Multifunctional ultrastretchable and ultrasoft electronics enabled by uncrosslinked polysiloxane elastomers patterned with rheologically modified liquid metal electrodes: Beyond current soft and stretchable electronics

•Ultrastretchable and ultrasoft electronics via uncrosslinked polysiloxane elastomers patterned with liquid metal electrode.•The electronic devices exhibiting ultrastretchability, ultrasoftness and characteristic surface adhesion.•Rheologically modified liquid metal electrodes patterned by forced-wetting.•The electronic devices utilized for wearable strain sensors, soft heating pad and mountable energy-harvesting device.