The study of the solution plasma is less advanced than that of the low-pressure plasma. Figure 2 summarizes
the chronological development of both the low-pressure and solution plasmas. SPP has several
advantages over low-pressure plasma processing (LPPP). Studies of solution plasma and SPP should
therefore be expedited, since it is expected that technological advances will result in the development
of numerous industrial applications, and will complement parallel developments in LPPP.