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Title: Mask-Assisted Seeded Growth of Segmented Metallic Heteronanostructures

Journal Article · · Journal of Physical Chemistry. C
DOI:https://doi.org/10.1021/jp5094433· OSTI ID:1182540
 [1];  [2];  [1];  [2];  [1]
  1. Univ. of Arkansas, Fayetteville, AR (United States). Dept. of Chemistry and Biochemistry
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science Division

Controlling the deposition of exotic metals in the seeded growth of multi-metal nanostructures is challenging. This work describes a seeded growth method assisted by a mask for synthesis of segmented binary or ternary metal nanostructures. Silica is used as a mask to partially block the surface of a seed and a second metal is subsequently deposited on the exposed area, forming a bimetallic heterodimer. The initial demonstration was carried out on a Au seed, followed by deposition of Pd or Pt on the seed. It was found that Pd tends to spread out laterally on the seed while Pt inclines to grow vertically into branched topology on Au. Without removal of the SiO₂ mask, Pt could be further deposited on the unblocked Pd of the Pd-Au dimer to form a Pt-Pd-Au trimer. The mask-assisted seeded growth provides a general strategy to construct segmented metallic nanoarchitectures.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Advanced Research Projects Agency - Energy (ARPA-E)
Grant/Contract Number:
SC00112704
OSTI ID:
1182540
Report Number(s):
BNL-107641-2015-JA; R&D Project: M015MACA; KC0201010
Journal Information:
Journal of Physical Chemistry. C, Vol. 118, Issue 48; ISSN 1932-7447
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 23 works
Citation information provided by
Web of Science

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Cited By (4)

Structural and Optical Properties of Gold/Silica “Mushroom” Particles Prepared by Interfacial Templating journal December 2016
Interfaced heterogeneous nanodimers journal July 2015
Hybridized plasmon resonances in core/half-shell silver/cuprous oxide nanoparticles journal January 2020
Asymmetric silica encapsulation toward colloidal Janus nanoparticles: a concave nanoreactor for template-synthesis of an electocatalytic hollow Pt nanodendrite journal January 2016