In order to allow better information delivery in tracking and tracing, some nano-based products
may be able to encrypt information technology in the form of nanodisks functionalized with dye
molecules to emit a unique light spectrum when illuminated with a laser beam, so that they can
be used as tags for tracking food products (Nam, Thaxton, and Mirkin 2003). A nanobarcode
detection system is being developed that fluoresces under ultraviolet light in a combination of
colours that can be read by a computer scanner (Li, Cu, and Luo 2005). Dip Pen
Nanolithography involves using a scanning probe with a molecule-coated tip to deposit a
chemically engineered ink material to create nanolithographic patterns on the food surface