The following information was submitted:
Transactions: INTERNATIONAL JOURNAL of CIRCUITS, SYSTEMS and SIGNAL PROCESSING
Transactions ID Number: 20-606
Full Name: Frank Hubenthal
Position: Assistant Professor
Age: ON
Sex: Male
Address: University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel
Country: GERMANY
Tel: +49 (0)561 804 4501
Tel prefix:
Fax: +49 (0)561 804 4518
E-mail address: hubentha@physik.uni-kassel.de
Other E-mails:
Title of the Paper: Surface plasmon resonance spectroscopy for in situ sensing of molecular nanowire formation
Authors as they appear in the Paper: Rodica Morarescu, Frank Träger, Frank Hubenthal
Email addresses of all the authors: hubentha@physik.uni-kassel.de
Number of paper pages: 8
Abstract: We have investigated adsorption of different molecules and molecular wire formation on gold nanoparticles by in situ surface plasmon resonance spectroscopy. For this purpose, highly ordered gold nanoparticle arrays on fused silica have been prepared by nanosphere lithography and served as plasmonic substrates. Two arrays with different sized triangular nanoparticles, either with a base of the triangle of (74 +/- 6) nm or with a base of the triangle of (465 +/- 28) nm, were used for the sensitivity measurements. After molecular adsorption on the nanoparticles, we observed significantly larger plasmon shifts and an up to 4 times higher sensitivity for the small triangular nanoparticles. This higher sensitivity is attributed to their higher surface to volume ratio compared to the large triangular nanoparticles. After the sensitivity measurements, molecular wire formation has been performed using a ruthenium complex, a double cyclodextrin unit, and an iridium complex. !
The molecules have been stepwise assembled on highly ordered small triangular gold nanoparticles, which served as anchor points. We observed distinct shifts of the plasmon resonance from 20 nm to 46 nm, depending on the wire length. The results demonstrate that a molecular wire formation can be monitored with high sensitivity and in situ by surface plasmon resonance spectroscopy.
Keywords: Gold nanoparticles, Nanosphere lithography, Plasmon resonance spectroscopy, Triangular nanoparticles
EXTENSION of the file: .pdf
Special (Invited) Session: Surface Plasmon Resonance Spectroscopy for In Situ Sensing of Molecular Nanowire Formation
Organizer of the Session: 650-572
How Did you learn about congress:
IP ADDRESS: 141.51.197.39
