10:00 〜 10:15
▲ [16a-A307-5] Wearable and stretchable strain sensors for intraocular ocular pressure measurement
キーワード：IOP sensor, stretchable
Intraocular pressure (IOP) is an important factor of diagnosing glaucoma clinically because glaucoma is one of the most important causes of blindness. The common way to measure IOP requires the wire connection between a sensor lens on an eye and a detector, which is not suitable for long term monitoring. Therefore, we develop a wireless, stretchable contact lens sensor for real-time IOP monitoring. The wireless sensor system is similar with our previous works [1-2], consisting of a stretchable antenna for monitoring IOP changes and a reader coil for converting IOP changes to electrical signals.
Here, we developed wearable and stretchable stain sensors: (1) using liquid metal and (2) poly(3,4-ethylenedioxythiophene) (PEDOT)/ polyvinyl alcohol (PVA) composite film. In the process (1), the liquid metal sensor is formed by spray coating. The liquid metal is mixed with the different concentration of carbon nanotubes (CNTs). In the process (2), the PEDOT/PVA sensor is composed of multilayers using 1st layer PDMS substrate, 2nd layer high conductive PEDOT activated with sulfuric acid and 3rd layer PEDOT:PVA to detect the IOP with high sensitivity, biocompatibility and repeatability. The resistance of both sensors was increased by increasing IOP of pig eye ranging from 5 to 50 mmHg (Normal: 10 to 21 mmHg, Glaucoma: over 21 mmHg), so we could demonstrate the possibility for wireless IOP measurement on the lens. In the presentation, we will discuss the details about the experimental setup and the results.
Here, we developed wearable and stretchable stain sensors: (1) using liquid metal and (2) poly(3,4-ethylenedioxythiophene) (PEDOT)/ polyvinyl alcohol (PVA) composite film. In the process (1), the liquid metal sensor is formed by spray coating. The liquid metal is mixed with the different concentration of carbon nanotubes (CNTs). In the process (2), the PEDOT/PVA sensor is composed of multilayers using 1st layer PDMS substrate, 2nd layer high conductive PEDOT activated with sulfuric acid and 3rd layer PEDOT:PVA to detect the IOP with high sensitivity, biocompatibility and repeatability. The resistance of both sensors was increased by increasing IOP of pig eye ranging from 5 to 50 mmHg (Normal: 10 to 21 mmHg, Glaucoma: over 21 mmHg), so we could demonstrate the possibility for wireless IOP measurement on the lens. In the presentation, we will discuss the details about the experimental setup and the results.