scholarly journals Electroless deposition of metallic silver from a choline chloride-based ionic liquid: a study using acoustic impedance spectroscopy, SEM and atomic force microscopy

2007 ◽  
Vol 9 (28) ◽  
pp. 3735 ◽  
Author(s):  
Andrew P. Abbott ◽  
Satvinder Nandhra ◽  
Stella Postlethwaite ◽  
Emma L. Smith ◽  
Karl S. Ryder
Keyword(s):  
Atomic Force Microscopy ◽  
Ionic Liquid ◽  
Impedance Spectroscopy ◽  
Acoustic Impedance ◽  
Electroless Deposition ◽  
Choline Chloride ◽  
Metallic Silver ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Effect of water on the electroresponsive structuring and friction in dilute and concentrated ionic liquid lubricant mixtures

2020 ◽  
Vol 22 (48) ◽  
pp. 28191-28201
Author(s):  
Georgia A. Pilkington ◽  
Rebecca Welbourn ◽  
Anna Oleshkevych ◽  
Seiya Watanabe ◽  
Patricia Pedraz ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Ionic Liquid ◽  
Neutron Reflectivity ◽  
Force Microscopy ◽  
Liquid Lubricant ◽  
Effect Of Water ◽  
Atomic Force ◽  
Ambient Levels

The influence of ambient levels of water on the electroresponsive interfacial structuring and nanofriction of ionic liquid lubricant mixtures has been investigated by neutron reflectivity and atomic force microscopy.

scholarly journals Electroresponsive structuring and friction of a non-halogenated ionic liquid in a polar solvent: effect of concentration

2020 ◽  
Vol 22 (34) ◽  
pp. 19162-19171 ◽  
Author(s):  
Georgia A. Pilkington ◽  
Anna Oleshkevych ◽  
Patricia Pedraz ◽  
Seiya Watanabe ◽  
Milad Radiom ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Ionic Liquid ◽  
Solvent Effect ◽  
Polar Solvent ◽  
Neutron Reflectivity ◽  
Force Microscopy ◽  
Frictional Properties ◽  
Atomic Force

Neutron reflectivity and atomic force microscopy results reveal the electroresponsive interfacial structuring and nano-frictional properties of ionic liquid (IL) lubricant mixtures with a polar solvent are strongly dependent on bulk IL concentration.

scholarly journals Mismatch detection in DNA monolayers by atomic force microscopy and electrochemical impedance spectroscopy

2016 ◽  
Vol 7 ◽  
pp. 220-227 ◽  
Author(s):  
Maryse D Nkoua Ngavouka ◽  
Pietro Capaldo ◽  
Elena Ambrosetti ◽  
Giacinto Scoles ◽  
Loredana Casalis ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Electrochemical Impedance Spectroscopy ◽  
Impedance Spectroscopy ◽  
Electrochemical Impedance ◽  
Complementary Sequence ◽  
Single Base ◽  
Force Microscopy ◽  
Dna Monolayers ◽  
Atomic Force ◽  
The Difference

Background: DNA hybridization is at the basis of most current technologies for genotyping and sequencing, due to the unique properties of DNA base-pairing that guarantee a high grade of selectivity. Nonetheless the presence of single base mismatches or not perfectly matched sequences can affect the response of the devices and the major challenge is, nowadays, to distinguish a mismatch of a single base and, at the same time, unequivocally differentiate devices read-out of fully and partially matching sequences. Results: We present here two platforms based on different sensing strategies, to detect mismatched and/or perfectly matched complementary DNA strands hybridization into ssDNA oligonucleotide monolayers. The first platform exploits atomic force microscopy-based nanolithography to create ssDNA nano-arrays on gold surfaces. AFM topography measurements then monitor the variation of height of the nanostructures upon biorecognition and then follow annealing at different temperatures. This strategy allowed us to clearly detect the presence of mismatches. The second strategy exploits the change in capacitance at the interface between an ssDNA-functionalized gold electrode and the solution due to the hybridization process in a miniaturized electrochemical cell. Through electrochemical impedance spectroscopy measurements on extended ssDNA self-assembled monolayers we followed in real-time the variation of capacitance, being able to distinguish, through the difference in hybridization kinetics, not only the presence of single, double or triple mismatches in the complementary sequence, but also the position of the mismatched base pair with respect to the electrode surface. Conclusion: We demonstrate here two platforms based on different sensing strategies as sensitive and selective tools to discriminate mismatches. Our assays are ready for parallelization and can be used in the detection and quantification of single nucleotide mismatches in microRNAs or in genomic DNA.

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