Fibrous phosphorus is a crystalline structure belonging to the extensive family of phosphorus allotropes. The material’s structure consists of one-dimensional tubular layers held together by van der Waals forces and is a semiconductor with an optical band gap of 2.12 eV in its bulk form. With these properties in mind, we developed two different methods for the fabrication of fibrous phosphorus quantum dots (FPQDs): 1) a solution-based method and 2) a solvothermal-based method. The FPQDs were prepared by either sonicating the material or by letting it stir for different times at high temperatures, followed by centrifugation to separate by size. The size of the QDs is dependent on the fabrication method and ranges from 2-10 nm in diameter with a height profile in the range of 1.5 to 5 nm. The as-prepared FPQDs show excitation-dependent fluorescence properties with emission peaks ranging from the indigo-blue to the green region and band gaps of 3.1-3.4 eV. As a proof-of-concept of its properties, we used FPQDs as a fluorescent label in bioimaging of adenocarcinoma cells.

Fibrous phosphorus quantum dots and their application in bioimaging

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

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