Improved diamond‐like carbon coating deposition uniformity on cylindrical sample by its suspension in RF PECVD chamber

Śmietana, Mateusz; Koba, Marcin; Mikulic, Predrag; Bogdanowicz, Robert; Bock, Wojtek J.

doi:10.1002/pssa.201532226

Cited by 9 publications

(3 citation statements)

References 21 publications

(35 reference statements)

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“…The effect is different for λ 1 and λ 2 due to different propagation conditions (effective refractive index) of the higher order cladding modes [26]. The cladding modes induced by asymmetrical nano-overlay experience different change in their effective refractive indices when external RI changes [29]. The external RI sensitivity is 105 to 378 and 29 to 183 nm/RIU for λ 1 and λ 2 in RI range 1.33-1.41 and 1.41-1.44 RIU, respectively.…”

Section: Resultsmentioning

confidence: 99%

Opto-Electrochemical Sensing Device Based on Long-Period Grating Coated with Boron-Doped Diamond Thin Film

Bogdanowicz¹,

Sobaszek²,

Ficek³

et al. 2015

Journal of the Optical Society of Korea

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The fabrication process of thin boron-doped nanocrystalline diamond (B-NCD) microelectrodes on fused silica single mode optical fiber cladding has been investigated. The B-NCD films were deposited on the fibers using Microwave Plasma Assisted Chemical Vapor Deposition (MW PA CVD) at glass substrate temperature of 475 ºC. We have obtained homogenous, continuous and polycrystalline surface morphology with high sp 3 content in B-NCD films and mean grain size in the range of 100-250 nm. The films deposited on the glass reference samples exhibit high refractive index (n=2.05 at λ=550 nm) and low extinction coefficient. Furthermore, cyclic voltammograms (CV) were recorded to determine the electrochemical window and reaction reversibility at the B-NCD fiber-based electrode. CV measurements in aqueous media consisting of 5 mM K3[Fe(CN)6] in 0.5 M Na2SO4 demonstrated a width of the electrochemical window up to 1.03 V and relatively fast kinetics expressed by a redox peak splitting below 500 mV. Moreover, thanks to high-n B-NCD overlay, the coated fibers can be also used for enhancing the sensitivity of long-period gratings (LPGs) induced in the fiber. The LPG is capable of measuring variations in refractive index of the surrounding liquid by tracing the shift in resonance appearing in the transmitted spectrum. Possible combined CV and LPG-based measurements are discussed in this work.

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Section: Resultsmentioning

confidence: 99%

Opto-Electrochemical Sensing Device Based on Long-Period Grating Coated with Boron-Doped Diamond Thin Film

Bogdanowicz¹,

Sobaszek²,

Ficek³

et al. 2015

Journal of the Optical Society of Korea

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“…In the case of NCD film, the overlay distribution around the fiber may not be uniform, thus the coupling of asymmetrical modes must be considered. We discussed the effect of the response to n ext in our previous work in which the LPGs were non-uniformly coated with diamond-like carbon overlays [42].…”

Section: Optical Propertiesmentioning

confidence: 99%

Linear antenna microwave chemical vapour deposition of diamond films on long-period fiber gratings for bio-sensing applications

Ficek¹,

Niedziałkowski²,

Śmietana³

et al. 2017

Opt. Mater. Express

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The growth processes of nanocrystalline diamond (NCD) thin films on fused silica optical fibers with UV-induced long-period gratings (LPGs) were investigated with regard to biosensing applications. The films were deposited using a linear antenna microwave plasma enhanced chemical vapor deposition system, which allows for the growth of diamond at temperatures below 350°C. The films exhibited a high refractive index n = 2.32, as estimated at λ = 550 nm. The biosensing applications of NCD-coated LPG were considered in relation to bovine serum albumin (BSA) as an external medium. In response to BSA binding and the subsequent formation of a thin bio-layer on the NCD surface, the LPG resonances slightly split and shifted towards lower wavelengths.

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“…The most important application of such diamond‐like nanostructures is surface coating, which can be used in various applications like biomedical (), nanostructure design (), protection of materials, and devices against environmental damage , to name a few. In addition, these structures can be obtained by simpler and cheaper techniques compared with diamond.…”

Section: Introductionmentioning

confidence: 99%

Equilibrium diamond‐like carbon nanostructures with cubic anisotropy: Elastic properties

Lisovenko

Baimova

Rysaeva

et al. 2016

Physica Status Solidi (b)

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Diamond‐like carbon nanostructures with cubic anisotropy made by joining fullerene‐like molecules of different types via valence bonds are studied by means of molecular dynamics simulations. The considered structures are interesting because they include both sp2‐ and sp3‐hybridized carbon atoms, which lead to their distinct properties compared to the structures with one type of hybridization. Seven diamond‐like carbon phases having different shapes of structural units and/or different ways of their connection are studied in the present work. For the relaxed equilibrium structures, the engineering elastic constants (Poisson's ratio, Young's modulus, and shear modulus) are calculated as the functions of the crystal orientation angles. Extreme values of the elastic constants are reported. It is shown that two of the considered diamond‐like structures have negative Poisson's ratio and can be regarded as the partial auxetics. According to the results of the present study, elastic properties of the bulk diamond‐like carbon structures can vary considerably depending on their structure. Diamond‐like carbon nanostructures

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Improved diamond‐like carbon coating deposition uniformity on cylindrical sample by its suspension in RF PECVD chamber

Cited by 9 publications

References 21 publications

Opto-Electrochemical Sensing Device Based on Long-Period Grating Coated with Boron-Doped Diamond Thin Film

Opto-Electrochemical Sensing Device Based on Long-Period Grating Coated with Boron-Doped Diamond Thin Film

Linear antenna microwave chemical vapour deposition of diamond films on long-period fiber gratings for bio-sensing applications

Equilibrium diamond‐like carbon nanostructures with cubic anisotropy: Elastic properties

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