Abstract

Understanding the growth dynamics and transport mechanism of nanoparticles/nanobubbles in a solution is an important issue in nanoscience and nanotechnology. Using a standard CMOS camera and a nanosecond laser at 532 nm, we demonstrate the far-field detection of polystyrene nanoparticles in bulk water. Conveniently, the sizes of individual nanoparticles are found to be reliably estimated from the brightness of scattering signals under the single laser pulses. Since the scattering efficiency of polystyrene nanoparticles is similar to that of nanobubbles, our results imply that the detection of nanobubbles in bulk solution is also possible.

© 2020 Optical Society of America

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