Optical fiber nanometer-scale Fabry–Perot interferometer formed by the ionic self-assembly monolayer process

Arregui, Francisco J.; Matı́as, Ignacio R.; Liu, Yanjing; Lenahan, Kristie M.; Claus, Richard O.

doi:10.1364/ol.24.000596

Cited by 81 publications

(46 citation statements)

References 5 publications

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“…Thin films were fixed to a glass substrate which located at the end of a bifurcated optical fiber. Electrostatic selfassembly was applied in fabrication of a Fabry-Perot cavity at the end of fiber [105]. A fiber optic humidity sensor was designed based on the FP cavity since the reflection intensity varies with the reflection coefficient of the external mirror [106].…”

Section: Sensing Schemesmentioning

confidence: 99%

“…FP cavities [105] or gratings [194] can be formed on the fiber end by direct deposition of thin film. The composition of the nanofilm is selected according to the sensing application.…”

Section: Polyelectrolyte Self-assembly On Fiber and Sensormentioning

confidence: 99%

“…It was reported that some polyelectrolyte selfassembled films have similar characteristics on silicon wafers and optical fibers [105].…”

Section: Self-assembly On Fiber Endmentioning

confidence: 99%

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Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

et al. 2005

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(ABSTRACT)Fiber-optic Fabry-Perot interferometric (FFPI) sensors have been widely used due to their high sensitivity, ease of fabrication, miniature size, and capability for multiplexing. However, direct measurement of self-assembled thin films, receptor immobilization process or biological reaction is limited in the FFPI technique due to the difficulty of forming Fabry-Perot cavities by the thin film itself. Novel methods are needed to provide an accurate and reliable measurement for monitoring the thin-film growth in the nanometer range and under various conditions. In this work, two types of fiber-optic multicavity Fabry-Perot interferometric (MFPI) sensors with built-in temperature compensation were designed and fabricated for thin-film measurement, with applications in chemical and biological sensing. Both the tubing-based MFPI sensor and microgap MFPI sensor provide simple, yet high performance solutions for thin-film sensing. The temperature dependence of the sensing cavity is compensated by extracting the temperature information from a second multiplexed cavity. This provides the opportunity to examine the thin-film characteristics under different environment temperatures.To demonstrate the potential of this structure for practical applications, immunosensors were fabricated and tested using these structures. Self-assembled polyelectrolytes served as a precursor film for immobilization of antibodies to ensure they retain their biological activity. This not only provides a convenient method for protein immobilization but also presents the possibility of increasing the binding capacity

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Section: Sensing Schemesmentioning

confidence: 99%

“…FP cavities [105] or gratings [194] can be formed on the fiber end by direct deposition of thin film. The composition of the nanofilm is selected according to the sensing application.…”

Section: Polyelectrolyte Self-assembly On Fiber and Sensormentioning

confidence: 99%

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Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

et al. 2005

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“…The thicker PAH/SiO 2 film leads to an increase in the sensitivity of the optical fibre humidity sensor. The increase of the geometrical thickness leads to a sinusoidal-type change in the reflection (tracked at specific wavelengths) whose intensity depends on the number of layers [15], [18]. For three bilayers, the sensitivity was 0.26 mV/%RH, for four bilayers sensitivity increased to 0.53 mV/%RH and for nine bilayers, the sensitivity increased to 2.28 mV/%RH (Fig.…”

Section: E Sensor Testing In a Breathing Circuit Connected To A Posimentioning

confidence: 99%

Characterization and Use of a Fiber Optic Sensor Based on PAH/SiO₂ Film for Humidity Sensing in Ventilator Care Equipment

Hernández

Morgan

Hayes-Gill

et al. 2016

IEEE Trans. Biomed. Eng.

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The user has requested enhancement of the downloaded file. IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING 1 Abstract-Objective: To develop a compact probe that can be used to monitor humidity in ventilator care equipment. A mesoporous film of alternate layers of Poly(allylamine hydrochloride) (PAH) and silica (SiO 2 ) nanoparticles (bilayers), deposited onto an optical fibre was used. The sensing film behaves as a Fabry-Perot cavity of low-finesse where the absorption of water vapour changes the optical thickness and produces a change in reflection proportional to humidity. Methods: The mesoporous film was deposited upon the cleaved tip of an optical fibre using the layer-by-layer method. The sensor was calibrated in a bench model against a commercially available capacitive sensor. The sensitivity and response time were assessed in the range from 5 % relative humidity (RH) to 95 %RH for different numbers of bilayers up to a maximum of nine. Results: The sensitivity increases with the number of bilayers deposited; sensitivity of 2.28 mV/%RH was obtained for nine bilayers. The time constant of the response was 1.13 s ± 0.30 s which is faster than the commercial device (measured as 158 s). After calibration, the optical fibre humidity sensor was utilised in a bench top study employing a mechanical ventilator. The fast response time enabled changes in humidity in individual breaths to be resolved. Conclusion: Optical fibre sensors have the potential to be used to monitor breath to breath humidity during ventilator care. Significance: Control of humidity is an essential part of critical respiratory care and the developed sensor provides a sensitive, compact and fast method of humidity monitoring.Index Terms-Humidity sensor, relative humidity, FabryPerot, layer-by-layer (LbL), intensive care unit, critical care, optical fibre sensor.

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“…This reflected power can be measured in the detector after passing again through the coupler. As the thickness of the cavity is shorter than the coherence length of a LED source, it is possible to use this kind of sources, avoiding the use of lasers [16][17][18][19][20]. This fact and the simplicity of this architecture have allowed the development of many kinds of optical fiber sensors based on it.…”

Section: Interferometric Nano-cavitiesmentioning

confidence: 99%

Nanostructured Materials in Optical Fiber Sensing

Hernáez¹

2013

TOOPTSJ

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This work comprehends a review of nanostructured materials employed in the fabrication of optical fiber sensors in the last years. The continuous advances in nanofabrication techniques have enabled to manipulate the matter precisely producing well defined nanostructurated coatings or repetitive patterns at nanoscale level. The interactions of light with these nano-organized materials or patterns at the nanoscale level enable to observe interesting phenomena, such as interferometry, fluorescence, absorbance, resonances and many others which can be exploited in the fabrication of sensing devices. A particular case consists of optical fiber sensors, where the light travelling through an optical fiber interacts with the sensitive layer. The properties of the sensitive layer, such as the organization, physical properties, chemical bounds etc. will determine the sensing characteristics of the final device. The utilization of some of the most common nanostructured materials, such as polymers, nanoparticles, metals, metal oxides or biological coatings are reviewed here.

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Optical fiber nanometer-scale Fabry–Perot interferometer formed by the ionic self-assembly monolayer process

Cited by 81 publications

References 5 publications

Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

Characterization and Use of a Fiber Optic Sensor Based on PAH/SiO₂ Film for Humidity Sensing in Ventilator Care Equipment

Nanostructured Materials in Optical Fiber Sensing

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Optical fiber nanometer-scale Fabry–Perot interferometer formed by the ionic self-assembly monolayer process

Cited by 81 publications

References 5 publications

Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

Miniature fiber-optic multicavity Fabry–Perot interferometric biosensor

Characterization and Use of a Fiber Optic Sensor Based on PAH/SiO2 Film for Humidity Sensing in Ventilator Care Equipment

Nanostructured Materials in Optical Fiber Sensing

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Product

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Characterization and Use of a Fiber Optic Sensor Based on PAH/SiO₂ Film for Humidity Sensing in Ventilator Care Equipment