OSA's Digital Library

Applied Spectroscopy

Applied Spectroscopy

| PUBLISHED BY SAS — AVAILABLE FROM SAS AND OSA

  • Vol. 61, Iss. 9 — Sep. 1, 2007
  • pp: 1007–1014

Ellipsometric Advances for Local Surface Plasmon Resonance to Determine Chitosan Adsorption on Layer-by-Layer Gold Nanoparticles

Yen Hsun SU, Lay Gaik Teoh, Wei Hao Lai, Shih-Hui Chang, Hui-Chia Yang, and Min Hsiung Hon

Applied Spectroscopy, Vol. 61, Issue 9, pp. 1007-1014 (2007)


View Full Text Article

Acrobat PDF (471 KB)





Browse Journals / Lookup Meetings

Browse by Journal and Year


   


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools

Share
Citations
  • Export Citation/Save Click for help

Abstract

The ellipsometric measurement of local surface plasmon resonance (LSPR) caused by the adsorption of chitosan on layer-by-layer gold nanoparticles (Au NPs) was investigated. Six nanometer (6 nm) Au NPs were prepared and layer-by-layer Au NPs were fabricated to shift the LSPR to 520, 540, and 560 nm, respectively, due to the Mie theory. The thicknesses and the fractions of the layer-by-layer Au NPs were measured accurately using a combination of the Fresnel equation and the Maxwell–Garnett equations for ellipsometry. Furthermore, the position of the LSPR was shifted by chitosan. Using trajectory to record the trace of polarized light for ellipsometry resulting from LSPR, it was found that LSPR is predominantly induced when the LSPR position is close to the wavelength of the ellipsometric measurement. The trajectory circle of LSPR is very large for an increase of chitosan adsorption on Au NPs when the LSPR position is close to the detected wavelength. The linear approximation aspect quantifying the trajectory corresponds with the change of LSPR for the adsorption of chitosan, except for cases with low incidence and Brewster angles. The aspects and technologies of ellipsometry will benefit from the findings in this study, with potential applications in the fields of determination of molecular adsorption.

Virtual Issues
Vol. 2, Iss. 10 Virtual Journal for Biomedical Optics

Citation
Yen Hsun SU, Lay Gaik Teoh, Wei Hao Lai, Shih-Hui Chang, Hui-Chia Yang, and Min Hsiung Hon, "Ellipsometric Advances for Local Surface Plasmon Resonance to Determine Chitosan Adsorption on Layer-by-Layer Gold Nanoparticles," Appl. Spectrosc. 61, 1007-1014 (2007)
http://www.opticsinfobase.org/as/abstract.cfm?URI=as-61-9-1007

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
Log in to access OSA Member Subscription

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
Log in to access OSA Member Subscription

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited