NJIT Chemists Modify Carbon Nanotubes Using Microwaves
With a microwave oven hitting temperatures of 250 degrees Celsius, the researchers can chemically modify the tubes. Such a temperature is closer to radiation treatment than the output of a kitchen microwave oven. Since the reactions are fast, the nanotubes are not damaged or structurally modified. Once the tiny, microscopic tubes are chemically altered, they become soluble in common solvents like water and alcohol, and new kinds of films or coatings can be produced. The tubes can also be formulated into paints and plastic nanocomposites. The functionalized nanotubes become more useful than the pristine ones because the functionalized groups can be tailored for specific applications.
"We understand ourselves to be the first in the world to have discovered this method," said Mitra. "The beauty is that our method is green and clean. We use no toxic material and reduce the reaction times from hours-on occasion even days-to three minutes."
Iqbal noted that the method costs much less than others currently used. "Plus, the solubility of our carbon nanotubes are several times higher than any other researcher has yet reported in this short amount of time." Solubility is the most essential characteristic of carbon nanotubes since researchers must be able to dissolve them to see them work their magic.
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