Journal
CHEMICAL PHYSICS LETTERS
Volume 417, Issue 1-3, Pages 230-234Publisher
ELSEVIER
DOI: 10.1016/j.cplett.2005.10.028
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We have synthesized a variety of Pd nanoparticles of 8-50 nm in size including solid cubes, hollow boxes, and porous cages. Using 4-mercaptopyridine (4MP) as a probe molecule, we have characterized thin films for surface-enhanced Raman scattering (SERS) activity, and have found a significant level of enhancement (with factors ranging from 170 for 8-nm cubes to 1.3 x 10(4) for boxes). For the cubes and boxes, we observed a trend of stronger enhancement with more red-shifted SPR bands. We evaluated the sensitivity of this approach, and also used SERS to monitor monolayer formation on these particles. (c) 2005 Elsevier B.V. All rights reserved.
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