CaltechAUTHORS
Published March 16, 2023 | Version public
Journal Article Metadata-only

Strong Substrate Binding Modulates the Acoustic Quality Factors in Gold Nanodisks

Creators

  • 1. ROR icon Rice University
  • 2. ROR icon Australian National University
  • 3. ROR icon University of Massachusetts Dartmouth
  • 4. ROR icon California Institute of Technology

Abstract

Lithographically prepared plasmonic nanoparticles are ideal mechanical probes, as their vibrational behavior can be precisely tuned through particle size and shape. But these particles exhibit strong intrinsic and extrinsic damping that results in small vibrational quality (Q) factors. Here, we perform single-particle transient transmission microscopy to investigate the effect of substrate-particle binding strength on the vibrational Q-factor of lithographically prepared gold nanodisks on glass. Weak and strong binding is realized through titanium adhesion layers of variable thickness. We find that strong binding leads to the generation of several new acoustic modes with varying Q-factors that depend on the particle aspect ratio and substrate material. Our work proposes an approach to tune enhanced acoustic Q-factors of lithographically prepared nanoparticles and offers a comprehensive description of their damping mechanism.

Additional Information

© 2023 American Chemical Society. Published as part of The Journal of Physical Chemistry C virtual special issue "Honoring Michael R. Berman". This work was funded by the National Science Foundation, Center for Adapting Flaws into Features (NSF CHE-2124983). S.L. thanks the Robert A. Welch Foundation for support through the Charles W. Duncan, Jr.-Welch Chair in Chemistry (C-0002). C.F.L acknowledges funding from the Robert A. Welch Foundation (C-1787) and support through the Kenneth S. Pitzer-Schlumberger Chair in Chemistry. N.J.H. acknowledges funding from the Robert A. Welch Foundation (C-1220). L.A.M. acknowledges the National Science Foundation Research Fellowship Program (1842494) for support. This work was conducted in part using resources of the Shared Equipment Authority at Rice University. The authors declare no competing financial interest.

Additional details

Identifiers

Eprint ID
120278
DOI
10.1021/acs.jpcc.2c09099
Resolver ID
CaltechAUTHORS:20230321-822516000.87

Related works

Describes
10.1021/acs.jpcc.2c09099 (DOI)

Funding

NSF
CHE-2124983
Robert A. Welch Foundation
C-0002
Robert A. Welch Foundation
C-1787
Robert A. Welch Foundation
C-1220
NSF Graduate Research Fellowship
DGE-1842494
Rice University

Dates

Created
2023-05-03
Created from EPrint's datestamp field
Updated
2023-05-03
Created from EPrint's last_modified field

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