Abstract

A surface-adsorbed monolayer of cap-shaped gold particles upon submicrometer-sized polystyrene spheres exhibits pronounced absorption in the visible region. When the surrounding refractive index was altered by immersion in a fluid, the direction of the shift in the absorption spectrum was dependent on the incidence angle of the irradiation. When a thiol molecule, known to adsorb selectively on gold upon polystyrene, was added, the resultant shift in the absorption spectrum’s peak was consistently toward longer wavelengths. Consequently, at certain incidence angles, a change in the refractive index of the surrounding fluid produces no shift, whereas thiol adsorption results in a clear shift, apparently reflecting the different spatial regions in which the refractive index is altered by these two procedures.

© 2002 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Systematic characterization of spectral surface plasmon resonance sensors with absorbance measurement

Zhi-mei Qi, Shanhong Xia, Mingdeng Wei, Hirofumi Matsuda, and Haoshen Zhou
Appl. Opt. 46(32) 7963-7969 (2007)

Local plasmon sensor with gold colloid monolayers deposited upon glass substrates

Takayuki Okamoto, Ichirou Yamaguchi, and Tetsushi Kobayashi
Opt. Lett. 25(6) 372-374 (2000)

Colloidal gold submonolayer-coated thin-film glass plates for waveguide-coupled surface plasmon resonance sensors

Zhi-mei Qi, Naoki Matsuda, Takamitsu Yoshida, Akiko Takatsu, and Kenji Kato
Appl. Opt. 42(22) 4522-4528 (2003)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription