Mid-infrared absorption spectroscopic sensor for simultaneous and in-situ measurements of ammonia, water and temperature

Ji, Yongbin; Duan, Kun; Lü, Zhiming; Ren, Wei

doi:10.1016/j.snb.2022.132574

Cited by 20 publications

(13 citation statements)

References 33 publications

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“…[ 133 ] TDLAS detector with DFB laser at 1.51 µm has been demonstrated with effective ammonia detection limit of 0.16 ppm and response time of 184 s. [ 134 ] However, TDLAS with QCL at 10.3 µm has been demonstrated with the minimum detection limit of 8.3 and 30 ppb at 30 and 1 s response time respectively. [ 135 ] The in situ measurement of ammonia has been explored with LPAS and QCL showed detection limit of 7 ppb at 9.06 µm with response time of 100 s. [ 136 ] In contrast, LPAS with QCL at 10.34 µm has been demonstrated with 74 ppb detection limit at environmental atmosphere. [ 137 ]…”

Section: Applications Of Ir Breath Analysis Over Biomarkersmentioning

confidence: 99%

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Ranu,

Rahman

et al. 2023

Advanced Sensor Research

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Exhaled breath analysis is considered an effective tool for diagnosing the patient's metabolic status because of its non‐invasive nature. Gas chromatography‐mass spectrometry (GC‐MS) and other mass spectrometry techniques are widely used for exhaled breath analysis. Nevertheless, the requirement of a handheld device for real‐time analysis and rapid processing time of multiple samples leads to advancing infrared (IR) based breath gas sensing techniques. Herein, the IR gas sensing technologies are discussed with a focus on non‐dispersive infrared (NDIR), photoacoustic (PAS), and tunable diode laser absorption spectroscopy (TDLAS) gas sensing technologies because of their highly selective gas detection among compound gases (mixture of VOCs), as well as their corresponding sensing mechanisms and characteristics, for real‐time monitoring of exhaled biomarkers. Carbon dioxide, acetone, ammonia, nitric oxide, methane, and ethylene are the significant biomarkers elaborated in this work with their respective clinical applications and the significance of non‐invasive real‐time monitoring using IR detectors. Challenges in selectivity and clinical trials leads to focus on this review. Current market analysis, present status of different techniques to detect specific biomarkers and other challenges with their possible solutions discussed in this review aid in developing highly selective IR‐based handheld breath VOC analyzers for early diagnosis and screening.

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Section: Applications Of Ir Breath Analysis Over Biomarkersmentioning

confidence: 99%

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Ranu,

Rahman

et al. 2023

Advanced Sensor Research

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“…A conventional mercury thermometer has a long response time and can only measure the temperature at a single point, which cannot meet the requirements at present of precision medicine [ 11 , 12 ]. An infrared thermometer can measure the temperature of the human body’s surface in real time, but it is expensive [ 13 , 14 , 15 ] and can only measure the temperature of the exposed body surface. Furthermore, the measurement results are easily affected by the environment [ 15 , 16 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Temperature Sensors with High-Performance Uniformity through Thermal Annealing

Liu

Xie

et al. 2023

Materials

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It is considered to be of great significance to monitor human health and track the effect of drugs by measuring human temperature mapping through flexible temperature sensors. In this work, we found that the thermal annealing of flexible temperature sensors based on graphite–acrylate copolymer composites can not only improve the temperature coefficient of resistance (TCR) values of the devices, but also greatly improve the uniformity of the performance of the devices prepared in parallel. The best results were obtained when the devices were annealed at 100 °C, which is believed to be due to the rearrangement of graphite particles to generate more uniform and numerous conductive channels within the conductive composite. We believe this finding might promote the practical development of flexible temperature sensors in body temperature sensing for health maintenance and medical applications.

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“…Infrared sensors are another type of sensor used for ammonia detection [16]. These sensors detect ammonia through the absorption of infrared radiation.…”

Section: Introductionmentioning

confidence: 99%

“…They are widely used due to their fast response time, sensitivity, and ease of use. For example, a mid-infrared laser-based absorption sensor was developed for in-situ and simultaneous detection of ammonia, water, and temperature [16]. This ammonia sensor showed a detection limit of 7 ppb [16].…”

Section: Introductionmentioning

confidence: 99%

“…For example, a mid-infrared laser-based absorption sensor was developed for in-situ and simultaneous detection of ammonia, water, and temperature [16]. This ammonia sensor showed a detection limit of 7 ppb [16]. In another research, a microfiber Bragg grating (MFBG) was used to detect ammonia gas directly with ultrahigh sensitivity and without the possible interference of volatile organic compounds [17].…”

Section: Introductionmentioning

confidence: 99%

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Sensitive and Reversible Ammonia Gas Sensor Based on Single-Walled Carbon Nanotubes

Machín¹,

Cotto²,

Duconge³

et al. 2023

Preprint

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The present study reports on the fabrication and performance of ammonia sensors based on single-walled carbon nanotubes (SWCNTs) coated with gold nanoparticles (AuNPs). The sensors were subjected to controlled concentrations of ammonia at two temperatures, namely 25 oC and 140 oC, and their response was monitored through successive cycles of ammonia exposure and nitrogen purging. The results demonstrate that the sputtering-based deposition of AuNPs on SWCNTs led to the best sensor performance, characterized by a rapid increase in resistance values upon exposure to ammonia, and efficient recovery at 140 oC. By contrast, the sensor with chemically impregnated AuNPs exhibited a slower response time. Furthermore, a novel device was developed that combined MoS2-AuNPs (sputtering)-SWCNTs, and it showed improved sensor performance compared to the devices with only AuNPs. Overall, the study provides valuable insights into the fabrication and optimization of SWCNT-based ammonia sensors for various applications, especially for detecting and quantifying small amounts of ammonia (concentrations below 1 ppm).

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Mid-infrared absorption spectroscopic sensor for simultaneous and in-situ measurements of ammonia, water and temperature

Cited by 20 publications

References 33 publications

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Infrared Non‐Invasive Exhaled Biomarker Sensing: A Review

Fabrication of Temperature Sensors with High-Performance Uniformity through Thermal Annealing

Sensitive and Reversible Ammonia Gas Sensor Based on Single-Walled Carbon Nanotubes

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