| 초록 |
Bio-integrated electronics have drawn attention for the bio-injectable and bio medical devices. Among them, transient electronics have a remarkable propert that can be dissolved in body. Thus, it is not neccessary to make an incision for removing injectable devices and it can significantly reduce side effects such as infection, damages on body, and embolism. However, lifetime of the transient devices cannot be properly controlled. So, previous researches try to overcome this drawback by regulation of pH condition, passivation layers, and control of thichness. In spite of these efforts, it is still hard to regulate dissolution rate of injecting devices and partial dissolution rate of the devices. Therefore, we suggest new transient material which is based on polysaccharide. Dissolution rate of this polysaccharide material can be precisely controlled by molecular weight of component, and external near infrared heat source. Biocompatibility of devices is confirmed by in-vivo tests, and analytival simulations is used to explain dissolving behavior. |
