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Characterization of Femtosecond Laser Ablation ...
58,99 € *
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Characterization of Femtosecond Laser Ablation and Deposition ab 58.99 € als Taschenbuch: Characterization of Femtosecond Laser Ablation and Deposition by Use of Spectral Interferometry. Aus dem Bereich: Bücher, Wissenschaft, Technik,

Anbieter: hugendubel
Stand: 20.10.2020
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OPTO-INJECTION INTO SINGLE LIVING CELLS BY FEMT...
49,00 € *
ggf. zzgl. Versand

This dissertation presents a novel technique ofdelivering membrane impermeable molecules into singleliving cells with the assistance of femtosecond (fs)near-infrared (NIR) laser pulses. This techniquepromises several major advantages, namely, very hightransfection efficiency, high cell survival rate( 100%) and fully preserved cell viabilities. In this work, the system for fs NIR opto-injectionwas designed and built. Successful fs NIRopto-injection has been performed on several cellsystems including single mammalian cells, marineanimal eggs, and human cancer cells cultured in atissue-like environment. The connections betweenlaser parameters and cell responses were explored.Dye uptake rate of the target cells was observed todepend on incident laser intensity. Pore size wasfound dependent on incident laser intensity. Theconclusion was made that laser-induced breakdown andplasma-induced ablation in cell membrane are thephysical principles that govern the process of fs NIRopto-injection.

Anbieter: Dodax
Stand: 20.10.2020
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Characterization of Femtosecond Laser Ablation ...
59,00 € *
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A novel femtosecond micromachining workstation that permits real-time measurement of ablation depth and transient reflectivity is demonstrated. This instrumentation is used to characterize two processes: micromachining of thin metal films, and laser induced forward transfer (LIFT). Spectral interferometry was incorporated in a femtosecond micromachining system to enable real-time visualization of micromachined features as they are written into thin metal films-low energy(pJ) femtosecond oscillator pulses are used to probe the sample as it is cut by high energy (uJ) pulses. Sub-wavelength depths are readily resolved using this technique, making it possible to monitor the integrity of micromachined structures as they are created. This technique can also be employed to characterize interesting processes such as laser induced forward transfer (LIFT) of thin metal films. LIFT essentially involves using a pulsed laser to pattern a structure by deposition as opposed to ablation. Using modest numerical apertures (0.65 or less) we have been able to produce submicron features using this method of femtosecond pulsed laser deposition.

Anbieter: Dodax
Stand: 20.10.2020
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The 8th International Conference on Laser Appli...
148,53 € *
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These proceedings will be of interest to scientists and researchers dealing with laser applications generally, and those in the fields of both environmental applications of lasers and biomedical applications of lasers.  Additionally, these proceedings will be of interest to ophthalmologists and  dermatologists. This conference was focusing on the environmental and biomedical applications of lasers. Among the environmental applications subjects such as laser cleaning of archaeological objects, preparation of nanoparticles for environmental tasks, and follow up of phytoremediation adopting laser spectrochemical analytical techniques have been presented. Biomedically authors dealt with photodynamic therapy (PDT), Femtosecond and Picosecond Laser Ablation of Intraocular Lenses, low intensity laser therapy (LILT) in physiotherapy, exploiting laser fluorescence for diagnosis.

Anbieter: Dodax
Stand: 20.10.2020
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Femtosekundenlaserbearbeitung tetragonalen Zirc...
26,90 CHF *
zzgl. 3,50 CHF Versand

Tetragonales Zirconiumdioxid wird aufgrund seiner Biokompatibilität und mechanischen Eigenschaften für Implantate verwendet, die starken Beanspruchungen ausgesetzt sind. Alle konventionellen Bearbeitungsverfahren, auch unter Verwendung von Lasern bis in den Nanosekundenbereich, gehen jedoch mit Qualitätseinbussen am Endprodukt einher. Femtosekundenlaser dagegen ermöglichen einen präzisen schädigungsarmen Materialabtrag. Die Produktivität des Verfahrens wird an drei Anwendungsfeldern untersucht: der Mikrostrukturierung von Oberflächen, dem Ausschneiden von Materialblöcken sowie der Erzeugung von Nanopartikeln in Flüssigkeiten. Für jeden dieser Bereiche werden optimale Prozessbedingungen und Bearbeitungsparameter bestimmt. Erstmals demonstrieren und untersucht wird unter anderem die Erzeugung stabiler Zirconiumdioxidnanopartikeln durch Femtosekundenlaserabtrag in Flüssigkeiten. Anwendungsschwerpunkt der untersuchten Verfahren ist die Mikrostukturierung der Innenfläche von Zahnkronen: Durch lasererzeugten Gräben wird die Verklebung zwischen Probekörpern und einem Dentalbefestigungszement nachweislich verbessert. Due to ist biocompatibility and mechanical properties, tetragonal zirconia is used for implants that are subject to strong operational demands. However, all conventional machining tools, including lasers with pulse durations down to the nanosecond regime, cause quality losses of the final product. Femosecond lasers allow to process material precisely and with low damage. The productivity is investigated at three application fields: microstructuring of surfaces, cutting removal of material blocks, and generation of nanoparticles in liquids. For each of these fields, optimal processing conditions and parameters are determined. The generation of stable zirconia nanoparticles by femtosecond laser ablation in liquids is demonstrated and investigated for the first time. Main applicational focus of the processes is the micorstucturing of dental crowns at the inner surface: by means of laser-ablated trenches, the bonding between zirconia samples and dental adhesive cements is demonstrably improved.

Anbieter: Orell Fuessli CH
Stand: 20.10.2020
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Opto-Injection Into Single Living Cells Byfemto...
82,90 CHF *
ggf. zzgl. Versand

This dissertation presents a novel technique of delivering membrane impermeable molecules into single living cells with the assistance of femtosecond (fs) near-infrared (NIR) laser pulses. This technique promises several major advantages, namely, very high transfection efficiency, high cell survival rate (~100%) and fully preserved cell viabilities. In this work, the system for fs NIR opto-injection was designed and built. Successful fs NIR opto-injection has been performed on several cell systems including single mammalian cells, marine animal eggs, and human cancer cells cultured in a tissue-like environment. The connections between laser parameters and cell responses were explored. Dye uptake rate of the target cells was observed to depend on incident laser intensity. Pore size was found dependent on incident laser intensity. The conclusion was made that laser-induced breakdown and plasma-induced ablation in cell membrane are the physical principles that govern the process of fs NIR opto-injection.

Anbieter: Orell Fuessli CH
Stand: 20.10.2020
Zum Angebot
Femtosekundenlaserbearbeitung tetragonalen Zirc...
22,99 € *
ggf. zzgl. Versand

Tetragonales Zirconiumdioxid wird aufgrund seiner Biokompatibilität und mechanischen Eigenschaften für Implantate verwendet, die starken Beanspruchungen ausgesetzt sind. Alle konventionellen Bearbeitungsverfahren, auch unter Verwendung von Lasern bis in den Nanosekundenbereich, gehen jedoch mit Qualitätseinbußen am Endprodukt einher. Femtosekundenlaser dagegen ermöglichen einen präzisen schädigungsarmen Materialabtrag. Die Produktivität des Verfahrens wird an drei Anwendungsfeldern untersucht: der Mikrostrukturierung von Oberflächen, dem Ausschneiden von Materialblöcken sowie der Erzeugung von Nanopartikeln in Flüssigkeiten. Für jeden dieser Bereiche werden optimale Prozessbedingungen und Bearbeitungsparameter bestimmt. Erstmals demonstrieren und untersucht wird unter anderem die Erzeugung stabiler Zirconiumdioxidnanopartikeln durch Femtosekundenlaserabtrag in Flüssigkeiten. Anwendungsschwerpunkt der untersuchten Verfahren ist die Mikrostukturierung der Innenfläche von Zahnkronen: Durch lasererzeugten Gräben wird die Verklebung zwischen Probekörpern und einem Dentalbefestigungszement nachweislich verbessert. Due to ist biocompatibility and mechanical properties, tetragonal zirconia is used for implants that are subject to strong operational demands. However, all conventional machining tools, including lasers with pulse durations down to the nanosecond regime, cause quality losses of the final product. Femosecond lasers allow to process material precisely and with low damage. The productivity is investigated at three application fields: microstructuring of surfaces, cutting removal of material blocks, and generation of nanoparticles in liquids. For each of these fields, optimal processing conditions and parameters are determined. The generation of stable zirconia nanoparticles by femtosecond laser ablation in liquids is demonstrated and investigated for the first time. Main applicational focus of the processes is the micorstucturing of dental crowns at the inner surface: by means of laser-ablated trenches, the bonding between zirconia samples and dental adhesive cements is demonstrably improved.

Anbieter: Thalia AT
Stand: 20.10.2020
Zum Angebot
Opto-Injection Into Single Living Cells Byfemto...
62,99 € *
ggf. zzgl. Versand

This dissertation presents a novel technique of delivering membrane impermeable molecules into single living cells with the assistance of femtosecond (fs) near-infrared (NIR) laser pulses. This technique promises several major advantages, namely, very high transfection efficiency, high cell survival rate (~100%) and fully preserved cell viabilities. In this work, the system for fs NIR opto-injection was designed and built. Successful fs NIR opto-injection has been performed on several cell systems including single mammalian cells, marine animal eggs, and human cancer cells cultured in a tissue-like environment. The connections between laser parameters and cell responses were explored. Dye uptake rate of the target cells was observed to depend on incident laser intensity. Pore size was found dependent on incident laser intensity. The conclusion was made that laser-induced breakdown and plasma-induced ablation in cell membrane are the physical principles that govern the process of fs NIR opto-injection.

Anbieter: Thalia AT
Stand: 20.10.2020
Zum Angebot