Gallium liquid metal alloys (GaLMA) are one of the key components of emerging technologies in reconfigurable, flexible, and printable electronics. Surface properties of GaLMA play important roles in its application in reconfigurable devices, such as tunable radio frequency antennas and electronic swilches. Reversible flow of GaLMA in microchannels of these types of devices is hindered by the presence of an oxide skin that forms spontaneously in ambient environment. The oxide film sticks to most surfaces leaving unwanted residues behind that can cause undesired electronic properties. This presentation describes a novel method that enables the movement of gallium liquid metal alloys through microfluidic channels without leaving any metallic residues on the channel walls. An interface modification layer (alkyl phosphonic acids) was introduced into the microfluidic system and the modified surface chemistry of the liquid metal was characterized by surface spectroscopy and microscopy methods.
Physical Sciences and Mathematics | Physics
Ilyas , N. (2015). Controlling Surface Chemistry of Liquid Metals to Enhance their Fluidic Properties. .