Development of conductive molecularly imprinted polymers (cMIPs) for limonene to improve and interconnect QCM and chemiresistor sensing

Völkle, Julia; Kumpf, Katarina; Feldner, Adriana; Lieberzeit, Peter A.; Fruhmann, Philipp

doi:10.1016/j.snb.2021.131293

Cited by 19 publications

(19 citation statements)

References 22 publications

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“…These lines were measured by an optical profilometer (Nanovea PS50) and yielded values of 200–300 nm layer thickness for lines printed with 10% PEDOT:PSS and 300–400 nm for lines with P3HT (10 mg/ml, Figure 8). Although the interdigitated electrodes might prevent the printed solution from an equal distribution over the surface, we obtained similar values (~300 nm) for a comparable system in the past 45 . In addition to profilometer measurements, SEM and EDX characterization of the electrodes were carried out (Figure 8).…”

Section: Resultssupporting

confidence: 67%

P3HTandPEDOT:PSSprinted thin films on chemiresistors: An economic and versatile tool for ammonia and humidity monitoring applications

Kumpf

Trattner

Aspermair

et al. 2023

J of Applied Polymer Sci

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We hereby present the fabrication of simple and efficient humidity and ammonia sensors based on a chemiresistor design employing a differential measurement technique. Interdigitated electrodes are connected via PEDOT:PSS or P3HT polymers and a reproducible and scalable fabrication procedure is presented. This procedure utilizes pneumatic nozzle printing instead of drop or spin-based processes and includes an optimized encapsulation procedure and material for sealing the reference electrodes. The suitability of the NH 3 sensor for quantifying ammonia in a range of 2 to 100 ppm within a period of several months is furthermore presented. The developed humidity sensor is operational for several months in a humidity range between 10 and 60% RH. Once this range is exceeded, a sensor decay by irreversible saturation can be observed. Based on the low fabrication costs of the sensors ($0.5 $ when ordering 1000 pcs of the platform + printing work), they provide a very attractive tool for industrial humidity and ammonia sensing applications.

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Section: Resultssupporting

confidence: 67%

P3HTandPEDOT:PSSprinted thin films on chemiresistors: An economic and versatile tool for ammonia and humidity monitoring applications

Kumpf

Trattner

Aspermair

et al. 2023

J of Applied Polymer Sci

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“…Other researchers have similarly produced limonene selective MIPs using common reagents and ratios (1:4:20 template-monomer-crosslinker) [ 143 , 144 ]. More pertinent with regard to this review however is the analysis by Völkle et al, in their study of limonene imprinting with different template-solvent ratios [ 145 ]. Styrene and divinylbenzene monomers (300 μL and 700 μL, respectively) were dissolved in solutions of limonene and toluene (1300 μL), with the template being varied from 5% to 100% of the solution.…”

Section: Template Imprintingmentioning

confidence: 99%

“…The sensor response was found to increase with limonene concentration up to 25%, equivalent to approximately 2.0:2.6 molar ratio of limonene to styrene. The decline as the concentration is increased may be a result of limonene impeding polymerisation, and possibly being bound covalently to the polymer [ 145 ].…”

Section: Template Imprintingmentioning

confidence: 99%

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Template Imprinting Versus Porogen Imprinting of Small Molecules: A Review of Molecularly Imprinted Polymers in Gas Sensing

Cowen

Cheffena

2022

IJMS

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The selective sensing of gaseous target molecules is a challenge to analytical chemistry. Selectivity may be achieved in liquids by several different methods, but many of these are not suitable for gas-phase analysis. In this review, we will focus on molecular imprinting and its application in selective binding of volatile organic compounds and atmospheric pollutants in the gas phase. The vast majority of indexed publications describing molecularly imprinted polymers for gas sensors and vapour monitors have been analysed and categorised. Specific attention was then given to sensitivity, selectivity, and the challenges of imprinting these small volatile compounds. A distinction was made between porogen (solvent) imprinting and template imprinting for the discussion of different synthetic techniques, and the suitability of each to different applications. We conclude that porogen imprinting, synthesis in an excess of template, has great potential in gas capture technology and possibly in tandem with more typical template imprinting, but that the latter generally remains preferable for selective and sensitive detection of gaseous molecules. More generally, it is concluded that gas-phase applications of MIPs are an established science, capable of great selectivity and parts-per-trillion sensitivity. Improvements in the fields are likely to emerge by deviating from standards developed for MIP in liquids, but original methodologies generating exceptional results are already present in the literature.

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“…The hybrid MIP produces a strong signal enhancement during the QCM measurements, allowing for the detection of limonene gas concentrations as low as 50 ppm. [ 124 ] MIP can improve the selectivity of localized SPR sensors toward VOCs such as α ‐pinene, volatile organic acids, and terpenes. For example, a novel localized SPR sensor array based on gold NPs and MISGs (MISG‐localized SPR) has been proposed for the effective recognition of volatile organic acids.…”

Section: Biorecognition Element Design and Selectionmentioning

confidence: 99%

Artificial Olfactory Biohybrid System: An Evolving Sense of Smell

Qin

Wang

et al. 2022

Advanced Science

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The olfactory system can detect and recognize tens of thousands of volatile organic compounds (VOCs) at low concentrations in complex environments. Bioelectronic nose (B-EN), which mimics olfactory systems, is becoming an emerging sensing technology for identifying VOCs with sensitivity and specificity. B-ENs integrate electronic sensors with bioreceptors and pattern recognition technologies to enable medical diagnosis, public security, environmental monitoring, and food safety. However, there is currently no commercially available B-EN on the market. Apart from the high selectivity and sensitivity necessary for volatile organic compound analysis, commercial B-ENs must overcome issues impacting sensor operation and other problems associated with odor localization. The emergence of nanotechnology has provided a novel research concept for addressing these problems. In this work, the structure and operational mechanisms of biomimetic olfactory systems are discussed, with an emphasis on the development and immobilization of materials. Various biosensor applications and current developments are reviewed. Challenges and opportunities for fulfilling the potential of artificial olfactory biohybrid systems in fundamental and practical research are investigated in greater depth.

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Development of conductive molecularly imprinted polymers (cMIPs) for limonene to improve and interconnect QCM and chemiresistor sensing

Cited by 19 publications

References 22 publications

P3HTandPEDOT:PSSprinted thin films on chemiresistors: An economic and versatile tool for ammonia and humidity monitoring applications

P3HTandPEDOT:PSSprinted thin films on chemiresistors: An economic and versatile tool for ammonia and humidity monitoring applications

Template Imprinting Versus Porogen Imprinting of Small Molecules: A Review of Molecularly Imprinted Polymers in Gas Sensing

Artificial Olfactory Biohybrid System: An Evolving Sense of Smell

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