Abstract
We used coherent anti-Stokes scattering (CAS) to characterize individual gold nanorods (GNRs) and GNR aggregates. By creating samples with different densities of GNRs on silicon wafer substrates, we were able to determine surface coverage by scanning electron microscopy (SEM) and then correlate the coverage to the CAS intensities of the samples. The observed CAS signal intensity was quadratically dependent on the number of particles. We also examined the CAS signal as a function of the excitation polarization and found that the strongest signals in regularly oriented GNRs were observed when the beam polarization was aligned with the longitudinal axis of the GNRs. Irregularly oriented GNRs exhibited a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs showed cos 6 (θ) behavior. By imaging nanoscale-sized GNR patterns using CAS and evaluating the results with SEM, we show that CAS can be used for efficient, label-free imaging of nanoscale metallic particles. Scattered in all directions: Coherent anti-Stokes scattering (CAS) is used to characterize individual gold nanorods (GNRs) and GNR aggregates. The CAS signal is also examined as a function of the excitation polarization. Irregularly oriented GNRs exhibit a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs shows cos 6 (θ) behavior (see picture).
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1951-1955 |
| Number of pages | 5 |
| Journal | ChemPhysChem |
| Volume | 14 |
| Issue number | 9 |
| DOIs | |
| State | Published - Jun 24 2013 |
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Keywords
- CARS (coherent anti-Stokes Raman scattering)
- gold
- nanostructures
- nonlinear optics
- scanning probe microscopy
ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Atomic and Molecular Physics, and Optics
Cite this
Coherent anti-stokes emission from gold nanorods and its potential for imaging applications. / Jiang, Li; Schie, Iwan W.; Qian, Jun; He, Sailing; Huser, Thomas R.
In: ChemPhysChem, Vol. 14, No. 9, 24.06.2013, p. 1951-1955.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Coherent anti-stokes emission from gold nanorods and its potential for imaging applications
AU - Jiang, Li
AU - Schie, Iwan W.
AU - Qian, Jun
AU - He, Sailing
AU - Huser, Thomas R
PY - 2013/6/24
Y1 - 2013/6/24
N2 - We used coherent anti-Stokes scattering (CAS) to characterize individual gold nanorods (GNRs) and GNR aggregates. By creating samples with different densities of GNRs on silicon wafer substrates, we were able to determine surface coverage by scanning electron microscopy (SEM) and then correlate the coverage to the CAS intensities of the samples. The observed CAS signal intensity was quadratically dependent on the number of particles. We also examined the CAS signal as a function of the excitation polarization and found that the strongest signals in regularly oriented GNRs were observed when the beam polarization was aligned with the longitudinal axis of the GNRs. Irregularly oriented GNRs exhibited a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs showed cos 6 (θ) behavior. By imaging nanoscale-sized GNR patterns using CAS and evaluating the results with SEM, we show that CAS can be used for efficient, label-free imaging of nanoscale metallic particles. Scattered in all directions: Coherent anti-Stokes scattering (CAS) is used to characterize individual gold nanorods (GNRs) and GNR aggregates. The CAS signal is also examined as a function of the excitation polarization. Irregularly oriented GNRs exhibit a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs shows cos 6 (θ) behavior (see picture).
AB - We used coherent anti-Stokes scattering (CAS) to characterize individual gold nanorods (GNRs) and GNR aggregates. By creating samples with different densities of GNRs on silicon wafer substrates, we were able to determine surface coverage by scanning electron microscopy (SEM) and then correlate the coverage to the CAS intensities of the samples. The observed CAS signal intensity was quadratically dependent on the number of particles. We also examined the CAS signal as a function of the excitation polarization and found that the strongest signals in regularly oriented GNRs were observed when the beam polarization was aligned with the longitudinal axis of the GNRs. Irregularly oriented GNRs exhibited a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs showed cos 6 (θ) behavior. By imaging nanoscale-sized GNR patterns using CAS and evaluating the results with SEM, we show that CAS can be used for efficient, label-free imaging of nanoscale metallic particles. Scattered in all directions: Coherent anti-Stokes scattering (CAS) is used to characterize individual gold nanorods (GNRs) and GNR aggregates. The CAS signal is also examined as a function of the excitation polarization. Irregularly oriented GNRs exhibit a different scattering pattern to that observed for regularly oriented GNRs. The polarization-dependent scattering from oriented GNRs shows cos 6 (θ) behavior (see picture).
KW - CARS (coherent anti-Stokes Raman scattering)
KW - gold
KW - nanostructures
KW - nonlinear optics
KW - scanning probe microscopy
UR - http://www.scopus.com/inward/record.url?scp=84879158720&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84879158720&partnerID=8YFLogxK
U2 - 10.1002/cphc.201300091
DO - 10.1002/cphc.201300091
M3 - Article
C2 - 23650187
AN - SCOPUS:84879158720
VL - 14
SP - 1951
EP - 1955
JO - ChemPhysChem
JF - ChemPhysChem
SN - 1439-4235
IS - 9
ER -