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In recent years,atmosphere-pressure cold plasmas were becoming increasingly important in biomaterial and industrial applications such as surface treatment,semiconductor fabrication,thin film deposition,food processing and disinfection for its low surface temperature without complicated vacuum chamber system.Here,various hollow-core optical fiber based atmospheric plasma generators were reported.The micron-size plasmas were formed in the hollow cores of the very long(>1m)optical fibers.The microplasmas may result in a rapid growth of carbon tubes of micron thickness on the inner surface of hollow optical fibres with their maximum growth rates of>2.00μm/min.The microplasmas in contact with water solution is highly efficient for killing various virus in water.