ResourceGeneral Lab
Size Determination & Visualization of Wear Debris from Orthopedic Implants
29 May 2012This note presents a technique which looks at the light scattered from individual nanoparticles as they move under Brownian motion in the path of a laser beam. The speed at which the particles move is related to particle size, temperature and solvent viscosity. With knowledge of the temperature and solvent viscosity, particle size can be directly calculated. A case study involving orthopedic implants is described.
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NanotechnologyNanotechnology, or nanotech, is an engineering technique using molecular scale functional systems. Applications of nanotechnology include medicine and medical devices, electronics, air and water purification, food science and energy production.Particle CharacterizationParticle characterization instruments are used to determine particle size distribution, shape, surface area, zeta potential, density and porosity of particles and materials. Multiple tecchniques are available for determining particle size, shape and count including dynamic light scattering (DLS), laser diffraction, electrozone (Coulter technique), imaging particle analysis and single particle optical sensing. Determine the density of your material with a gas pycnometer or examine its surface area and porosity with gas adsorption analyzers and mercury porosimeters. Find the best particle characterization instruments in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Light MicroscopyLight microscopes or optical microscopes are used to visualize microscale objects under magnification, including cells, clinical specimens and materials. Lab equipment for light microscopy includes confocal microscopes, fluorescence microscopes, zoom and stereo microscopes. Microscope slides and imaging reagents are available for visualizing samples, as well as various microscope stages and incubators for large or temperature-sensitive samples. Find the best light microscopes in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Electron MicroscopyElectron microscopes (EM) are used to create high-resolution images of samples at the nanoscale by means of an accelerated beam of electrons as a source of illumination. Types of electron microscope include scanning electron microscopes (SEM), transmission electron microscopes (TEM), scanning transmission electron microscopes (STEM) and cryo-electron microscopes. Focused ion beam (FIB) microscopes are useful for modifying or milling a sample surface with nanometer precision, as well as imaging. Find the best electron microscopes in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Wear DebrisOrthopedic Implants