Hydrophobic fluorinated colloidal photonic crystals for heterogeneous aggregated cluster encoding and energy-saving applications
Hydrophobic fluorinated colloidal photonic crystals for heterogeneous aggregated cluster encoding and energy-saving applications
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用于异质聚集簇编码和节能应用的疏水性氟化胶体光子晶体
DOI：
10.1016/j.cej.2021.128623
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发表时间：
2021-01-25
影响因子：
15.1
通讯作者：
Xu, Chen
中科院分区：
文献类型：
--
作者：
Chen, Tong-Bo;Li, Qiu-Ning;Xu, Chen
构建高质量的胶体光子晶体（CPC）用于光电子，能源和生物应用，具有可行和有效的自驱动组装路线，仍然是一个挑战。在这里，我们证明了有效的自组装的疏水性含氟聚（甲基丙烯酸三氟乙酯）（PTFEMA）CPC通过疏水力异质聚集簇编码和光致发光增强液晶显示器（LCD）。通过疏水末端（-CF 3）自组装得到的CPC膜具有可调的结构颜色和大面积无裂纹形貌。此外，利用PTFEMA乳液和超顺磁性Fe 3 O 4纳米颗粒悬浮液作为两个不连续相，通过三相微流控技术制备Janus微珠，然后将其构建成异质聚集团簇，用于光学编码。最终，PTFEMACPC薄膜作为光致发光增强膜，使CdSe@ZnS量子点的光致发光强度显著提高约1.5倍。LCD设备中的11个折叠。这种新型的PTFEMACPC为光学编码在传感、防伪、信息存储以及节能光电器件方面提供了新的可能。
The construction of high-quality colloidal photonic crystals (CPCs) for optoelectronics, energy and biological applications, featuring the viable and effective self-driven assembly route, still remains a challenge. Herein, we demonstrate the efficient self-assembly of hydrophobic fluorine-containing poly(trifluoroethyl methacrylate) (PTFEMA) CPCs via hydrophobic force for heterogeneous aggregated cluster encoding and photoluminescence enhancement of liquid crystal display (LCD). The CPC films with periodic arranged structure self-assembled through the hydrophobic terminals (-CF3) display tunable brilliant structural color and large-area crack-free morphology. Moreover, taking advantage of PTFEMA emulsion and superparamagnetic Fe3O4 nanoparticle suspension as two discontinuous phases, Janus microbeads are fabricated by the triphase microfluidic technology, which are subsequently constructed into heterogeneous aggregated clusters that perform multiple structural color signals for the optical encoding. Eventually, the PTFEMA CPC film serves as the photoluminescence enhanced film to significantly elevate the photoluminescence (PL) intensity of CdSe@ZnS quantum dots by ca. 11 folds in an LCD device. The novel PTFEMA CPCs may offer the alternative opportunities for optical encoding towards sensing, anticounterfeiting and information storage, as well as the energy-saving optoelectronic devices.