Formation of Spindlelike Aggregates and Flowerlike Arrays of Polystyrene-b-poly(acrylic acid) Micelles

Formation of Spindlelike Aggregates and Flowerlike Arrays of Polystyrene-b-poly(acrylic acid) Micelles

In this letter we describe a simple physical method for the ordered aggregation of scattered single spherical polystyrene-b-poly(acrylic acid) (PS-b-PAA) micelles. First, narrow dispersed spindlelike aggregates, about 60 nm in diameter and 1.5 μm in length, are obtained from the aggregation of singl...

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Veröffentlicht in:Langmuir 2004-06, Vol.20 (12), p.4787-4790
Hauptverfasser: Gao, Lichao, Shi, Linqi, An, Yingli, Zhang, Wangqing, Shen, Xudong, Guo, Shiyi, He, Binglin
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container_title Langmuir
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Shi, Linqi
An, Yingli
Zhang, Wangqing
Shen, Xudong
Guo, Shiyi
He, Binglin
description In this letter we describe a simple physical method for the ordered aggregation of scattered single spherical polystyrene-b-poly(acrylic acid) (PS-b-PAA) micelles. First, narrow dispersed spindlelike aggregates, about 60 nm in diameter and 1.5 μm in length, are obtained from the aggregation of single spherical PS-b-PAA micelles at 0 °C on a glass slide. Then, the yielding spindlelike units can further aggregate into long-ranged, close-packed, flowerlike arrays after a given amount of freeze−thaw cycles. The formation of the interesting arrays is ascribed to the templated aggregation of micelles on the water polycrystal at the freezing point.
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