Journal article
Nanoscale optical biosensor: Short range distance dependence of the localized surface plasmon resonance of noble metal nanoparticles
The journal of physical chemistry. B, Vol.108(22), pp.6961-6968
2004
DOI: 10.1021/jp036261n
Abstract
Silver and gold nanotriangles were fabricated by nanosphere lithography (NSL) and their localized surface plasmon resonance (LSPR) spectra were measured by UV−vis extinction spectroscopy. It is demonstrated that the short range (viz., 0−2 nm) distance dependence of the electromagnetic fields that surround these nanoparticles when resonantly excited can be systematically tuned by changing their size, structure, and composition. This is accomplished by measuring the shift in the peak wavelength, λmax, of their LSPR spectra caused by the adsorption of hexadecanethiol as a function of nanoparticle size (in-plane width, out-of-plane height, and aspect ratio), shape (truncated tetrahedron versus hemisphere), and composition (silver versus gold). We find that the hexadecanethiol-induced LSPR shift for Ag triangles decreases when in-plane width is increased at fixed out-of-plane height or when height is increased at fixed width. These trends are the opposite to what was seen in an earlier study of the long range ...
Details
- Title: Subtitle
- Nanoscale optical biosensor: Short range distance dependence of the localized surface plasmon resonance of noble metal nanoparticles
- Creators
- Amanda J HaesShengli ZouGeorge C SchatzRichard P Van Duyne
- Resource Type
- Journal article
- Publication Details
- The journal of physical chemistry. B, Vol.108(22), pp.6961-6968
- DOI
- 10.1021/jp036261n
- NLM abbreviation
- J Phys Chem B
- ISSN
- 1520-6106
- eISSN
- 1520-5207
- Publisher
- American Chemical Society
- Language
- English
- Date published
- 2004
- Academic Unit
- Chemistry
- Record Identifier
- 9983985808402771
Metrics
10 Record Views