scholarly journals Electrochemical nanoarchitectonics through polyaminobenzylamine–dodecyl phosphate complexes: redox activity and mesoscopic organization in self-assembled nanofilms

2018 ◽  
Vol 20 (11) ◽  
pp. 7570-7578 ◽  
Author(s):  
Agustín Lorenzo ◽  
Waldemar A. Marmisollé ◽  
Eliana M. Maza ◽  
Marcelo Ceolín ◽  
Omar Azzaroni
Keyword(s):  
Aqueous Solutions ◽  
Redox Activity ◽  
Self Assembled

Hydrophobic stratified mesostructured films of amino-appended polyaniline and alkyl-phosphates present stable intrinsic electroactivity in neutral aqueous solutions.

scholarly journals Internal Nanoparticle Structure of Temperature-Responsive Self-Assembled PNIPAM-b-PEG-b-PNIPAM Triblock Copolymers in Aqueous Solutions: NMR, SANS, and Light Scattering Studies

Langmuir ◽  
2016 ◽  
Vol 32 (21) ◽  
pp. 5314-5323 ◽  
Author(s):  
Sergey K. Filippov ◽  
Anna Bogomolova ◽  
Leonid Kaberov ◽  
Nadiia Velychkivska ◽  
Larisa Starovoytova ◽  
...  
Keyword(s):  
Light Scattering ◽  
Aqueous Solutions ◽  
Triblock Copolymers ◽  
Temperature Responsive ◽  
Self Assembled ◽  
Nanoparticle Structure

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.

Self-assembled systems of water soluble metal 8-hydroxyquinolates with surfactants and conjugated polyelectrolytes

2016 ◽  
Vol 18 (25) ◽  
pp. 16629-16640 ◽  
Author(s):  
Hugh D. Burrows ◽  
Telma Costa ◽  
M. Luisa Ramos ◽  
Artur J. M. Valente ◽  
Beverly Stewart ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Light Harvesting ◽  
Water Soluble ◽  
Conjugated Polyelectrolytes ◽  
Self Assembled

Self-assembled fluorescent systems with potential in sensing and light harvesting are formed by mixing 8-hydroxyquinoline-5-sulfonate, metal ions and cationic conjugated electrolytes in aqueous solutions.

Sensitive and selective ratiometric fluorescent detection of monosaccharides in aqueous solutions at physiological pH using self-assembled peptides with different aromatic side chains

2017 ◽  
Vol 41 (7) ◽  
pp. 2593-2603 ◽  
Author(s):  
Lok Nath Neupane ◽  
Pramod Kumar Mehta ◽  
Keun-Hyeung Lee
Keyword(s):  
Aqueous Solutions ◽  
The Self ◽  
Fluorescent Detection ◽  
Side Chains ◽  
Self Assembled ◽  
Aromatic Side Chains

The control of disassembly of supramolecular nanostructures of the self-assembled peptides by monosaccharides was investigated for the fluorescent detection of monosaccharides in aqueous solutions.

Structural, Viscoelastic, and Electrochemical Characteristics of Self-Assembled Amphiphilic Comblike Copolymers in Aqueous Solutions

2017 ◽  
Vol 121 (4) ◽  
pp. 867-875 ◽  
Author(s):  
Malika Talantikite ◽  
Kahina Aoudia ◽  
Lazhar Benyahia ◽  
Lila Chaal ◽  
Christophe Chassenieux ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Electrochemical Characteristics ◽  
Self Assembled

scholarly journals Self-assembled poly(2-ethyl-2-oxazoline) fibers in aqueous solutions

2012 ◽  
Vol 3 (2) ◽  
pp. 322-324 ◽  
Author(s):  
Pınar Tatar Güner ◽  
Annamária Mikó ◽  
Florian F. Schweinberger ◽  
A. Levent Demirel
Keyword(s):  
Aqueous Solutions ◽  
Self Assembled
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