Gangwar, Amit Kumar and Gupta, Ashish and Kedawat, Garima and Kumar, Pawan and Singh, Bhanu Pratap and Singh, Nidhi and Srivastava, Avanish K. and Dhakate, Sanjay R. and Gupta, Bipin Kumar (2018) Highly Luminescent Dual Mode Polymeric Nanofiber-Based Flexible Mat for White Security Paper and Encrypted Nanotaggant Applications. Chemistry - A European Journal , 24 (38). pp. 9477-9484. ISSN 0947-6539

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Abstract

Increasing counterfeiting of important data, currency, stamp papers, branded products etc., has become a major security threat which could lead to serious damage to the global economy. Consequences of such damage are compelling for researchers to develop new high-end security features to address full-proof solutions. Herein, we report a dual mode flexible highly luminescent white security paper and nanotaggants composed of nanophosphors incorporated in polymer matrix to form a nanofiber-based mat for anti-counterfeiting applications. The dual mode nanofibers are fabricated by electrospinning technique by admixing the composite of NaYF4:Eu3+@NaYF4:Yb3+, Er3+ nanophosphors in the polyvinyl alcohol solution. This flexible polymer mat derived from nanofibers appears white in daylight, while emitting strong red (NaYF4:Eu3+) and green (NaYF4:Yb3+, Er3+) colors at excitation wavelengths of 254 nm and 980 nm, respectively. These luminescent nanofibers can also be encrypted as a new class of nanotaggants to protect confidential documents. These obtained results suggest that highly luminescent dual mode polymeric nanofiber-based flexible white security paper and nanotaggants could offer next-generation high-end unique security features against counterfeiting.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Wiley.
Subjects:	Chemistry
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	17 Dec 2019 08:22
Last Modified:	17 Dec 2019 08:22
URI:	http://npl.csircentral.net/id/eprint/3795

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