Photo-responsive spiropyran monolayer protected gold nanorod

Dyes and Pigments, Volume 103, April 2014, Pages 89-94. 

Jingjing Cao, Shuaifan Wu, Baoqi Zhai, Qiaochun Wang, Jing Li, Xiang Ma.

Key Labs for Advanced Materials and Institute of Fine Chemicals, East China University of Science & Technology, Shanghai 200237, PR China.

 

Abstract

 

The spiropyran monolayer covalently protected gold nanorod (GNR) hybrid was prepared and well characterized for the first time, which was stable, soluble and photo-responsive under certain light irradiation in organic solvent. The photochromism of the densely packed spiropyran monolayer on the surface of GNRs was found having effect on the surface plasmonic resonance (SPR) absorption of gold nanorods, namely inducing the intensity change of the two plasma absorption peaks at 786 and 551 nm of the GNR hybrids. The functionalization of this organic-inorganic GNR hybrid and the photo-tuning of its SPR absorption properties, especially in the not only UV–Vis range but also near-infrared (NIR) spectral area would make important and interesting sense in the area of functional hybrid nanomaterial.

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spiropyran monolayer covalently protected gold nanorod

 

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