Coupling-independent, Real-time Wireless Resistive Sensing through Nonlinear PT-symmetry

Mechanical characterization of cells and microspheres sorted by acoustophoresis with in-line resistive pulse sensing

Resistive Pulse Sensing (RPS) is a key label-free technology to measure particles and single-cell size distribution. As a growing corpus of evidence supports that cancer cells exhibit distinct mechanical phenotypes from healthy cells, expanding the method from size to mechanical sensing could represent a pertinent and innovative tool for cancer research. In this paper, we infer the cells compressibility by using acoustic radiation pressure to deflect flowing cells in a microchannel, and use RPS to sense the subpopulations of cells and particles at each acoustic power level. We develop and vali…

An 860 MHz Wireless Surface Acoustic Wave Sensor with a Metal-Organic Framework Sensing Layer for CO2 and CH4

Wireless and passive surface acoustic wave (SAW) devices with nanoporous metal-organic framework (MOF) sensing layers are attractive gas sensors for applications in many fields such as energy industries and air pollution control. Here, we report on enhancing the sensitivity and detection limit of zeolitic imidazolate framework-8 (ZIF-8) MOF-coated SAW reflective delay line mass sensors by increasing the operating frequency for sensitive detection of carbon dioxide (CO2) and methane (CH4) at ambient conditions. In particular, we show at least four times higher sensitivity of an 860 MHz (4-μm pe…

探索用于细粒度液体识别的量子传感

Exploring quantum sensing for fine-grained liquid recognition

本文将量子接收器引入无线传感系统以降低热噪声，提出双比值方法消除液体体积、距离和容器影响，实现超99.9%的17种液体识别准确率及99.0%的牛奶pH值监测准确率。

用于热传感和航空测绘的无线回音壁模式传感器

Wireless whispering-gallery-mode sensor for thermal sensing and aerial mapping

物联网（IoT）采用大量空间分布的无线传感器来监测物理环境，例如，温度、湿度和气压的测量已经在环境监测、医疗保健监测、智慧城市和精准农业等领域得到了广泛的应用。无线传感器可以收集、分析和传输其环境的测量结果。迄今为止，物联网中使用的无线传感器主要基于在许多情况下可能遭受电磁干扰的电子设备。光学传感器不受电磁干扰的影响，在恶劣的环境中具有显著的优势。此外，通过引入光学谐振来增强光与物质的相互作用，基于谐振器的光学传感器具有体积小、灵敏度高和功能多样等优点，可以显著提高无线传感器的性能和灵活性。在这里，我们提供了第一个示范的无线光子传感器节点的基础上耳语画廊模式（WGM）的光学谐振器。传感器节点通过定制的iOS应用程序进行控制，并在两个实际场景中研究了其性能：（1）12小时以上的空气温度实时测量和（2）安装在无人机上的传感器节点的温度分布的航空测绘。我们的工作展示了WGM光学传感器在实际应用中的能力，并可能为物联网中WGM传感器的大规模部署铺平道路。

用于无线振动传感的无源机械振动处理器

Passive Mechanical Vibration Processor for Wireless Vibration Sensing

提出一种基于共振的完全无源机械振动处理装置，可将无线振动测量灵敏度提升10倍以上，实现实时滤波与表面编辑，且频率可调范围广。

氧化石墨烯GHz介电常数及其在无线湿度传感中的应用

Graphene oxide dielectric permittivity at GHz and its applications for wireless humidity sensing

氧化石墨烯的相对介电常数，其实部和虚部，已被测量在各种湿度条件下在GHz。它表明，相对介电常数随着湿度的增加而增加，由于水分的吸收。氧化石墨烯的这种电特性被用于通过用氧化石墨烯层涂覆印刷的石墨烯天线来创建无电池无线射频识别（RFID）湿度传感器。这种氧化石墨烯/石墨烯天线的谐振频率以及反向散射相位变得对周围湿度敏感，并且可以由RFID读取器检测到。这使得无电池无线监测本地湿度与数字识别附加到任何位置或项目，并铺平了道路，为物联网应用的低成本高效传感器。