Some studies on gas-sensing organic semiconductors. by Timothy J. Raby

Cover of: Some studies on gas-sensing organic semiconductors. | Timothy J. Raby

Published by University of Birmingham in Birmingham .

Written in English

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Thesis(Ph.D.) - University of Birmingham, Dept of Chemistry.

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Open LibraryOL13825030M

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The second part of the book describes recent developments in silicon carbide- and graphene-based gas sensors, wide bandgap semiconductor gas sensors and micromachined and direct thermoelectric gas. Chemical Gas Sensors Based on Organic Semiconductor Polypyrrole Article in Critical Reviews in Analytical Chemistry 32(2) April with 75 Reads How we measure 'reads'Author: Karin Potje-Kamloth.

Gas sensors are meant to detect volatile compounds; when related to the human body these can be odour of urine, armpit sweat or exhaled breath. Seesaard et al. () report on an embroidered sensor that functions as a wearable electronic nose, also referred to as ‘e-nose’.

Functionalized single-wall carbon nanotube sensing materials were. Sensors and Actuators, 2 () - SEMICONDUCTOR GAS SENSORS S ROY MORRISON Physics Department, Simon Fraser University, Burnaby, B C V5A (Canada) Abstract The various ways that gaseous species can affect the resistance of a semi- conductor are discussed, with particular emphasis on those where the effect is reversible and, hence, Cited by: In this work the characteristics of a novel type of room temperature NO2 gas sensor device based on the surface photovoltage effect are described.

It was shown that for our SPV gas sensor device, using porous sputtered ZnO nanostructured thin films as the active gas sensing electrode material, the basic gas sensor characteristics in a toxic NO2 gas atmosphere are strongly Cited by: 2.

Consequently, the originally lower density carrier (hole vs. electron) with a faster charge transporting speed in the ambipolar semiconducting layer determines not only the gas sensing response nature but also the sensitivity. This is also true for the p-type organic semiconductor in terms of the gas sensing sensitivity.

A chemiresistor is a material that changes its electrical resistance in response to changes in the nearby chemical environment.

Chemiresistors are a class of chemical sensors that rely on the direct chemical interaction between the sensing material and the analyte. The sensing material and the analyte can interact by covalent bonding, hydrogen bonding, or molecular recognition. Organic thin film transistors have been a popular research topic in recent decades and have found applications from flexible displays to disposable sensors.

In this review, we present an overview of some notable articles reporting sensing applications for organic transistors with a focus on the most recent publications. In particular, we concentrate on three main types of organic transistor Cited by: Recent advances in “designer solvents” have facilitated the development of ultrasensitive gas sensing ionic liquids (SILs) based on quartz crystal microbalance (QCM) that can real‐time detect and discriminate volatile molecules.

The amalgamation of tailored‐made SILs and label‐free QCM resulted in a new class of qualitative and semi‐quantitative gas sensing device, which Author: Yi-Pin Chang, Yen-Ho Chu. A compound semiconductor is a semiconductor compound composed of chemical elements of at least two different species.

These semiconductors typically form in periodic table groups 13–15 (old groups III–V), for example of elements from the Boron group (old group III, boron, aluminium, gallium, indium) and from group 15 (old group V, nitrogen, phosphorus, arsenic, antimony.

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Gas sensors are employed in many applications spanning from security, environmental and pollution monitoring, healthcare, indoor and outdoor by: 5. My present research field includes thin films for transparent electronics, spintronics and gas sensing, studies on nanostructured inorganic and organic semiconductors, hybrid nanocomposites for advanced applications.

I a member of the team of projects: New. Other studies have revealed that the gas sensors based on indium oxide nanowires and In 2 O 3 thin films grown by the metal organic CVD technique showed good selectivity to NO 2 with little interference from other gases [].Cited by: Some Properties of Narrow-Gap Lead Chalcogenides (IV-VI Compound Semiconductors) Structure, binary compositions, alloying Band structure and Auger recombination Permittivities Defects and non–lattice-matched growth Growth on Si() and thermal-mismatch dislocation glide Applications.

The analysis of different parameters of metal oxides and the search of criteria, which could be utilized through material chosen for solid-state gas sensor applications, were the main objectives of this chapter.

Finally, the future horizons of such semiconductor nanomaterials for gas-sensing applications are also : Hassan Shokry Hassan, Marwa Farouk Elkady. Effects of Dielectric Material, HMDS Layer, and Channel Length on the Performance of the Perylenediimide-Based Organic Field-Effect TransistorsCited by: 4.

CONFERENCE PROCEEDINGS Papers Presentations Journals. Advanced Photonics Journal of Applied Remote Sensing. Materials science is a key research area for the development of technologies needed to address the energy and environmental challenges facing our society.

Since it began, Advanced Functional Materials has been publishing key papers in materials for energy production and storage. Here, two of the editors highlight areas of special prominence and discuss the. Some metal oxide semiconductors, such as tungsten trioxide or tin dioxide, are well-known as resistive transducers for gas sensing and offer high sensitivities down to the part per billion level.

Electrical signal read-out, however, limits the information obtained on the electronic properties of metal oxides to a certain frequency range and its application because of the required electrical Cited by: 5. The challenge for producing “invisible” electronic circuitry and opto-electronic devices is that the transistor materials must be transparent to visible light yet have good carrier mobilities.

This requires a special class of materials having “contra-indicated properties” because from the band structure point of view, the combination of transparency and conductivity is contradictory. Table Some examples of main finding from in situ and operando case studies of gas sensing on semiconducting metal oxides Method Oxides Gases Main findings O2 in N2, C3H6 and Ionisation of oxygen vacancies acetone in air Filling of oxygen vacancies; change of O2 in N2 the Ge coordination number CO and H2 in N2 Sn4+ and Pd2+ reduction as.

Epitaxial growth and characterization of compound semiconductor materials including III-Nitrides. Development of advanced structures for gas sensing, biosensing and optical detectors and emitters. Device fabrication and characterization for various electronic and photonics applications.

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The Goals And Scope Of This Review. The area of wireless sensing attracts tremendous research attention as indicated by the ~30, publications in the field (Figure 2).While there are several excellent reviews on different types of wireless and wearable sensors 8,9,24,25 and several books on physical wireless sensor networks, 26,27 no comprehensive Cited by: A sandwich-type (phthalocyaninato)(porphyrinato) europium double-decker complex Eu(TPyP){Pc-(OC 8 H 17) 8} [TPyP = meso-tetra(4-pyridyl)porphyrin; Pc-(OC 8 H 17) 8 = 2,3,9,10,16,17,23,octakis(octyloxy)phthalocyanine] (2) was designed and comparative studies, Eu(TPyP)(Pc) (1) was also ordered nanotubes of.

Abstract. There are enormous functional materials which have been explored for gas sensing applications due to the fact that when a particular gas interacts with their surfaces, some alteration in their properties (optical, electrical, etc.) is by: 1.

Another device based on semiconductors sensors was designed in order to discriminate healthy cells from cancer cells. The candidate took part as inventor in the patent fulfillment. Studies about the materials, components, technologies and applications of gas sensors conducted during the three years of PhD allowed to collect significant results.

Some MOFs display high thermal and chemical stability, which can be stable up to °C and resist a variety of reaction media either organic solvents or aqueous, even in acidic and basic solutions.

MOFs can be photoresponsive through light absorption by the organic linker, the metal oxide nodes or the photoactive species entrapped in the voids. These results, parallels with the other PTMOs, some recent studies [37, 41] and the discussion in the next section indicate that SnO surfaces do have an inherent tendency to exhibit electron accumulation in contrast to the surface depletion layer of the majority of n-type semiconductors.

In this way, optical gas sensing fills an important gap between lower cost sensors with inferior performance and high end laboratory equipment. Gas detection applications can cover a very wide range of gas concentrations.

The concentration is typically expressed as a proportion in air (or some other matrix) by by: Nanotechnology-based approaches to testing for COVID infections in high-risk individuals. In the absence of vaccines, many scientists argue that the best approach to control the spread of the Severe Acute Respiratory Syndrome Virus 2 (SARS-CoV-2) would be fast, cheap, reliable, and portable means of diagnosing COVID infection.

For example, the typical methane gas-sensing materials can be divided into semiconductor metal oxides, nanocomposites, organic polymer composites, cryptophane-A, carbon nanotubes and their doping materials etc. Semiconductor metal oxide nanomaterials such as SnO 2, ZnO, In 2 O 3, Fe 2 O 3, Co 3 O 4 are the most used methane gas-sensing Author: Yanbao Guo, Chengcheng Liu, Deguo Wang, Renyang He.

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Thecontributions reflect current research activities. Several studies demonstrating the use and performance optimization of nanodevices have been carried out at the single device level.

Despite some of the remarkable achievements in the progress of miniaturizing such devices, there is still a major challenge in terms of assembling the fundamental units with precise sub-nanometer spatial resolutions.

Experimental results indicate that the investigated complex, bis[2-(2-aminoethylamino)ethanol] copper(II) bromide, behaves as a semiconductor in the studied temperature range of – K.

Gas sensing properties of the film for the volatile organic compounds (VOCs): acetone, tetra-chloromethane, chloroform, ethanol, and methanol, were Cited by: 2.

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48, pp. 53 – 60, (IF: ). Matteo Tonezzer received his PhD degree “cum laude” from the Faculty of Physics at the University of Trento, Italy. His thesis was regarding the optimization of inorganic and organic nanostructured materials toward gas sensing. Inhe won the Young Scientist Award from the European Materials Research Society (EMRS)/5.

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ORL Z1. .Therefore, studies on semiconducting metal oxides, one of the most important gas sensing materials, have increasingly attracted attention from various disciplines.

The book offers a valuable reference guide to metal oxide gas sensing materials for .Use of nanostructured oxides for selective gas-sensing Y. Gönüllü ; B.

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