A recyclable supramolecular membrane for size-selective separation of nanoparticles
A recyclable supramolecular membrane for size-selective separation of nanoparticles
复制标题
DOI：
10.1038/nnano.2010.274
复制
发表时间：
2011-03-01
影响因子：
38.3
通讯作者：
Rybtchinski, Boris
中科院分区：
文献类型：
--
作者：
Krieg, Elisha;Weissman, Haim;Rybtchinski, Boris
大多数实用材料都是通过不可逆的共价键结合在一起的。基于非共价相互作用的材料可以进行可逆自组装，这在制造、加工和可回收性方面具有优势(1)，但大多数非共价系统在实际应用中都太脆弱，无法与共价材料竞争，尽管人们在开发稳健的非共价阵列方面进行了大量尝试(1-4)。在这里，我们报道了由纤维组件（5）在水中制备的纳米结构超分子膜。该膜由于强疏水相互作用而非常坚固(6,7)，使其可用于金属和半导体纳米颗粒的尺寸选择性分离。薄（12 μm）膜用于过滤（类似于 5 nm 截止），较厚（45 μm）膜允许在亚 5 nm 域中进行尺寸选择性色谱。与传统膜不同，我们的超分子膜可以使用有机溶剂拆卸、清洗、重新组装和重复使用多次。
Most practical materials are held together by covalent bonds, which are irreversible. Materials based on noncovalent interactions can undergo reversible self-assembly, which offers advantages in terms of fabrication, processing and recyclability(1), but the majority of noncovalent systems are too fragile to be competitive with covalent materials for practical applications, despite significant attempts to develop robust noncovalent arrays(1-4). Here, we report nanostructured supramolecular membranes prepared from fibrous assemblies(5) in water. The membranes are robust due to strong hydrophobic interactions(6,7), allowing their application in the size-selective separation of both metal and semiconductor nanoparticles. A thin (12 mu m) membrane is used for filtration (similar to 5 nm cutoff), and a thicker (45 mu m) membrane allows for size-selective chromatography in the sub-5 nm domain. Unlike conventional membranes, our supramolecular membranes can be disassembled using organic solvent, cleaned, reassembled and reused multiple times.