Here, we develop a comfortable dental headpiece with aerosol reduction function as shown in Figure 3. This can not only help reduce the air pollution, but also reduce noisevibration, enabling future dental treatment to be safermore pleasant. Air curtain are traditionally used to contain pollutants in large area, here we used the air curtain technology to contain air pollutants in a small area at the sourceadded negative ions to remove air pollutants within. This technology can also be applied to other handheld tool that emits air pollution.

"In this project, the proposed technologies of Environment Sensing Hub including： (1) Air sensing hub：integrate H/T/P sensor, PM 2.5 sensorwireless multiplexing module for system-on-package (SiP)system-on-chip (SoC) (2) Water sensing hub：heavy metal ion sensor (modules integration, startup company), spectrochip (systems integration, startup company)"