Surface acoustic wave (SAW) sensor for volatile organic compounds (VOCs) detection with calix[4]arene functionalized Gold nanorods (AuNRs) and silver nanocubes (AgNCs)

Kus, Funda; Altınkök, Çağatay; Zayim, Esra Ozkan; Erdemir, Serkan; Taşaltın, Cihat; Gürol, İlke

doi:10.1016/j.snb.2020.129402

Cited by 34 publications

(23 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significant improvement in the LOD of the current sensors compared to the earlier NH 3 devices from Table 1 clearly demonstrates the advantages of the QSM technology for SAW based sensor systems. Further work is necessary to also test the method on other types of plasma polymer films and apply it to sensing other gases of interest, such as the highly toxic NO 2 , VOC, and BTX [8,32,33], etc. The authors plan such studies in the near future.…”

Section: Discussionmentioning

confidence: 99%

“…Plasma polymer (PP) films (PPFs) have established themselves as reliable solid and semisolid sensing layers in surface acoustic wave (SAW)-based mass sensitive elements in gas and liquid phase chemical and biological sensor systems [1,2]. Today, such sensors are found in a variety of applications, such as systems for environmental monitoring and protection [3,4], detection of highly toxic warfare gases [5], various electronic noses in the food and drug industry [6], biosensors for medical diagnostics [7], volatile organic compounds (VOC) [8], and ultrafine particle detection [9], etc. PPFs are highly sensitive and yield fast response times [10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

et al. 2021

View full text Add to dashboard Cite

Plasma polymer films (PPF), widely used as sensing layers in surface acoustic wave (SAW) based gas and liquid phase sensors, have a major drawback: high concentrations of the sensed analytes easily drive these films into saturation, where accurate measurements are no longer possible. This work suggests a solution to this problem by modifying the PPF with the sensed chemical compound to improve the overall sorption properties and sensor dynamic range. Thin polymer films were synthesized from hexamethyldisiloxane (HMDSO) and triethylsilane (TES) monomers in a plasma-enhanced chemical vapor deposition (PECVD) process using a RF plasma reactor. We used these Si-containing compounds because they are known for their excellent sensing properties. In this work, the layers were deposited onto the active surface of high-Q 438 MHz Rayleigh SAW two-port resonators, used as mass sensitive sensor elements. We call these devices quartz surface microbalances (QSM). In a second step, ammonia plasma modification was applied to the HMDSO and TES films, in order to achieve a higher sensitivity to NH3. The sensors were probed at different NH3 gas concentrations in a computer controlled gas probing setup. A comparison with unmodified films revealed a 74% to 85% improvement in both the sensitivity and sorption ability of the HMDSO sensing layers, and of about 8% for the TES films.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…A surface acoustic wave (SAW) transducer device was designed in 2021 by Kus et al using gold nanorods and silver nanocubes functionalized with thiol and modified with Calix[4]arene, which increases the sensor responses by six- to eight-fold, with a selectivity towards chloroform and toluene, respectively. Detection levels reached 80–100 ppm [ 119 ].…”

Section: Discussionmentioning

confidence: 99%

“…Gas sensors that respond to toluene have also been extensively studied. In addition to the mentioned works [ 118 , 119 ], toluene was detected in human exhaled air by porous films made of Au-loaded TiO 2 nanotubes [ 120 ], by Pd-SnO 2 -clustered nanoparticles [ 121 ], and by a synergetic p + n field effect transistor (FET) amplification circuit [ 122 ]. The latter system was more specific for xylene and also showed good selectivity for formaldehyde [ 122 ].…”

Section: Discussionmentioning

confidence: 99%

Human Biomonitoring of Environmental and Occupational Exposures by GC-MS and Gas Sensor Systems: A Systematic Review

Longo

Forleo

Giampetruzzi

et al. 2021

IJERPH

View full text Add to dashboard Cite

Environmental chemicals and contaminants coming from multiple external sources enter the human body, determining a potential risk for human health. Human biomonitoring (HBM), measuring the concentrations of biomarkers in human specimens, has become an emerging approach for assessing population-wide exposure to hazardous chemicals and health risk through large-scale studies in many countries. However, systematic mapping of HBM studies, including their characteristics, targeted hazardous pollutants, analytical techniques, and sample population (general population and occupationally exposed workers), has not been done so far. We conducted a systematic review of the literature related to airborne hazardous pollutants in biofluids to answer the following questions: Which main chemicals have been included in the literature, which bodily fluids have been used, and what are the main findings? Following PRISMA protocol, we summarized the publications published up to 4 February 2021 of studies based on two methods: gas-chromatography/mass spectrometry (GC/MS) and electronic noses (e-noses). We screened 2606 records and 117 publications were included in the analysis, the most based on GC/MS analysis. The selected HBM studies include measurements of biomarkers in different bodily fluids, such as blood, urine, breast milk, and human semen as well as exhaled air. The papers cover numerous airborne hazardous pollutants that we grouped in chemical classes; a lot of hazardous and noxious compounds, mainly persistent organic pollutants (POPs) and volatile organic compounds (VOCs), have been detected in biological fluids at alarming levels. The scenario that emerged from this survey demonstrates the importance of HBM in human exposure to hazardous pollutants and the need to use it as valid tool in health surveillance. This systematic review represents a starting point for researchers who focus on the world of pollutant biomonitoring in the human body and gives them important insights into how to improve the methods based on GC/MS. Moreover, it makes a first overview of the use of gas sensor array and e-noses in HBM studies.

show abstract

“…The frequency shift is mainly caused by the mass or acoustoelectric changes that take place at the level of the sensitive layer in the presence of gas molecules [10]. SAW sensors are used both for the detection of hydrogen and for the detection of volatile organic compounds, ammonia, hydrogen sulfide or other toxic or explosive gases [8,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pd/ZnO Morphology on Surface Acoustic Wave Sensor Response

et al. 2021

View full text Add to dashboard Cite

Laser deposition was used to obtain Pd/ZnO bilayers, which were used as sensing layers in surface acoustic wave (SAW) sensors. The effect of laser deposition parameters such as deposition pressure, laser energy per pulse, laser wavelength or pulse duration on the porosity of the Pd and ZnO films used in the sensors was studied. The effect of the morphology of the Pd and ZnO components on the sensor response to hydrogen was assessed. Deposition conditions producing more porous films lead to a larger sensor response. The morphology of the ZnO component of the bilayer is decisive and has an influence on the sensor properties in the same order of magnitude as the use of a bilayer instead of a single Pd or ZnO layer. The effect of the Pd film morphology is considerably smaller than that of ZnO, probably due to its smaller thickness. This has implications in other bilayer material combinations used in such sensors and for other types of analytes.

show abstract

Surface acoustic wave (SAW) sensor for volatile organic compounds (VOCs) detection with calix[4]arene functionalized Gold nanorods (AuNRs) and silver nanocubes (AgNCs)

Cited by 34 publications

References 55 publications

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

Sensitivity Enhancement in Plasma Polymer Films for Surface Acoustic Wave Based Sensor Applications

Human Biomonitoring of Environmental and Occupational Exposures by GC-MS and Gas Sensor Systems: A Systematic Review

Effect of Pd/ZnO Morphology on Surface Acoustic Wave Sensor Response

Contact Info

Product

Resources

About