Preparation of concealed marks with core-shell luminophores for customs security check system and application thereof

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United States of America

PATENT NO 11232696
SERIAL NO

17389590

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Abstract

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Concealed mark preparation with core-shell luminosphores for customs security check system and application thereof, to address that infrared luminescent materials have not been used in senseless customs clearance field, absorption cross sections of infrared luminescent materials currently available are not big enough, and upconversion luminescence intensity thereof is low, consequently, the luminescent marks are not clear enough to recognize marked abnormal luggage, and provide a following solution: step 1: preparing TiQ2; step 2: preparing Ag@TiO2 composite nanoparticles; step 3: preparing Ag@TiQ2@NaYF4:Yb3+, Er3+ luminescent nanoparticles; step 4: making concealed luggage marks. Ag@TiQ2@NaYF4:Yb3+, Er3+ luminescent nanoparticles according to the present invention has superior luminescent intensity than pure NaYF4:Yb3+, Er3+, and luminescent materials prepared in this method can be disseminated in organic solution such as ethanol and methanol for use in preparing concealed marks to mark susceptible luggage and provides a research direction for senseless, intelligent and safe customs clearance.

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Patent Owner(s)

  • JINLING HAIGUAN TECHNICAL CENTER; JIANGSU YANGTZE TESTING AND CERTIFICATION CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
An, Wei Nanjing, CN 37 245
Chen, Guosong Nanjing, CN 2 2
Chen, Jiansong Nanjing, CN 7 6
Fang, Jing Nanjing, CN 52 343
Gao, Ling Nanjing, CN 11 6
Gao, Rong Nanjing, CN 35 186
Hong, Ying Nanjing, CN 68 2490
Shen, Weijian Nanjing, CN 1 0
Wang, Jinling Nanjing, CN 21 76
Zhu, Yuanyuan Nanjing, CN 6 0

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