Researchers in the US have developed a potential new test for the virus that causes Covid-19 using a diamond-based quantum sensor.
MIT的团队使用人工钻石层中的氮空位（NV）中心模拟了高灵敏度传感器。
即使是金标准聚合酶链反应（PCR）测试也可能具有超过25％的假阴性率。相比之下，团队的分析表明，新测试的负数可能低于1％。该测试也可以足够敏感，仅在一秒钟内仅检测几百股病毒RNA。
The new method would involve coating the nanodiamonds containing these NV centres with a material that is magnetically coupled to them and has been treated to bond only with the specific RNA sequence of the virus. When the virus RNA is present and bonds to this material, it disrupts the magnetic connection and causes changes in the diamond’s fluorescence that are easily detected with a laser-based optical sensor.
研究人员说，该传感器仅使用低成本层的人造钻石层，并且可以将设备缩放以立即分析一批样品。可以使用常见的化学过程和材料生产及其RNA调整有机分子的gadolinium涂层，用于读取结果的激光器与廉价，可广泛可用的商业绿色激光指针相当。
尽管这项最初的工作基于证明该系统可以原则上有效的详细数学模拟，但该团队仍在继续致力于将其转化为工作实验室规模的设备以确认预测。研究员Changhao Li说：“我们不知道进行最终演示需要多长时间。”
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The plan is create a basic proof-of-principle lab test, and then to work on ways to optimize the
