Polyvinylpyrrolidone-induced anisotropic growth of gold nanoprisms in plasmon-driven synthesis

Zhai, Yueming; DuChene, Joseph S.; Wang, Yi-Chung; Qiu, Jingjing; Johnston-Peck, Aaron C.; You, Bo; Guo, Wenxiao; DiCiaccio, Benedetto; Qian, Kun; Zhao, Evan W.; Ooi, Frances; Hu, Dehong; Su, Dong; Stach, Eric A.; Zhu, Zihua; Wei, Wei David

doi:10.1038/nmat4683

Polyvinylpyrrolidone-induced anisotropic growth of gold nanoprisms in plasmon-driven synthesis

Journal Article · Mon Jul 04 04:00:00 EDT 2016 · Nature Materials

DOI:https://doi.org/10.1038/nmat4683· OSTI ID:1290403

Zhai, Yueming; DuChene, Joseph S.; Wang, Yi-Chung; Qiu, Jingjing; Johnston-Peck, Aaron C.; You, Bo; Guo, Wenxiao; DiCiaccio, Benedetto; Qian, Kun; Zhao, Evan W.; Ooi, Frances; Hu, Dehong; ; ; Zhu, Zihua; Wei, Wei David

After more than a decade, it is still unknown whether the plasmon-mediated growth of silver nanostructures can be extended to the synthesis of other noble metals, as the molecular mechanisms governing the growth process remain elusive. Herein, we demonstrate the plasmon-driven synthesis of gold nanoprisms and elucidate the details of the photochemical growth mechanism at the single-nanoparticle level. Our investigation reveals that the surfactant polyvinylpyrrolidone preferentially adsorbs along the nanoprism perimeter and serves as a photochemical relay to direct the anisotropic growth of gold nanoprisms. This discovery confers a unique function to polyvinylpyrrolidone that is fundamentally diferent from its widely accepted role as a crystal-face-blocking ligand. Additionally, we find that nanocrystal twinning exerts a profound influence on the kinetics of this photochemical process by controlling the transport of plasmon-generated hot electrons to polyvinylpyrrolidone. These insights establish a molecular-level description of the underlying mechanisms regulating the plasmon-driven synthesis of gold nanoprisms.

Research Organization:: Pacific Northwest National Laboratory (PNNL), Richland, WA (US), Environmental Molecular Sciences Laboratory (EMSL)

Sponsoring Organization:: USDOE

DOE Contract Number:: AC05-76RL01830

OSTI ID:: 1290403

Report Number(s):: PNNL-SA-107281; 40065; KP1704020

Journal Information:: Nature Materials, Journal Name: Nature Materials Journal Issue: 8 Vol. 15; ISSN 1476-1122

Publisher:: Nature Publishing Group

Country of Publication:: United States

Language:: English

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