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Title: Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes

Abstract

Synthetic membranes containing asymmetrically shaped pores have been shown to rectify the ionic current flowing through the membrane. Ion-current rectification means that such membranes produce nonlinear current–voltage curves analogous to those observed with solid-state diode rectifiers. In order to observe this ion-current rectification phenomenon, the asymmetrically shaped pores must have pore-wall surface charge. Pore-wall surface charge also allows for electroosmotic flow (EOF) to occur through the membrane. We have shown that, because ion-current is rectified, EOF is likewise rectified in such membranes. This means that flow through the membrane depends on the polarity of the voltage applied across the membrane, one polarity producing a higher, and the opposite producing a lower, flow rate. As is reviewed here, these ion-current and EOF rectification phenomena are being used to develop new sensing technologies. Results obtained from an ion-current-based sensor for hydrophobic cations are reviewed. In addition, ion-current and EOF rectification can be combined to make a new type of device—a chemoresponsive nanofluidic pump. This is a pump that either turns flow on or turns flow off, when a specific chemical species is detected. Results from a prototype Pb2+ chemoresponsive pump are also reviewed here.

Authors:
ORCiD logo; ; ORCiD logo
Publication Date:
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1605947
Grant/Contract Number:  
DESC0001160; SC0019112
Resource Type:
Journal Article: Published Article
Journal Name:
Nanomaterials
Additional Journal Information:
Journal Name: Nanomaterials Journal Volume: 10 Journal Issue: 3; Journal ID: ISSN 2079-4991
Publisher:
MDPI AG
Country of Publication:
Switzerland
Language:
English

Citation Formats

Bush, Stevie N., Volta, Thomas T., and Martin, Charles R. Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes. Switzerland: N. p., 2020. Web. doi:10.3390/nano10030571.
Bush, Stevie N., Volta, Thomas T., & Martin, Charles R. Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes. Switzerland. https://doi.org/10.3390/nano10030571
Bush, Stevie N., Volta, Thomas T., and Martin, Charles R. Sat . "Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes". Switzerland. https://doi.org/10.3390/nano10030571.
@article{osti_1605947,
title = {Chemical Sensing and Chemoresponsive Pumping with Conical-Pore Polymeric Membranes},
author = {Bush, Stevie N. and Volta, Thomas T. and Martin, Charles R.},
abstractNote = {Synthetic membranes containing asymmetrically shaped pores have been shown to rectify the ionic current flowing through the membrane. Ion-current rectification means that such membranes produce nonlinear current–voltage curves analogous to those observed with solid-state diode rectifiers. In order to observe this ion-current rectification phenomenon, the asymmetrically shaped pores must have pore-wall surface charge. Pore-wall surface charge also allows for electroosmotic flow (EOF) to occur through the membrane. We have shown that, because ion-current is rectified, EOF is likewise rectified in such membranes. This means that flow through the membrane depends on the polarity of the voltage applied across the membrane, one polarity producing a higher, and the opposite producing a lower, flow rate. As is reviewed here, these ion-current and EOF rectification phenomena are being used to develop new sensing technologies. Results obtained from an ion-current-based sensor for hydrophobic cations are reviewed. In addition, ion-current and EOF rectification can be combined to make a new type of device—a chemoresponsive nanofluidic pump. This is a pump that either turns flow on or turns flow off, when a specific chemical species is detected. Results from a prototype Pb2+ chemoresponsive pump are also reviewed here.},
doi = {10.3390/nano10030571},
url = {https://www.osti.gov/biblio/1605947}, journal = {Nanomaterials},
issn = {2079-4991},
number = 3,
volume = 10,
place = {Switzerland},
year = {2020},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at https://doi.org/10.3390/nano10030571

Citation Metrics:
Cited by: 1 work
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