Thanks h0bby1 for your detailed comment! For me, it is hard to say whether fundamentally something is a particle or a wave. Wave-particle duality tells us that we can't really say one is more fundamental than the other. On the other hand, Quantum Field Theories would tell us that the quantum fields are the fundamental concepts.
RE: Quantum Physics (I): Wave-Particle Duality 量子力學 (一)波粒二象性