Development of a photopolymerisable membrane for calcium ion sensors

Artigas, José María Gatell; Beltran, A; Jiménez, C.; Bartrolı́, Jordi; Alonso, J.

doi:10.1016/s0003-2670(00)01146-6

Cited by 29 publications

(9 citation statements)

References 22 publications

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“…[17,18] Today, electronics is being explored to regulate and communicate with biological (bioelectronics) and electrochemical systems. [19,20] It is therefore advantageous, for systems that are being realized in organic materials, to have signal processing that utilizes the same kind of signal carriers that exist in biological and electronic systems. An EC transistor uses both ions and electrons as signal carriers and can be driven at low voltages.…”

mentioning

confidence: 99%

Electrochemical Logic Circuits

Nilsson

Robinson

Berggren³

et al. 2005

Advanced Materials

191

160

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acetylacetone (5.0 mmol) and Na 2 CO 3 (10.0 mmol) were mixed with 2-ethoxyethanol (15 mL) and the mixture was refluxed at 100 C under a nitrogen atmosphere for 12 h. After cooling to room temperature, 2-ethoxyethanol was removed by vacuum. The residue was dissolved in dichloromethane and the solid was filtered off. The solution was concentrated in vacuo and the residue was purified on a silica gel column using dichoromethane and hexanes as eluent to give the desired iridium complex [Ir(PEQ) 2 (acac)]. The product was then sublimated at 200±220 C and at 4 10 ±3 Pa prior to device fabrication. Similar procedures were also employed for the synthesis of other iridium complexes (MPEQ) 2 Ir(acac) and (PEIQ) 2 Ir(acac). The spectral data and yields of all iridium complexes are as follows.( In 1977 Heeger, Shirakawa, MacDiarmid, and co-workers [1] discovered that conjugated organic polymers could conduct electrical current. The discovery has blazed a trail for a number of remarkable discoveries and inventions since then. To date, an impressive collection of fundamental solid-state devices has been demonstrated using organic polymers as the ac-COMMUNICATIONS Adv. Mater.

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mentioning

confidence: 99%

Electrochemical Logic Circuits

Nilsson

Robinson

Berggren³

et al. 2005

Advanced Materials

191

160

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“…These polymers are compatible with the photolithographic fabrication techniques used for MEMS 7,20 9 Iron and copper (micronutrients)…”

Section: 9mentioning

confidence: 99%

Review of polymer-based sensors for agriculture-related applications

Palaparthy¹,

Baghini²,

Singh³

2013

Emerging Materials Research

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Advancements in micro-electro-mechanical system (MEMS) and nano-electro-mechanical system (NEMS) technologies IntroductionIn agriculture, soil plays an important role in the overall yield of crop production. Although it is expected to enhance the yield by applying fertilizers, lack or excess levels of soil nutrients should be monitored. In general, for optimal control of soil conditions, it is necessary to measure nutrient content, moisture and pH levels, air humidity, temperature and composition of the soil at regular intervals. It is important to test the soil parameters to determine fertility, expected growth potential of the soil and measure nutrient deficiencies. 'pH' level is a measure of the acidity or basicity of the soil. Soil temperature influences crop growth since seeds, plant roots and microorganisms within the soil will not survive below some threshold temperature. Knowledge of soil humidity is important because it affects water-related reactions in the plants such as photosynthesis, pollination and even occurrence of plant diseases.1 Soil monitoring will also be useful for providing the basis for productions from soil such as food as well as controlling and regulating environmental interactions and sustaining biodiversity. Advancements in micro-electro-mechanical systems (MEMS) and nano-electro-mechanical systems (NEMS) as well as development of various chemical compounds has led to various methods and techniques for health monitoring and study of the soil. MEMS structures may be simple with no moving parts or be extremely complex with multiple moving elements under the control of integrated circuits. NEMS are next-generation MEMS devices, which are mainly in the nanometer scale. As a result, they are of low mass, high mechanical resonance frequencies, potentially large quantum mechanical effects such as zero-point motion, and a high surface-to-volume ratio that is useful for surface-based sensing mechanism.3 Figure 1 shows the structure of two commonly used MEMS structures: MEMS SU-8 polymer cantilever and MEMS microheater having suspended serpentine silicon beam as filament. 4,5 In this article, the authors present a review on reported polymers that are used for sensing various nutrients (which are also found in the soil) such as soil moisture, pH value and humidity. A polymer is

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“…Several other references include discussion of both ISE and ISFET sensor types with relevance to plant growth systems [42,44,141,156,157]. Compared to ISEs, ISFETs allow for further miniaturization, reduced response times and reduced susceptibility to external electromagnetic fields [154].…”

Section: Ion-selective Sensor Technologies For Terrestrial and Space-mentioning

confidence: 99%

Ion-Specific Nutrient Management in Closed Systems: The Necessity for Ion-Selective Sensors in Terrestrial and Space-Based Agriculture and Water Management Systems

Bamsey

Graham

Thompson

et al. 2012

Sensors

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The ability to monitor and control plant nutrient ions in fertigation solutions, on an ion-specific basis, is critical to the future of controlled environment agriculture crop production, be it in traditional terrestrial settings (e.g., greenhouse crop production) or as a component of bioregenerative life support systems for long duration space exploration. Several technologies are currently available that can provide the required measurement of ion-specific activities in solution. The greenhouse sector has invested in research examining the potential of a number of these technologies to meet the industry's demanding requirements, and although no ideal solution yet exists for on-line measurement, growers do utilize technologies such as high-performance liquid chromatography to provide off-line measurements. An analogous situation exists on the International Space Station where, technological solutions are sought, but currently on-orbit water quality monitoring is considerably restricted. This paper examines the specific advantages that on-line ion-selective sensors could provide to plant production systems both terrestrially and when utilized in space-based biological life support systems and how similar technologies could be applied to nominal on-orbit water quality monitoring. A historical development and technical review of the various ion-selective monitoring technologies is provided.

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Development of a photopolymerisable membrane for calcium ion sensors

Cited by 29 publications

References 22 publications

Electrochemical Logic Circuits

Electrochemical Logic Circuits

Review of polymer-based sensors for agriculture-related applications

Ion-Specific Nutrient Management in Closed Systems: The Necessity for Ion-Selective Sensors in Terrestrial and Space-Based Agriculture and Water Management Systems

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