Michigan Tech Scientists Verify Nanodiamond Discovery
Clockwise, microplasma dissociates ethanol vapor, carbon particles are collected and dispersed in solution, and an electron microscope image reveals nanosized diamond particles. Case Western Reserve University image
October 21, 2013—
Diamonds, usually forged in overwhelming heat and pressure miles deep in the Earth’s mantle, have now been made at atmospheric pressure and 100 degrees Celcius—the boiling point of water.
No one will be wearing these diamonds on their ring finger, however. They are nanodiamonds, just two or three nanometers across, invisible to all but electron microscopes. But their properties could be as alluring as crown jewels. Unlike the other form of carbon, graphite, diamond is a semiconductor, similar to silicon, which is the dominant material in the electronics industry, and gallium arsenide, which is used in lasers and other optical devices.
The discovery, by project leader Mohan Sankaran, associate professor of chemical engineering at Case Western Reserve University, was aided by physics professor Yoke Khin Yap and graduate student Boyi Hao of Michigan Technological University. Using ultraviolet Raman spectroscopy in Yap’s lab, they confirmed that Sankaran’s group had indeed made nanodiamonds.
The nanodiamonds are formed directly from a gas and require no surface to grow on. Their investigation is published Oct. 19 in the scientific journal Nature Communications. The discovery holds promise for many uses in technology and industry, such as coating plastics with ultrafine diamond powder and making flexible electronics, implants, drug-delivery devices and more products that take advantage of diamond’s exceptional properties.
Case Western senior news and information specialist Kevin Mayhood contributed to this story. To learn more, see his Case Western Reserve press release.
Michigan Technological University (www.mtu.edu) is a leading public research university developing new technologies and preparing students to create the future for a prosperous and sustainable world. Michigan Tech offers more than 120 undergraduate and graduate degree programs in engineering; forest resources; computing; technology; business; economics; natural, physical and environmental sciences; arts; humanities; and social sciences.