  Blood, a ubiquitous and fundamental carbohydrate material composed of plasma,
red blood cells, white blood cells, and platelets, has been playing an
important role in biology, life science, history, and religious study, while
graphene has garnered significant attention due to its exceptional properties
and extensive range of potential applications. Achieving environmentally
friendly, cost-effective growth using hybrid precursors and obtaining
high-quality graphene through a straightforward CVD process has been
traditionally considered mutually exclusive. This study demonstrates that we
can produce high-quality graphene domains with controlled thickness through a
one-step growth process at atmospheric pressure using blood as a precursor.
Raman spectroscopy confirms the uniformity of the blood-grown graphene films,
and observing the half-integer quantum Hall effect in the measured devices
highlights its outstanding electronic properties. This unprecedented approach
opens possibilities for blood application, facilitating an unconventional route
in graphene growth applications.
