Synthesis of Nanocomposite Materials with Controlled Structures and Optical Emissions: Application of Various Methacrylate Polymers for CdSe Quantum Dots Encapsulation
CdSe quantum dots (QDs) were incorporated in polymer films via in situ polymerization using one of the four different monomers having a varied hydrocarbon side chain length, namely, hexyl, lauryl, stearyl, or behenyl methacrylate. This technique resulted in the preparation of
a series of the QD-based nanocomposite materials for which laser scanned confocal microscopy imaging revealed a uniform dispersion of nanoparticles within the polymethacrylate matrices. Importantly, the polymer encapsulation of highly luminescent CdSe QDs did not affect their optical properties.
The films exhibit the size-quantized optical effects characteristic of QDs. The changes in photoluminescence (PL) intensity of CdSe QDs were investigated as a function of illumination duration in different chemical environments, including the above polymeric matrices and a chloroform solution.
Enhancement of the photoluminescence quantum yield for photoactivated QDs in methacrylate polymers was observed. This study of quantum yields of QD-based composites is important for understanding the involvement of surface states of photoactivated QDs as well for identifying ideal polymeric
hosts for photoinduced surface passivation.
Keywords: CDSE QUANTUM DOTS; METHACRYLATE POLYMERS; NANOCOMPOSITES; PHOTOLUMINESCENCE; SENSORS
Document Type: Research Article
Publication date: 01 March 2010
- Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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