Polymer ligand-induced autonomous sorting and reversible phase separation in binary particle blends.
Polymer ligand-induced autonomous sorting and reversible phase separation in binary particle blends.
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DOI：
10.1126/sciadv.1601484
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发表时间：
2016-12
期刊：
影响因子：
13.6
通讯作者：
Bockstaller MR
中科院分区：
文献类型：
--
作者：
Schmitt M;Zhang J;Lee J;Lee B;Ning X;Zhang R;Karim A;Davis RF;Matyjaszewski K;Bockstaller MR
聚合物配体使纳米技术应用的微结构颗粒基薄膜的高通量制造成为可能。在粒子组装结构中，配体与纳米粒子的拴系已成为控制相互作用和组织的重要策略。我们证明了聚合物系链纳米粒子（用不同类型的聚合物链修饰）混合物中的配体相互作用可以使二元颗粒混合物的临界溶液温度（UCST/LCST）型相行为类似于相应的线性聚合物共混物的相行为。因此，在低于（或高于）UCST（或LCST）的温度下冷却（或加热）具有适当结构的聚合物系住颗粒共混物，会导致单个颗粒成分组织成单型微畴结构。粒子微畴的形状（双连续型或岛型）和长度尺度可以通过组分和热过程条件的变化来调节。通过临界温度对LCST颗粒刷共混物进行热循环，使单颗粒畴结构可逆生长和溶解。自主和可逆地将多组分颗粒混合物组织成单型微畴结构的能力，可以在高通量制造具有定制和可变结构和性能的固体薄膜方面取得革命性进展，这在一系列纳米颗粒基材料技术中发挥着重要作用。
Polymer ligands enable the high-throughput fabrication of microstructured particle–based films for nanotechnology applications. The tethering of ligands to nanoparticles has emerged as an important strategy to control interactions and organization in particle assembly structures. We demonstrate that ligand interactions in mixtures of polymer-tethered nanoparticles (which are modified with distinct types of polymer chains) can impart upper or lower critical solution temperature (UCST/LCST)–type phase behavior on binary particle mixtures in analogy to the phase behavior of the corresponding linear polymer blends. Therefore, cooling (or heating) of polymer-tethered particle blends with appropriate architecture to temperatures below (or above) the UCST (or LCST) results in the organization of the individual particle constituents into monotype microdomain structures. The shape (bicontinuous or island-type) and lengthscale of particle microdomains can be tuned by variation of the composition and thermal process conditions. Thermal cycling of LCST particle brush blends through the critical temperature enables the reversible growth and dissolution of monoparticle domain structures. The ability to autonomously and reversibly organize multicomponent particle mixtures into monotype microdomain structures could enable transformative advances in the high-throughput fabrication of solid films with tailored and mutable structures and properties that play an important role in a range of nanoparticle-based material technologies.
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影响因子：
16.6
作者：
Alonso-Redondo E;Schmitt M;Urbach Z;Hui CM;Sainidou R;Rembert P;Matyjaszewski K;Bockstaller MR;Fytas G
通讯作者：
Fytas G
影响因子：
64.8
作者：
Mirkin, CA;Letsinger, RL;Storhoff, JJ
通讯作者：
Storhoff, JJ
影响因子：
41.2
作者：
通讯作者：
--
影响因子：
46.9
作者：
Mazzola, L
通讯作者：
Mazzola, L
影响因子：
4.4
作者：
DEGENNES, PG
通讯作者：
DEGENNES, PG