Lanthanide-doped bismuth-based nanophosphors for ratiometric upconversion optical thermometry

Abstract

Lanthanide-doped bismuth-based nanospheres can be rapidly synthesized within 1 minute for upconversion luminescence ratiometric temperature detection.

Acid-Responsive Bismuth Heterojunction Nanocatalyst for Photocatalytic and Photothermal Treatment of Tumors

“…Bi-Bi 2 O 3−x S x heterojunction was synthesized by a two-step process including coprecipitation and reduction. 31,32,34,35 structure of BiF 3 :20%Yb before reduction (Figure S1). Statistical particle size analysis showed an average diameter of about 45 nm (Figure S2).…”

Recent Advances in Nanoplatform Construction Strategy for Alleviating Tumor Hypoxia

“…Bismuth-based nanomaterials have been widely used in the biomedicine field because of their great biosafety, easy preparation, and low cost. [118,159,160] Researchers have flourished in exploring their semiconductor properties, but few have explored CAT-like activity. Among them, Liu et al synthesized a simple but multifunctional nanoradiosensitizer (T-BiO 2−x NSs) based on Tween 20 modified ultrathin BiO 2−x nanosheets.…”

Tunable upconversion in ZnAl2−xGaxO4:Er,Yb phosphors by modulating the Al/Ga ratio and application in optical thermometry

“…However, the lower energy gap of these two levels leads to inferior sensitivity and poor signal discrimination ability. 13 To tackle this problem, the emission response from non-thermally coupled levels (NTCL) (Δ E > 2000 cm −1 ) has been used for optical thermometry. 15 Moreover, Er 3+ ions themselves cannot effectively absorb the near infrared (NIR) radiation, which leads to poor UC emission.…”

“…[10][11][12] The temperature is calculated by making use of Boltzmann thermal equilibrium. 13 Here, the emission intensity responses of two thermally coupled levels (TCL) are used with a unique energy band gap (200 r DE r 2000 cm À1 ). Rare earth ions such as Er 3+ , Tm 3+ , Nd 3+ , Ho 3+ , etc.…”