Hydration and Viscoelastic Properties of High- and Low-Density Polymer Brushes Using a Quartz-Crystal Microbalance Based on Admittance Analysis (QCM-A)

Furusawa, Hiroyuki; Sekine, Tomomi; Ozeki, Toshinaga

doi:10.1021/acs.macromol.6b00035

Cited by 28 publications

(31 citation statements)

References 44 publications

(93 reference statements)

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“…This technique is traditionally based on expensive and bulky lab-based impedance analyzers, where it has been applied in different applications [ 69 , 70 , 71 ], including the use of QCM resonators as humidity sensors [ 31 , 32 , 33 ]. On the other hand, various attempts have been made by researchers to maintain conventional analyzers advantages while developing compact systems.…”

Section: Qcm Electronic Interfacing Systems For Sensing Applicatiomentioning

confidence: 99%

Quartz Crystal Microbalance Electronic Interfacing Systems: A Review

Alassi

Benammar

Brett

2017

Sensors

150

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Quartz Crystal Microbalance (QCM) sensors are actively being implemented in various fields due to their compatibility with different operating conditions in gaseous/liquid mediums for a wide range of measurements. This trend has been matched by the parallel advancement in tailored electronic interfacing systems for QCM sensors. That is, selecting the appropriate electronic circuit is vital for accurate sensor measurements. Many techniques were developed over time to cover the expanding measurement requirements (e.g., accommodating highly-damping environments). This paper presents a comprehensive review of the various existing QCM electronic interfacing systems. Namely, impedance-based analysis, oscillators (conventional and lock-in based techniques), exponential decay methods and the emerging phase-mass based characterization. The aforementioned methods are discussed in detail and qualitatively compared in terms of their performance for various applications. In addition, some theoretical improvements and recommendations are introduced for adequate systems implementation. Finally, specific design considerations of high-temperature microbalance systems (e.g., GaPO 4 crystals (GCM) and Langasite crystals (LCM)) are introduced, while assessing their overall system performance, stability and quality compared to conventional low-temperature applications.

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Section: Qcm Electronic Interfacing Systems For Sensing Applicatiomentioning

confidence: 99%

Quartz Crystal Microbalance Electronic Interfacing Systems: A Review

Alassi

Benammar

Brett

2017

Sensors

150

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“…The sensor cell, with a volume of 500 μL, was equipped with an AT-cut quartz plate with a diameter of 8.7 mm, which had a gold electrode of 5.7 mm 2 in area attached at the bottom of the cell [27][28][29]. CD films were prepared on the gold electrode ( Figure 2).…”

Section: Preparation Of α- β- and γ-Cd Films On Qcm Sensor Surfacesmentioning

confidence: 99%

“…The mass change (∆m) can be calculated from the frequency change (∆F) using Equation (1). Specific details are described in previous papers [27][28][29].…”

Section: Qcm Setup and Odorant Molecule Detectionmentioning

confidence: 99%

“…In this study, we demonstrated the capture capability of CDs for ethyl butyrate and limonene, which were selected as model odorant molecules for fruit fragrances, using a highly sensitive 27-MHz QCM device [27][28][29] (Figure 1). CD thin films prepared with α-, β-, or γ-CD were expected to possess molecular-size selectivity, resulting in pattern recognition.…”

Section: Introductionmentioning

confidence: 99%

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Detection of Odorant Molecules in the Gaseous Phase Using α-, β-, and γ-Cyclodextrin Films on a Quartz Crystal Microbalance

et al. 2018

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Abstract:There is an interest in sensors for the detection of odorant molecules in the gaseous phase, especially those related to the fragrance of fruits, because odorant sensing is useful for on-site quality control of agricultural products. Previously, gas-chromatographic methods requiring bench-top devices were used for odorant-molecule detection. Herein, we report an odorant sensor based on cyclodextrins (CDs) as a stable odorant receptor, using a highly mass-sensitive and quantitative 27-MHz quartz crystal microbalance (QCM) device, which has the advantage of possible incorporation into portable devices. When ethyl butyrate (a model odorant molecule for fruit fragrances) was flowed onto a QCM plate modified with α-, β-, or γ-CD network films, a decrease in frequency was observed (corresponding to an increase in mass), owing to the capture of odorant molecules by CD molecules. The CD films were capable of capturing and releasing odorant molecules, depending on the type of CD (α-, β-, or γ-CD). Thus, these sensors are reusable for odorant-molecule sensing, and are applicable to pattern recognition of odorant molecules. Thus, sensors based on CD films combined with a QCM handheld device could be applied to monitoring the condition of fruits.

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“…More specifically, polymers are becoming key for developing such composite materials due to their low cost, ease of synthesis and interesting properties such as viscoelasticity or versatility in composition. 13,14 In fact, thanks to the many available monomers, the choice of possible polymers is vast, and the same applies for the resulting nanocomposites. Additionally, the use of polymer can simplify the ability to pattern metallic nanoparticles by an in-situ cation reduction approach.…”

Section: Introductionmentioning

confidence: 99%

Incorporation and distribution of noble metal atoms in polyacrylonitrile colloidal particles using different polymerization strategies

Beltzung

Colombo

Nachtegaal

et al. 2018

Polymer

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This work is focused on the incorporation of inorganic compounds into an organic framework. More precisely, noble metals are being incorporated in-situ in polyacrylonitrile colloidal particles (CPs) using, scalable and reproducible synthesis routes. For this purpose, oil-soluble platinum-and palladium-based precursors are used for physical entrapment based on mini-emulsion polymerization, while water soluble precursors of the same metals are used for the incorporation via chemical entrapment based on conventional emulsion polymerization. For the latter, it is shown that one can well alter the spatial distribution of the metal within the CPs by tuning the feeding strategy of the precursor. In addition, chemical entrapment requires the complexation of the metal with acrylonitrile, thus resulting in the incorporation of single atoms and dimers, as suggested by both X-ray absorption spectroscopy and indirectly by NMR-titration. The visualization of the extent of incorporation was performed by STEM-EDX on all synthesized CPs, while ICP-OES was applied for a quantitative evaluation. Finally, to prove the absence of large metal aggregates in the samples, high-resolution STEM was applied.

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Hydration and Viscoelastic Properties of High- and Low-Density Polymer Brushes Using a Quartz-Crystal Microbalance Based on Admittance Analysis (QCM-A)

Cited by 28 publications

References 44 publications

Quartz Crystal Microbalance Electronic Interfacing Systems: A Review

Quartz Crystal Microbalance Electronic Interfacing Systems: A Review

Detection of Odorant Molecules in the Gaseous Phase Using α-, β-, and γ-Cyclodextrin Films on a Quartz Crystal Microbalance

Incorporation and distribution of noble metal atoms in polyacrylonitrile colloidal particles using different polymerization strategies

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