Use of luminescent nanosystems for authenticating security documents
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United States of America Patent
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Aug 1, 2017
Issued Date -
N/A
app pub date -
Jun 14, 2012
filing date -
Jun 15, 2011
priority date (Note) -
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Abstract
The present invention relates to the use of nanosystems as non deactivable security markers comprising metal atomic quantum clusters (AQCs) of at least two different size distributions encapsulated in a cavity with an inner diameter less than or equal to approximately 10 nm. These nanosystems are luminescence, particularly fluorescence after external excitation. The invention also relates to security documents, articles or elements incorporating these markers as well as to a method and a system for detecting the same.
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International Classification(s)
- B41M:PRINTING, DUPLICATING, MARKING, OR COPYING PROCESS....
- C09K:MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED ....
- B82Y:SPECIFIC USES OR APPLICATIONS OF NANO-STRUCTURES; ....
- G21K:TECHNIQUES FOR HANDLING PARTICLES OR ELECTROMAGNET....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- G07D:SORTING, TESTING, CHANGING, DELIVERING, OR OTHERWI....
- C09D:COATING COMPOSITIONS, e.g. PAINTS, VARNISHES, LACQ....
- B42D:BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER O....
- D21H:PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED....
- G06K:RECOGNITION OF DATA; PRESENTATION OF DATA; RECORD ....
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