Luminescent polynorbornene/quantum dot composite nanorods and nanotubes prepared from AAO membrane templates

Abstract

Luminescent polynorbornene (PNB)/quantum dot (CdSe@ZnS; QD) composite nanorods and nanotubes were successfully prepared using anodic aluminum oxide (AAO) membranes of various pore sizes as templates. To protect QDs with high quantum yield from quenching during the phosphoric acid treatment used to remove the AAO templates, chemically stable and optically clear norbornene-maleic anhydride copolymers (P(NB-r-MA)) were employed as a capping agent for QDs. The amine-terminated QDs reacted with maleic anhydride moieties in P(NBr-MA) to form PNB-grafted QDs. The chemical-and photo-stability of QDs encapsulated with PNB copolymers were investigated by photoluminescence (PL) spectroscopy. By varying the pore size of the AAO templates from 40 to 380 nm, PNB/QD composite nanorods or nanotubes were obtained with a good dispersion of QDs in the PNB matrix.

Effect of molecular weight on spherulitic growth rate of poly(ϵ‐caprolactone) and poly(ϵ‐caprolactone)‐b‐poly(ethylene glycol)

“…4‐Aminobenzylamine (4‐ABA) was also supplied from Aldrich. Cis‐5‐Norbornene‐exo‐2,3‐dicarboxylic anhydride (Exo‐ND) was prepared by the thermal isomerization of the corresponding endo‐isomer (Aldrich) according to the literature 29. KMnO 4 and N , N ‐dimethylacetamide (DMAc) were also purchased from Aldrich.…”

“…The imide side chain that contained polynorbornene exhibited a high T g , good physical and mechanical properties, and high thermal resistance 24–27. For example, poly( N ‐adamantyl‐norbornene‐5,6‐dicarboximide) had a T g of 271 °C 28, 29. Polynorbornenes with lateral imide groups have an advantage in that they easily react with various substituents in a way that allows the synthesis of a variety of functionalized polynorbornenes and composites with organic or inorganic materials.…”

“…Recently, the interest in polymer‐graphene hybrids has increased significantly because of the unique properties of graphene as a filler 27, 29. In hybrid materials, not only is the tuning of the interfacial interaction between graphene and the polymer important, but also the homogeneous dispersion state is key to achieving the high performance of the resulting hybrids.…”

Nanoporous Anodic Aluminum Oxide: Fabrication, Characterization, and Applications

“…Hexagonally arranged organic nanotubes are being investigated due to their optical Handbook of Nanoelectrochemistry DOI 10.1007/978-3-319-15207-3_19-1 # Springer International Publishing Switzerland 2015 (poly(methyl methacrylate) [174], polynorbornene [192], poly(vinyl pyrrolidone) [209]), pyroelectric (triglycine sulfate [187]), and piezoelectric properties (poly(vinylidene fluoride) [139]). Nanodots made of organic compounds are rarely fabricated.…”

“…Anodic aluminum oxide is also applied as a template for fabrication of arranged nanowires made of organic compounds (Table 9). These are often formed via template dipping or wetting [3, 94,98,99,114,174,187,190,192,251]. Optical properties of organic and polymeric nanowires are very often researched [3, 98,99,101,125,192,174,273].…”