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空气检测精度提升1000倍 石墨烯传感器诞生

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2016-05-02 21:50:32 转载来源: 网络整理/侵权必删

英国南安普顿大学和日本先进科学技术研究所的科学家研发了一种以石墨烯为原材料的传感器,能检测出室内空气污染且精度极高。这一研究近日发表在《科学进展》期刊上

英国南安普顿大学和日本先进科学技术研究所的科学家研发了一种以石墨烯为原材料的传感器,能检测出室内空气污染且精度极高。这一研究近日发表在《科学进展》期刊上。

新研发的传感器可以感应到来自建筑、家具用品的二氧化碳分子以及挥发性有机化合物(VOC)气体分子。

石墨烯传感器诞生:空气检测精度提升1000倍

近年来,由个人居住环境中的空气污染引起的健康问题与日俱增。这些有害化学气体的浓度水平一般在几十亿分之一(ppb),用现有的环境传感技术难以检测到,因为这些传感器只能检测到浓度为百万分之一(ppb)的此类气体。

该研究团队研发出的石墨烯传感器在通电后,可使单个的二氧化碳分子一个一个吸附到石墨烯材料上,并在分子水平上检测其浓度。

其具体方法是,通过监测石墨烯材料的电阻值,石墨烯材料对二氧化碳分子的吸附和释放会以电阻“量子化”波动的形式被检测到。在实验中,研究人员只花费了几分钟就检测到浓度约为30ppb的二氧化碳气体。

石墨烯传感器诞生:空气检测精度提升1000倍

标签: 空气 检测 精度 提升 1000倍 石墨 传感器 诞生


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