Premium
Isotachophoretic purification of nanoparticles: Tuning optical properties of quantum dots
Author(s) -
Hlavacek Antonin,
Skládal Petr
Publication year - 2012
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201100696
Subject(s) - quantum dot , isotachophoresis , nanoparticle , materials science , fractionation , electrophoresis , analytical chemistry (journal) , luminescence , quantum yield , nanotechnology , optoelectronics , chemistry , chromatography , electrolyte , fluorescence , electrode , optics , physics
Synthesized nanoparticles often require fine fractionation according to shape, dimension, mass, chemical composition, charge, and other properties in order to become suitable for practical use. Quantum dots ( QD s) are luminescent nanocrystals with narrow emission peaks. This property has been widely utilized for the multiplexed sensing and barcoding of microparticles. QD s with narrower emission peaks are preferred for such applications. The width of the emission peaks can be significantly reduced after purification. A newly developed preparative isotachophoretic method employs the dependence of spectral properties and electrophoretic mobility on the diameter of QD s. Separated fractions of QD s revealed narrower emission peaks (72% of the original width) and improved quantum yield (two‐fold). The usefulness of the developed isotachophoresis for purification and analysis of other nanostructures, for example, plasmonic nanoparticles and nanobioconjugates, is expected, too.