Bioinspired Optoelectronic Nose with Nanostructured Wavelength‐Scalable Hollow‐Core Infrared Fibers

Yıldırım, Adem; Vural, Mert; Yaman, Mecit; Bayındır, Mehmet

doi:10.1002/adma.201004052

Cited by 34 publications

(35 citation statements)

References 32 publications

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“…On the other hand, samples spiked with 5% alcohol resulted in a significant decrease in the fiber transmissions, which is in good accordance with the results of alcohol water mixture experiments. As we previously reported, 27 the sensitivity of the optoelectronic nose is around low parts per million (ppm) levels (comparable with the sensitivity of FT-IR spectroscopy) since a blackbody light source was used in the optoelectronic nose design. The sensitivity of the nose is not high enough to smell the volatiles in these beverages, which might have concentrations in the vapor phase lower than 1 ppm.…”

Section: ■ Results and Discussionmentioning

confidence: 94%

Smelling in Chemically Complex Environments: An Optofluidic Bragg Fiber Array for Differentiation of Methanol Adulterated Beverages

2013

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A novel optoelectronic nose for analysis of alcohols (ethanol and methanol) in chemically complex environments is reported. The crossresponsive sensing unit of the optoelectronic nose is an array of three distinct hollow-core infrared transmitting photonic band gap fibers, which transmit a specific band of IR light depending on their Bragg mirror structures. The presence of alcohol molecules in the optofluidic core quenches the fiber transmissions if there is an absorption band of the analyte overlapping with the transmission band of the fiber; otherwise they remain unchanged. The cumulative response data of the fiber array enables rapid, reversible, and accurate discrimination of alcohols in chemically complex backgrounds such as beer and fruit juice. In addition, we observed that humidity of the environment has no effect on the response matrix of the optoelectronic nose, which is rarely achieved in gas-sensing applications. Consequently, it can be reliably used in virtually any environment without precalibration for humidity or drying the analytes. Besides the discussed application in counterfeit alcoholic beverages, with its superior sensor parameters, this novel concept proves to be a promising contender for many other applications including food quality control, environmental monitoring, and breath analysis for disease diagnostics.

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Section: ■ Results and Discussionmentioning

confidence: 94%

Smelling in Chemically Complex Environments: An Optofluidic Bragg Fiber Array for Differentiation of Methanol Adulterated Beverages

2013

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“…Therefore, the extra fibers can be selected appropriately to differentiate more chemicals; for example, we recently showed that six fibers can be easily used to resolve 10 chemicals. 21 The suitable choice of a threshold value results in a unique binary fingerprint for each chemical in the measurement data set. It is essential to note that the threshold value should be wider than the standard deviation of the experimental error in the quenching values to accommodate experimental noise; that is, the binary representation for each chemical should remain unchanged due to the signal noise.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…21 Such design enables detection of any infrared absorbing chemical based on the detection of its infrared absorption pattern by spanning the whole spectrum with the sensing fiber array. The specialty PBG fibers are produced, by controlling fiber drawing parameters, to guide a specified spectral band from the whole infrared spectrum relevant to organic molecules.…”

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confidence: 99%

High Selectivity Boolean Olfaction Using Hollow-Core Wavelength-Scalable Bragg Fibers

et al. 2011

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A new odorant detection scheme, based on infrared absorption of volatile organics inside an optofluidic channel array, is discussed in terms of its selectivity. The sensor unit of the array is a hollow core Bragg fiber that selectively (spectrally) guides an incident continuum radiation. The presence of infrared absorbing molecules in the channel results in the quenching of the otherwise transmitted signal. Each fiber unit in the array is designed and fabricated so that it is sensitive to specific chemical bonds and the bond environment, but at the same time, each fiber is also broadly sensitive to a large number of chemicals due to their infrared absorbance spectra. The cumulative array response data, using an appropriate threshold, enable selective binary sampling of the infrared fingerprint of hundreds of molecules. The selectivity of the system is quantitatively investigated with computer simulations and found to be exponentially increasing with the number of fibers in the array. Relatively simple data analysis using binary logic combined with the high selectivity of the novel scheme paves the way for ubiquitous application of electronic noses in toxic gas detection, food quality control, environmental monitoring, and breath analysis for disease diagnostics.

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“…[29][30][31][32] This simple and robust manufacturing process enables to maintain well defi ned material geometries along the length of the fi ber. In this work, we utilized fi ber drawing method to modify fi ber surface morphology in order to obtain enhanced anisotropic wetting on fi ber surfaces.…”

Section: Fabrication Of Textured Fibersmentioning

confidence: 99%

Surface Textured Polymer Fibers for Microfluidics

Yıldırım

Yunusa

Öztürk

et al. 2014

Adv Funct Materials

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Cataloged from PDF version of article.This article introduces surface textured polymer fibers as a new platform for the fabrication of affordable microfluidic devices. Fibers are produced tens of meters-long at a time and comprise 20 continuous and ordered channels (equilateral triangle grooves with side lengths as small as 30 micrometers) on their surfaces. Extreme anisotropic spreading behavior due to capillary action along the grooves of fibers is observed after surface modification with polydopamine (PDA). These flexible fibers can be fixed on any surface - independent of its material and shape - to form three-dimensional arrays, which spontaneously spread liquid on predefined paths without the need for external pumps or actuators. Surface textured fibers offer high-throughput fabrication of complex open microfluidic channel geometries, which is challenging to achieve using current photolithography-based techniques. Several microfluidic systems are designed and prepared on either planar or 3D surfaces to demonstrate outstanding capability of the fiber arrays in control of fluid flow in both vertical and lateral directions. Surface textured fibers are well suited to the fabrication of flexible, robust, lightweight, and affordable microfluidic devices, which expand the role of microfluidics in a scope of fields including drug discovery, medical diagnostics, and monitoring food and water quality. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

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Bioinspired Optoelectronic Nose with Nanostructured Wavelength‐Scalable Hollow‐Core Infrared Fibers

Cited by 34 publications

References 32 publications

Smelling in Chemically Complex Environments: An Optofluidic Bragg Fiber Array for Differentiation of Methanol Adulterated Beverages

Smelling in Chemically Complex Environments: An Optofluidic Bragg Fiber Array for Differentiation of Methanol Adulterated Beverages

High Selectivity Boolean Olfaction Using Hollow-Core Wavelength-Scalable Bragg Fibers

Surface Textured Polymer Fibers for Microfluidics

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