Optical characterization of multi-component Au-colloid-DNA complexes

Author

Rehn, U. ; Gösele, U. ; Wehrspohn, R.B. ; Miclea, P.T.

Author_Institution

Max-Planck-Inst. of Microstruct. Phys., Halle

fYear

2005

fDate

17-17 June 2005

Firstpage

639

Lastpage

639

Abstract

In this communication, we report on the results of experimental studies on the linking of Au colloids with different sizes (20, 50 and 80 nm in diameter) coupled by double-stranded DNA. Samples were characterized by optical transmission spectroscopy in the visible and near-infrared range and compared to transmission electron microscopy of the dried sample. The surface plasmon resonance of the Au particles coupled by DNA chains are recorded and compared with the spectra of isolated particles. In the cases of DNA chains functionalized with two thiol groups the spectra shows a broadening and a red shift of the surface plasmons which is a result of coupling the particles by this chains

Keywords

DNA; colloids; gold; infrared spectra; molecular biophysics; red shift; spectral line broadening; surface plasmon resonance; visible spectra; 20 nm; 50 nm; 80 nm; Au; Au colloid linking; DNA chain; double-stranded DNA; near-infrared spectra; optical characterization; optical transmission spectroscopy; red shift; spectral broadening; surface plasmon resonance; thiol group; transmission electron microscopy; visible spectra; Couplings; DNA; Electron optics; Gold; Joining processes; Optical microscopy; Optical recording; Plasmons; Spectroscopy; Transmission electron microscopy;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics Europe, 2005. CLEO/Europe. 2005 Conference on

Conference_Location

Munich

Print_ISBN

0-7803-8974-3

Type

conf

DOI

10.1109/CLEOE.2005.1568415

Filename

1568415