Erscheinungsdatum: 21.12.2016, Medium: Buch, Einband: Gebunden, Titel: Applications of Laser Ablation, Titelzusatz: Thin Film Deposition, Nanomaterial Synthesis and Surface Modification, Redaktion: Yang, Dongfang, Verlag: IntechOpen, Sprache: Englisch, Rubrik: Elektronik // Elektrotechnik, Nachrichtentechnik, Seiten: 428, Informationen: HC gerader Rücken kaschiert, Gewicht: 1128 gr, Verkäufer: averdo
Characterization of Femtosecond Laser Ablation and Deposition ab 59 € als Taschenbuch: Characterization of Femtosecond Laser Ablation and Deposition by Use of Spectral Interferometry. Aus dem Bereich: Bücher, Wissenschaft, Technik,
Characterization of Femtosecond Laser Ablation and Deposition ab 59 EURO Characterization of Femtosecond Laser Ablation and Deposition by Use of Spectral Interferometry
Over the past few years, the Pulsed Laser Deposition (PLD) technique has emerged as one of the simplest and most versatile methods for the deposition of thin films of a wide variety of materials. The stoichiometric removals of constituent species from the target during the ablation, as well as the relatively small no of control parameters, are two major advantages of PLD over some of the other physical deposition techniques. Magnetic materials encompass a wide variety of materials, which are used in a diverse range of applications. They are used for the storage of data on audio and video tape as well as on computer disks. In the field of medicine, they are used in body scanners. The single crystal like thin films of Barrium hexaferrite (BaFe12O19) were deposited on sapphire (Al2O3) substrate using Pulse Laser Deposition technique. The effect of external magnetic field on the film deposition was investigated. Crystallographic orientation andtexture were determined using X-Ray diffractometer. Diffuse reflectance spectra, absorption edge and band gap energy were determined by spectrometer. Magnetic parameters (coercivity and remanance) were deduced from Vibrating Sample Magnetometer.
Production of carbon nanomaterials particularly CNTs with good quality and high yield is a challenging task. Various methods used for the production of CNTs include laser ablation, arc discharge method and catalytic chemical vapor deposition (CCVD). CCVD method is the well-recognized method for a large-scale production of CNTs but this requires optimization of various parameters such as reactor size, catalyst amount, gas flow rates, time of reaction, etc. to multiply yield of CNTs. The present work aimed at developing a simple CCVD setup for the production of CNTs with high yield. A product of CCVD experiments was dispersed in an epoxy resin to produce corrosion protection coatings for stainless steels.
This dissertation, through a systematic investigation of the behavior of the gas-phase dynamics ofnanoparticles generated by laser ablation of solid target materials in background gasesand a study of the physical processes involved in gas-phase nanoparticle processing, explores the combination of laser and aerosol processes as a novel approach to make thinfilm materials with a level of microscopic organization similar to that found in nature.The integrated laser-aerosol method is very flexible and can be used in thesynthesis of a variety of materials. In this study it is applied to the deposition ofnanocomposite thin films comprising tetrahedral amorphous carbon (ta-C) withembedded metal nanoparticles. The controlled incorporation of metal nanoparticlesenables the modulation of the electrical conductivity of ta-C over four orders ofmagnitude without significantly or adversely affecting its mechanical properties.
In this work multi-application, multi-walled carbon nanotubes (MWCNTs) as super MR contrast agents and Near-Infared Radiation (NIR) laser absorbers are combined with Proton Resonance Frequency (PRF) based Magnetic Resonance Temperature Imaging (MRTI) to improve the safety and efficacy of Laser Induced Thermal Therapy (LITT). Instilled MWCNTs enable precise tumor localization and killing of the tumor through preferential high temperature while protecting surrounding healthy tissue by monitoring the 3D temperature distribution. As advanced MR contrast agents (CA), Fe-containing MWCNTs produced by chemical vapor deposition (CVD) with 600mg Ferrocene, show up to 5 times greater efficiency in changing T2 relaxation properties compared to the clinical MR CA, Feridex. Thus, MWCNTs could be used potentially as a super heating generator and contrast agents in thermal ablation therapy.