Advances in chalcogenide fiber evanescent wave biochemical sensing

Lucas, Pierre; Riley, Mark R.; Boussard‐Plédel, Catherine; Bureau, Bruno

doi:10.1016/j.ab.2005.10.045

Cited by 84 publications

(55 citation statements)

References 68 publications

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“…Such sensors are generally referred to as evanescent-field sensors, reflecting the fact that only the evanescent tail of the guided mode is available for light-matter interactions. Examples of fibre geometries used for evanescent-based sensing include; tapered fibres [8,9], D-shaped fibres [10], optical nanowires [11], solid-core MOFs [5,12], multi-core MOFs [3,4] [2,3,4,7,10], the benefits that can be obtained using MOFs are far from being realised, largely due to the lack of a formalism for predicting and thus optimizing the measurable fluorescence power. Although models of the efficiency of fluorescence-based optical fibre sensors have been developed for simple structures such as tapered or D-shaped fibres, they have limited applicability because; 1) it is assumed that the modes of the fibre are the same at both the absorption and fluorescence wavelengths and 2) they are based on ray-optics [1,21] or scalar electromagnetic fields (without including the effect of absorption loss) [8].…”

Section: Introductionmentioning

confidence: 99%

Enhancement of fluorescence-based sensing using microstructured optical fibres

Afshar¹,

Warren‐Smith²,

Monro³

2007

Opt. Express

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Section: Introductionmentioning

confidence: 99%

Enhancement of fluorescence-based sensing using microstructured optical fibres

Afshar¹,

Warren‐Smith²,

Monro³

2007

Opt. Express

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“…These new techniques require the development of materials that can effectively collect and transmit the infrared signal but which can also be shaped into appropriate optical components. The recent development of infrared Fiber Evanescent Wave Spectroscopy (FEWS) is an example of such technologies [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Opto-electrophoretic detection of bio-molecules using conducting chalcogenide glass sensors

Yang¹,

Fah²,

Reynolds³

et al. 2010

Opt. Express

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Novel telluride glasses with high electrical conductivity, wide infrared transparency and good resistance to crystallization are used to design an opto-electrophoretic sensor for detection and identification of hazardous microorganisms. The sensor is based on an attenuated total reflectance element made of Ge-As-Te glass that serves as both an optical sensing zone and an electrode for driving the migration of bio-molecules within the evanescent wave of the sensor. An electric field is applied between the optical element and a counter electrode in order to induce the migration of bio-molecules carrying surface charges. The effect of concentration and applied voltage is tested and the migration effect is shown to be reversible upon switching the electric field. The collected signal is of high quality and can be used to identify different bacterial genus through statistical spectral analysis. This technique therefore provides the ability to detect hazardous microorganisms with high specificity and high sensitivity in aqueous environments. This has great potential for online monitoring of water quality.

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“…7) Similarly, creep test consists in imposing a constant stress (σ 0) and monitoring the evolution of strain (ε(t)). From the ratio ε(t)/σ 0, the "creep modulus" J(t) can be calculated and a dimensionless function, called "creep function" φ(t) is defined by: (2) Product of Laplace-Carson transforms of relaxation and creep functions is equal to 1, so such kind of relation 7) can be deduced:…”

Section: Theoretical Background and Experimental Procedures 21 Theorementioning

confidence: 99%

Sub-Tg viscoelastic behaviour of chalcogenide glasses, anomalous viscous flow and stress relaxation

Guéguen

Sangleboeuf

Kéryvin

et al. 2008

J. Ceram. Soc. Japan

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Stress relaxation and viscous flow of GexSe1-x and TAS chalcogenide glasses were studied using the "bending method". Inadequacy of common models or functions to describe relaxation process of inorganic glasses were proved and the origin of an unexpected relaxation behaviour is discussed. Even if most part of the stress relaxes for short period (10 to 20 days), a significant part still remains (from 5 to 33%) after over one year. A linear viscoelastic behaviour has been demonstrated in the sense of an independence of the relaxation function to the stress level. However, the apparent viscosity seems to increase of almost one order of magnitude in only one month (from 5 10 15 to 3 10 16 Pa·s for TAS fibers) independently of strain or stress level, that is characteristic of glass structural changes.

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Advances in chalcogenide fiber evanescent wave biochemical sensing

Cited by 84 publications

References 68 publications

Enhancement of fluorescence-based sensing using microstructured optical fibres

Enhancement of fluorescence-based sensing using microstructured optical fibres

Opto-electrophoretic detection of bio-molecules using conducting chalcogenide glass sensors

Sub-Tg viscoelastic behaviour of chalcogenide glasses, anomalous viscous flow and stress relaxation

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