Search results for laser

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Optical control of nanoparticles on solid substrates
Background Colloidal particles are becoming an increasingly prevalent feature in many emerging technologies. The ability to control these particles and construct them into desired nanostructures for functional devices is necessary to realize their benefits in real-world applications. Many existing technologies to control colloidal particles function...
Damage detection of railway tracks based on vibration measurements by moving laser sensors
BackgroundRailway transportation plays a key role in mass transportation of products and passengers. One of the biggest problems that endanger safety and operation of railways is the fractural cracks of the railway tracks. Even though ultrasonic measurement techniques have been extensively used for detection of such defects, these methods may show inefficiencies....