Silver phthalocyanine thin films carrying gold, palladium and silver nanoparticles for detection of taggants in explosives

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F17%3A43913737" target="_blank" >RIV/60461373:22340/17:43913737 - isvavai.cz</a>
Result on the web
<a href="https://www.sciencedirect.com/science/article/pii/S0040609016306575" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0040609016306575</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.tsf.2016.10.056" target="_blank" >10.1016/j.tsf.2016.10.056</a>

Result language
angličtina
Original language name
Silver phthalocyanine thin films carrying gold, palladium and silver nanoparticles for detection of taggants in explosives
Original language description
Our work deals with thin films of silver phthalocyanine (AgPc) combined with gold, palladium and silver nanoparticles. These films were applied for the indirect detection of 2-nitrotoluene which is used as a taggant in explosives. The films were deposited by an Organic Molecular Evaporation and a DC magnetron sputtering. The growth of metallic nanoparticles was continuously monitored through in-situ resistance measurements to detect the percolation threshold. We varied composition of the nanoparticles, their amount (the sputtered equivalent thickness was in the range from 1 to 50 nm) and also the geometry of sensing layers: geometry i) bottom AgPc + top nanoparticles, geometry ii) top AgPc layer + bottom nanoparticles. The sensors with geometry i) exhibited good recovery capabilities, those with geometry ii) seemed to better preserve phthalocyanine sensing properties. For the best combination, the AgPc(50 nm)/Au(10 nm) sensor, its dc-response rose to the value of 373 for 190 ppm of 2-nitrotoluene. This suggests that 2-nitrotoluene can be detected in the sub-ppm concentrations by these films.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
21001 - Nano-materials (production and properties)

Project
<a href="/en/project/GA14-10279S" target="_blank" >GA14-10279S: Advanced materials for photovoltaics: substituted phthalocyanine organocomplexes</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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