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             ___     ______      ___      _____   
    ___     / _ \\  |      \\   / _ \\   |__  //  
   /   ||  | / \ || |  --  //  / //\ \\    / //   
  | [] ||  | \_/ || |  --  \\ |  ___  ||  / //__  
   \__ ||   \___//  |______// |_||  |_|| /_____|| 
    -|_||   `---`   `------`  `-`   `-`  `-----`  
     `-`

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Text this: A rocket-like encapsulation and delivery system with two-stage booster layers : pH-responsive poly(methacrylic acid)/poly(ethylene glycol) complex-coated hollow silica vesicles