No (412)
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412
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Fabrication methods of diamond coated Love wave SAW biosensors for bacterial detection applications
Drbohlavová, L.; Bulíř, J.; Valeš, Václav; Jákl Křečmarová, M.; Taylor, Andrew; Talbi, A.; Soltani, A.; Mortet, Vincent
2015 - English
Pathogen detection has a huge importance in the food industry and it can play significant role in the medical practice. This paper focus on the fabrication methods of diamond coated Love wave surface acoustic wave (LW-SAW) biosensors for bacteria detection. LW-SAW sensors have been fabricated on AT-quartz crystals. Interdigitated transducers have been patterned by RF sputtering and photolithography techniques. Amorphous silicon oxide (SiO2) guiding layer and nano-crystalline diamond layer were both deposited by plasma enhanced chemical vapor deposition at low temperature. Preliminary experimental study of diamond surface termination for sensors bio-functionalization is also reported.
Keywords:
biosensors; LW-SAW
Available at various institutes of the ASCR
Fabrication methods of diamond coated Love wave SAW biosensors for bacterial detection applications
Pathogen detection has a huge importance in the food industry and it can play significant role in the medical practice. This paper focus on the fabrication methods of diamond coated Love wave surface ...
Influence of incorporated nanodiamond particles on mechanical properties of composite material based on multi-layer PVA nanofiber textiles
Prošek, Zdeněk; Indrová, K.; Rácová, Z.; Ryparová, Pavla; Nežerka, V.; Topič, J.; Tesárek, Pavel; Kromka, Alexander
2015 - English
The present study investigates the influence of NDP on mechanical properties of multi-layer PVA nanofiber textiles. The particles of a diameter equal to 5 nm were incorporated into double- and triple-layer textiles, while the single-layer samples were prepared as the reference. The diameter of PVA nanofibers varied from 100 to 300 nm. We characterized the tensile strength, stiffness and ductility of fabricated nanofibers by using a conventional method – a tensile test. We found that the NDP-enriched nanofibers reveal antibacterial character. However, none or negligible influence of NDP additions on the tested mechanical properties was observed.
Keywords:
nanofibers; PVA; nanodiamonds; electrospinning; mechanical properties; SEM
Available at various institutes of the ASCR
Influence of incorporated nanodiamond particles on mechanical properties of composite material based on multi-layer PVA nanofiber textiles
The present study investigates the influence of NDP on mechanical properties of multi-layer PVA nanofiber textiles. The particles of a diameter equal to 5 nm were incorporated into double- and ...
Fabrication of 3D diamond membranes for microfluidic systems
Varga, Marián; Babchenko, Oleg; Bauerová, Pavla; Hruška, Karel; Jurka, Vlastimil; Kromka, Alexander; Rezek, Bohuslav
2015 - English
Perfusion of cell medium, especially in microfluidic devices, can provide in-vivo-like conditions for cell cultures. The most recent demand on such systems is to include electronically active artificial cell support for in-situ monitoring. Diamond thin films exhibit advantageous combination of physical, mechanical, chemical, biocompatible and electronic properties for this purpose. In this work we explore two strategies for fabrication of self-standing three-dimensional nanocrystalline diamond membrane for implementation in microfluidic invivo like experiments: i) nucleation and chemical vapour deposition (CVD) growth of diamond on porous 3D carbon foam (with 80 pores per inch) and ii) selective diamond growth predefined by photolithographic processing using copper grid mask. The morphology and material quality of the fabricated membranes are characterized by scanning electron microscopy and Raman spectroscopy.
Keywords:
nanocrystalline diamond; membranes; microwave plasma; microfluidics; carbon foam
Available at various institutes of the ASCR
Fabrication of 3D diamond membranes for microfluidic systems
Perfusion of cell medium, especially in microfluidic devices, can provide in-vivo-like conditions for cell cultures. The most recent demand on such systems is to include electronically active ...
(100) substrate processing optimization for fabrication of smooth boron doped epitaxial diamond layer by PE CVD
Mortet, Vincent; Fekete, Ladislav; Ashcheulov, Petr; Taylor, Andrew; Hubík, Pavel; Trémouilles, D.; Bedel-Pereira, E.
2015 - English
Boron doped diamond layers were grown in an SEKI AX5010 microwave plasma enhanced chemical vapour deposition system. Effect of surface preparation, i.e. polishing and O2/H2 plasma etching on epitaxial growth on type Ib (100) HPHT synthetic diamonds were investigated. Using optimized substrate preparation, smooth (RRMS ~ 1 nm) boron doped diamond layers with metallic conduction and free of un-epitaxial crystallites were grown with a relatively high growth rate of 3.7 μm/h. Diamond were characterized by optical microscopy, optical profilometry, atomic force microscopy and Hall effect.
Keywords:
doping; PE CVD; diamond; surface treatment; thin film
Available at various institutes of the ASCR
(100) substrate processing optimization for fabrication of smooth boron doped epitaxial diamond layer by PE CVD
Boron doped diamond layers were grown in an SEKI AX5010 microwave plasma enhanced chemical vapour deposition system. Effect of surface preparation, i.e. polishing and O2/H2 plasma etching on epitaxial ...
Mitsubishi Heavy Industries Aero Engines, Ltd. – Feasibility test of short pulse laser drilling on metal alloy plate
Miura, Taisuke
2015 - English
We have constructed a laser drilling station for metal plates supplied by MHIAEL. We have succeeded to demonstrate the fast drilling on the metal plates within 0.1sec using our thin disk regenerative amplifier. This result leaded to the additional contract with the guest on February 2016.
Keywords:
short pulse laser; drilling; metal alloy
Available at various institutes of the ASCR
Mitsubishi Heavy Industries Aero Engines, Ltd. – Feasibility test of short pulse laser drilling on metal alloy plate
We have constructed a laser drilling station for metal plates supplied by MHIAEL. We have succeeded to demonstrate the fast drilling on the metal plates within 0.1sec using our thin disk regenerative ...
Utsunomiya University – Prototyping of pump laser optics for compact thin disk head
Miura, Taisuke
2015 - English
We have constructed a compact thin disk head designed by HiLASE. We demonstrated the CW output from the thin disk head with the efficiency of higher than 30% and the good beam quality. This result leaded to the additional contract with Utsunomiya University on February 2016.
Keywords:
pump laser; optics; compact thin disk head
Available at various institutes of the ASCR
Utsunomiya University – Prototyping of pump laser optics for compact thin disk head
We have constructed a compact thin disk head designed by HiLASE. We demonstrated the CW output from the thin disk head with the efficiency of higher than 30% and the good beam quality. This result ...
MEDICEM Institute, spol. s.r.o. - Technology to shape hydrogels by lasers
Rostohar, Danijela; Flimelová, Miroslava
2015 - English
We have prepared study with aim to propose a technology allowing to shape hydrogels by lasers and to describe a project (including timelines, milestones, team and budget) that would lead to the development of such technology, including supportive scientific, technical and theoretical information.
Keywords:
hydrogels; lasers; intraocular implants; intraocular lenses
Available at various institutes of the ASCR
MEDICEM Institute, spol. s.r.o. - Technology to shape hydrogels by lasers
We have prepared study with aim to propose a technology allowing to shape hydrogels by lasers and to describe a project (including timelines, milestones, team and budget) that would lead to the ...
Thermocouples
Kopeček, Jaromír
2015 - English
Analsis of different samples of thermocouples before and after laser marking what is used to produce barcode close to spike of the probes. The aim is to investigate the influence of laser marking by detailed analysis of the material structure of the samples.
Keywords:
laser marking; thermocouple; analysis; inconel
Available at various institutes of the ASCR
Thermocouples
Analsis of different samples of thermocouples before and after laser marking what is used to produce barcode close to spike of the probes. The aim is to investigate the influence of laser marking by ...
Doped DLC coatings for biomedical applications
Písařík, Petr
2015 - English
Nowadays there are materials having excellent properties for use in medicine (Diamond-like carbon, Hydroxyapatite, …). Diamond-like carbon (DLC) is a metastable form of amorphous carbon containing bonded carbon atoms of sp2 and sp3 hybridized orbital. DLC layers are semiconductors with high mechanical hardness, chemical inertness, low coefficient of friction, high thermal conductivity, good electrical and optical properties, biocompatibility and no cytotoxicity. All properties of the films are not always ideal, so it is necessary to modify the layer. One example of how to modify the properties of thin layers are dopations. The incorporation of dopants in films may lead to greater multifunctionality and much improved properties. Most modifications were made to modify contact angle and surface energy, to reduce internal stresses, to decrease surface roughness, coefficient of friction or wear....
Keywords:
silver doped; diamond like carbon; thin layers; mechanical properties
Available at various institutes of the ASCR
Doped DLC coatings for biomedical applications
Nowadays there are materials having excellent properties for use in medicine (Diamond-like carbon, Hydroxyapatite, …). Diamond-like carbon (DLC) is a metastable form of amorphous carbon containing ...
Initial study of structure of nanofiber textiles and the creation of its model
Havrlík, M.; Sveshnikov, Alexey
2015 - English
In this research, the structure of the fabrics was analyzed using an electron scanning microscope Tescan Maia 3. Two sets of the experiments have been carried out. In the first experiment the surface structure of the samples was studied. Photos created by SEM were analyzed using program Atlas and image editor GIMP. In this set of the experiments the initial parameters for the creation of a digital 2D model of a single layer have been determined (fiber size distribution, pore size and curvature of the fibers). In the second set of the experiments cross sections of nanofiber textiles were made in order to study the inner structure of the fabric. This information allows evaluation of the total number of 2D layers in the model and, thus, is very important for future creation of a 3D model of the fabric.
Keywords:
polymer; SEM photography
Available at various institutes of the ASCR
Initial study of structure of nanofiber textiles and the creation of its model
In this research, the structure of the fabrics was analyzed using an electron scanning microscope Tescan Maia 3. Two sets of the experiments have been carried out. In the first experiment the surface ...
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