Related Experiment Video
Updated: Jul 10, 2026

Quantitative Locomotion Study of Freely Swimming Micro-organisms Using Laser Diffraction
Published on: October 25, 2012
Luminescent colloidal silicon suspensions from porous silicon
Abstract:
A procedure for generating colloidal suspensions of Si that exhibit luminescence, attributed to quantum confinement effects, is described. Samples of n- or p-type Si that have been electrochemically etched to form porous Si can be ultrasonically dispersed into methylene chloride, acetonitrile, methanol, toluene, or water solvents, forming a suspension of fine Si particles that luminesce. Transmission electron microscopy analyses show that the Si particles have irregular shapes, with diameters ranging from many micrometers to nanometers. Luminescent, composite polystyrene/Si films can be made by the addition of polystyrene to a toluene suspension of the Si nanoparticles and casting of the resulting solution onto a glass slide.
Related Concept Videos
Buoyancy
To get...
Total Internal Reflection Fluorescence Microscopy
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Photoluminescence: Applications
Buoyancy and Stability for Submerged and Floating Bodies
Diversity of Protists II

