Radiolytic redox interplay defines nanomaterial synthesis in liquids

Ahmed, Auwais; Boyle, Erik C.; Kottke, Peter A.; Fedorov, Andrei G.

doi:10.1126/sciadv.abj8751

Title: Radiolytic redox interplay defines nanomaterial synthesis in liquids

Journal Article · 16 December 2021 · Science Advances

DOI: https://doi.org/10.1126/sciadv.abj8751 · OSTI ID:1836482

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Georgia Inst. of Technology, Atlanta, GA (United States); Georgia Institute of Technology
Georgia Inst. of Technology, Atlanta, GA (United States)

Irradiation of a liquid solution generates solvated electrons and radiolysis products, which can lead to material deposition or etching. The chemical environment dictates the dominant reactions. Radiolysis-induced reactions in salt solutions have substantially different results in pure water versus water-ammonia, which extends the lifetime of solvated electrons. We investigate the interplay between transport and solution chemistry via the example of solid silver formation from e-beam irradiation of silver nitrate solutions in water and water-ammonia. The addition of ammonia results in the formation of a secondary ring-shaped deposit tens of microns in diameter (formed over tens of seconds) around the primary point of deposition (formed over milliseconds). Simulations uncover the relative importance of oxidizing and reducing reactions and transport effects. Our explanation of this behavior involves mechanisms beyond ammonia’s role in extending solvated electron lifetimes.

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Research Organization:: Georgia Tech Research Corporation, Atlanta, GA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0010729

OSTI ID:: 1836482

Journal Information:: Science Advances, Journal Name: Science Advances Journal Issue: 51 Vol. 7; ISSN 2375-2548

Publisher:: AAASCopyright Statement

Country of Publication:: United States

Language:: English

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ammonia-water solvent
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nanomaterials

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