Abstract: The present invention relates to fiber jamming systems capable of tuning tensile stiffness of soft systems within seconds without the use of high voltage or temperature changes. The systems employ segmented fibrils of interspersed segments of stretchable and non-stretchable materials. Applying a vacuum to the fibrils in an enclosed volume elicits a large interfacial shear resistance to tensile displacement. In the absence of a vacuum, the fibrils are free to stretch and bend in any direction.

Abstract: The present invention relates to fiber jamming systems capable of tuning tensile stiffness of soft systems within seconds without the use of high voltage or temperature changes. The systems employ segmented fibrils of interspersed segments of stretchable and non-stretchable materials. Applying a vacuum to the fibrils in an enclosed volume elicits a large interfacial shear resistance to tensile displacement. In the absence of a vacuum, the fibrils are free to stretch and bend in any direction.

Abstract: A biphasic composition comprises a quantity of liquid GaIn and a plurality of solid particles of Ga2O3 suspended in the quantity of liquid GaIn, the Ga2O3 particles having a median particle size between 8 ?m and 25 ?m, wherein the volumetric ratio of solid particles of Ga2O3 to liquid GaIn is between 0.4 and 0.7. A method of making a biphasic composition of GaIn, a method of making a stretchable circuit board assembly, and a stretchable circuit board assembly are also described.

Abstract: Provided are biphasic compositions including a quantity of a conductive liquid and a plurality of a particulate suspended in the quantity of conductive liquid, wherein there is sufficient wetting between the solid particles and the conductive liquid and wherein the resistance of the compositions are less than the resistance for a bulk conductor when strained as defined by Pouillet's law. Also provided are stretchable circuit board assemblies including the biphasic compositions and methods of using the stretchable circuit board assemblies including the biphasic compositions.

Abstract: A biphasic composition comprises a quantity of liquid GaIn and a plurality of solid particles of Ga2O3 suspended in the quantity of liquid GaIn, the Ga2O3 particles having a median particle size between 8 ?m and 25 ?m, wherein the volumetric ratio of solid particles of Ga2O3 to liquid GaIn is between 0.4 and 0.7. A method of making a biphasic composition of GaIn, a method of making a stretchable circuit board assembly, and a stretchable circuit board assembly are also described.