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Type: Journal article
Title: Ruthenium Porphyrin Functionalized Single-Walled Carbon Nanotube Arrays: A Step Toward Light Harvesting Antenna and Multibit Information Storage
Author: Yu, J.
Mathew, S.
Flavel, B.
Johnston, M.
Shapter, J.
Citation: Journal of the American Chemical Society, 2008; 130(27):8788-8796
Publisher: Amer Chemical Soc
Issue Date: 2008
ISSN: 0002-7863
Statement of
Jingxian Yu, Simon Mathew, Benjamin S. Flavel, Martin R. Johnston and Joe G. Shapter
Abstract: Ruthenium porphyrin functionalized single-walled carbon nanotube arrays have been prepared using coordination of the axial position of the metal ion onto 4-aminopyridine preassembled single-walled carbon nanotubes directly anchored to a silicon(100) surface (SWCNTs-Si). The formation of these ruthenium porphyrin functionalized single-walled carbon nanotube array electrodes (RuTPP-SWCNTs-Si) has been monitored using infrared spectroscopy (IR), differential pulse voltammetry (DPV), atomic force microscopy (AFM), laser desorption time-of-flight mass spectroscopy (LDI-TOF-MS), UV-vis spectroscopy, fluorescence spectroscopy, and cyclic voltammetry. Electrochemical results show two successive one-electron reversible redox waves. The surface concentration of the ruthenium porphyrin molecules is 3.44 x 10 (-8) mol cm (-2). Optical results indicate that the immobilization of ruthenium porphyrin enhances the light absorption of SWCNTs-Si surfaces in the visible light region. Moreover mixed assembly of ferrocene/porphyrin onto carbon nanotube arrays has been achieved by altering the ratio of two redox-active species in the deposition solution. These results suggest the ruthenium porphyrin modified electrodes are excellent candidates for molecular memory devices and light harvesting antennae.
Rights: Copyright © 2008 American Chemical Society
RMID: 0020104131
DOI: 10.1021/ja801142k
Appears in Collections:Chemistry and Physics publications

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