NDLI: Real-time monitoring of the UV-induced formation of quantum dots on a milliliter, microliter, and nanoliter scale

Content Provider	Springer Nature Link
Author	Nejdl, Lukas Zitka, Jan Mravec, Filip Milosavljevic, Vedran Zitka, Ondrej Kopel, Pavel Adam, Vojtech Vaculovicova, Marketa
Copyright Year	2017
Abstract	The authors report on a systematic study on the low-cost, low-temperature, and fast synthesis of water soluble quantum dots (QDs) stabilized by mercaptosuccinic acid by UV irradiation. The effects of UV irradiation (at 254 nm and 250 nm) and temperature on the precursors (Cd:Se, Cd:Te, Cd, Zn:S, Zn:Se and Zn) are described. Best results are achieved with a mixture of precursors containing cadmium, selenium and MSA where a 10-min irradiation with 254-nm light gives CdSe QDs with a quantum yield of 13.5%. The authors also describe the preparation and monitoring of the formation of QDs in sub-mg, sub-μg and sub-ng quantities, the smallest concentration being 258 pg in volume of 4 nL. The growth of the QDs can be monitored in real time by absorption, fluorescence and dynamic light scattering. The solutions of the particles also are characterized by fluorescence correlation spectroscopy and detected by LED-induced fluorescence. The preparation of such QDs by UV radiation is simple, easily controllable, and inexpensive. Conceivably, it can be integrated with lab-on-chip, micro total analysis systems or other instrumentation. Graphical abstract Monitoring of formation of quantum dots (QDs) by UV irradiation in different volumes (mL, μL and nL) by fluorescence correlation spectroscopy and capillary electrophoresis with light emitting diode-induced fluorescence detection.
Starting Page	1489
Ending Page	1497
Page Count	9
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	184
Issue Number	5
e-ISSN	14365073
Language	English
Publisher	Springer Vienna
Publisher Date	2017-03-03
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Nanocrystal Capillary electrophoresis Irradiation Fluorescence Nanochemistry Nanotechnology Characterization and Evaluation of Materials Analytical Chemistry Microengineering
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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