Quantum Dot–Polymer Composites Based on Nanoporous Polypropylene Films with Different Draw Ratios: a paper from LNBE published by the highly rated European Polymer Journal

The highly rated European Polymer Journal specializing in research papers and reviews on the physics and chemistry of polymers, as well as nanotechnologies, has published a paper describing the results of the study performed by Konstantin Mochalov, PhD, senior researcher, and Vladimir Oleinikov, PhD, DSc, leading researcher (Biophysics Group of LNBE), Pavel Samokhvalov, PhD, senior researcher (Nanochemistry Group of LNBE), and their coauthors from Moscow State University and Institute of Macromolecular Compounds of the Russian Academy of Sciences (St. Petersburg).

The authors suggest a new method for fabrication of nanohybrid composites consisting of porous polypropylene doped with fluorescent semiconductor quantum dots. These structures combine the unique fluorescent properties of quantum dots and mechanical propertiesof the carrying polymer matrix, which may be useful for designing sensor systems, highly efficient light-emitting diodes, photovoltaic cells, and various display devices. This study employed a new, reliable method for incorporation of quantum dots into polymer matrices, in particular, polypropylene ones. According to this method, pores of the polymer matrix are filled with a highly concentrated solution of quantum dots, after which the solvent is washed off and the pores are constricted by annealing. This results in flexible, strong polymer structures characterized by intense fluorescence of reliably encapsulated quantum dots.

In addition, the authors have designed and characterized a hybrid system of a combined porous polypropylene matrix filled with nematic liquid crystals. In these structures, liquid crystals modulate the polarization of quantum dot fluorescence, which makes the matrices promising materials for display technologies.

In the published study, both types of structures have been comprehensively characterized using optical microspectroscopic and electron microscopic techniques. Their spatial structure and the morphology of the distribution of encapsulated quantum dots have been determined.

Contact:

Konstantin E. Mochalov, PhD, senior researcher (mochalov@mail.ru)

Laboratory of Nano-Bioengineering, National Research Nuclear University MEPhI (Moscow Engineering Physics Institute)
31 Kashirskoe shosse, 115409 Moscow, Russian Federation

http://www.lnbe.mephi.ru/en

Online publication: http://www.sciencedirect.com/science/article/pii/S0014305716303202

Journal website: http://www.journals.elsevier.com/european-polymer-journal

 
 
 
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