Summary.
A photoreactive polymer containing thiocyanate (SCN) groups was employed for the immobilization of gold nanoparticles (AuNP). Upon UV illumination, isothiocyanate (NCS) groups are generated at the surface by photoisomerization. The illuminated areas of the polymer layer containing NCS were selectively modified with 2-aminoethanethiol to give SH terminated thiourea units at the surface. Gold nanoparticles were selectively immobilized in these areas by immersing the polymer surface in a colloidal solution of gold nanoparticles stabilized by citric acid. Depending on the time of immersion, different amounts of gold were deposited on the illuminated areas, while no immobilization of AuNP was observed in the non-illuminated areas. By using photolithographic masks, patterned gold structures (μm scale) were produced on the polymer surface.
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Weinberger, M., Rentenberger, S. & Kern, W. Selective Immobilization of Gold Nanoparticles on the Surface of a Photoreactive Polymer. Monatsh. Chem. 138, 309–314 (2007). https://doi.org/10.1007/s00706-007-0608-3
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DOI: https://doi.org/10.1007/s00706-007-0608-3