Bridging the Gap between SERS Ehnancement and Reproducibility by Salt Aggregated Silver Nanoparticles
Citation:
Sam Mehigan, Ciaran A Smyth and Eithne M. McCabe, Bridging the Gap between SERS Ehnancement and Reproducibility by Salt Aggregated Silver Nanoparticles, Nanomaterials and Nanotechnology, 5, 1, 2015, 1-6Download Item:
Abstract:
Silver colloid based nanostructures are a very common
means of achieving strong SERS signals. This is due to
the hot spots that are formed in between the nanoparti‐
cles, as well as their ease of synthesis. They are frequent‐
ly
dismissed,
however,
as
irreproducible
when
compared
to other metal nanostructures, due to the random nature
of their formation in a solution. Silver nanoparticle
substrates
or
carefully
constructed
arrays
can
be
made
to
be
uniform,
but
they
often
require
a
large
amount
of
time
to produce, as well as expensive equipment. We will
show
that
by
making
some
adjustments
to
the
experimen‐
tal setup, silver colloids that have been aggregated to
form large flakes can offer both the enhancement factor
and reproducibility of many other more expensive and
complicated SERS techniques.
Silver colloids aggregated into large flake-like structures
have been investigated for their surface-enhanced Raman
spectroscopy (SERS) properties. These flakes have been
imaged using scanning electron microscopy (SEM) and
have also been characterized using UV/Vis spectroscopy.
They have been highlighted as a cheap and simple means
or achieving large Raman enhancement with strong
reproducibility, especially when compared to many
common methods of substrate fabrication that are more
difficult to fabricate. Detection of Rhodamine 6G at a
concentration of 5x10
-13
M has been achieved, as well as
xanthopterin at a concentration of 5x10
-9
M
Author's Homepage:
http://people.tcd.ie/emccabeDescription:
PUBLISHED
Author: MCCABE, EITHNE
Type of material:
Journal ArticleCollections
Series/Report no:
Nanomaterials and Nanotechnology5
1
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Full text availableSubject (TCD):
Nanoscience & MaterialsDOI:
http://dx.doi.org/10.5772/60125Metadata
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