Spectral investigations on 1000£ banknotes throughout Italian Republic

Imperio, Eleonora; Calò, Eliana; Valli, Ludovico; Giancane, Gabriele

doi:10.1016/j.vibspec.2015.05.004

Cited by 9 publications

(4 citation statements)

References 38 publications

(46 reference statements)

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“…For example, the ultraviolet (UV) radiation is often used to detect the fluorescent features, but it has been shown that the forged banknotes can reproduce the same effect with the emerging of commercially available fluorescent inks [2,3]. In addition, a variety of nonvisual methods have been investigated to provide the chemical information of the banknotes, which include X-ray fluorescence [4,5], laser-induced IR photothermal radiometry [6], mass spectrometry [7][8][9][10][11], Raman [12][13][14], mid-infrared [15][16][17], and near-infrared spectroscopies [3,18]. These techniques are more reliable because they are able to give information on the composition of the inks or papers, even if the banknotes exhibit similar visual or reflectance features.…”

Section: Highlightsmentioning

confidence: 99%

Structural and optical characterization of banknotes using spectral‐domain optical coherence tomography

Wang

et al. 2022

Journal of Forensic Sciences

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Counterfeiting of banknotes is a financial crime that severely affects economic security and social stability [1]. The key to combat banknote counterfeiting crimes is to detect and link the counterfeit banknotes to the counterfeiters, which remains a challenge due to the continuous development of printing technologies and scanner systems. The advanced counterfeiting techniques can vividly reproduce multiple security features, such as security thread, intaglio, serial number, watermark, and microtext. Therefore, it is urgent to

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Section: Highlightsmentioning

confidence: 99%

Structural and optical characterization of banknotes using spectral‐domain optical coherence tomography

Wang

et al. 2022

Journal of Forensic Sciences

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“…The wavenumbers and the bands assignment are collected in Table 2. The Raman bands assignment of the samples is based on general Raman data [27][28][29] , and mainly from related works by Imperio et al 18,30,31 . The spectra are shown as obtained and are illustrated with the stamp picture in Figs.…”

Section: Raman Spectramentioning

confidence: 99%

Raman and X-Ray Fluorescence to Identify Colors of the German Hyperinflation Stamps of the 1923 Collection

Gómez-Jeria

Campos‐Vallette

Carrasco-Flores

et al. 2019

J. Chil. Chem. Soc.

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Colors of a collection set of postage stamps dated 1923 and corresponding to the hyperinflationary period of the German economy were identified with Raman and X-ray fluorescence (XRF) spectroscopies. Molecular systems associated to the blue, green and yellow colours were characterized. Blue colour is Prussian blue (Fe4[Fe(CN)6]3) and the green colour resulted to be a combination of Prussian blue and the yellow/orange pigment (PbCrO4) or a yellow β-naphthol like monoazopigment. The XRF data suggest that ZnO was used as filler.

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“…However, many anti-counterfeiting technologies read extrinsic labels or intrinsic chemical information using non-ionising optical techniques. [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] Perhaps the most well-known class of anti-counterfeiting labels are luminescent security inks, which are commonly applied to bank notes, drivers licences and passports (Fig. 1a-c).…”

Section: [H1] Introductionmentioning

confidence: 99%

Circularly polarized lanthanide luminescence for advanced security inks

2020

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Authenticating products and documents with security inks is vital to global commerce, security and health. Lanthanide complexes are widely used in luminescent security inks due to their unique and robust photophysical properties. Lanthanide complexes can also be engineered to undergo circularly polarised luminescence (CPL), which encodes chiral molecular fingerprints in luminescence spectra that cannot be decoded by conventional optical measurements. However, chiral CPL signals have not yet been exploited as an extra security layer in advanced security inks. This Review introduces CPL and related concepts that are necessary to appreciate the challenges and potential of lanthanide-based CPL-active security inks. We describe recent advances in CPL analysis and read-out technologies that have expedited CPL-active security ink applications. Further, we provide a systematic meta-analysis of strongly CPL-active Eu III , Tb III , Sm III , Yb III , Cm III , Dy III and Cr III complexes, discussing the suitability of their photophysical properties and highlighting promising candidates. We conclude by providing key recommendations for the development and advancement of the field.

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Spectral investigations on 1000£ banknotes throughout Italian Republic

Cited by 9 publications

References 38 publications

Structural and optical characterization of banknotes using spectral‐domain optical coherence tomography

Structural and optical characterization of banknotes using spectral‐domain optical coherence tomography

Raman and X-Ray Fluorescence to Identify Colors of the German Hyperinflation Stamps of the 1923 Collection

Circularly polarized lanthanide luminescence for advanced security inks

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