Electrochemical Sensors for Understanding Icy Worlds

Metadata Updated: February 28, 2019

As NASA explores Ocean Worlds and looks for habitable environments, it will be advantageous to perform liquid analyses of samples because (frozen) aqueous solutions will be the sample[HTML_REMOVED]s natural state. As part of these missions, the ability to make bulk and trace soluble inorganic ion measurements will be critical to allow comparative oceanography of different worlds. Ion selective electrodes (ISEs) have demonstrated their value in making soluble ion measurements during the Phoenix lander mission on Mars. This project focuses on incorporating developments in ISE technology in the 10+ years since the Phoenix mission sensors were built in order to allow them to be more effective on upcoming longer duration Ocean Worlds missions.As the exploration of Ocean Worlds in our Solar System advances a key science requirement will be to understand what observations at the surface tell us about the oceans hidden below. The ability to make bulk and trace soluble inorganic ion measurements will be critical to understand the habitability of these oceans by providing constraints on the redox balance, pH, and chemosynthetic metabolism pathways available in the oceans. Ion selective electrode (ISE) technology is a powerful tool for measuring soluble inorganic ions as demonstrated on the Mars Phoenix lander mission. Sensor technology has been improved in the 10+ years since the development of the Phoenix mission, primarily by the switch to solid contact ISEs (SC-ISEs) using nanostructured carbon materials (e.g., carbon nanotubes,[HTML_REMOVED]platinum nanoparticles etc.). There are many benefits of SC-ISEs to planetary exploration including improved robustness over the long storage periods needed to travel to the outer solar system, the ability to be reduced in size without compromising sensor lifetime, improved limits-of-detection, and reduction in sensor-to-sensor variability. Our approach will be to incorporate the current state-of-the-art in laboratory SC-ISEs to accrue the benefits listed above, and then perform the necessary testing to bring the sensors to TRL 5.

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019

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Harvested from NASA Data.json

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Resource Type Dataset
Metadata Created Date February 28, 2019
Metadata Updated Date February 28, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_92708
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 95194a16-70e8-4c71-a27e-2d1d2b669cd1
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2018-09-01
Homepage URL https://techport.nasa.gov/view/92708
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-09-05
Program Code 026:027
Source Datajson Identifier True
Source Hash 1687fe6ac0e1102b7ed7b028d5bdebae0c817268
Source Schema Version 1.1

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