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Keywords:

  • anti-counterfeiting;
  • DNA;
  • polymerase chain reaction;
  • silicates;
  • sol–gel processes
Thumbnail image of graphical abstract

Tough to remove this label! When protected within a silica sphere, DNA can withstand high temperatures (up to 200 °C) and aggressive radical conditions. Following deprotection with HF, the DNA can be analyzed by standard biochemical methods. This DNA protection/deprotection scheme is compatible with standard polymer processing and can be used for labeling material of nonbiological origin.