fbpx
Português
Science | August 5th, 2015
Nanostructured Diamonds Using Ultrashort Laser Pulses

The results, by CNPEM researchers, were published in the journal “Scientific Reports” from Nature Group.

diamante-nanoestruturado-495x400-300x242A low-cost way to produce nanostructured diamonds from graphite was developed by researchers from the Brazilian Synchrotron Light Laboratory (LNLS), LNNano (Brazilian Nanotechnology National Laboratory) and Ipen (Nuclear and Energy Research Institute). They used ultrafast laser in order to generate a shock wave, which was able to achieve the pressure and temperature levels necessary to synthesize diamond.

The produced diamonds are composed by nanocrystals, with higher resistance and hardness if compared to natural diamonds. This kind of diamond is already produced in laboratory, but it involves a costly process due to the necessary equipment. In the work developed by the Brazilian researchers, the process can be carried out in medium-size laboratories from Brazil and abroad, with lower costs.
The answer is the use of ultrashort laser pulses which causes fast variations of the environmental energy, thus inducing phase transitions in carbon. This enabled the researchers to achieve the necessary pressure and temperature levels in order to produce diamond-like phase from graphite. The results were noticed in the journal “Scientific Reports” from Nature group.
   
Source: Francisco C. B. Maia, Ricardo E. Samad, Jefferson Bettini, Raul O. Freitas, Nilson D. Vieira Junior & Narcizo M. Souza-Neto, Synthesis of diamond-like phase from graphite by ultrafast laser driven dynamical compression. Scientific Reports 5, Article number: 11812 (2015). doi:10.1038/srep11812
MORE Science

The control processes shown here open new paths to pattern transport from exclusion to preconcentration of charged molecules by selecting the appropriate polymerization strategy and polymerization parameters.

This immediately suggests the hypothesis that, since very few T4SS have been characterized to date, T4SS-mediated bacterial killing may not be restricted to the Xanthomonadaceae family, and may in fact be a more widespread phenomenon.