2011
DOI: 10.1021/ja203106c
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pH-Controlled Exponential and Linear Growing Modes of Layer-by-Layer Assemblies of Star Polyelectrolytes

Abstract: We report the unique layer-by-layer (LbL) assembly behavior of pH-sensitive star-shaped polyelectrolytes with both linear and exponential growth modes controlled by star architecture and assembly conditions. Cationic poly[2-(dimethylamino)ethyl methacrylate] and anionic poly(acrylic acid) stars were synthesized via "core-first" atom-transfer radical polymerization (ATRP) based on multifunctional initiators, in addition to their linear analogues. We demonstrated the LbL growth behavior as a function of depositi… Show more

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Cited by 87 publications
(96 citation statements)
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“…For example, the surface overcharge at every deposition step can be estimated as being about half the value of the net charge of the deposited nanoparticles. The amplitude of the charge fluctuations 26 demonstrated the complex nature of LbL assembly by investigating the effect of pH on LbL film growth of star-shaped polyelectrolytes. Thicknesses and morphologies of the LbL films were governed by either linear or exponential growth mode that can be tuned by varying pH conditions.…”
Section: Exploration Of Lbl Nanoarchitectonicsmentioning
confidence: 99%
“…For example, the surface overcharge at every deposition step can be estimated as being about half the value of the net charge of the deposited nanoparticles. The amplitude of the charge fluctuations 26 demonstrated the complex nature of LbL assembly by investigating the effect of pH on LbL film growth of star-shaped polyelectrolytes. Thicknesses and morphologies of the LbL films were governed by either linear or exponential growth mode that can be tuned by varying pH conditions.…”
Section: Exploration Of Lbl Nanoarchitectonicsmentioning
confidence: 99%
“…22,23 The multiple terminal groups are used to control the assembly of the molecules in solution, and at surfaces and interfaces [24][25][26][27][28][29][30][31][32] as well as their stimuli-responsive behavior. 33,34 Unique morphologies were found in branched and star block copolymers that are not observed for linear block copolymers. [35][36][37][38][39] At the air-water interface, the hydrophobic chains collapse into globules while the hydrophilic chains spreads out to form a brush-like or a flat (pancake-like) structures.…”
mentioning
confidence: 99%
“…In comparison with linear-linear PEMs, multilayers formed by star polyelectrolytes usually exhibit some unique properties [30]. Such unique properties of star-star PEMs should be attributed to the topological structure of star polyelectrolytes and the resulted distinct behavior of chain interpenetration between the layers.…”
Section: Effects Of Chain Rigidity and Architecture On The Growth Of mentioning
confidence: 99%
“…Such unique properties of star-star PEMs should be attributed to the topological structure of star polyelectrolytes and the resulted distinct behavior of chain interpenetration between the layers. Star-shaped polyelectrolytes usually have a more compact structure, giving rise to a more limited interpenetration in comparison with that of linear chains [30]. Thus, it is anticipated that the behavior of chain interpenetration in the growth of star-star PEMs should be different from that in the growth of linearlinear PEMs.…”
Section: Effects Of Chain Rigidity and Architecture On The Growth Of mentioning
confidence: 99%
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