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首页> 外文期刊>RSC Advances >Solution-stable anisotropic carbon nanotube/graphene hybrids based on slanted columnar thin films for chemical sensing
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Solution-stable anisotropic carbon nanotube/graphene hybrids based on slanted columnar thin films for chemical sensing

机译：基于倾斜柱薄膜的溶液稳定的各向异性碳纳米管/石墨烯杂种用于化学传感

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Slanted columnar thin films (SCTFs) are promising anisotropic nanostructures for applications in optical sensing and chemical separation. However, the wide use of SCTFs is significantly limited by their poor mechanical properties and structural stability, especially in liquid media. In this work, we demonstrate the fabrication of solution-stable carbon nanotube (CNT)/graphene hybrid structures based on cobalt SCTFs. The CNT/graphene hybrid structures were synthesized through the use of a titanium underlayer for Co slanted nanopillars as a chemical vapor deposition catalyst, which allows simultaneous growth of CNTs at the Co/Ti interface and three-dimensional graphene over the surface of cobalt. Importantly, the CNT/graphene hybrid structures retain the anisotropy of the parent Co SCTFs and thus remain suitable for optical sensing. Graphene/CNT modification of Co SCTFs not only improves their stability in solutions but also enables their functionalization with pyrene-modified DNA probes, which can be monitored in real time by in situ ellipsometry measurements. In turn, the solution-stable DNA-modified SCTFs may find a wide range of applications in biosensing. The described synthetic approach that allows simultaneous growth of CNTs and graphene by engineering Co/Ti interfaces may also be applied to the fabrication of other kinds of complex CNT/graphene hybrid materials.
机译：倾斜的柱状薄膜（SCTF）是对光学传感和化学分离的应用的各向异性纳米结构。然而，SCTF的广泛使用受到它们的机械性能差和结构稳定性，特别是在液体介质中的差的限制。在这项工作中，我们证明了基于钴SCTFS的溶液稳定的碳纳米管（CNT）/石墨烯杂化结构的制造。通过使用CO倾斜纳米粒子作为化学气相沉积催化剂的钛底层合成CNT /石墨烯杂化结构，其允许在CO / Ti界面和三维石墨烯上同时生长CNT的钴表面。重要的是，CNT /石墨烯混合结构保留了母线SCTF的各向异性，因此保持适合光学感测。 COSCTS的石墨烯/ CNT改性不仅可以提高它们在溶液中的稳定性，而且还可以通过芘改性的DNA探针能够，可以通过原位椭圆测量测量实时监测。反过来，溶液稳定的DNA改性的SCTF可以在生物传感中找到各种应用。所描述的合成方法，允许通过工程CNT和Ti接口同时生长CNT和石墨烯，也可以应用于其他种类的复合CNT /石墨烯混合材料的制造。

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