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

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Text this: Universal one-pot, one-step synthesis of core-shell nanocomposites with self-assembled tannic acid shell and their antibacterial and catalytic activities