论文标题
微热仪执行器作为2D材料的应变工程的多功能平台
Microheater actuators as a versatile platform for strain engineering in 2D materials
论文作者
论文摘要
我们提出了微生物的热致动器，以在二维（2D）材料中设计双轴应变。这些执行器基于具有高热膨胀系数的聚合物表面上的微热器电路。通过通过微调器运行电流可以改变聚合物的温度，并诱导其表面受控的双轴膨胀。这种受控的双轴膨胀可将双轴应变转换为2D材料，并放在聚合物表面上，进而诱导光谱的变化。我们的热应变致动器可以达到0.64％的最大双轴应变，并且可以以高达8 Hz的频率进行调节。这些执行器的紧凑几何形状导致可忽略不计的空间漂移为0.03 um/deg，从而促进了它们在光谱测量中的整合。我们说明了该应变工程平台使用单层MOS2制造应变的光学调制器的潜力。
We present microfabricated thermal actuators to engineer the biaxial strain in two-dimensional (2D) materials. These actuators are based on microheater circuits patterned onto the surface of a polymer with a high thermal expansion coefficient. By running current through the microheater one can vary the temperature of the polymer and induce a controlled biaxial expansion of its surface. This controlled biaxial expansion can be transduced to biaxial strain to 2D materials, placed onto the polymer surface, which in turn induces a shift of the optical spectrum. Our thermal strain actuators can reach a maximum biaxial strain of 0.64 % and they can be modulated at frequencies up to 8 Hz. The compact geometry of these actuators results in a negligible spatial drift of 0.03 um/deg, which facilitates their integration in optical spectroscopy measurements. We illustrate the potential of this strain engineering platform to fabricate a strain-actuated optical modulator with single-layer MoS2.
