Preparation of Langmuir–Blodgett thin films of calix[6]arenes and p-tert butyl group effect on their gas sensing properties

Özmen, Mustafa; Özbek, Zikriye; Bayrakcı, Mevlüt; Ertul, Şeref; Ersöz, Mustafa; Çapan, Rıfat

doi:10.1016/j.apsusc.2015.10.141

Cited by 18 publications

(5 citation statements)

References 27 publications

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“…These include porphyrins, phthalocyanines and insulating/conducting polymers [150, 151]. LB films of p-tert-butyl calyx (6) arene and calyx (6) arene showed organic vapour sensing properties [152]. LB films consisting of Fe 3 O 4 /γ-Fe 2 O 3 nanoparticles have been used as the active layer in designing solid state resistive chemical sensor for selective sensing of NO 2 and CO [153].…”

Section: Main Textmentioning

confidence: 99%

Unique supramolecular assembly through Langmuir – Blodgett (LB) technique

Hussain

Dey

Bhattacharjee

et al. 2018

Heliyon

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The Langmuir-Blodgett (LB) technique is a way of making supra-molecular assembly in ultrathin films with a controlled layered structure and crystal parameter, which have many envisioned technological applications for optical and molecular electronic devices as well as signal processing and transformation. Probably LB technique is the best method to manipulate materials at molecular level and provides a scope to realize the molecular electronics in reality. In this review article, we have discussed about the general introduction of LB technique and recent development on LB and related system including (i) LB methodology, (ii) characterizations of LB films, (iii) LB films and molecular electronics, (iv) historical review of LB films, (v) research and applications including fundamental research and application towards devices.

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Section: Main Textmentioning

confidence: 99%

Unique supramolecular assembly through Langmuir – Blodgett (LB) technique

Hussain

Dey

Bhattacharjee

et al. 2018

Heliyon

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“…By measuring the frequency shift due to the adsorption of the given vapor molecules, the amount of the adsorbed vapor molecules can be quantified via the Sauerbrey equation . Sauerbrey first discovered this measurement technique and described the resonance frequency change (Δ f ) against a mass change per unit area (Δ m ): Δ f = − true( 2 f 0 2 ρ q 1 / 2 μ q 1 / 2 A true) Δ m where f 0 is the initial frequency of uncoated quartz crystal (3.5 MHz), A is the piezo-electrically active area (1.13 cm 2 ), ρ q is the density of quartz (2.648 g cm –3 ), and μ q is the shear modulus of quartz (2.947 × 10 11 g cm –1 s –2 ).…”

Section: Methodsmentioning

confidence: 99%

“…By measuring the frequency shift due to the adsorption of the given vapor molecules, the amount of the adsorbed vapor molecules can be quantified via the Sauerbrey equation. 48 Sauerbrey first discovered this measurement technique and described the resonance frequency change (Δf) against a mass change per unit area (Δm): 49 i k j j j j j j j y…”

Section: Qcm Measurement Systemmentioning

confidence: 99%

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Capan,

Bayrakci

2024

ACS Appl. Polym. Mater.

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This study is the first report on the fabrication of polyacrylonitrile (PAN) nanofiber with rhodamine-based chemosensor (RHE) onto a mass-sensitive quartz crystal substrate using the electrospinning method and its sensing capability toward chlorinated hydrocarbons. Fabricated nanofiber webs via the electrospinning process are characterized by Fourier Transform Infrared (FTIR-ATR), Scanning Electron Microscopy, and Contact Angle measurement techniques, respectively. In order to investigate the vapor sensor properties, a Quartz Crystal Microbalance (QCM) system is employed to collect the real-time experimental data when the nanofiber sensor PAN-RHE is exposed to chlorinated hydrocarbons. Pseudo first-order and Elovich models are applied to elucidate the adsorption behavior. The morphological characterization proved smooth surface morphology without bead formation for all fibers with uniformity in the fiber skeleton. The average diameters of neat PAN and PAN nanofibers with RHE are found to be 449 and 790 nm, respectively. The nanofiber sensor PAN-RHE exhibits excellent sensing characteristics, including a high sensitivity of 0.0276 Hz/ppm, response and recovery times of 2−3 and 5−7 s, respectively, high selectivity for chloroform compared to other vapors tested, a limit of detection (LOD) of about 119.56 ppm, and a limit of quantification (LOQ) of about 362.31 ppm with a good reproducibility. The Pseudo-first-order adsorption rate and the Elovich desorption constants are determined as a function of different concentrations. The results obtained suggest that the QCM-based nanofiber sensor PAN-RHE shows great potential for the design of highly sensitive and selective chloroform sensors.

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“…In recent years, these materials have also been widely used in VOCs chemical sensors for selectivity improvement owing to the specific interaction between “hosts and guests” 25 – 27 . A series of studies are mainly concerned with size and structure effect on interfacial molecular recognition, e.g., cavity size 28 , central metal atom 29 and functional groups 30 , 31 . In these cases, quartz crystal microbalance (QCM) has been proved to be a suitable sensing component since an acoustic wave device is capable of comparing the sensitivity or selectivity of different supramolecular coatings by recording the mass of adsorbed analytes.…”

Section: Introductionmentioning

confidence: 99%

Investigation of sorptive interactions between volatile organic compounds and supramolecules at dynamic oscillation using bulk acoustic wave resonator virtual sensor arrays

Wang,

Zhao,

Jin

et al. 2024

Microsyst Nanoeng

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Supramolecules are considered as promising materials for volatile organic compounds (VOCs) sensing applications. The proper understanding of the sorption process taking place in host-guest interactions is critical in improving the pattern recognition of supramolecules-based sensing arrays. Here, we report a novel approach to investigate the dynamic host-guest recognition process by employing a bulk acoustic wave (BAW) resonator capable of producing multiple oscillation amplitudes and simultaneously recording multiple responses to VOCs. Self-assembled monolayers (SAMs) of β-cyclodextrin (β-CD) were modified on four BAW sensors to demonstrate the gas-surface interactions regarding oscillation amplitude and SAM length. Based on the method, a virtual sensor array (VSA) type electronic nose (e-nose) can be realized by pattern recognition of multiple responses at different oscillation amplitudes of a single sensor. VOCs analysis was realized respectively by using principal component analysis (PCA) for individual VOC identification and linear discriminant analysis (LDA) for VOCs mixtures classification.

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Preparation of Langmuir–Blodgett thin films of calix[6]arenes and p-tert butyl group effect on their gas sensing properties

Cited by 18 publications

References 27 publications

Unique supramolecular assembly through Langmuir – Blodgett (LB) technique

Unique supramolecular assembly through Langmuir – Blodgett (LB) technique

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Investigation of sorptive interactions between volatile organic compounds and supramolecules at dynamic oscillation using bulk acoustic wave resonator virtual sensor arrays

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