Top Countries in Nanotechnology Publications: 5-year H-index vs Number of Nano-articles (2021)

China and the United States rank first and second, respectively, in both the 5-year H-index and the number of nano-articles. However, countries like Australia and Singapore have a higher ratio of highly cited nano-articles to the total nano-articles, making these countries higher in ranking in the 5-year H-index. It is also clear that Ukraine and Ireland rank lowest in this respect.