Inkjet Printing of Lanthanide–Organic Frameworks for Anti-Counterfeiting Applications

Luz, Leonis Lourenço da; Milani, Raquel Fernanda; Felix, Jorlandio F.; Ribeiro, I. R. B.; Talhavini, Márcio; Neto, Brenno A. D.; Chojnacki, Jarosław; Rodrigues, Marcelo O.; Júnior, Severino Alves

doi:10.1021/acsami.5b06301

Cited by 162 publications

(102 citation statements)

References 55 publications

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“…Inkjet printing has also been used in the production of polymeric liquid crystalline optical films showing genuine polarisation effects that can be applied, as disclosed by Moia and Johnson, to the protection of documents or goods [240]. These liquid crystalline prints are only visible under special observation conditions using polarisers, acting as anti-counterfeiting features, as luminescent marks, that can also be obtained by inkjet printing, and are visible under certain light excitation conditions [241,242,243,244,245]. …”

Section: Inkjet Printing Of Self-organizing Materials: Liquid Crysmentioning

confidence: 99%

Inkjet Printing of Functional Materials for Optical and Photonic Applications

et al. 2016

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Inkjet printing, traditionally used in graphics, has been widely investigated as a valuable tool in the preparation of functional surfaces and devices. This review focuses on the use of inkjet printing technology for the manufacturing of different optical elements and photonic devices. The presented overview mainly surveys work done in the fabrication of micro-optical components such as microlenses, waveguides and integrated lasers; the manufacturing of large area light emitting diodes displays, liquid crystal displays and solar cells; as well as the preparation of liquid crystal and colloidal crystal based photonic devices working as lasers or optical sensors. Special emphasis is placed on reviewing the materials employed as well as in the relevance of inkjet in the manufacturing of the different devices showing in each of the revised technologies, main achievements, applications and challenges.

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Section: Inkjet Printing Of Self-organizing Materials: Liquid Crysmentioning

confidence: 99%

Inkjet Printing of Functional Materials for Optical and Photonic Applications

et al. 2016

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“…34 Luz et al printed photoluminescent lanthanide-organic frameworks onto plastic and paper foils for anti-counterfeit applications. 35 However, both studies inkjet printed precursor solutions and an additional curing or post-processing step was required to obtain the patterned MOF thin films; such processes strongly restrict the types of MOFs that can be printed. Another rational strategy for fabricating inkjet printed MOF thin films, which has not been reported previously, is preparing a welldispersed suspension of as-synthesized MOF crystals and utilizing it as the ink for inkjet printing directly.…”

Section: Introductionmentioning

confidence: 99%

Inkjet-printed porphyrinic metal–organic framework thin films for electrocatalysis

Kung

Chang

et al. 2016

J. Mater. Chem. A

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In this study, a simple and effective direct inkjet printing method was developed to prepare porphyrinic metal-organic framework (MOF) thin films for electrocatalysis. First, crystals of a zirconium-based porphyrinic MOF (MOF-525) with crystal sizes ranging from 100 to 700 nm were synthesized by adjusting the content of benzoic acid in the solvothermal synthetic process. The synthesized crystals showed similar surface area of 2500 m 2 /g with a unique pore size of 1.85 nm. However, some structural defects was found in the smallest crystals of 100 nm due to the fast crystallization process. After suspended in dimethylformamide, the MOF crystal suspensions were inkjet printed to fabricate uniform MOF-525 thin film patterns. With the help of great precision in liquid deposition, thicknesses of the printed MOF-525 thin films can be accurately controlled by the number of printed layers. With smaller crystal size, the printed MOF thin films showed more compact stacking and better contact with the substrate. The printed MOF thin films were applied for electrocatalytic nitrite oxidation. The effects of both film thickness and crystal size on printed film morphology and electrocatalytic activity were investigated in details. The printed MOF nitrite sensor showed a great detection limit of 0.72 μM and a high sensitivity of 40.6 μA/mM-cm 2 . In summary, this study demonstrated the feasibility of the proposed printing process for electrochemically addressable MOF thin films and can be further applied for many other electrochemical applications.

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“…Functional materials because of their unique optical properties offer improved security features due to the difficulty related to duplicate of their unique functions especially the colorimetric approach for authentication is of great interest as visible security features on banknotes, documents, etc. A library of materials, including lanthanides, [21][22][23][24][25][26] organic dyes, [27][28][29] conjugated polymer dots, [30] quantum dots, [31][32][33][34][35] carbon dots, [36][37][38][39] metal-organic frameworks (MOFs), [40][41][42][43][44] etc., have been explored with their respective technologies to serve the purpose. All the abovecited categories have some pros and cons [45] such as photo-stability, toxic nature, low emission property, emission at wide wavelength range, etc.…”

Section: Introductionmentioning

confidence: 99%

Stimuli‐Responsive Naphthalene Diimide as Invisible Ink: A Rewritable Fluorescent Platform for Anti‐Counterfeiting

Kalita

Malik²,

Sarma

2020

Chemistry An Asian Journal

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Herein, we report an approach to combat counterfeiting and storage of valuable information based on the solid‐state fluorescence switching behavior of isoniazid functionalized naphthalene diimide (ISO_NDI) in response to an external stimuli (i. e., HCl vapor). The unique feature of ISO_NDI is further utilized to develop an invisible ink (ISO_NDI‐PVA) with commercial polymer polyvinyl alcohol (PVA). A solid‐state fluorescence recovery was observed while loading with HCl vapors. This exclusive property of the material could be applied directly as a security ink for confidential data storage purpose. Based on above strategy, we successfully realized the rewritable application by using ISO_NDI‐PVA ink and confirm its practical efficacy on various substrates by creating different patterns. The solid‐state fluorescence switching behavior of ISO_NDI‐PVA ink exhibited reversible on/off signal for multiple cycles under the influence of HCl/NH3 vapors. Mechanistic investigation supports a clear participation of intermolecular charge transfer (ICT) phenomenon in the solid‐state fluorescence switching property. The ease of fabricating the ink with invisible to visible characteristics in response to HCl vapors provides new opportunities for exploring the application of ISO_NDI‐PVA as invisible ink for targeted security applications.

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Inkjet Printing of Lanthanide–Organic Frameworks for Anti-Counterfeiting Applications

Cited by 162 publications

References 55 publications

Inkjet Printing of Functional Materials for Optical and Photonic Applications

Inkjet Printing of Functional Materials for Optical and Photonic Applications

Inkjet-printed porphyrinic metal–organic framework thin films for electrocatalysis

Stimuli‐Responsive Naphthalene Diimide as Invisible Ink: A Rewritable Fluorescent Platform for Anti‐Counterfeiting

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