Ho3+–Yb3+ doped NaGdF4 nanothermometers emitting in BW-I and BW-II. Insight into the particle growth intermediate steps†
Here, the excellent thermal sensing capability of Ho3+, Yb3+ doped β-NaGdF4 nanoparticles, where the system is excited into the 5F5 ← 5I8 transition of Ho3+ (640 nm), is reported. The ratio of the 2F5/2 → 2F7/2 transition peak of Yb3+ and the 5I6 → 5I8 transition peak of Ho3+ was employed for thermometry applications, resulting in a novel thermometer, which could potentially operate in BW-I and BW-II (BW – biological window). Additionally, interesting findings were made about the influence of the reaction time on the particle morphology and the presence of intermediate morphology forms.
- This article is part of the themed collection: ChemComm Milestones – First Independent Articles