▎ 摘　　要

NOVELTY - A luminescent nanocomposite composition comprises graphene oxide or reduced graphene oxide, and at least one luminescent moiety. The luminescent moiety non-covalently interacts with the graphene oxide or reduced graphene oxide. USE - Luminescent nanocomposite composition is used for preparing luminescent film and labeling articles such as electronic components (all claimed), and as luminescent ink for printing confidential data in military, government and private sectors. The luminescent film is used for tagging and tracking waste articles. ADVANTAGE - The luminescent nanocomposite composition has improved mechanical properties and luminescence. The nanocomposite composition is manufactured economically with improved productivity. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) manufacture of luminescent nanocomposite composition, which involves mixing 0.01-1 wt.% graphene oxide or reduced graphene oxide, with preset volume of native lactoferrin or native lactoferrin-protected gold cluster; (2) method of preparing a luminescent film, which involves heating the luminescent nanocomposite composition at 20-70 degrees C, drying the composition to form a film, immersing the film in ammonia solution and washing the film with water, ethanol or methanol to remove ammonia; (3) method of labeling an article of manufacture, with a removable and rewritable label, which involves depositing the luminescent nanocomposite composition on the article; and (4) article, which consists of removable and rewritable label comprising the luminescent nanocomposite composition.