▎ 摘　　要

NOVELTY - The article has identifying marks e.g. bar code and RFID, that are not visible to a naked eye. The identifying marks are made of nanomaterial e.g. graphene and nanodiamond, that includes a set of semiconducting carbon nanotubes with registered distribution of chiralities. The carbon nanotubes comprise as-produced carbon nanotubes obtained from carbon nanotube synthetic process. A coating covers the identifying marks. The carbon nanotubes comprise a portion of a conductive line in a circuit of the article. The marks are present at different locations within the article. USE - Article e.g. electrical device (claimed) such as gated electrical device. Can also be used as a circuit board, jewelry, automobile, medical device, sporting good, structural component, mirror, lens and an optical filter. ADVANTAGE - The article allows a visible mark to alert an outside entity to which the visible mark needs to be removed to prevent tracking of stolen goods in case of theft. The article readily determines diameter of the carbon nanotubes from a Raman spectrum, so that the carbon nanotube diameters in the identifying mark can serve as level of security against unwanted counterfeiting by an outside entity, while providing improved protection for a manufacturer or supplier against theft and production of counterfeit copies of the article. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for manufacturing an electrical article. DESCRIPTION OF DRAWING(S) - The drawing shows a graph illustrating Raman spectra of carbon nanotube samples that differ slightly in chiral distribution.