SERS-active substrates based on metallic nanocracks on PDMS

Author

Mao, Haiyang ; Qian, Chuang ; Lv, Pengpeng ; Wu, Wengang

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Micro/Nano Fabrication, Peking Univ., Beijing, China

fYear

2011

fDate

20-23 Feb. 2011

Firstpage

321

Lastpage

324

Abstract

We present a novel type of surface enhanced Raman scattering (SERS)-active substrates based on nanoscale metallic cracks formed on the surface of polydimethylsiloxane (PDMS). Compared with Raman spectral signals of Rhodamine B (RB) solutions on flat metal/PDMS surfaces without the nanocracks, the nanocrack regions on this SERS-active substrates have an enhancement factor on the order of 4×10⁶. Moreover, with photolithography and “lift-off” techniques, metals might be patterned on the PDMS layer; and by bending the PDMS layer along certain directions, SERS-active substrates based on patterned metallic nanocracks are achievable. Such SERS-active substrates may be integrated into micro-fluidic systems for further wide range of applications.

Keywords

cracks; nanostructured materials; photolithography; polymers; surface enhanced Raman scattering; RB solution; Raman spectral signal; Rhodamine B; SERS-active substrate; lift-off technique; metal-PDMS surface; metallic nanocrack; nanocrack region; nanoscale metallic crack; photolithography; polydimethylsiloxane; surface enhanced Raman scattering; Metals; Raman scattering; Rough surfaces; Substrates; Surface morphology; Surface roughness; Surface treatment; “Lift-off”; FDTD; Metallic nanocracks; PDMS; Photolithography; Surface enhanced Raman scattering;

fLanguage

English

Publisher

ieee

Conference_Titel

Nano/Micro Engineered and Molecular Systems (NEMS), 2011 IEEE International Conference on

Conference_Location

Kaohsiung

Print_ISBN

978-1-61284-775-7

Type

conf

DOI

10.1109/NEMS.2011.6017358

Filename

6017358