Water containing suspended nanobubbles is utilized in
many biological and medical applications. For example, nanobubbles
increase the efficiency of drug and gene delivery. Water containing
oxygen nanobubbles is used in wastewater treatment, to promote the
growth of plants and animals, and as a cure for diseases caused by
anaerobic bacteria. The observed lifetime of suspended nanobubbles
is up to several weeks. However, according to the classical theory
of bubble stability, a nanosized bubble should dissolve within
microseconds. This controversy between experiments and theory is
known as the nanobubble paradox.
