strength (15.0 Mpa). Futhermore, the two ions (Yb3+,Er3+) were doped into α-tricalcium phosphate (α-TCP), the obtained phosphor can emit exhibit bright green luminescence under the excitation of a 980 nm laser diode. The α-TCP: Yb3+,Er3+ may have great potential in the fields of in vivo bio-imaging and a drug delivery system.