Electrostatically Self-assembled Multilayers of Novel Symmetrical Rigid-Rod Polyanionic and Polycationic Polythiophenes on ITO/Glass and Gold Electrodes

2004 ◽  
Vol 16 (11) ◽  
pp. 2091-2100 ◽  
Author(s):  
Gianni Zotti ◽  
Sandro Zecchin ◽  
Gilberto Schiavon ◽  
Barbara Vercelli ◽  
Anna Berlin ◽  
...  
Keyword(s):  
Gold Electrodes ◽  
Ito Glass ◽  
Rigid Rod ◽  
Self Assembled

Photocurrent generation in peptide-based self-assembled monolayers on gold electrodes

2009 ◽  
Vol 46 (1-2) ◽  
pp. 34-39 ◽  
Author(s):  
Emanuela Gatto ◽  
Lorenzo Stella ◽  
Chiara Baldini ◽  
Claudio Toniolo ◽  
Fernando Formaggio ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Gold Electrodes ◽  
Photocurrent Generation ◽  
Assembled Monolayers ◽  
Self Assembled

Study of the size and separation of pinholes in the self-assembled thiol-porphyrin monolayers on gold electrodes

2008 ◽  
Vol 516 (18) ◽  
pp. 6476-6482 ◽  
Author(s):  
Xiaoquan Lu ◽  
Huiqing Yuan ◽  
Guofang Zuo ◽  
Jiandong Yang
Keyword(s):  
The Self ◽  
Gold Electrodes ◽  
Self Assembled

scholarly journals Redox-Active Monolayers Self-Assembled on Gold Electrodes—Effect of Their Structures on Electrochemical Parameters and DNA Sensing Ability

Molecules ◽  
2020 ◽  
Vol 25 (3) ◽  
pp. 607 ◽  
Author(s):  
Kamila Malecka ◽  
Shalini Menon ◽  
Gopal Palla ◽  
Krishnapillai Girish Kumar ◽  
Mathias Daniels ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Transition Metal ◽  
Redox Activity ◽  
Gold Electrodes ◽  
Complex Structures ◽  
Transfer Coefficients ◽  
Sensing Properties ◽  
Redox Active ◽  
Electrochemical Parameters ◽  
Self Assembled

The background: The monolayers self-assembled on the gold electrode incorporated transition metal complexes can act both as receptor (“host” molecules) immobilization sites, as well as transducer for interface recognitions of “guest” molecules present in the aqueous solutions. Their electrochemical parameters influencing the sensing properties strongly depend on the transition metal complex structures. The objectives: The electrochemical characterization of the symmetric terpyridine–M2+–terpyridine and asymmetric dipyrromethene–M2+–terpyridine complexes modified with ssDNA probe covalently attached to the gold electrodes and exploring their ssDNA sensing ability were the main aims of the research presented. The methods: Two transition metal cations have been selected: Cu2+ and Co2+ for creation of redox-active monolayers. The electron transfer coefficients indicating the reversibility and electron transfer rate constant measuring kinetic of redox reactions have been determined for all SAMs studied using: Cyclic Voltammetry, Osteryoung Square-Wave Voltammetry, and Differential Pulse Voltammetry. All redox-active platforms have been applied for immobilization of ssDNA probe. Next, their sensing properties towards complementary DNA target have been explored electrochemically. The results: All SAMs studied were stable displaying quasi-reversible redox activity. The linear relationships between cathodic and anodic current vs. san rate were obtained for both symmetric and asymmetric SAMs incorporating Co2+ and Cu2+, indicating that oxidized and reduced redox sites are adsorbed on the electrode surface. The ssDNA sensing ability were observed in the fM concentration range. The low responses towards non-complementary ssDNA sequences provided evidences for sensors good selectivity. The conclusions: All redox-active SAMs modified with a ssDNA probe were suitable for sensing of ssDNA target, with very good sensitivity in fM range and very good selectivity. The detection limits obtained for SAMs incorporating Cu2+, both symmetric and asymmetric, were better in comparison to SAMs incorporating Co2+. Thus, selection of the right transition metal cation has stronger influence on ssDNA sensing ability, than complex structures.

Electroactive Dipyrromethene−Cu(II) Self-Assembled Monolayers: Complexation Reaction on the Surface of Gold Electrodes

Langmuir ◽  
2008 ◽  
Vol 24 (19) ◽  
pp. 11239-11245 ◽  
Author(s):  
Iwona Szymańska ◽  
Magdalena Stobiecka ◽  
Czesława Orlewska ◽  
Taoufik Rohand ◽  
Dimitri Janssen ◽  
...  
Keyword(s):  
Self Assembled Monolayers ◽  
Gold Electrodes ◽  
Complexation Reaction ◽  
Assembled Monolayers ◽  
Self Assembled

Electrochemical Investigations of M-DNA Self-Assembled Monolayers on Gold Electrodes

2003 ◽  
Vol 107 (10) ◽  
pp. 2291-2296 ◽  
Author(s):  
Chen-Zhong Li ◽  
Yi-Tao Long ◽  
Heinz-Bernhard Kraatz ◽  
Jeremy S. Lee
Keyword(s):  
Self Assembled Monolayers ◽  
Gold Electrodes ◽  
Assembled Monolayers ◽  
Self Assembled
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