Applications of Sol−Gel-Derived Membranes to Neutral Carrier-Type Ion-Sensitive Field-Effect Transistors

Kimura, Kazuhiro; Sunagawa, Takenobu; Yokoyama, Masaaki

doi:10.1021/ac9611069

Cited by 48 publications

(19 citation statements)

References 13 publications

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“…Other macrocyclic ligands such as crown ethers and bis(crown ether) derivatives encapsulated inside silica have been studied for the separation of strontium(II) 15 and as sensor and electrode materials. 16,17 In the present study, we have sought to incorporate calixcrowns covalently into solid-state mesoporous silica, with preservation of their binding characteristics and selectivity. We utilize the concept of surfactant-directed mesostructured oxide assembly to produce mesoporosity.…”

Section: Introductionmentioning

confidence: 99%

Novel mesoporous organosilicas containing size-selective micropores from covalently bound calixcrowns

Liu

Lambert

2004

J. Mater. Chem.

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Section: Introductionmentioning

confidence: 99%

Novel mesoporous organosilicas containing size-selective micropores from covalently bound calixcrowns

Liu

Lambert

2004

J. Mater. Chem.

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“…An obvious solution to the problem of non-biocompatibility caused by plasticiser is to eliminate the use of plasticiser altogether. This has been attempted with polymer matrix such as sol-gel (8) and also methacrylic-acrylic copolymers (9)(10)(11)(12)(13)(14) . In this work, we have synthesised a methacrylic-acrylic copolymer and employed it as a non-plasticised membrane for hydrogen ion-selective sensor application.…”

Section: Introductionmentioning

confidence: 99%

A Hydrogen Ion-Selective Sensor Based on Non-Plasticised Methacrylic-acrylic Membranes

Heng

Chern

Ahmad

2002

Sensors

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A methacrylic-acrylic polymer was synthesised for use as a non-plasticised membrane for hydrogen ion-selective sensor incorporating tridodecylamine as an ionophore. The copolymer consisted of methyl methacrylate and n-butyl acrylate monomers in a ratio of 2:8. Characterisation of the copolymer using FTNMR demonstrated that the amount of each monomer incorporated during solution polymerisation was found to be similar to the amount used in the feed before polymerisation. The glass transition temperature of the copolymer determined by differential scanning calorimetry was -30.9 ºC. Potentiometric measurements conducted showed a linear pH response range of 4.3 -9.6 with the response slope of 56.7 mV/decade. The selectivity of the sensors towards hydrogen ions was similar to other plasticiser based membrane electrodes and the logarithmic selectivity coefficients for discrimination against interference cations is close to -9.7. However, the incorporation of a lipophilic anion as membrane additive is essential in ensuring optimum performance of the hydrogen ion sensor.

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“…One of the potent applications of such materials is in the development of sensors particularly for attaching the sensing material to the surface of physico-chemical transducers. A number of publications are available in the literature on the application of sol-gel glass for the development of optical and electrochemical sensors since the sol-gel process involves a low temperature production of ceramic materials through the hydrolysis of its alkoxide precursor, followed by co-polymerization of the hydroxylated monomers [7].…”

Section: Introductionmentioning

confidence: 99%

Studies on Ferrocene Immobilized Sol-Gel Glasses and Its Application in the Construction of a Novel Solid-State Ion Sensor

et al. 1999

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Two new sol-gel glass systems with immobilized ferrocene are developed using two different types of sol-gel precursors. System (1) is developed using ferrocene carboxaldehyde and a mixture of two silanes (3-aminopropyltriethoxy silane and 2-(3,4-epoxycyclohexyl)-ethyltrimethoxy silane). System (2) is developed using ferrocene monocarboxylic acid and a mixture of 3-glycidoxypropyltrimethoxysilane and trimethoxysilane. The surfaces of the sol-gel glasses are analyzed based on scanning electron microscopy (SEM). The electrochemistry of ferrocene in system 1 and system 2 is characterized based on cyclic voltammetry. System 1 shows capacitive CV at slow scan rate whereas system 2 shows good reversible electrochemistry of ferrocene. The potentiometric response of the ferrocene immobilized sol-gel glass (system 1) is studied in 10 mM Tris-HCl buffer pH 7.0. A reproducible potential difference of system 1 to the order of À30 mV is recorded for 2 months with respect to a double junction SCE reference electrode. An ion sensing membrane is assembled over the ferrocene immobilized sol-gel glass using plasticized PVC matrix membrane containing dibenzo-18-crown-6. A typical potentiometric response of the ion sensor is reported. The response of the ion-sensor shows better response time, high reproducibility and relatively better slope for potassium analysis as compared to earlier reported solid-state K ion-sensor based on dibenzo-18-crown-6 neutral carrier. The reproducibility, detection limit and relative response of the ion sensor to Na and NH 4 ions are reported.

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Applications of Sol−Gel-Derived Membranes to Neutral Carrier-Type Ion-Sensitive Field-Effect Transistors

Cited by 48 publications

References 13 publications

Novel mesoporous organosilicas containing size-selective micropores from covalently bound calixcrowns

Novel mesoporous organosilicas containing size-selective micropores from covalently bound calixcrowns

A Hydrogen Ion-Selective Sensor Based on Non-Plasticised Methacrylic-acrylic Membranes

Studies on Ferrocene Immobilized Sol-Gel Glasses and Its Application in the Construction of a Novel Solid-State Ion Sensor

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