Detection of formaldehyde vapor using conductive polymer films

Antwi-Boampong, Sadik; BelBruno, Joseph J.

doi:10.1016/j.snb.2013.03.008

Cited by 47 publications

(22 citation statements)

References 32 publications

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“…The result from Khan et al [102] demonstrated PPy/zirconium selenoiodate nanocomposite good reversible response toward formaldehyde vapors ranging from 5 to 7%. Antwi-Boampong and BelBruno [103] found that the PANi/PEI had significant increases in the resistance by greater than 10 k at a concentration of 38 ppm formaldehyde exposed for 1 min. However, the sensing sensitivity, selectivity, range of response and detection limits of these conducting polymers were not clear compared with PEI.…”

Section: Conducting Polymersmentioning

confidence: 98%

Thin-Film Sensors for Detection of Formaldehyde: A Review

Chen

Yuan

2015

IEEE Sensors J.

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This paper reviewed the films used in formaldehyde gas sensing recently. They can be divided into three groups: 1) metal oxide semiconductor films; 2) polymer films; and 3) carbon nanotubes (CNTs) films. Detection limits of these three groups were 1 ppb, 1 ppm, and 20 ppb, respectively. In metal-oxide-semiconductor films, the sensitivity of ZnO conductimetric type sensor was down to 1 ppb with the detectable response of 7.4. Polyethyleneimine/TiO 2 was the most sensitive film with quartz crystal microbalance sensor in polymer films, which could detect 1-ppm formaldehyde with the response ( f ) of 0.8 Hz. Either multi-wall CNTs (MWCNTs) or single-walled CNTs, forming a CNTs film, had the higher sensitivity so far, and the MWCNTs-NH 2 interdigital electrodes sensor exhibited 1.73% relative resistance change to 20 ppb of formaldehyde. The further research will be, however, needed to deal with the situation of real scenario influences, such as temperature, humidity, and interferents.

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Section: Conducting Polymersmentioning

confidence: 98%

Thin-Film Sensors for Detection of Formaldehyde: A Review

Chen

Yuan

2015

IEEE Sensors J.

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“…Many sensing materials have been investigated for formaldehyde due to its role in poor indoor air quality . It should be noted, however, that many papers that describe sensing materials for formaldehyde use formalin (liquid formaldehyde) as their formaldehyde source . The problem is that formalin is 37% formaldehyde and 10–15% of stabilizer, typically methanol, in water.…”

Section: Dominant Mechanisms For Different Volatile Organic Compoundsmentioning

confidence: 99%

“…For example, Antwi‐Boampong and BelBruno combined PANI and poly(ethylene imine) (PEI; Fig. a) and doped it with formic acid to create a selective sensing material for formaldehyde . PANI, which is conductive, has increased resistance when an analyte sorbs onto it and thus was the responsive part of the sensing material.…”

Section: Dominant Mechanisms For Different Volatile Organic Compoundsmentioning

confidence: 99%

Designing polymeric sensing materials: what are we doing wrong?

Stewart

Penlidis

2016

Polymers for Advanced Techs

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Gas analytes, or volatile organic compounds, interact with polymeric sensing materials through various sensing mechanisms. The dominant sensing mechanisms are discussed for different types of volatile organic compounds, which are categorized by their functional groups. Based on these sensing mechanisms, a systematic approach is used to design and tailor polymeric sensing materials for specific analytes and applications. This approach also takes into consideration other constraints determined by the target application. We include practical prescriptions on how to efficiently and cost‐effectively design, tailor, and select potential polymeric sensing materials, as well as how to evaluate these sensing materials. Copyright © 2016 John Wiley & Sons, Ltd.

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“…The final product, the interdigitated microelectrode grid shown in Figure , comprises 40 µm fingers with 20 µm spacing. Not chosen arbitrarily, the finger dimensions and spacing used for the sensor fabrication are based on previous work performed in our research group (Antwi‐Boampong and BelBruno, ) that showed that such an IDE configuration eliminates production defects and optimizes sensor response.…”

Section: Methodsmentioning

confidence: 99%

A selective molecularly imprinted polymer-carbon nanotube sensor for cotinine sensing

et al. 2013

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Conductive composite films comprised of single-walled carbon nanotubes coated with molecularly imprinted poly-4-vinylphenol are produced and characterized using ultraviolet and infrared spectroscopies, confirming the successful molecular imprinting of the film with cotinine. The electrical resistance of the imprinted film changes significantly upon binding cotinine, by more than 30 kΩ, while the unimprinted film in comparison elicits little response. Additionally, once the cotinine template desorbs from the film, the resistance of the imprinted film returns to a value close to the pre-adsorption baseline. Scanning electron microscopy is used to study the morphology of the film compared with the unimprinted control, and gas chromatography quantitatively confirms that the imprinted film selectively detects cotinine while discriminating against the structurally similar alkaloid, nicotine.

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Detection of formaldehyde vapor using conductive polymer films

Cited by 47 publications

References 32 publications

Thin-Film Sensors for Detection of Formaldehyde: A Review

Thin-Film Sensors for Detection of Formaldehyde: A Review

Designing polymeric sensing materials: what are we doing wrong?

A selective molecularly imprinted polymer-carbon nanotube sensor for cotinine sensing

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