Relevant bibliographies by topics / Sol gel based optical ammonia sensor

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  1. Journal articles
  2. Dissertations / Theses
  3. Conference papers

Academic literature on the topic 'Sol gel based optical ammonia sensor'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 February 2022

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Journal articles on the topic "Sol gel based optical ammonia sensor"

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Lobnik, Aleksandra, and Otto S. Wolfbeis. "Sol-gel based optical sensor for dissolved ammonia." Sensors and Actuators B: Chemical 51, no. 1-3 (August 1998): 203–7. http://dx.doi.org/10.1016/s0925-4005(98)00189-0.

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Sung, Ti-Wen, and Yu-Lung Lo. "Ammonia vapor sensor based on CdSe/SiO2 core–shell nanoparticles embedded in sol–gel matrix." Sensors and Actuators B: Chemical 188 (November 2013): 702–8. http://dx.doi.org/10.1016/j.snb.2013.07.040.

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Salim, Musdalilah Ahmad, Halina Misran, S. Z. Othman, N. N. H. Shah, N. A. A. Razak, and Abreeza Manap. "Effect of NH3 on Structural and Optical Properties of SiO2-CuO Core-Shell Nanostructure." Applied Mechanics and Materials 465-466 (December 2013): 813–18. http://dx.doi.org/10.4028/www.scientific.net/amm.465-466.813.

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CuO nanoparticles at ca. 20-50 nm were successfully coated on monodispersed silica spheres prepared by modified sol-gel method. A renewable palm oil based decyl-alcohol (C10) was employed as nonsurfactant surface modifier prior to coating with CuO. Various amounts of ammonia (NH3) (0-1 ml) was as catalyst during the modification process to study the effect in homogeneous deposition of CuO on silica surfaces. The homogeneous depositions of CuO on silica were achieved with the addition of 0.9 ml of NH3. The optical absorption peak and energy band gap (Eg) values were at ca. 1.8-2.18 eV suitable for semiconductor and optical sensor materials.
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Aspiotis, N., A. El Sachat, L. Athanasekos, M. Vasileiadis, G. Mousdis, N. Vainos, and C. Riziotis. "Diffractive Ammonia Sensors Based on Sol–Gel Nanocomposites Materials." Sensor Letters 11, no. 8 (August 1, 2013): 1415–19. http://dx.doi.org/10.1166/sl.2013.2945.

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Wencel, D., B. D. MacCraith, and C. McDonagh. "High performance optical ratiometric sol–gel-based pH sensor." Sensors and Actuators B: Chemical 139, no. 1 (May 2009): 208–13. http://dx.doi.org/10.1016/j.snb.2008.12.066.

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Bhola, Bipin, Pavel Nosovitskiy, Hari Mahalingam, and William H. Steier. "Sol-Gel-Based Integrated Optical Microring Resonator Humidity Sensor." IEEE Sensors Journal 9, no. 7 (July 2009): 740–47. http://dx.doi.org/10.1109/jsen.2009.2020113.

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Campbell, A., and D. Uttamchandani. "Optical dissolved oxygen lifetime sensor based on sol-gel immobilisation." IEE Proceedings - Science, Measurement and Technology 151, no. 4 (July 1, 2004): 291–97. http://dx.doi.org/10.1049/ip-smt:20040421.

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Zhang, Jianxin, and Lei Zhou. "Preparation and Optimization of Optical pH Sensor Based on Sol-Gel." Sensors 18, no. 10 (September 21, 2018): 3195. http://dx.doi.org/10.3390/s18103195.

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Making use of the sol-gel technique, an optical pH sensor was prepared, which was made from an organic carrier with four indictors including congo red, bromophenol blue, cresol red, and chlorophenol red, cross-linked by tetraethyl orthosilicate (TEOS) and cellulose acetate. The actual detection range of the optical pH sensor is 2.5–11.0. The optimal ratio of ethyl orthosilicate, absolute ethanol, deionized water, and hydrochloric acid in glue precursor of the sensor-sensitive membrane was explored. The orthogonal experiment was designed to optimize the dosage of cellulose acetate, N,N-dimethylformamide (DMF), indicator, hydrochloric acid, and precursor glue in preparing the sensor-sensitive membrane. The linearity, measurement accuracy, repeatability, stability, and response time of the prepared pH sensor were tested. The measurement results were analyzed using a support vector machine and linear regression. The experimental results show that the optical pH sensor has a measurement accuracy of up to 0.2 pH and better stability and repeatability than the traditional pH glass electrode.
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Korent, Špela Mojca, Aleksandra Lobnik, and Gerhard J. Mohr. "Sol-gel-based optical sensor for the detection of aqueous amines." Analytical and Bioanalytical Chemistry 387, no. 8 (February 15, 2007): 2863–70. http://dx.doi.org/10.1007/s00216-007-1146-x.

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Сакалош, І. І., І. І. Трикур, М. Ю. Січка, and В. М. Різак. "Fiber optic sensor of ammonia based on bacteriorhodopsin film in a sol-gel matrix." Scientific Herald of Uzhhorod University.Series Physics 37 (July 1, 2015): 83–88. http://dx.doi.org/10.24144/2415-8038.2015.37.83-88.

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Dissertations / Theses on the topic "Sol gel based optical ammonia sensor"

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Seetohul, L. Nitin. "Novel applications of optical analytical techniques." Thesis, Teesside University, 2009. http://hdl.handle.net/10149/117905.

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Novel applications of optical analytical techniques have been demonstrated in three general areas, namely application of broadband cavity enhanced absorption spectroscopy (BBCEAS) to the detection of liquid phase analytes, the use of total luminescence spectroscopy to discriminate between different type of teas and the development of an optical sensor to detect ammonia gas, based on the fluorescence quenching of a dye immobilised in a sol gel matrix. A simple BBCEAS setup has been developed with a view to perform sensitive visible wavelength measurements on liquid phase solutions. In the present work a simple low-cost experimental setup has been demonstrated for the measurement of the visible spectra of representative liquid-phase analytes in a 2 mm quartz cuvette placed at normal incidence to the cavity mirrors. Measurements on Ho3+ and sudan black with a white LED and the R ≥ 0.99 mirrors covered a broad wavelength range (~250 nm) and represents the largest wavelength range covered to date in a single BBCEAS experiment. The sensitivity of the technique as determined by the best αmin value was 5.1 x 10-5 cm-1 and was obtained using the R ≥ 0.99 mirrors. The best limit of detection (LOD) for the strong absorber brilliant blue-R, was approximately 620 pM. The optical setup was then optimised for the application of BBCEAS detection to an HPLC system. A 1 cm pathlength HPLC cell with a nominal volume of 70 ml was used in this study. The cavity was formed by two R ≥ 0.99 plano-concave mirrors with a bandwidth of ~ 420 – 670 nm. Two analytes rhodamine 6G and rhodamine B were chosen for separation by HPLC, as they were chemically similar species with distinctive visible spectra and would co-elute in an isocratic separation. The lowest value of amin obtained was 1.9 x 10-5 cm-1. The most significant advantage of the HPLC-BBCEAS study over previous studies arose from the recording of the absorption spectrum over a range of wavelengths. It was demonstrated that the spectral data collected could be represented as a contour plot which was useful in visualising analytes which nearly co-eluted. The LOD values for the two analytes studied indicated that the developed HPLC-BBCEAS setup was between 54 and 77 times more sensitive than a commercial HPLC system. For improved sensitivity and lower detection limits the low cost BBCEAS setup was used with a significantly longer 20 cm pathlength cell where the mirrors were in direct contact with the liquid phase analyte. This also reduced interface losses. The experiments were carried out using both R ³ 0.99 and R ³ 0.999 mirrors. The lowest αmin value obtained in this study was 2.8 x 10-7 cm-1 which is the lowest reported value to date for a liquid phase measurement, making this study the most sensitive liquid phase absorption measurement reported. The lowest LOD recorded was 4.6 pM, and was obtained for methylene blue with the R ³ 0.999 mirrors. A novel application of total luminescence spectroscopy to discriminate between different types of teas objectively was also investigated. A pattern recognition technique based on principal component analysis (PCA) was applied to the data collected and resulted in discrimination between both geographically similar and dissimilar teas. This work has shown the potential of fluorescence spectroscopy to distinguish between seven types of teas from Africa, India, Sri Lanka and Japan. Geographically similar black teas from 15 different plantation estates in Sri Lanka were also studied. The visualisation technique allowed the separation of all 11 types of teas when the first two principal components were utilised. The final part of the thesis describes the development of an optical sensor for the detection of ammonia gas. The operation of the sensor depended on the fluorescence quenching of the dye 9 amino acridine hydrochloride (9 AAH) immobilised in a sol gel matrix. It was also shown that the sensor response was not affected by the presence of acidic gases such as HCl and SO2. The final version of the sensor made use of dual channel monitoring to improve the sensitivity of the sensor. Measurements using diluted mixtures of ammonia gas in the range 5 -70 ppm showed that the response of the sensor was nonlinear, with the sensitivity increasing at lower concentrations. The measurement of the baseline noise allowed the LOD to be estimated at ~400 ppb.
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Conference papers on the topic "Sol gel based optical ammonia sensor"

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Widmer, S., M. Dorrestijn, L. J. Scherer, and E. C. Constable. "E7.2 - Sol-Gel based Optical Ammonia Gas Sensor." In AMA Conferences 2013. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2013. http://dx.doi.org/10.5162/sensor2013/e7.2.

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Liu, Dejun, Arun Kumar Mallik, Wei Han, Fangfang Wei, Lei Sun, Jinhui Yuan, Chongxiu Yu, Gerald Farrell, Yuliya Semenova, and Qiang Wu. "Sol-gel silica coated optical fiber sensor for ammonia gas detection." In 2016 15th International Conference on Optical Communications and Networks (ICOCN). IEEE, 2016. http://dx.doi.org/10.1109/icocn.2016.7875756.

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Abdi, Abdeq M., Sistla S. Shastry, and A. G. Agwu Nnanna. "Dye Doped Clad Modified Evanescent Optical Fiber (CMEOF) Sensor Array for the Detection of Aqueous-Ammonia." In ASME 2008 International Mechanical Engineering Congress and Exposition. ASMEDC, 2008. http://dx.doi.org/10.1115/imece2008-67935.

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We are currently developing pH sensitive dye doped clad modified evanescent optical fiber (CMEOF) sensor array for the detection of aqueous-ammonia. The quasi-distribution of CMEOF ammonia sensors allows efficient measurement of aqueous-ammonia at several locations using a single fiber optic line. CMEOF sensors are fabricated by immobilized pH sensitive dyes in sol-gel and applying the dye doped sol-gel as a thin film around a bare core optical fiber. The CMEOF sensors are then sealed from water using a gas permeable membrane, PDMS-vinyl. The dyes in each CMEOF sensor are tailored to operate at slightly different wavelengths by appropriate choice of dyes. Wavelength-division-multiplexing (WDM) and linear system of equations (LSE) are used to interrogate each CMEOF sensor and determine the concentration of aqueous-ammonia at each sensor location.
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Lobnik, Aleksandra, Karlheinz Niederreiter, and Georg Uray. "Optical pH sensor based on sol-gel-doped new luminescent dye." In Photonics East '99, edited by Ronald E. Shaffer and Radislav A. Potyrailo. SPIE, 1999. http://dx.doi.org/10.1117/12.371297.

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Li, Jun, Weihong Tan, Kemin Wang, Xiaohai Yang, Zhiwen Tang, and Xiaoxiao He. "Optical DNA biosensor based on molecular beacon immobilized on sol-gel membrane." In International Conference on Sensing units and Sensor Technology, edited by Yikai Zhou and Shunqing Xu. SPIE, 2001. http://dx.doi.org/10.1117/12.440191.

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Lalam, Nageswara R., Ping Lu, Fei Lu, Tao Hong, Mudabbir Badar, and Michael P. Buric. "Distributed carbon dioxide sensor based on sol-gel silica-coated fiber and optical frequency domain reflectometry (OFDR)." In ODS 2020: Industrial Optical Devices and Systems, edited by Ryuichi Katayama and Yuzuru Takashima. SPIE, 2020. http://dx.doi.org/10.1117/12.2568653.

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Othman, Norliza, Wan Fazlida Hanim, Uzer Mohd Noor, and Sukreen Hana. "Optical pH sensor based on polyaniline sol-gel film immobilized with bromothymol blue and phenol red." In INTERNATIONAL CONFERENCE ON ADVANCED SCIENCE, ENGINEERING AND TECHNOLOGY (ICASET) 2015: Proceedings of the 1st International Conference on Advanced Science, Engineering and Technology. Author(s), 2016. http://dx.doi.org/10.1063/1.4965101.

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Alvarado-M‰ndez, Edgar, Daniel Hernßndez-Cruz, Roberto Rojas-Laguna, Jose A. Andrade-Lucio, Julian M. Estudillo-Ayala, M. Trejo-Durßn, Oscar G. Ibarra-Manzano, J. Erasmo Ponce-Ballesteros, and Roger A. Lessard. "pH sensor based on sol-gel silica layer deposited on a plastic optical fiber with blue bromophenol." In Photonics North, edited by John C. Armitage, Roger A. Lessard, and George A. Lampropoulos. SPIE, 2004. http://dx.doi.org/10.1117/12.567117.

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Lo, Yu-Lung, and Chen-Shane Chu. "Highly sensitive and linear optical fiber carbon dioxide sensor based on sol-gel matrix doped with silica particles and HPTS." In 20th International Conference on Optical Fibre Sensors, edited by Julian D. C. Jones. SPIE, 2009. http://dx.doi.org/10.1117/12.833521.

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Alvarado-Méndez, E., M. Trejo-Durán, J. M. Estudillo-Ayala, J. A. Andrade-Lucio, J. G. Aviña-Cervantes, A. Pérez-García, M. C. Peña-Gómar, and H. Zavala-Fernández. "Glucose Optical Fiber Sensor Based on Sol-Gel Technique with Ruthenium (III) Chloride Hydrate and Glucose Oxidase Enzyme." In MEDICAL PHYSICS: Ninth Mexican Symposium on Medical Physics. AIP, 2006. http://dx.doi.org/10.1063/1.2356433.

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