Detection and mapping of trace explosives on surfaces under ambient conditions using multiphoton electron extraction spectroscopy (MEES)

Tang, Shisong; Vinerot, Nataly; Fisher, Danny; Bulatov, Valery; Yavetz-Chen, Yehuda; Schechter, Israël

doi:10.1016/j.talanta.2016.04.027

Cited by 21 publications

(13 citation statements)

References 45 publications

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“…It was proved to be more sensitive and more informative than most common optical spectroscopies. [22][23][24][25][26][27] This method can directly be applied to surfaces, without any preparations and preprocessing. Thus far, it was applied to detecting a variety of compounds, including polycyclic aromatic hydrocarbons (PAH), pesticides, pharmaceutical compounds, explosives, and narcotic drugs.…”

Section: Mees Apparatus and Spectramentioning

confidence: 99%

“…MEES is a quantitative analytical spectroscopy, based on detection of photoelectrons extracted in multiphoton process, as a function of laser irradiation wavelength. It was proved to be more sensitive and more informative than most common optical spectroscopies [22][23][24][25][26][27]. This method can directly be applied to surfaces, without any preparations and preprocessing.…”

Section: Introductionmentioning

confidence: 99%

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Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

2021

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In laser multiphoton electron extraction spectroscopy (MEES), the photo-charges extracted from a surface by a pulsed laser beam are recorded as a function of laser wavelength. We report the first application of this spectroscopy to banknotes. Various banknotes from different countries, authentic and counterfeit, have been tested. The results indicate that MEES spectra are both informative (many peaks) and reproducible. The spectra allow for clear distinction between authentic and counterfeit banknotes. Actually, MEES provides a unique fingerprint of the banknotes, so that distinction between various forgery methods (printer used) is also possible.

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Section: Mees Apparatus and Spectramentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

2021

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“…Therefore, the need for rapid and highly selective detection methods for both prevention and forensic identification of these compounds has given rise to an intense activity of research on potential analytical methods. These include mass spectrometry techniques [2] and ion mobility spectrometry, [5] multiphoton electron extraction spectroscopy, [6] or IR laser spectroscopy methods [7] . Portable and selective systems are still under development as those using fluorescence [8–10] and other types of sensors [11–15] .…”

Section: Introductionmentioning

confidence: 99%

Microwave Detection of Wet Triacetone Triperoxide (TATP): Non‐Covalent Forces and Water Dynamics

Blanco

Macario

García‐Calvo

et al. 2020

Chemistry A European J

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The water adducts of triacetone triperoxide (TATP) have been observed by using broadband rotational spectroscopy. This work opens a new way for the gas‐phase detection of this improvised explosive. The observed clusters exhibit unusual water dynamics and rarely observed multicenter interactions. TATP‐H2O is formed from the D3 symmetry conformer of TATP with water lying close to the C3 axis. Water rotation around this axis with a very low barrier gives rise to the rotational spectrum of a symmetric top. The main interaction of the monohydrate is a four‐center trifurcated donor Ow‐H⋅⋅⋅O hydrogen bond, not observed previously in the gas phase, reinforced by a weak four‐center trifurcated acceptor C−H⋅⋅⋅Ow interaction. Surprisingly, all structural signatures show the weakness of these interactions. The complex TATP‐(H2O)2 is formed from the monohydrated TATP by the self‐association of water.

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“…The lack of nitro groups or aromatic moieties makes the detection of this improvised explosive very difficult . TATP is usually detected by mass spectrometry, ion mobility spectrometry, or multiphoton spectroscopy, but the signature of TATP is not clearly visible, except by bulky mass spectrometers . As a consequence, portable and selective systems still need to be developed.…”

Section: Introductionmentioning

confidence: 99%

Solvent‐Free Off–On Detection of the Improvised Explosive Triacetone Triperoxide (TATP) with Fluorogenic Materials

Calvo-Gredilla

García‐Calvo

Cuevas

et al. 2017

Chemistry A European J

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A fluorogenic perylenediimide-functionalized polyacrylate capable of generating color and fluorescence changes in the presence of triacetone triperoxide TATP), an improvised explosive used in terrorist attacks, under solvent-free, solid-state conditions has been developed. The material works by accumulating volatile TATP until it reaches a threshold; therefore, triggering colorimetric and fluorescent responses.

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Detection and mapping of trace explosives on surfaces under ambient conditions using multiphoton electron extraction spectroscopy (MEES)

Cited by 21 publications

References 45 publications

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

Authentication and Testing of Banknotes Using Laser Multiphoton Electron Extraction Spectroscopy (MEES)

Microwave Detection of Wet Triacetone Triperoxide (TATP): Non‐Covalent Forces and Water Dynamics

Solvent‐Free Off–On Detection of the Improvised Explosive Triacetone Triperoxide (TATP) with Fluorogenic Materials

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