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Your search keyword '"Electrostatic Self Assembly method"' showing total 2 results
Start Over Descriptor "Electrostatic Self Assembly method" Topic atomic and molecular physics, and optics
2 results on '"Electrostatic Self Assembly method"'

1. Sensitivity Improvement of a Humidity Sensor Based on Silica Nanospheres on a Long-Period Fiber Grating

Author

Francisco M. Araújo, Jose Luis Santos, Javier Goicoechea, Francisco J. Arregui, Ignacio R. Matias, Diana Viegas, Luis Alberto Ferreira, Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica, and Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila more...

Subjects
Materials science, Nanotechnology, 02 engineering and technology, Long period fiber grating, engineering.material, lcsh:Chemical technology, 01 natural sciences, Biochemistry, Article, Analytical Chemistry, 020210 optoelectronics & photonics, Coating, Coatings, Humidity sensor, long-period fiber grating, nanospheres, electrostatic self-assembly, 0202 electrical engineering, electronic engineering, information engineering, lcsh:TP1-1185, Electrical and Electronic Engineering, Instrumentation, Fiber gratings, business.industry, 010401 analytical chemistry, Humidity, Long-period fiber grating, Cladding (fiber optics), Atomic and Molecular Physics, and Optics, 0104 chemical sciences, Wavelength, Nanofilms, engineering, Optoelectronics, Electrostatic self assembly method, Effective refractive index, business, Refractive index, Nanospheres
Abstract

This work addresses a new configuration that improves the sensitivity of a humidity sensor based on a long-period fiber grating coated with a SiO(2)-nanospheres film. An intermediate higher refractive index overlay, deposited through Electrostatic Self-Assembly, is placed between the fiber cladding and the humidity sensitive film in order to increase the total effective refractive index of the coating. With this intermediate design, a three-fold improvement in the sensitivity was obtained. Wavelength shifts up to 15 nm against 5 nm were achieved in a humidity range from 20% to 80%. This work was supported in part by Fundação para a Ciência e Tecnologia (FCT) with the grant SFRH/BD/30086/2006 more...

Published
2009
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2. Development of an in-fiber nanocavity towards detection of volatile organic gases

Author

Ignacio R. Matias, Candido Bariain, Cesar Elosua, Francisco J. Arregui, Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica, and Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektriko eta Elektronikoa Saila more...

Subjects
Identification, Optical fiber, Materials science, Assembly monolayer process, Vapochromic complex, Dioxide, Nanotechnology, lcsh:Chemical technology, Biochemistry, Signal, Full Research Paper, Electronic nose, Analytical Chemistry, law.invention, Electrostatic Self Assembly method, Complexes, law, Volatile Organic Compound, Fiber optic sensors, Nano, nanocavity, Volatile organic compound, lcsh:TP1-1185, Fiber, Electrical and Electronic Engineering, Instrumentation, chemistry.chemical_classification, Array, Humidity sensor, Fiber optic sensor, Atomic and Molecular Physics, and Optics, Nanocavity, chemistry, Fabry Perot interferometer, Electrostatic self assembly method, Fabry–Pérot interferometer
Abstract

A fiber optic sensor for Volatile Organic Compounds (VOCs) detection has been developed and characterized for some organic gasses. The sensor is based on a novel vapochromic material, which is able to change its optical properties in presence of organic vapors in a reversely way. A nano Fabry Perot is constructed onto a cleaved ended optical fiber pigtail by Electrostatic Self Assembly method (ESA), doping this structure with the vapochromic material. Employing a reflection scheme, a change in the intensity modulated reflected signal at 850 nm have been registered. The response of the sensor has been evaluated for five different VOCs, and a deeper study has been made for vapors of three different alcohols. This work was supported by Spanish Ministerio de Ciencia y Tecnología and FEDER Research Grants CICYT-TIC 2003-000909 and CICYT-TEC 2004-05936-C02-01/MIC. more...

Published
2006

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