Volume holographic gratings as optical sensor for heavy metal in bathing waters

Bianco, G.; Ferrara, Maria Antonietta; Borbone, Fabio; Zuppardi, F.; Roviello, Antonio; Striano, V.; Coppola, Giuseppe

doi:10.1117/12.2179171

Cited by 11 publications

(9 citation statements)

References 12 publications

(11 reference statements)

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“…The near-infrared holographic glucose sensor described by Vezouviou and Lowe is likely also to be a good pH sensor. This is also true for the swelling-based holographic sensors for lead(II), ethanol, temperature, cocaine, all based on the use of swellable hydrogels, more recently in combination with molecular imprinting …”

Section: Sensing Formatsmentioning

confidence: 94%

Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications

2020

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This is the first comprehensive review on methods and materials for use in optical sensing of pH values and on applications of such sensors. The Review starts with an introduction that contains subsections on the definition of the pH value, a brief look back on optical methods for sensing of pH, on the effects of ionic strength on pH values and p K a values, on the selectivity, sensitivity, precision, dynamic ranges, and temperature dependence of such sensors. Commonly used optical sensing schemes are covered in a next main chapter, with subsections on methods based on absorptiometry, reflectometry, luminescence, refractive index, surface plasmon resonance, photonic crystals, turbidity, mechanical displacement, interferometry, and solvatochromism. This is followed by sections on absorptiometric and luminescent molecular probes for use pH in sensors. Further large sections cover polymeric hosts and supports, and methods for immobilization of indicator dyes. Further and more specific sections summarize the state of the art in materials with dual functionality (indicator and host), nanomaterials, sensors based on upconversion and 2-photon absorption, multiparameter sensors, imaging, and sensors for extreme pH values. A chapter on the many sensing formats has subsections on planar, fiber optic, evanescent wave, refractive index, surface plasmon resonance and holography based sensor designs, and on distributed sensing. Another section summarizes selected applications in areas, such as medicine, biology, oceanography, bioprocess monitoring, corrosion studies, on the use of pH sensors as transducers in biosensors and chemical sensors, and their integration into flow-injection analyzers, microfluidic devices, and lab-on-a-chip systems. An extra section is devoted to current challenges, with subsections on challenges of general nature and those of specific nature. A concluding section gives an outlook on potential future trends and perspectives.

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Section: Sensing Formatsmentioning

confidence: 94%

Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications

2020

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“…In the past decade, holography has become an area of great interest due to its wide and varied range of applications such as holographic digital microscopy, holographic tweezers, holographic solar concentrators, , sensors, − data storage, , and holographic interferometry . For many of these applications the material used to record the holograms is the key component, which is why significant research effort is dedicated to the development of holographic recording materials with improved properties.…”

Section: Introductionmentioning

confidence: 99%

Low-Toxicity Photopolymer for Reflection Holography

Cody¹,

Gribbin²,

Mihaylova

et al. 2016

ACS Appl. Mater. Interfaces

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A novel composition for a low-toxicity, water-soluble, holographic photopolymer capable of recording bright reflection gratings with diffraction efficiency of up to 50% is reported. The unique combination of two chemical components, namely, a chain transfer agent and a free radical scavenger, is reported to enhance the holographic recording ability of a diacetone acrylamide (DA)-based photopolymer in reflection mode by 3-fold. Characterization of the dependence of diffraction efficiency of the reflection gratings on spatial frequency, recording intensity, exposure energy, and recording wavelength has been carried out for the new low-toxicity material. The use of UV postexposure as a method of improving the stability of the photopolymer-based reflection holograms is reported. The ability of the modified DA photopolymer to record bright Denisyuk holograms which are viewable in different lighting conditions is demonstrated.

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“…Furthermore, in a hologram, any physical or chemical stimulus can produce changes in the diffraction grating spacing or in the refractive index modulation. This will result in a modification of the diffracted and transmitted beams that can be used to develop a detection method or a specific sensor [ 4 , 5 , 6 ]. Hologram based sensors were first proposed by Lowe’s group [ 7 ] and since then, they have been applied for the sensing of different analytes with great performance.…”

Section: Introductionmentioning

confidence: 99%

Processing of Holographic Hydrogels in Liquid Media: A Study by High-Performance Liquid Chromatography and Diffraction Efficiency

et al. 2022

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The storage of time-stable holographic gratings in hydrogel matrices when the material is immersed in aqueous media is a real challenge at present. The optimization of the storage stages of the holograms must be properly investigated to identify the most suitable development processes. For this reason, this work is focused on the study of the optimization of the washing stages of the hydrogels based on acrylamide and N,N’-methylenebis(acrylamide) once unslanted transmission holograms have been stored. High-performance liquid chromatography and UV-visible measurements have been employed in our system to analyze the composition of the washing solutions. PBST and DMSO:H2O are used as solvents in the washing stages. The diffraction efficiencies are measured during the washing stages and after the storing of the holograms during several days in PBST. Maximum diffraction efficiencies of 38 and 27.6% are reached when PBST and DMSO:H2O are employed, respectively, for the washing process. Holograms show temporal stability after being stored immersed in PBST at 4 °C for 4 days.

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Volume holographic gratings as optical sensor for heavy metal in bathing waters

Cited by 11 publications

References 12 publications

Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications

Optical Sensing and Imaging of pH Values: Spectroscopies, Materials, and Applications

Low-Toxicity Photopolymer for Reflection Holography

Processing of Holographic Hydrogels in Liquid Media: A Study by High-Performance Liquid Chromatography and Diffraction Efficiency

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