Abstract: The single-detector spectrometers based on 2D layer van der Waals (vdW) heterojunctions offer advantages in spectral reconstruction due to their high sensitivity, tunable optical properties, ...

Sperm cells are made in the testicles and carry the father's genetic material. A sperm cell has a head, neck, and tail to help it reach and fertilize the egg. Around 300 million sperm are released ...