Nanotechnology Publications: Number and Annual Growth Rate of Nano-articles in the Past 20 Years

Although the number of nanotechnology publications has grown by more than 750 percent during the last 20 years, the graph of the annual growth rate shows a descending trend. It is despite the fact that the nano-articles include only 9% of the total WOS indexed articles. Is the nanoscience publication close to reaching its saturation stage?