Yes, it is possible to discover and create materials composed of subatomic particles. In fact, scientists have already discovered and studied various exotic materials that are composed of subatomic particles with unique properties.
One example is the discovery of exotic states of matter, such as Bose-Einstein condensates (BECs). A BEC is a state of matter that forms at extremely low temperatures, near absolute zero, when a large number of bosons (particles with integer spin) occupy the same quantum state. This results in a coherent matter wave and collective behavior of the particles. BECs have been observed in atoms, such as rubidium and sodium, which are cooled to ultracold temperatures.
Another example is quark-gluon plasma (QGP), which is a state of matter that occurs at extremely high temperatures and densities. It is formed in heavy-ion collision experiments, where the extreme conditions cause the quarks and gluons that make up protons and neutrons to be liberated from their confined state within atomic nuclei. QGP is believed to have existed in the early universe, shortly after the Big Bang.
Furthermore, there are ongoing efforts to study and create materials with subatomic particles such as muons, neutrinos, and exotic particles like strange and charm quarks. These particles can exhibit unique properties and interactions that can lead to the formation of novel materials.
It's worth noting that the discovery and synthesis of new materials composed of subatomic particles require sophisticated experimental techniques and advanced theoretical understanding. Scientists continue to explore the frontiers of particle physics, quantum mechanics, and condensed matter physics to further our knowledge of subatomic particles and their potential applications in creating new and unusual materials.