Aluminum-based self-powered hyper-fast miniaturized sensor for breath humidity detection

Bošković, Marko V.; Sarajlić, Milija; Frantlović, Miloš; Smiljanić, M.; Randjelović, Danijela; Zobenica, Katarina Cvetanović; Radović, Dana Vasiljević

doi:10.1016/j.snb.2020.128635

Cited by 16 publications

(16 citation statements)

References 47 publications

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“…In order to make the sensor sensitive to moisture, the activation procedure must be performed [ 16 ]. Before activation, the sensor was providing no output when subjected to high water vapor concentration.…”

Section: Methodsmentioning

confidence: 99%

“…In our previous work, we developed a full-self-powered humidity sensor for breath humidity detection based on electrochemical interaction between aluminum electrodes and water vapor [ 16 ]. Given the importance of breath examination in modern medicine, this work offered a promising device for self-powered breath testing [ 17 , 18 ].…”

Section: Introductionmentioning

confidence: 99%

“…The sensor was designed as an interdigitated capacitor (IDC) made of a thin aluminum film. The proposed sensing principle of the sensor is based on the reaction between aluminum and oxygen dissolved in water on its surface, similar to aluminum–air batteries [ 16 , 19 , 20 ]. In this report, we investigate in detail the principle of operation of the aluminum IDC sensor, especially looking for evidence of an aluminum–water electrochemical interaction.…”

Section: Introductionmentioning

confidence: 99%

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Full-Self-Powered Humidity Sensor Based on Electrochemical Aluminum–Water Reaction

Bošković

Šljukić

Radović

et al. 2021

Sensors

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A detailed examination of the principle of operation behind the functioning of the full-self-powered humidity sensor is presented. The sensor has been realized as a structure consisting of an interdigitated capacitor with aluminum thin-film digits. In this work, the details of its fabrication and activation are described in detail. The performed XRD, FTIR, SEM, AFM, and EIS analyses, as well as noise measurements, revealed that the dominant process of electricity generation is the electrochemical reaction between the sensor’s aluminum electrodes and the water from humid air in the presence of oxygen, which was the main goal of this work. The response of the sensor to human breath is also presented as a demonstration of its possible practical application.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Full-Self-Powered Humidity Sensor Based on Electrochemical Aluminum–Water Reaction

Bošković

Šljukić

Radović

et al. 2021

Sensors

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“…Other researchers created self-contained artificial respiratory sensors based on the hydroelectric effect of graphene oxide [57][58][59][60][61]. Bo-skovic et al introduced a humidity sensor based on an aluminum breathing monitor; no external power supply is required because of the low volume [62]. Using 1% silicone thin foam film as a composite capacitor, the air humidity sensor has the same functionality as an aluminum air battery.…”

Section: Respiratory Temperature/ Humidity Monitoringmentioning

confidence: 99%

Emerging Development of Auto-Charging Sensors for Respiration Monitoring

Owida

Al-Ayyad

Al-Nabulsi

2022

International Journal of Biomaterials

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In recent years, the development of biomedical monitoring systems, including respiration monitoring systems, has been accelerated. Wearable and implantable medical devices are becoming increasingly important in the diagnosis and management of disease and illness. Respiration can be monitored using a variety of biosensors and systems. Auto-charged sensors have a number of advantages, including low cost, ease of preparation, design flexibility, and a wide range of applications. It is possible to use the auto-charged sensors to directly convert mechanical energy from the airflow into electricity. The ability to monitor and diagnose one’s own health is a major goal of auto-charged sensors and systems. Respiratory disease model output signals have not been thoroughly investigated and clearly understood. As a result, figuring out their exact interrelationship is a difficult and important research question. This review summarized recent developments in auto-charged respiratory sensors and systems in terms of their device principle, output property, detecting index, and so on. Researchers with an interest in auto-charged sensors can use the information presented here to better understand the difficulties and opportunities that lie ahead.

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“…In the field of self-powered humidity sensors, one approach is to generate electricity directly from moisture and use it as a humidity detector [21][22][23][24][25][26][27][28][29], even though this approach can only provide the ability to detect the difference between very high and very low humidity levels. Other examples are based on TiO 2 nanowire networks [15,30] and the aluminum-air battery principle [31,32]. Aluminum-air batteries represent a specific example of the much wider class of the so-called "metal-gas" batteries [33].…”

Section: Introductionmentioning

confidence: 99%

Self-Powered Wearable Breath-Monitoring Sensor Enabled by Electromagnetic Harvesting Based on Nano-Structured Electrochemically Active Aluminum

et al. 2023

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Self-powered sensors are gaining a lot of attention in recent years due to their possible application in the Internet of Things, medical implants and wireless and wearable devices. Human breath detection has applications in diagnostics, medical therapy and metabolism monitoring. One possible approach for breath monitoring is detecting the humidity in exhaled air. Here, we present an extremely sensitive, self-powered sensor for breath humidity monitoring. As a power source, the sensor uses electromagnetic energy harvested from the environment. Even electromagnetic energy harvested from the human body is enough for the operation of this sensor. The signal obtained using the human body as a source was up to 100 mV with an estimated power of 1 nW. The relatively low amount of energy that could be harvested in this way was producing a signal that was modulated by an interdigitated capacitor made out of electrochemically activated aluminum. The signal obtained in this way was rectified by a set of Schottky diodes and measured by a voltmeter. The sensor was capable of following a variety of different respiration patterns during normal breathing, exercise and rest, at the same time powered only by electromagnetic energy harvested from the human body. Everything happened in the normal environment used for everyday work and life, without any additional sources, and at a safe level of electromagnetic radiation.

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Aluminum-based self-powered hyper-fast miniaturized sensor for breath humidity detection

Cited by 16 publications

References 47 publications

Full-Self-Powered Humidity Sensor Based on Electrochemical Aluminum–Water Reaction

Full-Self-Powered Humidity Sensor Based on Electrochemical Aluminum–Water Reaction

Emerging Development of Auto-Charging Sensors for Respiration Monitoring

Self-Powered Wearable Breath-Monitoring Sensor Enabled by Electromagnetic Harvesting Based on Nano-Structured Electrochemically Active Aluminum

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