![]() ![]() The most obvious approach to address these issues would be to make more complex and sophisticated barcodes. ![]() There are some issues arising with the spreading trend of barcodes, such as information leakage caused by 2D barcode cracking and identity theft caused by forging 2D barcodes. Introduction As the popularity of barcodes has spread from Asia to America and Europe, 1 people's daily activities have become more dependent on 2D barcodes, such as identification, authentication, login and so on. These invisible 2D barcodes provide a feasible solution for personal information protection and fit with a patient's privacy protection scenario very well, as we have demonstrated. The invisible patterns can and will only be accessed and recognized under UV light illumination to protect personal private information. We have employed a typical micro-emulsion method to fabricate polystyrene (PS) fluorescent nanoparticles due to its simplicity. This approach provides a promising solution to address the previous problem by transferring 2D barcodes into an invisible state. In order to prevent potential privacy violation and sensitive information leakage through easy access of those visible 2D barcodes, we have designed and fabricated invisible 2D barcodes that will only be visible under UV illumination. This issue is mainly due to the visibility of 2D barcodes. The most urgent and representative problem is decryption, which may lead to serious information leakage and substantial damage to organizations, such as governments and international enterprises. However, relevant issues have emerged as their popularity has soared. The current film can be applied as a transparent photochromic security barcode for anticounterfeiting applications and smart packaging.įluorescence photochromism polyvinyl alcohol/carboxymethyl cellulose nanocomposite smart label strontium aluminate superhydrophobic.The popularity of 2D barcodes is playing a key role in simplifying people's daily life activities, such as identification, quick payment, checking in and checking out, etc. LdA-loaded PVA/CMC films demonstrated antibacterial activity between poor, good, very good, and outstanding as the percentage of LdA in the film matrix increased. As a result, numerous anticounterfeiting products can benefit from the current label for a better market. The current strategy reported the development of a photochromic smart label that is transparent, cost effective, and flexible. The films showed a quick and reversible photochromic response without fatigue. Both ultraviolet (UV) light protection and antibacterial activity were also investigated. As a result of increasing the phosphor ratio, improved superhydrophobic activity was achieved as the contact angle was increased from 126.1° to 146.0° without affecting the film's original physical and mechanical properties. Fluorescence peaks were detected at 365 and 519 nm to indicate a colour change to green. Different ratios of the LdA were physically dispersed in the PVA/CMC nanocomposite label film to provide photochromic, ultraviolet protection, antimicrobial activity, and hydrophobic properties. The lanthanide-doped aluminate (LdA) was prepared in the nanoparticle form to indicate diameters of 35-115 nm. In this context, we devised a straightforward preparation of a luminescent polyvinyl alcohol/carboxymethyl cellulose (PVA/CMC) nanocomposite to function as a transparent labelling film. Products with smart photochromic and fluorescence properties can change colour and emission spectra responding to a light source. Therefore, there are increasing demands for the production of easy-to-recognize and difficult-to-copy anticounterfeiting materials. Forgery and low-quality products pose a danger to society. ![]()
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