Biofunctionalization of Metal Surface by Immobilization of Poly(Ethylene Glycol) Terminated Amine


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In many biomedical devices such as catheters and diagnostic sensors, blood compatibility is required. The best way to control this property is to prevent or drastically reduce the adsorption of proteins. Poly(ethylene glycol) terminated amine at both terminals, NH2-PEG-NH2, is immobilized on a commercially pure titanium, a 316L austenitic stainless steel, and a cobalt-chromium-molybdenum alloy with immersion or electrodeposition. Chemical bonding states at the interface and orientation of PEG molecules were characterized using X-ray photoelectron spectroscopy, glow discharge optical emission spectroscopy, and Fourie-transformed infrared spectrometer with a reflection absorption spectrometer. As a result, NH2-PEG-NH2 was immobilized onto metal surface as a U-shape mainly with stable NHO bonding in electrodeposition. In the case of electrodepostion, the concentration of active surface hydroxyl groups on surface oxide film played an important role in the immobilization.



Advanced Materials Research (Volumes 26-28)

Edited by:

Young Won Chang, Nack J. Kim and Chong Soo Lee




Y. Tanaka et al., "Biofunctionalization of Metal Surface by Immobilization of Poly(Ethylene Glycol) Terminated Amine ", Advanced Materials Research, Vols. 26-28, pp. 765-768, 2007

Online since:

October 2007




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100 200 300 400 500 600 cp-Ti SS Co-Cr-Mo Concentration of active hydroxyl groups, N act-OH / nm−2.

[2] [4] [6] [8] [10] [12] [14] [16] cp-Ti SS Co-Cr-Mo Thickness of PEG layer, d / nm Electrodeposition Immersion Fig. 7. Thickness of the NH2-PEG-NH2 layer on cp-Ti, SS and Co-Cr-Mo immobilizaed with electrodeposition and immersion.