In a finding that will be useful in nanoscale engineering, Brown University researchers, including Engineering doctoral student Weilin Deng, have shown that miniscule differences in the roughness of surfaces can have important effects on how they stick together. In a series of papers, the latest of which is published in Scientific Reports, the researchers show that miniscule differences in the roughness of a surface can cause surprising changes in the way two surfaces adhere to each other. Certain levels of roughness, the studies show, can cause the surfaces to exert different amounts of force on each other depending upon whether they're being pushed together or pulled apart. Read more.
February 11, 2019