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Temporal and spatial programming in soft composite hydrogel objects

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Academic year: 2020

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Figure

Figure 
   1 
   Schematic 
   describing 
   the 
   behaviour 
   of 
   ionically 
  cross-­‐linked 
   hydrogel 
  objects: 
   (1) 
  the 
  semi-­‐permeable 
   soft 
  object 
   converts 
   the 
   fuel 
   source, 
   urea, 
  to 
  ammonia, 
  
Figure 
   3 
  A 
  continuous 
  soft 
  object 
  is 
  formed 
  from 
  both 
   inactive 
  (white) 
  regions 
  that 
  contain 
  no 
  urease, 
  and 
  active 
  regions 
   (coloured) 
  that 
  contain 
  urease 
  at 
  a 
  concentration 
  
Figure 
   4 
   and 
   the 
   supporting 
   video 
   demonstrate 
   time 
   and 
   spatial 
  programming 
  in 
  a 
  millimetre-­‐sized 
  soft 
  object 
  that 
  make 
  use 
  of 
  this 
  O 
   in 
   vegetable 
   oil) 
   and 
   urease

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