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- Title
Synthesis of CdS<sub>1-X</sub>Se<sub>X</sub> quantum dots in a protozoa Tetrahymena pyriformis.
- Authors
Cui, Yin-Hua; Li, Ling-Li; Tian, Li-Jiao; Zhou, Nan-Qing; Liu, Dong-Feng; Lam, Paul K. S.; Yu, Han-Qing
- Abstract
Quantum dots (QDs) are recognized as the excellent fluorescence and photochemical materials to be applied in bioimaging, biomedical, and solar cell fields. Biosynthesized QDs (bio-QDs) have attracted attention due to their simple, eco-friendly, and excellent biocompatible traits. Moreover, bio-QDs could not be replaced by chemically fabricated QDs in many fields. Bio-QDs synthesized by different microorganisms have diverse characteristics. In this work, the biosynthesis of QDs by Tetrahymena pyriformis, a typical protozoa in aquatic environments, was achieved for the first time. The synthesized materials by T. pyriformis emitted yellow fluorescence and had an average diameter of 8.27 ± 0.77 nm. Spectral characterization results demonstrated that the synthesized QDs were CdS1-XSeX. Meanwhile, the fluorescence intensities of the synthesized bio-QDs showed a linear relationship with Cd2+ dosage ranging from 20 to 80 μM. The fluorescence enhancement of the synthesized QDs was highly selective to Cd2+ compared to other metal ions. The bio-QDs were demonstrated to have a great potential to be applied for Cd2+ detection. This work provides valuable information about the transformation of heavy metal ions in protozoan and is useful to accelerate the applications of the synthesized QDs.
- Subjects
QUANTUM dot synthesis; TETRAHYMENA pyriformis; SEMICONDUCTOR synthesis; TETRAHYMENA; PROTOZOA
- Publication
Applied Microbiology & Biotechnology, 2019, Vol 103, Issue 2, p973
- ISSN
0175-7598
- Publication type
Article
- DOI
10.1007/s00253-018-9499-y