Humidity-sensing properties of ZnO QDs coated QCM: Optimization, modeling and kinetic investigations

Sakly, Nawfel; Saı̈d, Ayoub Haj; Ouada, H. Ben

doi:10.1016/j.mssp.2014.06.027

Cited by 40 publications

(19 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, it can be seen in the same figure that the frequency shifts as a function of the RH did not show a linear tendency with increasing RH regardless the sensitive layer. Similar behavior was previously observed for ZnO QDs, bacterial cellulose as well as fibrous composite polyacrylic acid (PAA)/poly(vinyl alcohol) (PVA) membranes coated QCM humidity sensors. Commonly, the deviation from linearity of the calibration curve was widely interpreted according to multi‐molecular adsorption models including BET adsorption theory .…”

Section: Resultssupporting

confidence: 81%

“…Nevertheless a slight decreasing in sensitivity following immobilization of Ag nanoparticles was detected. Overall, such performance remained larger than that obtained for pure ZnO QDs sensitive layer reported in our previous study and comparable to that estimated for organic coating …”

Section: Resultssupporting

confidence: 78%

“…Humidity sensing experiments were performed in a system using dynamic vapor sensing (DVS) method previously described in Ref . Before determining the different performances of each functionalized QCM, a blank test was performed.…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Ag‐nanocomposite based on carboxymethylcellulose for humidity detection: Green synthesis and sensing performances

Marzouk

Sakly

Roudesli

et al. 2016

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

A novel highly sensitive Ag-nanocomposite for humidity detection has been successfully prepared. Initially, cellulose isolated from Tunisian palm date petiole was converted to carboxymethyl cellulose (CMC) as biomatrix under heterogeneous conditions. The synthesized product was thoroughly characterized by means of FT-IR spectroscopy, viscosity analysis, and high performance size exclusion chromatography multiangle laser light scattering. CMC was used as reducing and stabilizing agent to prepare CMCstabilized silver nanoparticles via a rapid green method. The bioreduction of silver ions under different experimental conditions, including Ag 1 concentration and pH, was investigated. Optimal experimental conditions provided a long-term stable colloidal suspension and well-dispersed spherical shape Ag NPs with a size ranging from 13 to 28 nm. Ag-nanocomposite coated quartz microbalance crystal was used as sensitive layer for humidity detection. A comparative study showed that the immobilized metallic nanostructures greatly reduced changes in visco-elastic properties, increased surface area as well as surface local charge density of the CMC. Consequently, sensor performances were greatly enhanced: better stability even at higher relative humidity (RH), good reproducibility and linearity (11-98% RH), low hysteresis characteristics, and rapid response and recovery times (14 and 6 s, respectively) were obtained.

show abstract

Section: Resultssupporting

confidence: 81%

Section: Resultssupporting

confidence: 78%

See 1 more Smart Citation

Ag‐nanocomposite based on carboxymethylcellulose for humidity detection: Green synthesis and sensing performances

Marzouk

Sakly

Roudesli

et al. 2016

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…Fano-resonance based model fitting [6] results indicated that multi-layer ZnO-NRs-patterned piezoresistive micro-cantilevers sensor have a sensitivity value of 6.35 ± 0.27 ppm/RH% at 25 °C in the range from 30% RH to 80% RH (Figure 4). This sensitivity is higher than 0.05 ppm/RH% and 0.12 ppm/% reported for sol-gel ZnO nanowires and nanoparticles, respectively, on a quartz crystal balance [7] and ZnO quantum dots on a QCM with 5-10 ppm/% [8]. Besides, to improve the sensitivity, a new type 3D columnar cacti-like ZnO NRs @ Si NRs ( Figure 5) based on Atomic layer deposited seed layer has been fabricated on the microcantilever, which is supposed to have much larger surface-to-volume ratio, higher density of surface vacancies and more chemisorption active sites required for gas sensing.…”

Section: Resultsmentioning

confidence: 58%

Fabrication of ZnO Nanorods on MEMS Piezoresistive Silicon Microcantilevers for Environmental Monitoring

Bertke

Gad

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

View full text Add to dashboard Cite

Abstract:In this study, a ZnO nanorods (NRs) patterned MEMS piezoresistive silicon microcantilever was fabricated as environmental monitor. The fabrication starts from bulk silicon, utilizing photolithography, diffusion, inductively coupled plasma (ICP) cryogenic dry etching, Zinc DC-sputtering, and chemical bath deposition (CBD) etc. This sensor shows a humidity sensitivity value of 6.35 ± 0.27 ppm/RH% at 25 °C in the range from 30% RH to 80% RH.

show abstract

“…Therefore, a considerable number of works have been focused on the development of organic-based sensors for the detection of benzene and acetone vapors. In this respect, quartz crystal microbalance-based sensors suffer many advantages over chemoresistive and optical sensors such as high sensitivity, short response and recovery times, portability, and simple instrumentation [7,8]. Responses of the quartz crystal microbalance (QCM) sensors vary in direct proportion to the extent of vapor sorption, which is typically rapid, reversible, and a linear function of vapor concentration [9].…”

Section: Introductionmentioning

confidence: 99%

A quartz crystal microbalance study of the adsorption of benzene and acetone vapors onto coumarin-substituted manganese phthalocyanine film

Ömür¹,

Altındal²

2017

Turk J Phys

View full text Add to dashboard Cite

Abstract:A novel coumarin-substituted manganese phthalocyanine (5) was successfully synthesized and used as sensing element for benzene and acetone vapor detection. The effects of water vapor on the benzene and acetone vapor-sensing properties and adsorption isotherms on thin film of 5 were also studied. Our preliminary results indicated that the presence of humidity modifies the baseline frequency but not the sensitivity of the sensor toward benzene and acetone vapors. Two isotherm models, Langmuir and Jovanovic isotherms, were selected to describe the adsorption process.Linear regression analysis, which is the most basic and commonly used predictive analysis method, was used to estimate the suitability of the selected isotherm models. The Jovanovic model was found to be adequate for describing benzene and acetone adsorption onto compound 5.

show abstract

Humidity-sensing properties of ZnO QDs coated QCM: Optimization, modeling and kinetic investigations

Cited by 40 publications

References 36 publications

Ag‐nanocomposite based on carboxymethylcellulose for humidity detection: Green synthesis and sensing performances

Ag‐nanocomposite based on carboxymethylcellulose for humidity detection: Green synthesis and sensing performances

Fabrication of ZnO Nanorods on MEMS Piezoresistive Silicon Microcantilevers for Environmental Monitoring

A quartz crystal microbalance study of the adsorption of benzene and acetone vapors onto coumarin-substituted manganese phthalocyanine film

Contact Info

Product

Resources

About