In a new study, scientists have successfully found a way to bend and stretch diamonds. Diamonds are considered to be one of the hardest substances on earth, and a way to bend and stretch is truly a great achievement. Scientists knew that if they were able to make the diamonds as thin as possible, diamond could be flexible.
Recently, a group of researchers from the Massachusetts Institute of Technology (MIT) has demonstrated that diamond needles are about a thousand times thinner than a hair strand, can be bent and stretched up to nine percent without breaking. That is, if the diamonds could be made into ultrafine needles, then they can become flexible. The scientists also said that these diamond needles can return to their original position after pressure relief.
Researchers were accompanied by scientists from MIT's City University of Hong Kong and Nanyang Technological University in Singapore. The scientists took thin films of artificial diamonds and engraved tiny needles. These nano-needles measured only a few hundred nanometers (billionths of a meter). If they put the needles under pressure, they could bend them and stretch them by up to 9 percent without breaking. Normal diamonds have a yield strength of less than one percent.
Co-author of the study, Yang Lu of the Chinese University of Hong Kong, said that they developed a unique nanomechanical approach to accurately control and quantify the distributed ultra-large elastic strain in the nanodiamond sample. Prof. Subrah Suresh from NTU Singapore informed that their results were so surprising that they had to perform the experiments again under different conditions just to confirm them. "We also performed detailed computer simulations of the actual samples and bending experiments to measure and determine the maximum tensile stress and strain that the diamond nanopiples could withstand before fracture," said Suresh.
The researchers found that their latest The study showed that what is normally not possible on a microscopic and macroscopic scale can occur at the nanoscale, where the entire sample consists of dozens or hundreds of atoms and the ratio from surface to volume is large.