  Colloid-based computing devices offer remarkable fault tolerance and
adaptability to varying environmental conditions due to their amorphous
structure. An intriguing observation is that a colloidal suspension of ZnO
nanoparticles in DMSO exhibits reconfiguration when exposed to electrical
stimulation and produces spikes of electrical potential in response. This study
presents a novel laboratory prototype of a ZnO colloidal computer, showcasing
its capability to implement various Boolean functions featuring two, four, and
eight inputs. During our experiments, we input binary strings into the colloid
mixture, where a logical ``True" state is represented by an impulse of an
electrical potential. In contrast, the absence of the electrical impulse
denotes a logical ``False" state. The electrical responses of the colloid
mixture are recorded, allowing us to extract truth tables from the recordings.
Through this methodological approach, we demonstrate the successful
implementation of a wide range of logical functions using colloidal mixtures.
We provide detailed distributions of the logical functions discovered and offer
speculation on the potential impacts of our findings on future and emerging
unconventional computing technologies. This research highlights the exciting
possibilities of colloid-based computing and paves the way for further
advancements.
