Light-Induced Aggregation of Gold Nanoparticles and Photoswitching of Silicon Surface Potential

Mohammed Ikbal, Dora Balogh, Evgeniy Mervinetsky, Ruthy Sfez, Shlomo Yitzchaik*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Hybrid nanomaterials having tunable properties that can be reversibly conducted by external stimuli, in a particular light, are of great importance since they enable synergetic behavior between their components and enable the design of stimuli responsive "smart" materials and surfaces. Here we describe the formation of organic-inorganic hybrid nanoparticles that photochemically aggregate and their effect on the electronic properties of a semiconducting surface, as a function of external irradiation. The inorganic component consists of 3 nm gold nanoparticles while the organic component is a covalently attached, photochromic spiropyran derivative. Aggregation/deaggregation patterns in solution were obtained and analyzed by UV-vis spectroscopy and transmission electron microscopy upon photoswitching. The assembly of spiropyran-modified gold nanoparticles on an Si/SiO2 surface proved useful in phototuning the electronic properties of semiconductors measured by contact potential difference.

Original languageAmerican English
Pages (from-to)27176-27181
Number of pages6
JournalJournal of Physical Chemistry C
Volume121
Issue number48
DOIs
StatePublished - 7 Dec 2017

Bibliographical note

Publisher Copyright:
© 2017 American Chemical Society.

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