NEXAFS and XPS studies of VUV/O3 treated aromatic polyurea for high-speed electrophoresis microchips

Author

Shinohara, H. ; Nakahara, A. ; Shoji, S. ; Mizuno, J. ; Takahashi, Y. ; Kitagawa, F. ; Otsuka, K. ; Ohara, O.

Author_Institution

Fac. of Sci. & Eng., Waseda Univ., Tokyo, Japan

fYear

2011

fDate

20-23 Feb. 2011

Firstpage

1267

Lastpage

1271

Abstract

This research studies on VUV/O₃-treated aromatic polyurea film from near-edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) spectra. These spectra indicate that the benzene ring was cleaved after the treatment, and carboxyl and hydroxyl groups were formed at the cleaved sites. The VUV/O₃-treated polyurea was applied to polymethylmethacrylate (PMMA) microchip for microchip electrophoresis (MCE) of bovine serum albumin (BSA). Fast electroosmotic mobility of 4.6×10^-4 cm²V^-1s^-1 was realized as well as reduction of the BSA adhesion. This functional surface is useful for high speed MCE analysis.

Keywords

electrophoresis; microfluidics; polymers; BSA; NEXAFS; PMMA microchip; VUV/O₃; X-ray photoelectron spectroscopy; XPS; aromatic polyurea; benzene ring; bovine serum albumin; carboxyl group; electroosmotic mobility; high-speed electrophoresis microchip; hydroxyl group; microchip electrophoresis; near-edge X-ray absorption fine structure; polymethylmethacrylate; Absorption; Adhesives; Films; Microchannel; Polymers; Spectroscopy; Surface treatment; X-ray photoelectron spectroscopy; microchip electrophoresis; near-edge X-ray absorption fine structure; polyurea; vacuum ultraviolet;

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.2011.6017588

Filename

6017588