Search

This chapter describes the Photodeposition from Colloid Solutions (PDCS) of nano-size. In the introduction, the basic photodeposition processes and their current technological trends are described. In section (2) the PDCS basics are given and in Section (3) the microscopic observations. In sections (4) and (5) the significant controlling PDCS parameters are discussed and related to the experimental kinetic investigations. Section (6) describes the currently suggested theory of PDCS process. [ABSTRACT FROM AUTHOR]

In this study, we show that supported gold nanoparticles with a given well-defined shape can be produced by laser-assisted growth on substrates based on different materials. [ABSTRACT FROM AUTHOR]

This work reviews the interaction of photons with polymers with an emphasis on UV laser ablation. Polymethylmethacrylate, polyimides and special designed polymers are used as examples to show that the mechanism is a mixture of photochemical and photothermal features which are closely related to the polymer structure and properties. Different approaches to probe the ablation mechanisms and to improve ablation are discussed. A critical evaluation of the experimental procedures and analysis techniques is presented. [ABSTRACT FROM AUTHOR]

The Canadian Institutes of Health Research (CIHR) has recently developed a major strategic initiative in the areas of regenerative medicine and nanomedicine. The present article presents a preliminary analysis of nanomedicine funding at CIHR (2000-2005), using a moderately stringent definition of nanomedicine. [ABSTRACT FROM AUTHOR]

To address some of the technological problems related to the proposed a novel approach based on the application of arrays of epitaxial quantum dots (eQD) that have been known for their applications in application of colloidal semiconductor nanocrystals for biosensing, we have advanced communication devices such as quantum dot lasers. [ABSTRACT FROM AUTHOR]

Three-dimensional (3D) micromachining of photosensitive glass is demonstrated by a photochemical reaction using femtosecond (fs) laser for lab-on-a-chip application. True 3D hollow microstructures embedded in the glass are fabricated by fs laser direct writing followed by heat treatment and successive wet etching. The modification mechanism of the photosensitive glass by the fs laser and advantage of this process are discussed. Various microcomponents for the lab-on-a-chip devices such as microfluidics, microvalves, microoptics, microlasers, etc. are fabricated by using this technique and their performance is examined. [ABSTRACT FROM AUTHOR]

A series of experimental results are presented that investigate the photoactivated changes in photostructurable glass ceramic materials. The results show that by selectively controlling the incident photon irradiance and wavelength, it is possible to have a controllable effect on the material properties after the exposed material has undergone a specific thermal processing protocol. We present the results of optical transmission spectroscopy, X-ray diffraction spectroscopy [ABSTRACT FROM AUTHOR]

The controlled synthesis of nanoparticles and nanotubes utilizing lasers is described with applications in multifunctional composites and biological nanovectors. Lasers offer unique advantages for the synthesis of novel nanomaterials such as single-walled carbon nanotubes and singlewalled carbon nanohorns, which form naturally within the laser vaporization plume under certain conditions. [ABSTRACT FROM AUTHOR]

advent of broadly tunable free-electron lasers with a combination of high irradiance, low-to-moderate pulse energy, high pulse repetition frequency and high average power has opened new opportunities in materials analysis, modification and processing. This paper describes several such areas, including laser surgery, infrared laser-assisted mass spectrometry, and resonant infrared pulsed laser deposition of polymer thin films. [ABSTRACT FROM AUTHOR]

This chapter presents an overview of the potential uses of nanoparticles in oncology. This includes the principles underlying the use of nanoparticles, firstly to enhance established treatment techniques such as radiation therapy, chemotherapy and surgery, as well as emerging treatment modalities, and secondly as contrast-enhancing agents to improve established tumor imaging methods, including X-ray, magnetic resonance, ultrasound and radionuclide techniques. In addition, photonic-based techniques will be emphasized, both therapeutic (photothermal, photomechanical and photodynamic therapies and fluorescence imageguided surgery) and diagnostic (fluorescence imaging, optoacoustic tomography and optical coherence tomography). [ABSTRACT FROM AUTHOR]

The Finite-Difference Time-Domain (FDTD) modeling technique is applied to study the effect of the cell membrane thickness in optical immersion enhanced phase contrast microscope imaging. The FDTD approach is also applied for studying the implementation of the optical immersion technique for the visualization of single and multiple gold nanoparticles in biological cells. [ABSTRACT FROM AUTHOR]

The optics of the surface plasmon resonance in the linear regime have been extensively studied and applied for almost a century. The explosive growth of interest in plasmonics, however, is focusing attention on novel plasmonic structures and nonlinear optical applications. [ABSTRACT FROM AUTHOR]

Nanobiophotonics is an emerging field created by the fusion of photonics, nanotechnology and biomedical science. It provides multidisciplinary opportunities for biological sensing, imaging, and new form of optical diagnostics as well as light guided and activated therapies. [ABSTRACT FROM AUTHOR]

Numerical solutions of the time-dependent Schrödinger equation for a 1D model non-Born-Oppenheimer 2+H are used to illustrate the nonlinear nonperturbative response of molecules to intense [ABSTRACT FROM AUTHOR]

The use of lasers in to modify and characterize materials is an increasingly attractive choice for high technology manufacturing as well as analytical and medical applications. As we push for more demanding tasks and for smaller dimensions, an understanding of the underlying physical and chemical aspects of problems becomes important. Here we discuss some of these issues relevant to most applications involving laser materials interactions. [ABSTRACT FROM AUTHOR]