Nanoparticle-free single molecule anti-stokes Raman spectroscopy.
In the absence of large, plasmon-supporting nanoparticles, biocompatible dendrimer- and peptide-encapsulated few-atom Ag nanoclusters produce scaffold-specific single molecule (SM) Stokes and anti-Stokes Raman scattering. The strong SM vibrational signatures are enhanced by the Agn transitions in nanoparticle-free samples and cannot arise from plasmon enhancement. Characteristic SM-Raman intermittency is observed, with antibunching of the underlying Agn emission directly confirming the SM nature of the emissive species.
Peyser-Capadona
Lynn
L
School of Chemistry and Biochemistry, Georgia Institute of Technology Atlanta, Georgia 30332-0400, USA.
Capadona
Lynn Peyser
LP
Zheng
Jie
J
González
Jose I
JI
Lee
Tae-Hee
TH
Patel
Sandeep A
SA
Dickson
Robert M
RM
D020099:Coated Materials, Biocompatible / Q000032:analysis* / Q000737:chemistry*; D050091:Dendrimers; D049329:Nanostructures / Q000032:analysis / Q000737:chemistry*; D010455:Peptides / Q000032:analysis / Q000737:chemistry*; D011073:Polyamines / Q000032:analysis / Q000737:chemistry*; D012834:Silver / Q000032:analysis / Q000737:chemistry*; D013059:Spectrum Analysis, Raman / Q000379:methods*
D020099:Coated Materials, Biocompatible; D050091:Dendrimers; C104700:PAMAM Starburst; D010455:Peptides; D011073:Polyamines; D012834:Silver