Chemical Sensors
Mostrando 13-24 de 87 artigos, teses e dissertações.
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13. Synthesis of the Perovskite-Type BaCe0.8Pr0.05Cu0.15O3-δ via EDTA-Citrate
BaCeO3-based ceramics are ionic and electronic conductors that can be applied to oxygen sensors, solid oxide fuel cells and oxygen permeable membranes. However, the low chemical stability at high temperatures of these materials motivates studies involving doping of A and/or B sites of the perovskite structure. In this context, the present work aimed to synth
Mat. Res.. Publicado em: 06/11/2017
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14. Estudo do efeito dos parâmetros de síntese na condutividade elétrica do compósito fluoreto de polivinilideno / polianilina
ABSTRACT The electroactive polymers have been the subject of many studies in the last decade, mainly because its unique properties. They are used in composite structures, which allow its application in many fields, as for example, sensors and artificial muscles. The electrical properties of these composites are influenced by the doping state of the electroac
Matéria (Rio J.). Publicado em: 10/08/2017
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15. Mechanisms of Ion Detection for FET-Sensors Using FTO: Role of Cleaning Process, pH Sequence and Electrical Resistivity
The use of FTO samples as an extended gate field effect transistor biosensor is presented. The FTO samples were produced by spray pyrolysis technique. The cleaning process is shown to have a fundamental importance for the final sensitivity of the samples when multiple re-usage is adopted. The role of electrical resistivity and morphology of the films are inv
Mat. Res.. Publicado em: 31/07/2017
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16. Classification of Flying Insects with high performance using improved DTW algorithm based on hidden Markov model
ABSTRACT Insects play significant role in the human life. And insects pollinate major food crops consumed in the world. Insect pests consume and destroy major crops in the world. Hence to have control over the disease and pests, researches are going on in the area of entomology using chemical, biological and mechanical approaches. The data relevant to the fl
Braz. arch. biol. technol.. Publicado em: 23/01/2017
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17. Energetic and electronic properties in a multilayered ZnO graphene-like nanostructure
Nanostructures based on ZnO have been widely studied due to their electronic and piezoelectric properties. Experimental studies have shown that thin films based on ZnO can be used as chemical and optoelectronic sensors. The great goal of this work is to study of the role of the number of graphene-like layers in the physical properties of the ZnO. Therefore,
Mat. Res.. Publicado em: 28/03/2016
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18. Estudio de estructuras de cis- y trans-estilbeno mediante microscopiade fuerza atómica
ABSTRACTNanotechnology is a multidisciplinary field that emerged in recent years due to the development of tools to "see", study and manipulate matter at atomic and molecular levels. Stilbene and some of its derivatives are organic molecules found in nature, which have chemical structures of interest in nano-fabrication of molecular machine building blocks (
Matéria (Rio J.). Publicado em: 2015-09
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19. Electronic tongue system to evaluate flavor of soybean (Glycine Max (L.) Merrill) genotypes
An electronic tongue system was tested as a fast and efficient analytical tool for flavor evaluation of soybean genotypes. Grain samples of 25 soybean lines were analyzed using 0.25 g of milled samples added to 100 mL of distilled water and mixing for one minute on a magnetic stirrer. An aliquot (50 mL) from the filtered liquid was used for the analysis on a
Braz. arch. biol. technol.. Publicado em: 2014-10
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20. Study and characterization of indium oxynitride photoconductors
Multifunctional materials are a new class of thin films and coatings. These materials show interesting characteristics for application in many scientific areas, in special electronic and photonic technologies. These characteristics include sensitivity for thermal, light, mechanical, chemical and other influences, high resistivity, high electrical isolation a
Mat. Res.. Publicado em: 03/12/2013
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21. Indium tin oxide synthesized by a low cost route as SEGFET pH sensor
Polycrystalline ITO films with good optoelectronics characteristics and homogeneous surface has been obtained upon annealing at 550 °C in N² atmosphere using a low-cost chemical vapor deposition (CVD) system. The films were evaluated as pH sensors in separative extended gate field-effect transistor (SEGFET) apparatus, exhibiting a sensitivity of 53 mV/pH,
Mat. Res.. Publicado em: 02/07/2013
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22. Polímeros impressos com íons: fundamentos, estratégias de preparo e aplicações em química analítica
Chemical imprinting technology has been widely used as a valuable tool in selective recognition of a given target analyte (molecule or metal ion), yielding a notable advance in the development of new analytical protocols. Since their discovery, molecularly imprinted polymers (MIPs) have been extensively studied with excellent reviews published. However, stud
Quím. Nova. Publicado em: 2013
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23. Desenvolvimento de materiais e métodos de fabricação de sensores químicos/bioquímicos baseados em silício e nanoestruturas de carbono (ISFET, CNTFET e GraFET) : Development of materials and methods of fabrication of chemical/biochemical sensors based on silicon and carbon nanostructures (ISFET, CNTFET and GraFET) / Development of materials and methods of fabrication of chemical/biochemical sensors based on silicon and carbon nanostructures (ISFET, CNTFET and GraFET)
Este trabalho teve como objetivo o desenvolvimento de materiais e métodos avançados de fabricação de sensores químicos/bioquímicos. Utilizando equipamentos disponíveis no Centro de Componentes Semicondutores da UNICAMP, foram desenvolvidos e caracterizados filmes finos de alta constante dielétrica e filmes metálicos. Os materiais desenvolvidos foram
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/07/2012
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24. Novas metodologias para compressão de dados de processos e para o ajuste do Sistema PI
The consolidation of the automation in the chemical industry has brought a challenge: translating the large volume of data in useful information. With the advent of digital systems, the expansion in the development of sensors and sampling methods allowed the acquisition of a large amount of data from the process field. Thus, nowadays, engineers and operators
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012