Large-Area Periodic Arrays of Atomically Flat Single-Crystal Gold Nanotriangles Formed Directly on Substrate Surfaces

Neal, Robert D.; Lawson, Zachary R.; Tuff, Walker J.; Xu, Kaikui; Kumar, Vishal; Korsa, Matiyas T.; Zhukovskyi, Maksym; Rosenberger, Matthew R.; Adam, Jost; Hachtel, Jordan A.; Camden, Jon P.; Hughes, Robert A.; Neretina, Svetlana

doi:10.1002/smll.202205780

Large-Area Periodic Arrays of Atomically Flat Single-Crystal Gold Nanotriangles Formed Directly on Substrate Surfaces

Journal Article · Mon Nov 07 00:00:00 EST 2022 · Small

DOI:https://doi.org/10.1002/smll.202205780· OSTI ID:2000379

Neal, Robert D. ^[1]; Lawson, Zachary R. ^[1]; Tuff, Walker J. ^[1]; Xu, Kaikui ^[1]; Kumar, Vishal ^[1]; Korsa, Matiyas T. ^[2]; Zhukovskyi, Maksym ^[1]; ^[1]; ^[2]; ^[3]; ^[1]; ^[1]; ^[1]

University of Notre Dame, IN (United States)
Univ. of Southern Denmark, Odense (Denmark)
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)

The advancement of nanoenabled wafer-based devices requires the establishment of core competencies related to the deterministic positioning of nanometric building blocks over large areas. Within this realm, plasmonic single-crystal gold nanotriangles represent one of the most attractive nanoscale components but where the formation of addressable arrays at scale has heretofore proven impracticable. In this work, a benchtop process is presented for the formation of large-area periodic arrays of gold nanotriangles. The devised growth pathway sees the formation of an array of defect-laden seeds using lithographic and vapor-phase assembly processes followed by their placement in a growth solution promoting planar growth and threefold symmetric side-faceting. The nanotriangles formed in this high-yield synthesis distinguish themselves in that they are epitaxially aligned with the underlying substrate, grown to thicknesses that are not readily obtainable in colloidal syntheses, and present atomically flat pristine surfaces exhibiting gold atoms with a close-packed structure. As such, they express crisp and unambiguous plasmonic modes and form photoactive surfaces with highly tunable and readily modeled plasmon resonances. The devised methods, hence, advance the integration of single-crystal gold nanotriangles into device platforms and provide an overall fabrication strategy that is adaptable to other nanomaterials.

View Accepted Manuscript (DOE)

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Laboratory Directed Research and Development (LDRD) Program

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2000379

Journal Information:: Small, Journal Name: Small Journal Issue: 52 Vol. 18; ISSN 1613-6810

Publisher:: WileyCopyright Statement

Country of Publication:: United States

Language:: English

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