skip to main content
US FlagAn official website of the United States government
dot gov icon
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
https lock icon
Secure .gov websites use HTTPS
A lock ( lock ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.


Title: Fluorescent responses of CdSe and Si QDs toward Copper (II) ion and the mixed-QDs probe for Cu2+ ion sensing
Award ID(s):
2109064
PAR ID:
10417068
Author(s) / Creator(s):
; ; ; ; ;
Date Published:
Journal Name:
Journal of Molecular Structure
Volume:
1271
Issue:
C
ISSN:
0022-2860
Page Range / eLocation ID:
134050
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
More Like this
  1. Fabricating polymeric membranes with ion-specific selectivity has been targeted in recent years to address the growing challenges of water and resource scarcity. Inspired by discoveries of the selectivity mechanisms in biological channels, ion dehydration has been increasingly recognized as a key phenomenon governing the transport and selectivity in dense polymeric membranes and other synthetic nanochannels. However, understanding the molecular details of this phenomenon and leveraging and controlling it to increase the selectivity between ions in state-ofthe-art membranes remain elusive. In this Perspective, we discuss the foundations of ion dehydration and explore opportunities to study and leverage this phenomenon for improving ion−ion selectivity in membranes. We first introduce the fundamentals and measurements of ion’s hydration properties in solution, distinguishing between static and dynamic hydration properties. Next, we discuss simulation and experimental techniques to study ion dehydration under confinement, highlighting critical knowledge gaps that impede our understanding of this phenomenon. We then discuss effects of ion dehydration on the energy landscape of ion transport and analyze attempts in the literature to improve ion selectivity by promoting dehydration of specific ions. We conclude by proposing research directions to enhance our understanding of ion dehydration and fabricate sustainable and robust membranes with ion-specific selectivity. 
    more » « less