Colloidal Second Near‐Infrared‐Emitting Mn‐Doped Ag 2 S Quantum Dots | Zendy

Jeong Sanghwa | Zendy; Doh Hyunmi | Zendy; Kim Sungjee | Zendy

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Colloidal Second Near‐Infrared‐Emitting Mn‐Doped Ag 2 S Quantum Dots

Author(s) -

Jeong Sanghwa,

Doh Hyunmi,

Kim Sungjee

Publication year - 2020

Publication title -

chemnanomat

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.947

H-Index - 32

ISSN - 2199-692X

DOI - 10.1002/cnma.202000086

Subject(s) - photoluminescence , quantum dot , materials science , doping , nanocrystal , monoclinic crystal system , dopant , manganese , electron paramagnetic resonance , infrared , spectroscopy , analytical chemistry (journal) , infrared spectroscopy , ferromagnetism , magnetic semiconductor , nanotechnology , crystal structure , crystallography , optoelectronics , nuclear magnetic resonance , chemistry , condensed matter physics , optics , physics , organic chemistry , quantum mechanics , chromatography , metallurgy

Incorporation of transition metal dopants within a semiconductor nanocrystal has a tremendous effect on the optical and magnetic properties of the semiconductor nanocrystals. Herein, we report on a novel synthesis of second near‐infrared‐emitting photoluminescent Mn 2+ ‐doped Ag 2 S quantum dots via co‐pyrolysis of silver and manganese single‐source precursors. The Mn 2+ doping level was flexibly tuned in Ag 2 S quantum dots, which was confirmed by elemental analysis and electron paramagnetic resonance spectroscopy. The Mn 2+ doping induced negligible change in the pristine monoclinic acanthite Ag 2 S crystal structure but significantly decreased the photoluminescent intensity. Mn 2+ ‐doped Ag 2 S QDs exhibit second near‐infrared emission and ferromagnetic ordering, which show the potential applicability for multimodal fluorescence/MRI probes.

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