Highly stretchable and conformal bioinspired kirigami structural epidermal electrodes for ECG recording during daily activities

The conformal adaptation of epidermal electrodes to the skin is crucial for achieving stable electrocardiogram (ECG) signal monitoring during exercise. Here, we present a bioinspired kirigami structured epidermal electrode (BKSEE) specifically designed for dynamic human-machine interfaces. The BKSEE consists of three distinct layers: a copper electrode featuring a bioinspired kirigami structure (BKS), an adhesive film made of polyethylene glycol (PEG) and polydimethylsiloxane (PDMS), and a PDMS anti-adhesion film. This innovative design offers excellent deformability, exceptional microscopic conformability, and stable adhesion. By relying on excellent conformal adaptation of epidermal electrodes to the skin, the BKSEE can effectively adapt to the deformation of skin. It can collect ECG signals in real time and stably during daily activities, and demonstrates remarkable resistance to sweat and motion artifacts.