Researcher invents an easy-to-use technique to measure the hydrophobicity of micro- and nanoparticles

21-Oct-2019 - USA

The scientific and industrial communities who work with micro- and nanoparticles continue to labor with the challenge of effective particle dispersion. Most particles that disperse in liquids aggregate rapidly, and eventually precipitate, thereby separating from the liquid phase. While it is commonly accepted that the hydrophobicity of particles – how quickly water repels off a surface – determines their dispersion and aggregation potential, there has been no easy-to-use method to quantitatively determine the hydrophobicity of these tiny particles.

Copyright American Chemical Society

Easy-to-use optical method to quantitatively determine the surface free energy of micro- and nanoparticles.

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."

Original publication

Other news from the department science

These products might interest you

NANOPHOX CS

NANOPHOX CS by Sympatec

Particle size analysis in the nano range: Analyzing high concentrations with ease

Reliable results without time-consuming sample preparation

particle analyzers
Eclipse

Eclipse by Wyatt Technology

FFF-MALS system for separation and characterization of macromolecules and nanoparticles

The latest and most innovative FFF system designed for highest usability, robustness and data quality

DynaPro Plate Reader III

DynaPro Plate Reader III by Wyatt Technology

Screening of biopharmaceuticals and proteins with high-throughput dynamic light scattering (DLS)

Efficiently characterize your sample quality and stability from lead discovery to quality control

particle analyzers
Loading...

More news from our other portals

So close that even
molecules turn red...