High sensitivity and fast detection system for sensing of explosives and hazardous materials

Sun, Yongqiang; Yang, Ke; Liu, Junhong; Zhang, Jinchuan; Zhuo, Ning; Liu, Junqi; Liu, Shuman; Wang, Lijun; Liu, Fengqi; Zhai, Shenqiang

doi:10.1016/j.snb.2022.131640

Cited by 9 publications

(4 citation statements)

References 36 publications

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“…The quantum cascade laser (QCL) [1] , which operates based on sub-band transitions, is an ideal source for mid-tofar infrared radiation. Sharing the advantages of high efficiency, high optical power, and design flexibility in a compact size, QCLs are excellent laser sources in numerous application fields, such as gas sensing [2−5] , infrared spectroscopy [6,7] , medical diagnosis [8] and defense applications [9,10] . The QCL materials typically consist of hundreds of alternating and coupled nanoscale thin InGaAs/InAlAs layers [11] , as depicted in Fig.…”

Section: Introductionmentioning

confidence: 99%

Quantum cascade lasers grown by MOCVD

Sun,

Cui,

Guo

et al. 2023

J. Semicond.

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Sharing the advantages of high optical power, high efficiency and design flexibility in a compact size, quantum cascade lasers (QCLs) are excellent mid-to-far infrared laser sources for gas sensing, infrared spectroscopic, medical diagnosis, and defense applications. Metalorganic chemical vapor deposition (MOCVD) is an important technology for growing high quality semiconductor materials, and has achieved great success in the semiconductor industry due to its advantages of high efficiency, short maintenance cycles, and high stability and repeatability. The utilization of MOCVD for the growth of QCL materials holds a significant meaning for promoting the large batch production and industrial application of QCL devices. This review summarizes the recent progress of QCLs grown by MOCVD. Material quality and the structure design together determine the device performance. Research progress on the performance improvement of MOCVD-grown QCLs based on the optimization of material quality and active region structure are mainly reviewed.

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Section: Introductionmentioning

confidence: 99%

Quantum cascade lasers grown by MOCVD

Sun,

Cui,

Guo

et al. 2023

J. Semicond.

Self Cite

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“…41 Therefore, it is very necessary to detect them from an environmental point of view. 42 Based on the above considerations, we have been working on the synthesis of LMOFs capable of sensitive detection of NACs. In this work, we synthesized novel three-dimensional LMOFs with H 6 TDPAT as the organic linker and Cd 2+ as the metal source.…”

Section: ■ Introductionmentioning

confidence: 99%

“…In addition, they are very hazardous to humans and the environment . Therefore, it is very necessary to detect them from an environmental point of view …”

Section: Introductionmentioning

confidence: 99%

Self-Assembled Cd-MOF Material Supported by a Triazine Skeleton: Stimuli Response to Traces of Nitroaromatics and Amines

Xiao

Wang

You

et al. 2022

Crystal Growth & Design

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As an important chemical raw material, nitro aromatic compounds (NACs) and primary aromatic amines are widely used in the chemical industry. However, they are serious pollutants, which have already threatened human beings and the environment. Therefore, it is critical to develop a simple strategy to detect them. Luminescent metal−organic framework (LMOF) sensors have been promising platforms for sensing NACs and aromatic amines because of stable pore structure, outstanding optical properties, fast response, excellent sensitivity, and low detection limit. In this work, a novel LMOF [Cd 3 (TDPAT)The structure was analyzed in detail and the results showed that Cd-MOF presented a unique hexagonal-petal shape composed of binuclear building blocks [Cd 2 O 13 ] connected by a triazine hexacarboxylic skeleton, which also showed an interesting three-dimensional porous structure. Through fluorescence properties and sensing experiments, we found that it possessed strong fluorescence emission and exhibited an excellent sensitivity for the detection of NACs. It could correspond sensitively to 2,4,6-trinitrophenol (TNP), 2,4dinitrophenol (DNP), p-dinitrobenzene (p-DNB), o-dinitrobenzene (o-DNB), p-nitrophenol phenol (PNP), and o-nitrophenol (ONP). Notably, it exhibited extremely low detection limits for TNP, DNP, and PNP at 0.089, 0.092, and 0.016 μM, respectively. In addition, it could distinguish a class of isomers of primary aromatic amines (OPD, MPD, and PPD) through fluorescence properties experiment and detect OPD and MPD sensitively.

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“…With the urgent need for homeland security, the detection of explosives has recently become a subject of increasing concern. − In this regard, trinitrotoluene (TNT) is a primary military explosive and a major component of unexploded landmines worldwide. , Notably, TNT is extremely toxic and is classified as a level one carcinogen. , In addition, because of the electron-absorbing properties of TNT’s three nitro groups, its aromatic ring is particularly resistant to microbial oxidative attacks and ring cleavage. , Hence TNT persists in the environment, even at low trace levels, polluting millions of hectares of land around the world. , Meanwhile, 3-nitro-1,2,4-triazol-5-one (NTO) is a typical high-energy insensitive explosive, which is neurotoxic and cytotoxic. , Because of the high solubility of NTO, it may enter groundwater through water systems, affecting human health adversely even at considerably low trace levels. , Therefore, the detection of explosives in the environment is extremely important for ensuring environmental quality and protecting human health. − …”

mentioning

confidence: 99%

Utilizing an Automated SERS-Digital Microfluidic System for High-Throughput Detection of Explosives

et al. 2023

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The surface-enhanced Raman scattering (SERS) technique is a promising method for the detection of explosives such as 2,4,6trinitrotoluene (TNT) and 3-nitro-1,2,4-triazol-5-one (NTO) because of its high sensitivity to trace substances. However, most SERS detection processes are often nonautomated as well as exhibit low efficiency and toxic exposure, which often poses potential danger to operators. Herein, we propose the integration of SERS with digital microfluidics (SERS-DMF) for automated, high-throughput, and high-sensitivity detection of explosives. First, we carefully designed a DMF chip comprising 40 drive electrodes and 8 storage electrodes to achieve a high-throughput process. And different concentrations of target molecules, silver nanoparticles (Ag NPs), and salts were loaded into the DMF chip. Then, the droplet aggregation, incubation, and detection processes were automatically controlled using the SERS-DMF platform. In addition, Ag NPs were efficiently aggregated by screening different types and concentrations of salts, resulting in "hotspots" and the SERS effect. With the help of the SERS-DMF platform, two explosive samples were automatically detected with high throughput and high sensitivity. The detection limits of TNT and NTO were 10 −7 and 10 −8 M, respectively. In addition, compared with nonautomatic operations, the SERS-DMF platform exhibited better reproducibility and higher efficiency for the detection of explosives. The proposed SERS-DMF thus has considerable potential as an analytical technique for detecting hazardous substances.

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High sensitivity and fast detection system for sensing of explosives and hazardous materials

Cited by 9 publications

References 36 publications

Quantum cascade lasers grown by MOCVD

Quantum cascade lasers grown by MOCVD

Self-Assembled Cd-MOF Material Supported by a Triazine Skeleton: Stimuli Response to Traces of Nitroaromatics and Amines

Utilizing an Automated SERS-Digital Microfluidic System for High-Throughput Detection of Explosives

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