Utilizing Different Diffusion Mechanisms for Thin Film Fluorescence-Based Detection and Discrimination of Illicit Drug Vapors

Chen, Ming; Burn, Paul L.; Shaw, Paul E.

doi:10.1021/acssensors.3c01566

Cited by 3 publications

(1 citation statement)

References 31 publications

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“…These dyes are favored for their extensive π-electron delocalization, large molar extinction coefficient, versatile assembling morphology, and tunable photophysical properties through cost-effective chemical modifications. 80,85–89 However, such fluorophores usually suffer from aggregation-caused quenching (ACQ) problems. The π–π stacking, due to their extended planar structures, may lead to quenched solid-state fluorescence and decreased photostability.…”

Section: Molecular Design Of Sensing Fluorophoresmentioning

confidence: 99%

Molecular design and architectonics towards film-based fluorescent sensing

Huang,

Liu,

Peng

et al. 2024

Chem. Soc. Rev.

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Section: Molecular Design Of Sensing Fluorophoresmentioning

confidence: 99%

Molecular design and architectonics towards film-based fluorescent sensing

Huang,

Liu,

Peng

et al. 2024

Chem. Soc. Rev.

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Integrated Sensing Platform Validated for the Efficient and On-Site Screening of Amine-Containing Illicit Drugs

Yao,

Yang,

Wen

et al. 2024

ACS Sens.

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Efficient and reliable technologies for the on-site detection of illicit drugs are important in drug-facilitated crime investigations. However, the development of such technologies is challenging. Based on the synthetic optimization, introducing a boron ester functional group to the two furanic indicators endows the stimulus-responsive properties synergistically. The ring-opening reaction of the indicators in the presence of amine-containing illicit drugs generated well-known donor–acceptor Stenhouse adducts, accompanied by strong color changes. A small-size and lightweight laminated sensor was integrated based on the outstanding ratiometric variations of the two active furanic indicators. A prototype platform was fabricated equipped with a circuit control, a mini pump, and a signal processing system. A user-friendly detection and efficient screening of amine-containing illicit drugs, including phenethylamines, amphetamines, cathinones, and tryptamines in the liquid states were conducted. The ratiometric response of the sensor was linear in the concentration range of 2.1–10.6 μg·mL–1 for methamphetamine·HCl and methcathinone ·HCl. The detection limits for the two illicit drugs at the sublevel (ng·mL–1) were found to be 8.4 and 9.0 ng·mL–1, respectively. Double-blind field tests and different illicit drugs were evaluated with good screening capability. Successful trials showed the potential applications of the developed prototype platform for efficient and on-site analytical determination.

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Non-Destructive Pest Detection: Innovations and Challenges in Sensing Airborne Semiochemicals

Chen,

Yazdani,

Murugappan

2024

ACS Sens.

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Pests, especially invasive ones, pose significant threats to the global ecosystem, crop security, and agriculture economy. Sensing airborne semiochemicals as a nondestructive detection method has been recognized as a promising strategy to detect the presence of these living pests on site. However, sensing airborne semiochemicals in fields is challenging, as they are transmitted in concentrations as low as several nanograms per cubic meter in chemically diverse environments. This low vapor pressure together with similarity in functional groups of pheromones among different species have curtailed the practical deployment of corresponding sensors for real world applications. This review describes the advances in semiochemical detection methods and technologies including traditional analytical instruments, trained animals, and electroantennography with a focus on electronic noses (e-noses). Several key types of volatile organic compound (VOC) sensors used in e-noses are summarized, including their transduction methods, sensing materials, and sensing performance for semiochemical and simulants detection. Notably, it was found that many commercial VOC sensors failed to respond to airborne semiochemicals effectively, leading to a reduced efficiency of enoses. Future work may focus on developing stable and robust sensing materials with higher sensitivity and selectivity to pheromones and understanding the feasibility of the deployment of the sensors under field conditions.

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Utilizing Different Diffusion Mechanisms for Thin Film Fluorescence-Based Detection and Discrimination of Illicit Drug Vapors

Cited by 3 publications

References 31 publications

Molecular design and architectonics towards film-based fluorescent sensing

Molecular design and architectonics towards film-based fluorescent sensing

Integrated Sensing Platform Validated for the Efficient and On-Site Screening of Amine-Containing Illicit Drugs

Non-Destructive Pest Detection: Innovations and Challenges in Sensing Airborne Semiochemicals

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