Chemical sensor made from a porous Si photonic crystal connected to a cell phone (12 Mb)
MPEG-4 movie showing a photonic crystal sensor that has been integrated with electronics (Ardueno board) that is then connected to a cell phone. Exposure to chemical vapor trips the sensor, and this information is then transmitted to a remote receiver via a commercial cell phone network. Sensor made and filmed by Brian H. King.
Synthesis of porous Si particles (7 Mb)
APPLE QUICKTIME movie showing synthesis of porous Si particles and some lab shots showing their characterization. Movie finishes with a zoom into the 30-nm pores of a porous Si microparticle (courtesy Jennifer Andrew). Filmed by Luo Gu, with help from the other lab members.
Lab shots of nanoworms, magnetic porous Si particles (36 Mb)
MPEG-4 movie showing various lab members synthesizing and characterizing some of the nanomaterials we work with in our lab. Movie finishes with a close-up of Ji-Ho Park with a syringe filled with his tumor-targeting nanoworms. Filmed by Luo Gu, with a lot of help from the other lab members.
Manipulation of liquids using magnetic Smart Dust chaperones (2.4 Mb)
Quicktime movie showing magnetized Smart Dust assembled onto four water drops. Two of the drops are merged, then the other two. A drop of water containing an indicator dye is then brought into the first merged set using some free chaperones. The final frame shows the blue color of the indicator dye in the top drop after reaction. Each of the individual smart dust particles shown is about the size of the diameter of a human hair (50-100 microns), and the original 4 drops are each approximately 4 mm in diameter. Filmed by Jason R. Dorvee.
Smart Dust assembling on a drop of oil (9 Mb)
Quicktime movie showing smart dust in a small flask. A drop of an oily pollutant (methylene chloride) is added and the clip then zooms in on a microscope image of the smart dust assembling itself at the oil/water interface. Each of the individual smart dust particles shown is about the size of the diameter of a human hair (50-100 microns). High resolution version of Smart Dust assembling on a drop of oil (92 Mb) Filmed by Jamie R. Link.
Etching porous Si (2.1 Mb)
Quicktime movie showing the electrochemical preparation of a porous Si sample. Filmed by Prof. Jun Gao.
Detection of acetone with a porous Si photonic crystal (3.7 Mb)
A Quicktime movie showing a porous Si Bragg stack being dosed (2x) with acetone in a vacuum chamber. Filmed by Dr. Ting Gao.
Smart dust in water (1.7 Mb)
A Quicktime movie showing microscopic "smart dust" particles dispersed in water. The smart dust consists of porous Si rugate filters, removed from the Si substrate and ultrasonicated to break them up into particles. These photonic crystals change color depending on the chemicals in the pores. Filmed by T.J. Kielty and Michael Z. Szopiac.
Robot using a porous Si photonic crystal sensor (9.3 Mb)
An MPEG-4 movie showing a robot employing a modified line-tracker circuit that uses two porous Si photonic crystal sensors. The clip shows the robot being activated by and tracking a trail of liquid ethanol. It then shows the robot being exposed to water vapor and then ethanol vapor. It only responds to the ethanol vapor and ignores the water vapor. Made by Jason Dorvee.