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科学美国人60秒:智能手机可取代金丝雀成监测气体神器

来源:慢速英语   时间:2020-05-08 16:56:38

Canary out, Smartphone in for Gas Detection

智能手机可取代金丝雀成监测气体神器

Devices that detect potentially hazardous gases or airborne environmental pollutants are out there. But they;re expensive and bulky. Now M.I.T. researchers say they;ve developed a way to get the same detection abilitieswith your smartphone.

虽然有检测潜在有害气体或空气中环境污染物的设备,但它们昂贵且笨重。现在麻省理工学院的研究人员称,他们研究出了一种方法用人们的智能手机来获得相同的检测能力。

\The research team modified what are called near-field communication tags, or NFC tags. Smartphones with NFC capabilities send out magnetic field pulses. The magnetic field creates an electric current on the tag that the phones pick up. Such systems are typically used to track products or drugs.

该研究小组修改了被称为近场通信的标签,即NFC标签。具有NFC功能的智能手机发出磁场脉冲。磁场会在手机所选择的标签上产生电流。这样的系统通常用于跟踪产品或药物。

For the new application, the scientists added links to the circuit made of carbon nanotubes. Each link responds to one particular gas, by changing how the nanotubes conducts electricity. By sensing the change in electric current on the tag, the smartphone signals that it has detected the gas in question.

科学家们将新应用程序链接到碳纳米管制成的电路上。通过改变纳米管的导电方式,使每个链接对应一个特定的气体。通过感应标签上的电流变化,智能手机的信号检测到了有问题的气体。

The method was tested with ammonia, cyclohexanone and hydrogen peroxide. And the tags could sense the substances at levels of a few parts per million. The research is in the Proceedings of the National Academy of Sciences.

该测试方法经氨,环己酮和过氧化氢测验。这些标签可以在百万分之几的几率下感应到化学物质。该研究刊发在《美国国家科学院院刊》上。

Such inexpensive tiny tags require no external power. The scientists say their NFC tag system has the potential to be widely used to monitor gases that can affect health, safety and the environment.

这种廉价的小标签不需要外部电源。科学家表示他们的NFC标签系统有潜力被广泛用于监测那些会影响健康、安全和环境的气体。