Title :
Enhanced gold SERS signals on HSR surface extrutions generated on carboxyl-rich polystyrene beads
Author :
Hsieh, Hsin-Yi ; Wang, Pen-Cheng ; Xiao, Jian-Long ; Lee, Chau-Hwang ; Tseng, Fan-Gang
Author_Institution :
Inst. of NanoEngineering & Microsyst. (NEMS), Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
This paper reports the employment of carboxyl groups on polystyrene beads surface to generate high aspect ratio (HSR) nano-extrutions by plasma etching for enhancing SERS signal. We investigate the detail mechanism of the surface corrugation formation on PSBs and propose a novel method to produce HSR surface nano-extrutions on carboxyl-rich PSBs surface. By understanding the mechanism of the surface corrugation formation, we can control the HSR. Therefore, a 4-fold Raman signal enhancement was achieved when compared to the result by previous method, using oxygen plasma to generate corrugation surface on PSBs without carboxyl groups.
Keywords :
extrusion; gold; nanofabrication; nanostructured materials; polymers; sputter etching; surface enhanced Raman scattering; Au; HSR surface extrusion; PSB; Raman signal enhancement; carboxyl-rich polystyrene beads; enhanced gold SERS signal; high aspect ratio nanoextrusion; plasma etching; surface enhanced Raman scattering; Corrugated surfaces; Etching; Plasmas; Surface morphology; Surface roughness;
Conference_Titel :
Micro Electro Mechanical Systems (MEMS), 2011 IEEE 24th International Conference on
Conference_Location :
Cancun
Print_ISBN :
978-1-4244-9632-7
DOI :
10.1109/MEMSYS.2011.5734407
