發送短信

數:

提供者:

CAPTCHA:

 ______      ___      ____      _____     ______  
|      \\   / _ \\   |  _ \\   |  ___||  /_____// 
|  --  //  / //\ \\  | |_| ||  | ||__    `____ `  
|  --  \\ |  ___  || | .  //   | ||__    /___//   
|______// |_||  |_|| |_|\_\\   |_____||  `__ `    
`------`  `-`   `-`  `-` --`   `-----`   /_//     
                                         `-`

Please enter what you see:

發送短信 : Field emission cathode based on three-dimensional framework carbon and its operation under the driving of a triboelectric nanogenerator