Low Power Resistive Oxygen Sensor Based on Sonochemical SrTi0.6Fe0.4O2.8 (STFO40)

Stratulat, Alisa; Serban, Bogdan-Catalin; Luca, Andrea De; Avramescu, Viorel; Cobianu, C.; Brezeanu, M.; Buiu, O.; Diamandescu, L.; Féder, M.; Ali, Syed Zeeshan; Udrea, F.

doi:10.3390/s150717495

Cited by 11 publications

(6 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our group has considered different approaches [36][37][38][39], and as a result of our investigations we found that ink-jet printing, drop coating and sputtering are the main techniques which satisfy the previously described constrains and are amenable to high volume production at relatively low cost.…”

Section: B Sensing and Nano Materials Integrationmentioning

confidence: 85%

CMOS technology platform for ubiquitous microsensors

Udrea

Luca

2017

2017 International Semiconductor Conference (CAS)

View full text Add to dashboard Cite

In this paper we review a range of microsensors based on a common CMOS platform technology. The technology features a CMOS core which includes high temperature tungsten metallization and a post-CMOS deep reactive ion etching step of the substrate to release membranes, where the sensing elements are embedded. In one single process we were able to accommodate a variety of sensors such as gas, humidity, pressure, flow, temperature and infra-red detectors and emitters. The benefits of this platform are: (i) ultra-low power consumption, (ii) small form factor, (iii) high reliability and yield (iv) possibility of on-chip electronics and last but not least (v) low unit price.

show abstract

Section: B Sensing and Nano Materials Integrationmentioning

confidence: 85%

CMOS technology platform for ubiquitous microsensors

Udrea

Luca

2017

2017 International Semiconductor Conference (CAS)

View full text Add to dashboard Cite

show abstract

“…Response time and energy consumption are also topics of research, where the most part of commercial solutions have response times of seconds, sometimes reaching a few minutes; the energy consumption of these devices can reach the order of 500 milliwatts (mW) or even higher, due to the necessity of the heater. As the miniaturization of the devices has shown better response times, of the order of seconds to milliseconds, and power consumption of 80 mW, as reported by the Stratulat et al [124], it has a good potential to be used integrated in an IoT solution. Although no commercial solutions were found employing nanomaterials or microelectromechanical systems (MEMS), this has shown to be a promising technology to future products, allowing the development of embedded systems to measure gas concentrations in diverse scenarios, with lower power consumption than the traditional MOS transducers [125].…”

Section: Metal Oxide Semiconductorsmentioning

confidence: 91%

IoT-Enabled Gas Sensors: Technologies, Applications, and Opportunities

Gomes

Rodrigues

Rabêlo

et al. 2019

JSAN

View full text Add to dashboard Cite

Ambient gas detection and measurement had become essential in diverse fields and applications, from preventing accidents, avoiding equipment malfunction, to air pollution warnings and granting the correct gas mixture to patients in hospitals. Gas leakage can reach large proportions, affecting entire neighborhoods or even cities, causing enormous environmental impacts. This paper elaborates on a deep review of the state of the art on gas-sensing technologies, analyzing the opportunities and main characteristics of the transducers, as well as towards their integration through the Internet of Things (IoT) paradigm. This should ease the information collecting and sharing processes, granting better experiences to users, and avoiding major losses and expenses. The most promising wireless-based solutions for ambient gas monitoring are analyzed and discussed, open research topics are identified, and lessons learned are shared to conclude the study.Technologies to sense gases and wireless communications support are elaborated in Sections 5 and 6, respectively. The most promising solutions in terms of sensing methods and IoT-enabled solutions are discussed in Section 7 and open research topics are identified. Lessons learned are shared at Section 8 and, finally, Section 9 concludes the study. Background on Environmental GasesSome gases are the key to ensure the functionality of systems and entire industries, as well as the presence of other gases being a problem in other fields, causing the loss of entire production lines, as in the food industry, or even cause the loss of lives and explosions. In this section, the most important gases in terms of pollution monitoring and control, health issues, and accident prevention are listed with their main characteristics.Oxygen (O 2 ) is the most important gas for life, and is crucial in numerous fields. Patients under anesthesia, or recovering from surgery and from certain diseases need controlled O 2 doses to keep them alive and fully recovered. The decrease of oxygen levels in enclosed spaces can be related with other gases leakage, which would lead people inside these spaces to asphyxiate, leading to an unconscious state, or even to death [29]. Numerous industrial processes rely on the correct concentration of this gas to achieve the best results, mainly chemical and combustion, which without the correct percentages will not grant the best performance of systems. Engine control systems depend on the correct mixture to achieve the expected performances, whether it is lower fuel consumption or power and speed [29][30][31][32].Carbon dioxide (CO 2 ) is a colorless, odorless gas, generated by the oxidation and combustion of hydrocarbon, as well as by living beings in the respiration process. It is a key gas for the greenhouse effect, and the increase of its levels, in the presence of other gases, is related with atmospheric pollution. It is also the key gas on the oxygen production by the photosynthesis process. The accumulation of this gas in enclosed spaces can be responsible to s...

show abstract

“…In another report, S. K. Hodak et al [21] have reported ethanol sensing of SrTiO 3 thin films with gas concentration in range of 100 ppme1000 ppm. The oxygen sensing property of SrFe x Ti 1-x O 3 has been proposed via sonochemical method [22]. However, in present investigation, the ethanol sensing of Fe doped SrTiO 3 has been studied for low concentrations (5e50 ppm).…”

Section: Introductionmentioning

confidence: 91%

Elucidating iron doping induced n- to p- characteristics of Strontium titanate based ethanol sensors

Sarin

Mishra

Gupta

et al. 2018

Current Applied Physics

View full text Add to dashboard Cite

A series of pure and iron doped strontium titanate, (SrFe x Ti 1-x O 3 ; x ¼ 0, 0.1 and 0.2) powders were synthesized, characterized and used to fabricate ethanol sensors for low concentration. X-Ray Diffraction (XRD) technique was used to confirm the single phase formation. Microstructural properties of the powders were investigated using scanning electron microscopy (SEM). Electrical conductivity of all the samples at room temperature (RT) was measured. Sensors were optimized for best responsiveness by varying the operating temperature from 350 C to 500 C.The sensor with doping x ¼ 0.2 exhibited best sensing response at 400 C for ethanol gas. The undoped sensor demonstrated a decrease in resistance on exposure to ethanol gas whereas Fe-doped sensors showed increase in resistance. The doping induced changeover from n to p behavior in the sensing response on doping has been investigated and corroborated with an observed shift in the Fermi level position by X-ray photoelectron spectroscopy (XPS). The disparity in gas sensing response clearly demonstrates inter-connection of multiple influencing factors such as electrical conductivity, morphology, porosity and change in chemical composition on doping. The sensors were exposed to ethanol, nitrogen dioxide, carbon monoxide, butane gases at concentration between 5 ppm and 50 ppm. The sensor exhibited much reduced relative response to all gases other than ethanol which can be utilized for wide range of applications.

show abstract

Low Power Resistive Oxygen Sensor Based on Sonochemical SrTi0.6Fe0.4O2.8 (STFO40)

Cited by 11 publications

References 25 publications

CMOS technology platform for ubiquitous microsensors

CMOS technology platform for ubiquitous microsensors

IoT-Enabled Gas Sensors: Technologies, Applications, and Opportunities

Elucidating iron doping induced n- to p- characteristics of Strontium titanate based ethanol sensors

Contact Info

Product

Resources

About