Shi Ling-Ying, Subramanian Ashwanth, Weng Lin, Lee Sangho, Kisslinger Kim, Nam Chang-Yong, Ross Caroline A
College of Polymer Science and Engineering, Sichuan University, Chengdu 610065, China.
Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA.
Nanoscale. 2022 Feb 3;14(5):1807-1813. doi: 10.1039/d1nr06065a.
The combination of block copolymer (BCP) thin film self-assembly and selective infiltration synthesis of inorganic materials into one BCP block provides access to various organic-inorganic hybrids. Here, we apply sequential infiltration synthesis, a vapor-phase hybridization technique, to selectively introduce ZnO into the organic microdomains of silicon-containing rod-coil diblock copolymers and a triblock terpolymer, polydimethylsiloxane (PDMS)--poly{2,5-bis[(4-methoxyphenyl)-oxycarbonyl]styrene} (PDMS--PMPCS) and PDMS--polystyrene--PMPCS (PDMS--PS--PMPCS), in which the PMPCS rod block is a liquid crystalline polymer. The in-plane cylindrical PDMS--PMPCS and core-shell cylindrical and hexagonally perforated lamellar PDMS--PS--PMPCS films were infiltrated with ZnO with high selectivity to the PMPCS. The etching contrast between PDMS, PS and the ZnO-infused PMPCS enables the fabrication of ZnO/SiO binary composites by plasma etching and reveals the core-shell morphology of the triblock terpolymer.
嵌段共聚物（BCP）薄膜自组装与无机材料选择性渗透合成到一个BCP嵌段中的结合，为制备各种有机-无机杂化材料提供了途径。在此，我们应用顺序渗透合成法，一种气相杂化技术，将ZnO选择性地引入含硅的棒-线圈二嵌段共聚物和三嵌段三元共聚物聚二甲基硅氧烷（PDMS）-聚{2,5-双[(4-甲氧基苯基)-氧羰基]苯乙烯}（PDMS-PMPCS）以及PDMS-聚苯乙烯-PMPCS（PDMS-PS-PMPCS）的有机微区中，其中PMPCS棒状嵌段是一种液晶聚合物。平面内圆柱形的PDMS-PMPCS以及核壳圆柱形和六边形穿孔层状的PDMS-PS-PMPCS薄膜被ZnO以对PMPCS具有高选择性的方式渗透。PDMS、PS与注入ZnO的PMPCS之间的蚀刻对比度使得能够通过等离子体蚀刻制备ZnO/SiO二元复合材料，并揭示了三嵌段三元共聚物的核壳形态。
