A subambient pressure feature for assisting in guidance of storage tape within a tape transport system such as a data storage tape cartridge andor a tape drive. Such reordering is utilized when the time order of received samples are distorted andor corrupted, which can occur in at least three situations. A pressure counteracting member is disposed to resist the biasing force such that the flashback chamber can be held in the ready position without application of any manual force once the tip end has pierced into the skin in search of the vein, and such that blood flow into the needle assembly is facilitated to enable the user to check the introduction of the catheter. The operator of the recovery device is protected by a shield and an exhaust system that minimize the operator’s exposure to airborne biohazardous toxins and enable the sorting to be done without injury to the operator from sharp medical devices. The method comprises diffusing a coating agent in a supercritical fluid between layered particles of a graphite structure defining contacted graphite particles and catastrophically depressurizing the supercritical fluid to form delaminated graphite particles.