Langmuir−Blodgett Silver Nanowire Monolayers for Molecular Sensing Using Surface-Enhanced Raman Spectroscopy
University of California, Berkeley · Lawrence Berkeley National Laboratory · +1 more institution
Abstract
Langmuir−Blodgett technique was used to assemble monolayers (with areas over 20 cm2) of aligned silver nanowires that are ∼50 nm in diameter and 2−3 μm in length. These nanowires possess pentagonal cross-sections and pyramidal tips. They are close-packed and are aligned parallel to each other. The resulting nanowire monolayers serve as excellent substrates for surface-enhanced Raman spectroscopy (SERS) with large electromagnetic field enhancement factors (2 × 105 for thiol and 2,4-dinitrotoluene, and 2 × 109 for Rhodamine 6G) and can readily be used in ultrasensitive, molecule-specific sensing utilizing vibrational signatures.
Citation impact
- FWCI
- 25.07
- Percentile
- 100%
- References
- 23
Authors
8- ARAndrea R. TaoCorresponding
University of California, Berkeley, Lawrence Berkeley National Laboratory, University of Washington
- FKFranklin Kim
Lawrence Berkeley National Laboratory, University of California, Berkeley, University of Washington
- CHChristian Heß
University of Washington, Lawrence Berkeley National Laboratory, University of California, Berkeley
- JEJoshua E. Goldberger
University of California, Berkeley, University of Washington, Lawrence Berkeley National Laboratory
- RHRongrui He
University of Washington, Lawrence Berkeley National Laboratory, University of California, Berkeley
Topics & keywords
- Monolayer
- Raman spectroscopy
- Langmuir–Blodgett film
- Rhodamine 6G
- Nanowire
- Materials science
- Surface-enhanced Raman spectroscopy
- Molecule