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Kumar, Raman,Kim, Hansung,Umapathi, Reddicherla,Yadav, Ompal Singh,Singh, Gurmeet Elsevier 2018 Journal of molecular liquids Vol.268 No.-
<P><B>Abstract</B></P> <P>A new environmental-friendly imine compound viz. 4-(2-amino-3-methylphenyl)imino)methyl)benzaldehyde (AMIB) was sustainably synthesized at room temperature utilizing green solvents, reagents and assessed as an anti-corrosion catalyst for the commercially important mild steel (MS) alloy subjected to highly aggressive 0.5 M sulphuric acid (H<SUB>2</SUB>SO<SUB>4</SUB>) solution by several electrochemical methods (polarization techniques and Electrochemical impedance spectroscopy) allied with various surface characterization techniques such as attenuated total reflectance (ATR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS) and atomic force microscopy (AFM). Furthermore, the experimental results were theoretically supplemented by density functional theory (DFT) treatment. AMIB delivered significant corrosion protection even at very low concentrations and at various temperatures. The findings from electrochemical and surface characterization techniques were also supplemented by temperature kinetics study. The adsorption mechanism of AMIB molecules on metal substrate follow Langmuir's adsorption isotherm. The overall corrosion mitigation mechanism assessed from various techniques and methods was found to be comprehensive in nature. The present study may pave the way for combating corrosion with this cost effective and eco-friendly strategy.</P> <P><B>Highlights</B></P> <P> <UL> <LI> AMIB has been synthesized in green solvents at room temperature. </LI> <LI> Sustainable inhibition behavior has been observed for mild steel (MS) Corrosion. </LI> <LI> Significant inhibition efficiency has been achieved at a very low concentration (1 mM). </LI> <LI> Substantial corrosion mitigation performance has been observed at high temperatures. </LI> <LI> The MS surface has been protected via comprehensive adsorption. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Oh, Hyo-Jun,Umapathi, Reddicherla,Omelianovych, Oleksii,Dao, Van-Duong,Jeong, Jun-Kyo,Lee, Ga-Won,Choi, Ho-Suk Elsevier S.A. 2019 Thin Solid Films Vol.676 No.-
<P><B>Abstract</B></P> <P>Dry plasma reduction under atmospheric pressure is a unique approach for stably, continuously, easily, and uniformly fabricating Ag layer on the metal seeds-polyethylene terephthalate (PET) substrate. In this study, effects of particle size, surface uniformity, surface coverage, and film thickness of metal seeds such as Ag, Cu, Fe and Ni on the formation of uniform Ag layer were studied on the basis of their surface free energies and critical radius, which further leads to variations in the sheet resistance levels of the silver layers. The root mean square roughness and sheet resistance of the Ag layer PET substrate were decreased with the deposition of metal seeds. Among the added seed metals, Ni seed has shown best uniformity. Furthermore, the fabricated films were applied for electromagnetic interference (EMI) shielding. Among the added seed metals, Ni has shown the highest electromagnetic interference shielding effectiveness. The present study will be useful for the development of various low-cost metal films in the field of EMI shielding.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Uniform silver layer successfully fabricated with the aid of dry plasma reduction. </LI> <LI> Fabricated films were applied as electromagnetic interference shielding materials. </LI> <LI> Surface of silver layer formed more smoothly and uniformly by applying metal seeds. </LI> <LI> The findings may be useful for the development of various low-cost metal films. </LI> </UL> </P>