Assessing the sensing limits of fluorescent dendrimer thin films for the detection of explosive vapors

Shoaee, Safa, Chen, Simon S. Y., Cavaye, Hamish, Smith, Arthur R. G., Burn, Paul L., Gentle, Ian R., Meredith, Paul and Shaw, Paul E. S (2017) Assessing the sensing limits of fluorescent dendrimer thin films for the detection of explosive vapors. Sensors and Actuators B: Chemical, 239 727-733. doi:10.1016/j.snb.2016.08.046

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Author Shoaee, Safa
Chen, Simon S. Y.
Cavaye, Hamish
Smith, Arthur R. G.
Burn, Paul L.
Gentle, Ian R.
Meredith, Paul
Shaw, Paul E. S
Title Assessing the sensing limits of fluorescent dendrimer thin films for the detection of explosive vapors
Journal name Sensors and Actuators B: Chemical   Check publisher's open access policy
ISSN 0925-4005
Publication date 2017-02-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.snb.2016.08.046
Open Access Status File (Author Post-print)
Volume 239
Start page 727
End page 733
Total pages 7
Place of publication Amsterdam, Netherlands
Publisher Elsevier BV
Language eng
Subject 2504 Electronic, Optical and Magnetic Materials
3105 Instrumentation
3104 Condensed Matter Physics
2508 Surfaces, Coatings and Films
2506 Metals and Alloys
2208 Electrical and Electronic Engineering
2505 Materials Chemistry
Abstract Photoluminescence quenching of organic thin films is a promising technique for the detection of vapors from explosives. The photoluminescence quenching response depends on the energetics of electron transfer from the photo-excited sensing material to the analytes, the vapor pressure of the analyte, and the diffusion process of the analytes in the sensing films. It is critical that the performance of a potential sensing material be evaluated in the solid-state with a range of analytes and across a range of vapor concentrations to ensure high sensitivities through non-contact sampling are achievable. We have investigated the photoluminescence quenching of three generations of carbazole-based dendrimers across a range of nitro-containing analyte vapor concentrations, including the TNT by-product 2,4-dinitrotoluene (DNT), and the tagging agent 2,3-dimethyl-2,3-dinitrobutane (DMNB). We show that the performance of all three dendrimer generations in the solid-state is near identical. Furthermore, we show that these dendrimers have a high affinity towards nitroaromatic compounds with parts per billion sensitivity, which makes them ideal for trace-level detection.
Keyword Analyte detection
Photoluminescence quenching
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID DE120101721
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Centre for Organic Photonics and Electronics
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Citation counts: TR Web of Science Citation Count  Cited 3 times in Thomson Reuters Web of Science Article | Citations
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