  Existing flexible electronics are planar, nonbreathable, and easily damaged.
In this work, authors introduce a new paradigm of free-form three-dimensional
integrated circuits assembled on a single textile thread for ultimate
flexibility. Transistors are assembled as daisy chain on a thread and utilize
deep eutectic solvent gels, or eutectogels as nonvolatile, breathable, and
repairable dielectric for gating organic electrochemical transistor. The
eutectogels provide stable transistor performance without the need for
encapsulation, are air permeable to the skin, and make the Organic Eutectogel
Gated Electrochemical Transistor (OEGET) a promising candidate for wearable
electronics. Complex analog integrated circuits, such as single stage and
multi-stage amplifiers can be realized on a single thread which can bend out of
the plane of stretching for true three-dimensional flexibility. An all-thread
based wearable that uses a thread-based strain sensor and thread-based
integrated circuit for eye motion and respiration monitoring is also presented.
