With nanopore sensing, physics researchers detect subtle changes in single particles

ScienceDaily | 2/21/2019 | Staff
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"Nanopores act as extremely small volume sensors that are on the order of a few nanometers a side," said Joseph Reiner, Ph.D., an associate professor of experimental biophysics and nanoscience in the College of Humanities and Sciences. "This size scale allows us to observe when the cluster changes size by a single ligand molecule. The ability to detect these changes in real time -- as they happen -- to a single cluster particle is the new and exciting thing here."

The discovery is described in a paper, "Ligand-induced Structural Changes of Thiolate-capped Gold Nanoclusters Observed with Resistive-pulse Nanopore Sensing," by Reiner and physics professor Massimo F. Bertino, Ph.D., along with VCU students Bobby Cox, Peter Wilkerson and Patrick Woodworth, published in the Journal of the American Chemical Society.

Ways - Changes - Particle - Time - Reiner

"This is new because there really aren't many ways to detect these changes on a single particle in real time," Reiner said. "This opens the door to observe all kinds of interesting phenomenon on nanosurfaces, which is an area of great interest to many chemists in both applied and pure research areas."

The research sheds new light on the activity of clusters, which are extremely reactive objects and are considered to be interesting for catalysis, or...
(Excerpt) Read more at: ScienceDaily
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