Researcher invents an easy-to-use technique to measure the hydrophobicity of micro- and nanoparticles
Copyright American Chemical Society
Yi Zuo, University of Hawaii at Manoa College of Engineering and pediatrics professor, has invented a groundbreaking method that allows for easy determination of the surface free energy of particles as a quantitative measure of particle hydrophobicity.
"The major advantage of this method resides in its simplicity," said Zuo. "For the first time, the scientific and industrial community will have access to an inexpensive and easy-to-use method for quantitatively determining the hydrophobicity of particulate matter. Our method relies on a novel measuring principle and common laboratory procedures and equipment such as pipetting and visible-light spectroscopy."
Zuo has demonstrated the feasibility of this method in determining the surface free energy of various micro- and nanoparticles, such as carbon nanotubes, graphene and polystyrene particles.
The study may have a far-reaching implication for many scientific and industrial applications and disciplines that involve particulate matter. "For example, our method can be used to quantify the hydrophobicity of nanoparticles, which is of crucial importance for the study of potential health risks and biomedical applications of nanomaterials." Zuo said. "It may also find application in microbial science because the surface free energy of bacterial cells determines the cellular adhesion and proliferation in biofilms."
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