Maria Anita Rampi
Università di Ferrara
Maria Anita Rampi studied chemistry at the University of Bologna and is Professor of Chemistry at the University of Ferrara, where she teaches Inorganic Chemistry and Chemistry of Nanostructured Materials. She has been interested in i) photochemistry and photophysics of supramolecular systems, ii) photoinduced in energy and electron transfer processes in supramolecular Donor-Bridge-Acceptors (D-B-A)systems both in solution and in self assembled monolayers on solid surfaces, and more recently iii) electron-transfer processes in molecular junctions. For several years she has been visiting professor at the Max Plank Insitute in Goettingen, and presently at Harvard University.
- V. Cantale, F.C. Simeone, R. Gambari, M.A. Rampi, "Gold nano-islands on FTO as plasmonic nanostructures for biosensors" SENSORS AND ACTUATORS B-CHEMICAL, 2011; 152 (2): 206-213
- F. C. Simeone, M. A. Rampi, "Test-beds for Molecular Electronics: Metal-Molecules-Metal Junctions Based on Hg Electrodes" CHMIA, 2010, 6 (64): 362-369.
- V. Cantale, F. C. Simeone, R. Gambari, M. A. Rampi, “FTO as Substrate for Gold Plasmonic Nanostructures: Towards Bio-sensors” Sensors and Actuator A, 2010 in press
- N. Tuccitto, V. Ferri, M. Cavazzini, S. Quici, G. Zhavnerko, A. Licciardello, M. A. Rampi “Highly Conductive 40-nm Long Molecular Wires Assembled by Stepwise Incorporation of Metal Centres”, Nature Materials, 2009, 8, 41-46.
- E. Tran, A. Cohen, R. Murray, M.A. Rampi, G.M.Whitesides ” Redox Site-Mediated Charge Transport in a Hg-SAM//Ru(NH3)63+/2+//SAM-Hg Junction with a Dynamic Interelectrode Separation. Compatibility with Redox Cycling and Electron Hopping Mechanisms” J. Am. Chem. Soc., 2009, 131, 2141-2150.
- V. Ferri, M. Elbing, G. Pace, M. D. Dickey, M. Zharnikov, P. Samorì, M. Mayor, M. A. Rampi, Light-powered Electrical Switch Based on Cargo Lifter Azobenzene SAMs Angew. Chem. Int. Engl. Ed. 2008, 47, 3407-3409.
- M. Elbing, A. Blaszczyk, C. von Hänisch, M. Mayor, V. Ferri, C. Grave, M. A. Rampi, G. Pace, P. Samorì, A. Shaporenko, M. Zharnikov “Single Component Self-Assembled Monolayers of Aromatic Azo-biphenyl: Influence of the Packing Tightness on the SAM Structure and Light Induced Molecular Movements” Adv. Funct. Mat. 2008, 19, 2972-2983.
- J. M. Mativetsky, G. Pace, M. Elbing, M. A. Rampi, M. Mayor, P. Samorì “Azobenzenes as Light-controlled Molecular Electronic Switches in Nanoscale Metal-Molecule-Metal Junctions” J. Am. Chem. Soc. 2008, 130, 9192-9193.
- G. Pace, V. Ferri, C. Grave, M. Elbing, M. Zharnikov, M. Major, M. A. Rampi, P. Samorì “ Cooperative Light-induced Molecular Movements of Highly Ordered Azobenzene Self-assembled Monolayers”, Proc. Nat. Acc. Science, 2007, 104, 9937-9942.
A new family of photoswitchable semiconducting organic compounds
Over the past decade, great progress has been made on organic thin-film transistors (OTFTs) with impressive achievements in improving carrier mobilities that are now comparable to those of amorphous silicon thin-film transistors. OTFT performance can be substantially enhanced by manipulating the electronic properties of the semiconductor. Therefore, a rational design of organic semiconductors can lead (i) to improvement of the device performance and/or (ii) to install new functionalities into OTFTs, essential to boost development.
Inspired by the complex molecular machines found in nature, chemists have developed organic molecular machines and switches that have been used to perform electrical switching. Among these, azobenzene is one of the most studied, as unique system able to perform a reversible trans–cis photoisomerization coupled with a molecular movement. As a matter of fact, Rampi et al. by using a nanoscopic molecular junctions incorporating self assembled monolayers (SAMs) of azobenzene has recently demonstrated that, under “in situ” irradiation, the system, as a consequence of the trans-cis photoisomerization, performs two functions: 1) photoiduced electrical switch and ii) light triggered cargo lifter.
In collaboration with Mateo-Alonso, it is intended to develop new azobenzene compounds with enhanced conductivity for electronic applications.