Acorn™, a New, Simple, Inexpensive Method for Non-Invasive Particle Size Measurement of Suspensions and Droplets
H.S. Dhadwal, B. Mukherjee, D. Fairhurst and S.W. Race
Dynamic Cosmetics Inc., US
particle size, suspensions, droplets
Nanoscale particle sizing of colloidal suspensions can be performed with Acorn,™ a new, patented handheld device, that combines remote delivery and detection of laser light, and a direct measurement of particle size, without the use of digital correlators. The former is achieved through a singlemode backscatter fiber optic probe, while the latter is made possible through the implementation of a statistical processing algorithm, which recovers the average particle diameter from the integration time dependent coherence of the scattered intensity. Real-time measurement of the factorial moments, or the coherence of the scattered intensity, is made with a field programmable gate array. A fiber optic backscatter probe permits remote interrogation of samples either by dipping the probe into the solution or by placing the probe outside the container. Acorn™ provides a rapid measurement of the average diameter in the range of 2 to 5000 nm over a broad range of concentrations.
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Nanotech 2005 Conference Program Abstract