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Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.


(a) Schematic illustration of formaldehyde sensor comprising piezoresistive cantilever sensor platform. (b) Variation of output voltage and surface stress over time given increasing concentration of formaldehyde vapor [29].
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f7-sensors-13-04468: (a) Schematic illustration of formaldehyde sensor comprising piezoresistive cantilever sensor platform. (b) Variation of output voltage and surface stress over time given increasing concentration of formaldehyde vapor [29].

Mentions: Piezoresistivity is a common sensing principle for micromachined sensors. Among all known piezoresistive materials, doped silicon, in particular, exhibits remarkable piezoresistive response characteristics. An electrical resistor may change its resistance when it experiences a strain and deformation. This effect provides an easy and direct energy/signal transduction mechanism between the mechanical and the electrical domains [22]. Seo et al. [29] proposed a gaseous formaldehyde sensor comprising a cantilever coated with a 3-mercaptophenol self-assembled monolayer (SAM, see Figure 7(a)).


Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

(a) Schematic illustration of formaldehyde sensor comprising piezoresistive cantilever sensor platform. (b) Variation of output voltage and surface stress over time given increasing concentration of formaldehyde vapor [29].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673094&req=5

f7-sensors-13-04468: (a) Schematic illustration of formaldehyde sensor comprising piezoresistive cantilever sensor platform. (b) Variation of output voltage and surface stress over time given increasing concentration of formaldehyde vapor [29].
Mentions: Piezoresistivity is a common sensing principle for micromachined sensors. Among all known piezoresistive materials, doped silicon, in particular, exhibits remarkable piezoresistive response characteristics. An electrical resistor may change its resistance when it experiences a strain and deformation. This effect provides an easy and direct energy/signal transduction mechanism between the mechanical and the electrical domains [22]. Seo et al. [29] proposed a gaseous formaldehyde sensor comprising a cantilever coated with a 3-mercaptophenol self-assembled monolayer (SAM, see Figure 7(a)).

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.