Surface functionalisation of TiO2 evanescent waveguide sensor for E.coli monitoring

2012 ◽  
Author(s):  
A. Purniawan ◽  
G. Pandraud ◽  
K. A. Vakalopoulos ◽  
P. J. French ◽  
P. M. Sarro
Keyword(s):  
Surface Functionalisation ◽  
Evanescent Waveguide ◽  
Waveguide Sensor

scholarly journals NONLINEAR OPTICAL WAVEGUIDE STRUCTURE FOR SENSOR APPLICATION: TM CASE

2007 ◽  
Vol 21 (30) ◽  
pp. 5075-5089 ◽  
Author(s):  
HALA M. KHALIL ◽  
MOHAMMED M. SHABAT ◽  
SOFYAN A. TAYA ◽  
MAZEN M. ABADLA
Keyword(s):  
Refractive Index ◽  
Theoretical Analysis ◽  
Closed Form ◽  
Optical Waveguide ◽  
Effective Refractive Index ◽  
Nonlinear Optical ◽  
Waveguide Structure ◽  
Analytical Expressions ◽  
Evanescent Waveguide ◽  
Waveguide Sensor

In this work, we present an extensive theoretical analysis of nonlinear optical waveguide sensor. The waveguide under consideration consists of a thin dielectrica film surrounded by a self-focused nonlinear cladding and a linear substrate. The nonlinearity of the cladding is considered to be of Kerr-type. Both cases, when the effective refractive index is greater and when it is smaller than the index of the guiding layer, are discussed. The sensitivity of the effective refractive index to any change in the cladding index in evanescent optical waveguide sensor is derived for TM modes. Closed form analytical expressions and normalized charts are given to provide the conditions required for the sensor to exhibit its maximum sensitivity. The results are compared with those of the well-known linear evanescent waveguide sensors.

scholarly journals Evanescent Waveguide Sensor for On-Chip Biomolecular Detection

Proceedings ◽  
2017 ◽  
Vol 1 (4) ◽  
pp. 562
Author(s):  
Giampiero de Cesare ◽  
Rita Asquini ◽  
Alessio Buzzin ◽  
Domenico Caputo
Keyword(s):  
Biomolecular Detection ◽  
On Chip ◽  
Evanescent Waveguide ◽  
Waveguide Sensor

Fabrication and optical measurements of a TiO2-ALD evanescent waveguide sensor

2012 ◽  
Vol 188 ◽  
pp. 127-132 ◽  
Author(s):  
A. Purniawan ◽  
G. Pandraud ◽  
T.S.Y. Moh ◽  
A. Marthen ◽  
K.A. Vakalopoulos ◽  
...  
Keyword(s):  
Optical Measurements ◽  
Evanescent Waveguide ◽  
Waveguide Sensor

scholarly journals Bioactive Plasma Coatings on Orthodontic Brackets: In Vitro Metal Ion Release and Cytotoxicity

Coatings ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 857
Author(s):  
Lasni Samalka Kumarasinghe ◽  
Neethu Ninan ◽  
Panthihage Ruvini Lakshika Dabare ◽  
Alex Cavallaro ◽  
Esma J. Doğramacı ◽  
...  
Keyword(s):  
Metal Ion ◽  
Prolonged Exposure ◽  
Orthodontic Brackets ◽  
Plasma Polymer ◽  
Functional Coatings ◽  
Key Factors ◽  
Ion Release ◽  
Metal Ion Release ◽  
Surface Functionalisation

The metal ion release characteristics and biocompatibility of meta-based materials are key factors that influence their use in orthodontics. Although stainless steel-based alloys have gained much interest and use due to their mechanical properties and cost, they are prone to localised attack after prolonged exposure to the hostile oral environment. Metal ions may induce cellular toxicity at high dosages. To circumvent these issues, orthodontic brackets were coated with a functional nano-thin layer of plasma polymer and further immobilised with enantiomers of tryptophan. Analysis of the physicochemical properties confirmed the presence of functional coatings on the surface of the brackets. The quantification of metal ion release using mass spectrometry proved that plasma functionalisation could minimise metal ion release from orthodontic brackets. Furthermore, the biocompatibility of the brackets has been improved after functionalisation. These findings demonstrate that plasma polymer facilitated surface functionalisation of orthodontic brackets is a promising approach to reducing metal toxicity without impacting their bulk properties.

A sustainable way for surface functionalisation of PET nonwoven with novel chitosan-cinnamaldehyde cross-linked nanoparticles

2021 ◽  
Author(s):  
Rahul R. Gadkari ◽  
Ashutosh Gupta ◽  
Uddesh Teke ◽  
Atul Awadhiya ◽  
Mohammad Shahadat ◽  
...  
Keyword(s):  
Surface Functionalisation

Quasi-linear response of an integrated optical waveguide sensor by a double output readout method

Optik ◽  
2021 ◽  
pp. 167734
Author(s):  
Hongru Zhang ◽  
Guofang Fan ◽  
Xiaoyu Cai ◽  
Jiasi Wei ◽  
Gaoshan Jing ◽  
...  
Keyword(s):  
Optical Waveguide ◽  
Linear Response ◽  
Integrated Optical ◽  
Integrated Optical Waveguide ◽  
Waveguide Sensor
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