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- Title
Plasmonic Properties of the End-to-End and Side-by-Side Assembled Au Nanorods.
- Authors
Liu, Jinsheng; Kan, Caixia; Li, Yuling; Xu, Haiying; Ni, Yuan; Shi, Daning
- Abstract
Well-defined assemblies of Au nanorods (NRs) exhibit outstanding optical and electric properties, including surface plasmon resonance (SPR) of an individual nanorod and the coupling SPR among the assemblies. We present a direct approach for end-to-end (E-E) and side-by-side (S-S) assembly of Au NRs using poly (ethylene glycol) dithiol (HS-PEG-SH) and cysteine (Cys), respectively. The coupling SPR properties between the neighboring Au NRs are studied through experimental measurements and finite-different time-domain (FDTD) simulations. The simulated SPR tunability over the assembly agree with that of the experimental results, and both of the longitudinal SPR shifts for E-E and S-S assemblies are well fitted with the exponential function. The present assembled method provides a way for directing anisotropic nanostructures into well-defined orientations, and will be potentially useful in optoelectronics and biomedical engineering.
- Subjects
OPTICAL properties of nanorods; GOLD; SURFACE plasmon resonance; POLYETHYLENE glycol; FINITE difference method
- Publication
Plasmonics, 2015, Vol 10, Issue 1, p117
- ISSN
1557-1955
- Publication type
Article
- DOI
10.1007/s11468-014-9784-2