Ruthenium Complex Containing Block Copolymer For the Enhancement of Carbon Nanotube Photoconductivity
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- 作者：Chi Ho Li ; Alan Man Ching Ng ; Chris S. K. Mak ; Aleksandra B. Djuri拧i膰 ; Wai Kin Chan
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2012
- 出版时间：January 25, 2012
- 年：2012
- 卷：4
- 期：1
- 页码：74-80
- 全文大小：365K
- 年卷期：v.4,no.1(January 25, 2012)
- ISSN：1944-8252
文摘
We report the synthesis of a multifunctional block copolymer incorporated with pyrene and ruthenium terpyridyl thiocyanato complex moieties by reversible addition鈥揻ragmentation chain transfer polymerization. The pyrene block in the copolymer facilitates the dispersion of multiwalled carbon nanotubes in DMF solution because of the strong 蟺鈥撓€ interaction between the pyrene moieties and nanotube surface. On the other hand, the ruthenium complexes greatly enhance the photosensitivity of the functionalized nanotubes in the visible region. The photocurrent responses of the nanotubes at different wavelength measured by conductive AFM spectrum strongly agree with the absorption spectrum of the ruthenium complex. The results demonstrate a new and versatile approach in enhancing and fine-tuning the photosensitivity or other opto-electronic properties of carbon nanotubes by multifunctional block copolymers.