自组装玫瑰花结纳米管或可作为微小支架

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图片:图片由普渡大学提供

随着纳米技术这一新兴领域快速发展的成果不断涌现,研究人员创造出自组装分子,这些分子连接在一起形成微小的玫瑰花结状管(见图)。科学家表示,这些新型纳米管可以作为支架,用于各种分子附加物,旨在赋予结构特定的属性。因此,它们可以构成分子导线和纳米级电子设备其他组件的基础,以及药物输送系统的基础。一份详细介绍这些发现的报告今天发表在《美国国家科学院院刊》的早期在线版上。

普渡大学化学家希查姆·芬尼里及其同事表示,在自组装过程中,分子自行组织成六个一组,形成微小的环,然后这些环连接在一起形成管。每个管外部的电荷形成静电带,其他分子可以附着在其上。芬尼里解释说:“通过在结构外部使用不同的化学物质,你可以修改其功能或使其与特定目标结合,例如氨基酸。这就像我们有一个骨架,我们只需要给它穿上衣服。我们可以用各种各样的‘衣服’来装饰这个管。”


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值得注意的是,玫瑰花结纳米管在高温下依然稳定。芬尼里观察到:“这与常识相悖,因为通常当你加热某些东西时,它会分解。我们的实验表明,这些结构在温度的影响下变得越来越稳定,并达到新的自组织水平。” 因此,他说,它们可以帮助开发用于人体内部的纳米级生物医学设备。

Kate Wong is an award-winning science writer and senior editor at 大众科学 focused on evolution, ecology, anthropology, archaeology, paleontology and animal behavior. She is fascinated by human origins, which she has covered for more than 25 years. Recently she has become obsessed with birds. Her reporting has taken her to caves in France and Croatia that Neandertals once called home, to the shores of Kenya's Lake Turkana in search of the oldest stone tools in the world, to Madagascar on an expedition to unearth ancient mammals and dinosaurs, to the icy waters of Antarctica, where humpback whales feast on krill, and on a "Big Day" race around the state of Connecticut to find as many bird species as possible in 24 hours. Kate is co-author, with Donald Johanson, of Lucy's Legacy: The Quest for Human Origins. She holds a bachelor of science degree in biological anthropology and zoology from the University of Michigan. Follow Wong on X (formerly Twitter) @katewong

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