Loading...
Please wait, while we are loading the content...
Similar Documents
Direct investigation of surface plasmon sensitive surface enhanced Raman scattering using single Ag nano-aggregates
| Content Provider | Semantic Scholar |
|---|---|
| Author | Itoh, Tamitake Hashimoto, Kazuhiro Kikkawa, Yasuo Ikehata, Akifumi Ozaki, Yukihiro |
| Copyright Year | 2004 |
| Abstract | We investigated polarization dependences of surface enhanced resonance Raman scattering (SERRS) and surface plasmon resonance (SPR) to identify the SERRS yielding SPR bands. We also studied SERRS excitation spectra for single Ag nano-aggregates with the SPR bands to explore the electromagnetic (EM) and resonance contribution to SERRS. Surface enhanced resonance Raman scattering (SERRS) has recently been a matter of great interest from the points of its applications as well as basic science because it allows one single molecule detection due to its enormous enhancement factor by 10 to 10. However, the varieties of molecules and metal substrates that yield SERRS are quite limited and its mechanism is still unclear. Recently, experimental studies on relationship between surface plasmon resonance (SPR) and SERRS have rapidly been advanced because several groups achieved SERRS detections using single Ag nano-aggregate and/or single adsorbed dye molecule systems [1-5]. These SERRS researches are valuable to optimize the electromagnetic (EM) interactions at metal nano-structure/adsorbed molecule systems for single-molecule bioanalysis and nano-biodevice. In the present study, polarization dependences of SERRS and SPR are investigated for identification of the SERRS yielding SPR bands. SERRS excitation spectra are investigated for single Ag nano-aggregates with the SPR bands to exam the EM and resonance contribution to SERRS. A mixture of a NaCl (10 mM) aqueous solution and that of Rhodamine 6G (R6G) (1.1×10 M) is added to the Ag colloidal solution, and is spin-coated onto a glass plate. White and resonance Raman excitation light are introduced into a stage of optical microscope through the same pass with a dark and brightfield condenser, and focused onto a glass plate with dispersed Ag particles. The scattered light from an Ag particle is collected with an objective lens and passed a polarizer and led to a polychromator. The SERRS active Ag particles always look nano-aggregates consisting of many particles by AFM measurements. |
| Starting Page | 32 |
| Ending Page | 35 |
| Page Count | 4 |
| File Format | PDF HTM / HTML |
| DOI | 10.1071/sa0402012 |
| Volume Number | 2 |
| Alternate Webpage(s) | http://www.publish.csiro.au/SA/pdf/SA0402012 |
| Alternate Webpage(s) | https://doi.org/10.1071/sa0402012 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
