Tellurium quantum dots: Preparation and optical properties

Chaoyu Lu, Xueming Li, Libin Tang, Sin Ki Lai, Lukas Rogée, Kar Seng Teng, Fuli Qian, Liangliang Zhou, Shu Ping Lau

Research output: Journal article publicationJournal articleAcademic researchpeer-review

6 Citations (Scopus)


Herein, we report an effective and simple method for producing Tellurium Quantum dots (TeQDs), zero-dimensional nanomaterials with great prospects for biomedical applications. Their preparation is based on the ultrasonic exfoliation of Te powder dispersed in 1-methyl-2-pyrrolidone. Sonication causes the van der Waals forces between the structural hexagons of Te to break so that the relatively coarse powder breaks down into nanoscale particles. The TeQDs have an average size of about 4 nm. UV-Vis absorption spectra of the TeQDs showed an absorption peak at 288 nm. Photoluminescence excitation (PLE) and photoluminescence (PL) are used to study the optical properties of TeQDs. Both the PLE and PL peaks revealed a linear relationship against the emission and excitation energies, respectively. TeQDs have important potential applications in biological imaging and catalysis as well as optoelectronics.
Original languageEnglish
Article number063112
JournalApplied Physics Letters
Issue number6
Publication statusPublished - 7 Aug 2017

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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