scholarly journals Electrochemical and wetting behavior of as-cast Sn-Zn-Sb lead free solders alloys

2013 ◽  
Vol 67 (3) ◽  
pp. 477-484 ◽  
Author(s):  
Srba Mladenovic ◽  
Ljubica Ivanic ◽  
Mirjana Rajcic-Vujasinovic ◽  
Svetlana Ivanov ◽  
Dragoslav Guskovic
Keyword(s):  
Contact Angle ◽  
Open Circuit Potential ◽  
Sessile Drop ◽  
Copper Substrate ◽  
Open Circuit ◽  
Ternary Alloys ◽  
Induction Melting ◽  
Potential Measurement ◽  
Wetting Contact Angle ◽  
Lead Free Solders

Ternary alloys SnZn12Sb8, SnZn10Sb10, SnZn8Sb12, SnZn6Sb14, and SnZn2Sb18 were prepared by induction melting. Electrochemical behavior and wetting (contact angle) of prepared as-cast samples were investigated using open circuit potential measurement and sessile drop technique. The results of electrochemical investigation show that open-circuit potential, few seconds after immersing of electrodes, shifts toward more negative values, indicating a relatively smaller rate of dissolution during the spontaneous dissolution process under the curentless conditions. After that period, the values of potential tend to be constant with time. It was found that all investigated alloys have poor wettability on copper substrate and the contact angle values decrease with increasing superheat temperature.

scholarly journals Reduced graphene oxide-polyaniline film as enhanced sensing interface for the detection of loop-mediated-isothermal-amplification products by open circuit potential measurement

RSC Advances ◽  
2018 ◽  
Vol 8 (45) ◽  
pp. 25361-25367 ◽  
Author(s):  
Vu Thi Thu ◽  
Bui Quang Tien ◽  
Dau Thi Ngoc Nga ◽  
Ly Cong Thanh ◽  
Le Hoang Sinh ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Open Circuit Potential ◽  
Open Circuit ◽  
Isothermal Amplification ◽  
Potential Measurement ◽  
Polyaniline Film ◽  
Loop Mediated Isothermal Amplification ◽  
Disposable Sensor ◽  
Reduced Graphene

A novel disposable sensor based on reduced graphene oxide-polyaniline (rGO-PANi) for detection of loop-mediated-isothermal-amplification (LAMP) products.

Study on the swelling kinetics of superabsorbent using open circuit potential measurement

2008 ◽  
Vol 44 (3) ◽  
pp. 743-754 ◽  
Author(s):  
Xiaohua Qi ◽  
Mingzhu Liu ◽  
Zhenbin Chen ◽  
Fen Zhang
Keyword(s):  
Open Circuit Potential ◽  
Open Circuit ◽  
Swelling Kinetics ◽  
Potential Measurement ◽  
Kinetics Of

Role of titanium on the reactive spreading of lead-free solders on alumina

2006 ◽  
Vol 21 (12) ◽  
pp. 3222-3233 ◽  
Author(s):  
Laurent Gremillard ◽  
Eduardo Saiz ◽  
Velimir R. Radmilovic ◽  
Antoni P. Tomsia
Keyword(s):  
Contact Angle ◽  
Sessile Drop ◽  
Triple Line ◽  
Contact Angles ◽  
Liquid Interface ◽  
Liquid Front ◽  
Wide Variability ◽  
Solid Liquid Interface ◽  
Lead Free Solders ◽  
Solid Liquid

The wetting of Sn3Ag-based alloys on Al2O3 has been studied using the sessile-drop configuration. Small additions of Ti decrease the contact angle of Sn3Ag alloys on alumina from 115° to 23°. Adsorption of Ti-species at the solid–liquid interface prior to reaction is the driving force for the observed decrease in contact angle, and the spreading kinetics is controlled by the kinetics of Ti dissolution into the molten alloy. The addition of Ti increases the transport rates at the solid–liquid interface, resulting in the formation of triple-line ridges that pin the liquid front and promote a wide variability in the final contact angles.

Label-Free Detection of Protein interactions with peptide aptamers by open circuit potential measurement

2008 ◽  
Vol 53 (22) ◽  
pp. 6489-6496 ◽  
Author(s):  
Pedro Estrela ◽  
Debjani Paul ◽  
Peng Li ◽  
Simon D. Keighley ◽  
Piero Migliorato ◽  
...  
Keyword(s):  
Protein Interactions ◽  
Open Circuit Potential ◽  
Open Circuit ◽  
Label Free ◽  
Peptide Aptamers ◽  
Potential Measurement ◽  
Label Free Detection

scholarly journals Polymer-Templated Durable and Hydrophobic Nanostructures for Hydrogen Gas Sensing Applications

Polymers ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 4470
Author(s):  
Mohammad Kamal Hossain ◽  
Qasem Ahmed Drmosh
Keyword(s):  
Contact Angle ◽  
Surface Area ◽  
Gas Adsorption ◽  
Sessile Drop ◽  
Gas Sensing ◽  
Hydrogen Gas ◽  
Adsorption Sites ◽  
Wetting Contact Angle ◽  
Sensing Applications ◽  
Surface Nanostructures

A simple and hands-on one-step process has been implemented to fabricate polymer-templated hydrophobic nanostructures as hydrogen gas sensing platforms. Topographic measurements have confirmed irregular hills and dips of various dimensions that are responsible for creating air bubble pockets that satisfy the Cassie–Baxter state of hydrophobicity. High-resolution field-emission scanning electron microscopy (FESEM) has revealed double-layer structures consisting of fine microscopic flower-like structures of nanoscale petals on the top of base nanostructures. Wetting contact angle (WCA) measurements further revealed the contact angle to be ~142.0° ± 10.0°. Such hydrophobic nanostructures were expected to provide a platform for gas-sensing materials of a higher surface area. From this direction, a very thin layer of palladium, ca. 100 nm of thickness, was sputtered. Thereafter, further topographic and WCA measurements were carried out. FESEM micrographs revealed that microscopic flower-like structures of nanoscale petals remained intact. A sessile drop test reconfirmed a WCA of as high as ~130.0° ± 10.0°. Due to the inherent features of hydrophobic nanostructures, a wider surface area was expected that can be useful for higher target gas adsorption sites. In this context, a customized sensing facility was set up, and H2 gas sensing performance was carried out. The surface nanostructures were found to be very stable and durable over the course of a year and beyond. A polymer-based hydrophobic gas-sensing platform as investigated in this study will play a dual role in hydrophobicity as well as superior gas-sensing characteristics.

Influence of purine on copper behavior in neutral and alkaline sulfate solutions

2012 ◽  
Vol 66 (7) ◽  
Author(s):  
Marija Petrović ◽  
Ana Simonović ◽  
Milan Radovanović ◽  
Snežana Milić ◽  
Milan Antonijević
Keyword(s):  
Potentiodynamic Polarization ◽  
Open Circuit Potential ◽  
Copper Surface ◽  
Open Circuit ◽  
Copper Corrosion ◽  
Solution Ph ◽  
Potential Measurement ◽  
Inhibition Effect ◽  
Langmuir Adsorption ◽  
Sulfate Solutions

AbstractThe effect of purine (concentration range of 1.00 × 10−6–1.00 × 10−2 M) on the behavior of copper in a 0.5 M Na2SO4 solution (pH 7 and pH 9) was studied using the open circuit potential measurement, potentiodynamic polarization, and chronoamperometry. Potentiodynamic polarization shows that purine acts as a copper corrosion inhibitor in both alkaline and neutral sulfate solutions. The efficiency of inhibition increases as the purine concentration increases. Chronoamperometric results follow the same trend as the results of potentiodynamic polarization. The inhibition effect can also be observed visually by microscopic examination of the electrode surface. Purine is adsorbed on copper surface according to the Langmuir adsorption isotherm.

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