Using Polyvinylpyrrolidone and Citrate Ions to Modify the Stability of Ag NPs in Ethylene Glycol

Suyue Chen; Hong Bok Lee; Lee Penn

doi:10.1021/acs.jpcc.9b00339

Using Polyvinylpyrrolidone and Citrate Ions to Modify the Stability of Ag NPs in Ethylene Glycol

Suyue Chen, Hong Bok Lee, Lee Penn

Research output: Contribution to journal › Article › peer-review

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Abstract

Silver nanoparticles (Ag NPs) can serve as seeds in the polyol synthesis of silver nanostructures. However, when heating suspensions of Ag NP seeds up to commonly employed reaction temperatures (e.g., 90 °C or higher for reactions in ethylene glycol), the size distribution of the product Ag NPs can broaden dramatically through a combination of oxidative dissolution, aggregation, and ripening. Results demonstrate that judicious selection of capping agent and pH can protect Ag NP seeds from these reactions, which prevents broadening of the size distribution. Further, polycrystalline seeds can be selectively dissolved, leaving single crystal seeds largely unaltered.

Original language	English (US)
Pages (from-to)	12444-12450
Number of pages	7
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	19
DOIs	https://doi.org/10.1021/acs.jpcc.9b00339
State	Published - May 16 2019

Bibliographical note

Funding Information:
We thank the Nanostructural Materials and Processes (NMP) program at the University of Minnesota for financial support. Parts of this work was carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program.

Publisher Copyright:
© 2019 American Chemical Society.

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title = "Using Polyvinylpyrrolidone and Citrate Ions to Modify the Stability of Ag NPs in Ethylene Glycol",

abstract = "Silver nanoparticles (Ag NPs) can serve as seeds in the polyol synthesis of silver nanostructures. However, when heating suspensions of Ag NP seeds up to commonly employed reaction temperatures (e.g., 90 °C or higher for reactions in ethylene glycol), the size distribution of the product Ag NPs can broaden dramatically through a combination of oxidative dissolution, aggregation, and ripening. Results demonstrate that judicious selection of capping agent and pH can protect Ag NP seeds from these reactions, which prevents broadening of the size distribution. Further, polycrystalline seeds can be selectively dissolved, leaving single crystal seeds largely unaltered.",

author = "Suyue Chen and Lee, {Hong Bok} and Lee Penn",

note = "Funding Information: We thank the Nanostructural Materials and Processes (NMP) program at the University of Minnesota for financial support. Parts of this work was carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program. Publisher Copyright: {\textcopyright} 2019 American Chemical Society.",

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AU - Chen, Suyue

AU - Lee, Hong Bok

AU - Penn, Lee

N1 - Funding Information: We thank the Nanostructural Materials and Processes (NMP) program at the University of Minnesota for financial support. Parts of this work was carried out in the Characterization Facility, University of Minnesota, which receives partial support from NSF through the MRSEC program. Publisher Copyright: © 2019 American Chemical Society.

PY - 2019/5/16

Y1 - 2019/5/16

N2 - Silver nanoparticles (Ag NPs) can serve as seeds in the polyol synthesis of silver nanostructures. However, when heating suspensions of Ag NP seeds up to commonly employed reaction temperatures (e.g., 90 °C or higher for reactions in ethylene glycol), the size distribution of the product Ag NPs can broaden dramatically through a combination of oxidative dissolution, aggregation, and ripening. Results demonstrate that judicious selection of capping agent and pH can protect Ag NP seeds from these reactions, which prevents broadening of the size distribution. Further, polycrystalline seeds can be selectively dissolved, leaving single crystal seeds largely unaltered.

AB - Silver nanoparticles (Ag NPs) can serve as seeds in the polyol synthesis of silver nanostructures. However, when heating suspensions of Ag NP seeds up to commonly employed reaction temperatures (e.g., 90 °C or higher for reactions in ethylene glycol), the size distribution of the product Ag NPs can broaden dramatically through a combination of oxidative dissolution, aggregation, and ripening. Results demonstrate that judicious selection of capping agent and pH can protect Ag NP seeds from these reactions, which prevents broadening of the size distribution. Further, polycrystalline seeds can be selectively dissolved, leaving single crystal seeds largely unaltered.

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Using Polyvinylpyrrolidone and Citrate Ions to Modify the Stability of Ag NPs in Ethylene Glycol

Abstract

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