Kinetics of adsorption–desorption processes of alcohol molecules in porous silicon Bragg mirror

Ivanov, I.I.; Skryshevsky, V. A.; Serdiuk, Tetiana; Lysenko, V.

doi:10.1016/j.snb.2012.02.056

Cited by 20 publications

(8 citation statements)

References 20 publications

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“…The obtained results of water adsorption/desorption on the PS-ox surface are in a good agreement with the ones observed recently [3, 26, 27] and indicate that novel type transducer/sensor can be proposed on the base of the refractive NLO response efficiency monitoring within the self-action of picosecond laser pulses at 1064 nm.…”

Section: Resultssupporting

confidence: 90%

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Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

et al. 2017

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The porous silicon (PS) surface modification diagnostics due to functionalization and water adsorption/desorption processes were provided by the self-action effects of picosecond range pulsed laser radiation at 1064 nm. It was shown that the PS surface functionalization—oxide removal, alkylation, and oxidation—resulted in a refractive nonlinear optical (NLO) response sign turn to self-focusing (Δn>0) versus the self-defocusing (Δn<0) observed in the aged PS. The sensitivity of the proposed technique was revealed to water adsorption/desorption from the chemically oxidized PS interface. For the dried PS, the self-defocusing effect with corresponding NLO cubic susceptibility Re(χ (3))∼−4.7·10−9 esu was observed versus the self-focusing one (∼5·10−8 esu) for the PS positioned in saturated water vapor at room temperature. The obtained results demonstrate high sensitivity and wide versatility of the proposed readout technique based on pulsed laser radiation self-action at 1064 nm to the PS surface modification monitoring/diagnostics applications.

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Section: Resultssupporting

confidence: 90%

“…An interesting example is the field of Si sensors. Multiple applications of the PS in sensors technology are mainly based on significant electrical or optical properties changes [2, 3] due to the adsorption of the molecules for gas, humidity, biological sensing, and others [4]. …”

Section: Introductionmentioning

confidence: 99%

Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

et al. 2017

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“…17 refractive index, thus affecting the distributed Bragg reflector (DBR) sensor parameters such as the spectral position, intensity, and width of the PBGs. 18 PS microcavities, on the other hand, provide the opportunity to sharpen the broad spectral response of DBRs. The geometrical structure of the microcavity consists of two parallel mirrors separated by a spacer layer with an optical thickness of λ or λ/2 19 to display a single photon mode.…”

Section: Introductionmentioning

confidence: 99%

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

2023

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In this article, the authors theoretically and experimentally investigated ways to improve the efficiency of porous silicon (PS)-based optical microcavity sensors as a 1D/2D host matrix for electronic tongue/nose systems. The transfer matrix method was used to compute reflectance spectra of structures with different [n L n H ] sets of low n L and high n H bilayer refractive indexes, the cavity position λ c , and the number of bilayers N bi . Sensor structures were prepared by electrochemically etching a silicon wafer. The kinetics of adsorption/desorption processes of ethanol−water-based solution was monitored in real time with a reflectivity probe-based setup. It was theoretically and experimentally demonstrated that the sensitivity of the microcavity sensor is higher for structures with refractive indexes in the lower range (and the corresponding porosity values in the upper range). The sensitivity is also improved for structures with the optical cavity mode (λ c ) adjusted toward longer wavelengths. The sensitivity of a distributed Bragg reflector (DBR) with cavity increases for a structure with cavity position λ c in the long wavelength region. The full width at half maximum (fwhm c ) of the microcavity is smaller and the quality factor of microcavity (Q c ) is higher for the DBR with a larger number of structure layers N bi . The experimental results are in good agreement with the simulated data. We believe that our results can help in developing rapid, sensitive, and reversible electronic tongue/nose sensing devices based on a PS host matrix.

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“…18 Photonic porous silicon (PSi) nanostructures have also proven to be versatile tools for chemo-and biosensing. [19][20][21][22][23] A single component optical "nose" based on stacked PSi rugate photonic crystals capable of identifying organic vapours at parts-per-million (ppm) concentrations via time-resolved diffusion dri analysis was suggested by Kelly et al 24 In terms of cell monitoring, a number of photonic crystal-inspired visualisation platforms have been developed recently. 25 The need for quantitative, time-resolved analysis of a multitude of vital cellular processes, such as cell differentiation, chemotaxis, apoptosis, metastasis, wound healing, cell surface attachment and others without sample pre-xing has sparked the development of an imaging technique known as photonic crystal enhanced microscopy (PCEM).…”

Section: Introductionmentioning

confidence: 99%

Bringing one-dimensional photonic crystals to a new light: an electrophotonic platform for chemical mass transport visualisation and cell monitoring

et al. 2015

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Photonic sensor technologies represent an important milestone in monitoring complex physical, chemical and biological systems. We present an integrated chemo- and bio-photonic sensing scheme drawing on the integration of one-dimensional (1D) stimuli-responsive photonic crystals (PCs) with an electrophotonic visualisation platform. We demonstrate various modi operandi, including the real-time mapping of spatial concentration distribution of a chemical analyte and the in situ monitoring of adhesive cell cultures, enabled by the modular combination of stimuli-responsive 1D PCs with various light emitters and detectors

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Kinetics of adsorption–desorption processes of alcohol molecules in porous silicon Bragg mirror

Cited by 20 publications

References 20 publications

Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

Impact of Water Adsorption on Nonlinear Optical Properties of Functionalized Porous Silicon

Engineering Porous Silicon-Based Microcavity for Chemical Sensing

Bringing one-dimensional photonic crystals to a new light: an electrophotonic platform for chemical mass transport visualisation and cell monitoring

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