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Simultaneous photoluminescence import and mechanical enhancement of polymer films using silica-hybridized quantum dots
Quantum dot (QD)-polymer nanocomposites that simultaneously possess stable photoluminescence and enhanced mechanical properties are presented for the first time based on the facile blending of the ultrasmall silica-hybridized CdTe QDs (SiO(2)-h-QDs) or 3-(trimethoxysilyl) propyl methacrylate-modified SiO(2)-h-QDs (SiO(2)-h-QD-MSMAs) with polymer. Typically, for SiO(2)-h-QD-MSMA/poly(methyl methacr...
http://www.polymer.cn//ss/zhouli/publicationsshow_8257.html |
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Facile synthesis of stable and water-dispersible multi-hydroxy conjugated polymer nanoparticles with tunable size by dendritic crosslinking
A new strategy has been developed to synthesize, conjugated polymer (CP) nanoparticles (CPNs) with numerous surface hydroxyl groups via click chemistry between: a;CP and hyperbranched polyglycerol (HPG), in miniemulsion. Laser light scattering and TEM characterizations indicate that the synthesized CPNs have spherical shapes with uniform sizes tunable in the. range of 40-210 nm simply by adjusting...
http://www.polymer.cn//ss/zhouli/publicationsshow_8248.html |
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One-step synthesis of versatile amine- and vinyl-capped magnetic iron oxide nanoparticles for polymer grafting, dye adsorption and catalysis
Magnetic iron oxide nanoparticles (MIONs) bearing amine and vinyl groups are fabricated straightforwardly using vinyl-based tertiary amine molecules as both alkaline source and ligands based on the coprecipitation of iron ions in aqueous solution. The as-prepared MIONs present amphiphilic performance that can be well-dispersed both in aqueous solution and common organic solvents (e.g., ethanol, di...
http://www.polymer.cn//ss/zhouli/publicationsshow_8246.html |
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Polymer, 54, 3737-3743: Single-chain mechanics of poly(N-isopropyl-acrylamide) in the water/methanol mixed solvent
The variation of the single-chain mechanics of PNIPAM for the entire
range of the methanol molar fraction (χmethanol) (0 ~
100%) in the water/methanol mixed solvent have been studied by AFM-based single-molecule
force spectroscopy at RT. In general, the single-chain mechanics of PNIPAM
shows a reentrant variation upon the change of χmethanol from 0 to
100%. The possible mechanism for the re...
http://www.polymer.cn//ss/cuishuxun/publicationsshow_8215.html |
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Polymer, 50, 930-935: Modeling single chain elasticity of single-stranded DNA: A comparison of three models
The
dominant models of polymers, i.e. the freely jointed chain (FJC) model, the wormlike
chain (WLC) model and the freely rotating chain (FRC) model are modified by
integrating the inherent single-molecule elasticity obtained from quantum
mechanics (QM) ab-initio calculations. The QM modified models have been
utilized to generate fitting curves for single-stranded DNA obtained in organic
solvent. ...
http://www.polymer.cn//ss/cuishuxun/publicationsshow_8214.html |
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217. Electrospun polymer nanofiber membrane electrodes and an electrolyte for highly flexible and foldable all-solid-state supercapacitors.
A sandwiched symmetric all-solid-state supercapacitor consisting of flexible electrospun polyaniline (PANI)/carbonized polyimide (CPI) nanocomposite membrane electrodes and a poly(vinyl alcohol) (PVA)/poly(acrylic acid) (PAA) nanofiber membrane-reinforced PVA/H3PO4 gel separator has been successfully fabricated. Needle-like PANI nanoparticles are vertically formed on the high electrically conducti...
http://www.polymer.cn//ss/liutianxi/publicationsshow_8123.html |
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Facile Fabrication of pH-Responsive and Size-Controllable Polymer Vesicles From a Commercially Available Hyperbranched Polyester
A
novel pH-responsive polymer vesicle obtained by the aqueous
self-assembly of carboxy-terminated hyperbranched polyesters is
reported. The synthesis is very simple, just a one-step esterification
of the commercially available hydroxy-terminated hyperbranched polyester
of Boltorn Hx (x?=?20, 30, 40) with succinic
anhydride. The vesicle size can be controlled from 200 nm to 10 μm by...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8080.html |
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Enhanced Gene Transfection Efficiency of PDMAEMA by Incorporating Hydrophobic Hyperbranched Polymer Cores: Effect of Degree of Branching
Poly(2-(dimethylamino)ethyl
methacrylate) (PDMAEMA) is a well-known cationic polymer candidate for non-viral
vectors for gene transfection. However, such an application has been greatly
limited due to the cytotoxicity of the polymers. Herein, PDMAEMAs are grafted
from hydrophobic hyperbranched PEHO cores (PEHO means
poly(3-ethyl-3-(hydroxymethyl)-oxetane)), and the obtained hy...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8078.html |
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Polymerization-like Multilevel Hierarchical Self-Assembly of Polymer Vesicles into Macroscopic Superstructures with Controlled Complexity
We demonstrate a high-leveled hierarchical self-assembly process into
fractal structures. Two hyperbranched multiarm copolymers are first
coassembled into binary isotropic vesicles in the primary self-assembly.
Then, these primary vesicles are in situ endowed with anisotropic
hydrophobic “binding sites” through a pH-induced lateral microphase
separation, undergoing an isotropic?...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8046.html |
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A Supramolecular Janus Hyperbranched Polymer and Its Photoresponsive Self-Assembly of Vesicles with Narrow Size Distribution
Herein, we report a novel Janus
particle and supramolecular block copolymer consisting of two chemically
distinct hyperbranched polymers, which is coined as Janus hyperbranched polymer.
It is constructed by the noncovalent coupling between a hydrophobic
hyperbranched poly(3-ethyl-3-oxetanemethanol) with an apex of an azobenzene
(AZO) group and a hydrophilic hyperbranched polyglycerol w...
http://www.polymer.cn//ss/zhouyongfeng/publicationsshow_8037.html |
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