Langmuir–Blodgett Film Formation of a Fullerene Dicarboxylic Acid Derivative C60(HOOCCHNHCHCOOH) and its Photocurrent Generation
✍ Scribed by Yanyi Huang; Yilei Zhao; Liangbing Gan; Chun-Hui Huang; Nianzu Wu
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 122 KB
- Volume
- 204
- Category
- Article
- ISSN
- 0021-9797
No coin nor oath required. For personal study only.
✦ Synopsis
ods in forming high-quality uniform and ordered thin films The Langmuir films of a fullerene dicarboxylic acid derivative I, (18). This method has been widely used for investigation of C 60 (HOOCCHNH 2 CHCOOH)CF 3 SO 3 H (FDA), at the air/water pure fullerene, fullerene/calix[8]arene and fullerene/CdS interface have been investigated. FDA formed a stable monolayer complexes, and fullerene derivatives (9-16). In most cases, on pure water when dilute solution (1.04 1 10 05 mol/L) was used only multilayers were obtained at the air/water interface.
as the spreading solution. The monolayer formation on various
The fullerenes and their derivatives were found to aggregate subphases was investigated, including solutions containing differeasily. It was also found that if hydrophilic oxygen or nitroent monovalent (Na / , Ag / ) and divalent (Ca 2/ , Cd 2/ , Cu 2/ ) gen containing groups were introduced onto the sphere of cations. The introduction of these cations makes the monolayer fullerenes, the stability and transferability of the monolayers more stable. The limiting molecular area is also dependent on the pH of the subphase. The surface pressure versus area isotherms could be enhanced remarkably (11)(12)(13)(14)(15)(16).
at different temperature clearly indicate that FDA molecules easily
In the present work we report the Langmuir film formation aggregate at high temperature. The monolayer and multilayer LB of a dicarboxylic C 60 derivative ( 19) and the effects of films of FDA were deposited on quartz and glass substrates from spreading solutions, temperature, pH value, and various cat-Ca 2/ , Cd 2/ , Cu 2/ , or Cu 2/ /Phen solution subphase, and their ions in the subphase. The photocurrent generation of its UV-vis and XPS spectra were obtained. The data showed that monolayer modified ITO electrode and the factors influencfor Cd 2/ and Cu 2/ /Phen subphase the cation can be transferred ing the photocurrent are also reported such as the bias, gas onto the substrates together with FDA but not the other two. The atmosphere, wavelength, and electron acceptor. photoelectrochemical behavior of FDA on an ITO electrode was investigated, which showed that the photocurrent is cathodic. Oxygen and negative bias are beneficial factors for the photocurrent MATERIALS AND METHODS generation. The external quantum yield is ca. 4%.