Adventures at high fields: from surface-charge inversion to nanopore ion-transport and molecular rotation

Seminar
QUEST Center event
No
Speaker
Jacob Klein (Weizmann Institute of Science)
Date
05/11/2018 - 12:30Add to Calendar 2018-11-05 12:30:00 2018-11-05 12:30:00 Adventures at high fields: from surface-charge inversion to nanopore ion-transport and molecular rotation Whenever two surfaces are at nanometer separation, as when they are in or close to contact, even small potential differences (<0.5V) between them may result in extremely large electric fields (of order 108 V/m) across the intersurface gap. Such large fields can readily affect interfacial phenomena. My talk will describe recent results where interactions between a molecularly smooth mica surface and a gold surface at variable potentials are measured directly, shedding light on different phenomena from the charging dynamics of an individual nanopore to a remarkable control of friction through surface potential changes. Physics 301 המחלקה לפיזיקה physics.dept@mail.biu.ac.il Asia/Jerusalem public
Place
Physics 301
Abstract

Whenever two surfaces are at nanometer separation, as when they are in or close to contact, even small potential differences (<0.5V) between them may result in extremely large electric fields (of order 108 V/m) across the intersurface gap. Such large fields can readily affect interfacial phenomena. My talk will describe recent results where interactions between a molecularly smooth mica surface and a gold surface at variable potentials are measured directly, shedding light on different phenomena from the charging dynamics of an individual nanopore to a remarkable control of friction through surface potential changes.

תאריך עדכון אחרון : 25/10/2018