Flexible devices also have a very wide range of applications in biomedicine. For external detection of the human body, the traditional method of stimulating brain electrical signals or heart rhythm is to join electrodes in conductive gel and then attach them to the body surface. This method has many shortcomings. For example, because the gel will gradually dry and lose its viscosity, it cannot be tested for a long time; it is poorly bonded to the human body surface and is easy to slip; and the comfort is low, especially for young people. It is more difficult for patients to use; the process of joining electrodes is relatively cumbersome and time-consuming.

Flexible devices can solve these problems. The soft, thin and flexible device can be very tightly attached to the skin, heart or brain, so as to obtain more accurate body information through the detection of electrical or pressure signals. In addition, the body feels good when worn by the human body, and there will be no obvious discomfort. People can even wear these thin cicada-wing devices 24 hours a day to monitor the body's heartbeat, pulse, blood pressure, brain waves, electrocardiogram and other physical indicators at any time. Long-term monitoring at any time is of great significance to the diagnosis, prevention and timely treatment of cardiovascular and cerebrovascular diseases. If a drug slow-release material is installed in the device, it can even effectively treat diseases. For example, a diabetic patient can wear a flexible material that releases insulin regularly.

The electrohydrodynamic inkjet printing system uses the principle of electrohydrodynamics (EHD) combined with a high-precision motion platform to realize micron/nano dot printing and direct writing of line structures to prepare preset patterns and structures. It breaks through the bottleneck of traditional printing technologies such as inkjet printing and screen printing, and achieves higher resolution, better ink adaptability, and higher degrees of freedom. Suitable for organic/inorganic inks of various viscosities such as liquid metals, polymers, biomaterial polymers, pixel dots, quantum dots, metal nanoparticle inks, nano silver wires, salt solutions, photoresist, carbon nanotubes, graphene , DNA, protein and living cells in the field of biological sciences, etc. Facilitate scientific research and applications in the fields of flexible electronic devices, flexible touch screens, flexible physical signs, solar thin-film batteries, flexible sensors, biological stents, tissue engineering, organic light-emitting diodes, and biosensors.