Blood Oxygen Measurement: Epidermal Inorganic Optoelectronics for Blood Oxygen Measurement (Adv. Healthcare Mater. 9/2017)

In article number 1601013, Xue Feng and co-workers report a systematic strategy to design an epidermal inorganic optoelectronic device by using specific strain-isolation design, nano-diamond thinning and hybrid transfer printing. This device has similar mechanical properties to epidermis and it is totally conformal to skin and keeps the constant light transmission between emitting element and photodetector as well as the signal stability due to skin deformation. It is also utilized to quantitatively detect human peripheral capillary oxygen saturation and cardiac pulse rate in vitro experiment. This strategy opens a route for traditional inorganic optoelectronics to achieve flexibility and stretchability and improve the performance of optoelectronics for biomedical application.