Optimizing Piezoelectric Cantilever Design for Electronic Nose Applications

Korsa, Matiyas Tsegay; Domingo, Josep Maria Carmona; Nsubuga, Lawrence; Hvam, Jeanette; Niekiel, Florian; Lofink, Fabian; Rubahn, Horst‐Günter; Adam, Jost; Hansen, Roana Melina de Oliveira

doi:10.3390/chemosensors8040114

Cited by 10 publications

(6 citation statements)

References 25 publications

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“…A layer of piezoelectric Aluminum Nitride (AlN) is sputtered on the cantilevers and contacted by electrodes deposited via electron beam evaporation. The cantilever is wire-bonded on a printed circuit board and interfaced with an impedance analyzer electronic circuit on a hand-held device designed for cadaverine detection and meat freshness evaluation, as described in [ 4 ].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the flexibility of adapting the functionalized layer to the target gas, there are unending possibilities for application of these sensors into a wide range of fields. We have previously studied its application for cadaverine (meat freshness biomarker) sensing and demonstrated the application of micro-cantilever sensors for this use [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Surface Modification Enabling Reproducible Cantilever Functionalization for Industrial Gas Sensors

Mamou

Nsubuga

Marcondes

et al. 2021

Sensors

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Micro-cantilever sensors are a known reliable tool for gas sensing in industrial applications. We have demonstrated the application of cantilever sensors on the detection of a meat freshness volatile biomarker (cadaverine), for determination of meat and fish precise expiration dates. For achieving correct target selectivity, the cantilevers need to be functionalized with a cadaverine-selective binder, based on a cyclam-derivative. Cantilever surface properties such as surface energy strongly influence the binder morphology and material clustering and, therefore, target binding. In this paper, we explore how chemical and physical surface treatments influence cantilever surface, binder morphology/clustering and binding capabilities. Sensor measurements with non-controlled surface properties are presented, followed by investigations on the binder morphology versus surface energy and cadaverine capture. We demonstrated a method for hindering binder crystallization on functionalized surfaces, leading to reproducible target capture. The results show that cantilever surface treatment is a promising method for achieving a high degree of functionalization reproducibility for industrial cantilever sensors, by controlling binder morphology and uniformity.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface Modification Enabling Reproducible Cantilever Functionalization for Industrial Gas Sensors

Mamou

Nsubuga

Marcondes

et al. 2021

Sensors

Self Cite

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show abstract

“…Another sensitive technique for gas sensing with perspectives for miniaturization and portable gas sensing solutions consists of piezoelectric resonators, including cantilevers, membranes and quartz crystals. Demonstrations of portable gas sensing solutions for selected targets have been demonstrated [16][17][18][19][20][21][22][23][24], and selectivity can be achieved by applying a selective binder to the surface of the piezoelectric resonator. When the target molecules bind to the sensor surface, changes in mass can be measured as changes in the resonance frequency/impedance of the sensor.…”

Section: Gas Sensing Techniquesmentioning

confidence: 99%

Breath Biomarkers as Disease Indicators: Sensing Techniques Approach for Detecting Breath Gas and COVID-19

et al. 2022

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Extensive research shows that there is a close correlation between a disease diagnostic and the patient’s exhale breath gas composition. It has been demonstrated, for example, that patients with a diabetes diagnosis have a certain level of acetone fume in their exhale breath. Actually, symptoms from many other diseases could be easily diagnosed if appropriate and reliable gas sensing technologies are available. The COVID-19 pandemic has created demand for a cheap and quick screening tool for the disease, where breath biomarker screening could be a very promising approach. It has been shown that COVID-19 patients potentially present a simultaneous increase in ethanal (acetaldehyde) and acetone in their exhale breath. In this paper, we explore two different sensing approaches to detect ethanal/acetone, namely by colorimetric markers, which could for example be integrated into facemasks, and by a breathalyzer containing a functionalized quartz crystal microbalance. Both approaches can successfully detect the presence of a biomarker gas on a person’s breath and this could potentially revolutionize the future of healthcare in terms of non-invasive and early-stage detection of various diseases.

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“…Other types of gravimetric sensor systems based on film bulk acoustic resonator [94][95][96], cantilevers [97][98][99][100][101], capacitive micro-machined ultrasonic transducer [102,103] have also been explored and optimized for the detection of VOCs. The following reviews [34,42,43,104] provide more details about these sensors and bring together different research articles that focus on the development of this technique.…”

Section: Gravimetric or Piezoelectric Sensorsmentioning

confidence: 99%

An Overview of Artificial Olfaction Systems with a Focus on Surface Plasmon Resonance for the Analysis of Volatile Organic Compounds

et al. 2021

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The last three decades have witnessed an increasing demand for novel analytical tools for the analysis of gases including odorants and volatile organic compounds (VOCs) in various domains. Traditional techniques such as gas chromatography coupled with mass spectrometry, although very efficient, present several drawbacks. Such a context has incited the research and industrial communities to work on the development of alternative technologies such as artificial olfaction systems, including gas sensors, olfactory biosensors and electronic noses (eNs). A wide variety of these systems have been designed using chemiresistive, electrochemical, acoustic or optical transducers. Among optical transduction systems, surface plasmon resonance (SPR) has been extensively studied thanks to its attractive features (high sensitivity, label free, real-time measurements). In this paper, we present an overview of the advances in the development of artificial olfaction systems with a focus on their development based on propagating SPR with different coupling configurations, including prism coupler, wave guide, and grating.

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Optimizing Piezoelectric Cantilever Design for Electronic Nose Applications

Cited by 10 publications

References 25 publications

Surface Modification Enabling Reproducible Cantilever Functionalization for Industrial Gas Sensors

Surface Modification Enabling Reproducible Cantilever Functionalization for Industrial Gas Sensors

Breath Biomarkers as Disease Indicators: Sensing Techniques Approach for Detecting Breath Gas and COVID-19

An Overview of Artificial Olfaction Systems with a Focus on Surface Plasmon Resonance for the Analysis of Volatile Organic Compounds

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