Surface Tension of Asphalt

Jarek Drelich

Jaroslaw Drelich

A collaboration with Prof. Zhanping You and his PhD student, Lingyun You, from Civil Engineering Department brought Prof. Drelich back to his research with bitumens and asphalts, research he conducted at the University of Utah during his PhD and postdoctoral fellow programs. The objective of this new collaboration at Michigan Tech was to characterize the rheology and structural properties of asphalt using molecular dynamics. In molecular dynamics work, using Amber-Cornell Force-Field, the previously proposed 12-component asphalt model was used by Lingyun You to evaluate the surface tension and structure at the atomistic level of asphalt at different temperatures. The success of this study was that the surface tension of asphalt can be predicted from the molecular dynamics models. The summary of this study is published in the Proceedings of the RILEM International Symposium on Bituminous Materials. The title of the article is Understanding of Structural and Surface Tension Properties of Asphalt Model Using Molecular Dynamics Simulation.

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Emily Graduates

Emily Tom

Congratulations to Emily Tom! She successfully defended her M.S. Thesis entitled Exploring Rapid Solidification and Equal Channel Angular Pressing in the Fabrication of Mg-based Alloys for Medical Applications.

The development of magnesium bioresorbable implants has become increasingly popular due to the increased need for temporary implants and magnesium’s excellent biocompatibility and suitable elastic modulus. Even though magnesium is an excellent candidate, when alloyed with other metals magnesium’s corrosion rate becomes too rapid for bioresorbable medical applications. The investigation into novel processing techniques to control the formation of precipitates to improve mechanical strength and ductility as well as corrosion rates has become of interest. Emily investigated the combination of two nonequilibrium processing techniques, rapid solidification (RS) and equal channel angular pressing (ECAP), and the effects it has on the strength, ductility, and corrosion properties of two Mg-Zn-Ca-Mn alloys: Mg-1.2Zn-0.8Ca-0.2Mn and Mg-1.8Zn-0.8Ca-0.2Mn. In the course of this study, she found that the formulated alloys possessed flaws from processing responsible for a premature mechanical failure of samples. As the result, alloys’ ductility improvements from processing could not be explored. Additionally, ECAP processing caused the dynamic precipitation of nano-size Ca2Mg6Zn3 precipitates which contributed to an increase in strength from the RS consolidated state after ECAP was performed. Corrosion testing also determined that ECAP caused an increase in corrosion rate of formulated alloys.

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Biological effects of Zn

H&E histology

Our collaborator from Brock University in Canada, Prof. Jeffrey A. Stuart, investigated biological effects of Zn-based stent materials. His research team identified mitochondria as an important target of zinc that is differently affected in the vascular endothelial and smooth muscle cells. This new finding is important for better understanding how zinc-based implants affect tissue homeostasis in vivo. The summary of this study is published in the Biomaterials and Biosystems journal in the article entitled Bioabsorbable Metal Zinc Differentially Affects Mitochondria in Vascular Endothelial and Smooth Muscle Cells. The paper is co-authored by Prof. Jeremy Goldman and Prof. Jaroslaw Drelich.

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SI Volume 9 Issue 5

Surface Innovations Journal

Surface Innovations, the journal

In this closing issue of 2021 (Issue 5) we offer seven original research reports on antimicrobial coating, magnetic membranes, photocatalytic nanoparticles, the use of iron phosphide as an energy-storage material, low-reflectivity coating for surgical instrumentation, inhibitor of corrosion, and the use of expired medication in lithium-based batteries:

Novel nanostructured and antimicrobial PVDF-HFP/PVP/MoO3 composite; Urška Gradišar Centa, Meta Sterniša, Bojana Višić, Žiga Federl, Sonja Smole Možina, Maja Remškar; pp. 256–266
Fabrication of homogeneous magnetic PDMS membranes to mediate cell behavior; Berkay Erenay, Bora Garipcan, Sedat Odabaş; pp. 267–276
One-pot green synthesis of Ag@AgCl nanoparticles with excellent photocatalytic performance; Xiaoyan Guo, Sakil Mahmud, Xiaomin Zhang, Ningya Yu, K M Faridul Hasan; pp. 277–284
Hierarchical carbon-coated FeP derived from FeOOH with enhanced sodium-storage performance; Xiaofeng Liu, Wenbo Zhang, Shaoyong Zhong, Mengke Zhang, Shuo Tao, Jianru Ma, Lizhi Li, Wendi Zhang, Xiangyun Xie, Jianmin Zhang, Dan Li; pp. 285–292
Detailed study of the electrochemical behavior of low-reflectivity TiAlN coatings; Hernán D Mejía V., Aida M Echavarría, Gilberto Bejarano G.; pp. 293–307
Synergistic effect of inhibitor mixture based on enhanced electron transfer; Peng Han, Xiuzhi Wang, Xing Yang, Chenyang Xu, Fei Du, Liqing Shi, Ruiping Liu, Liying Song, Junqing Zhang, Lei Zhang; pp. 308–316
The recycling of expired aminocaproic acid injection for mint-leaf-like zinc aminocaproate; Hongying Hou, Jian Lan, Yuan Yao, Kun Meng, Baoxiang Huang, Hao Li; pp. 317–323

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SI Volume 9 Issue 4

Surface Innovations Journal

Surface Innovations, the journal

We would like to share with you the content of the issue 4 of 2021 of Surface Innovations. In this fourth issue, we offer a leading Invited Feature Article on formulation and characterization of bioactive coatings on magnesium alloys using the plasma electrolytic oxidation method and six original technical contributions on topics related to surface nanostructures for optical, optoelectronic, electrical, and catalytic devices, wetting of superhydrophobic patterns and anti-wear coatings:

The effect of PEO parameters on the properties of biodegradable Mg alloys: a review; Mehdi Esmaeili, Mehran Tadayonsaidi, Babak Ghorbanian; pp. 184–198
Fabrication of novel pyramid-textured and nanostructured Cu2O/Si heterojunctions; Ji Ma, Zhiwei Wang, Hao Qi, Peng Pan, Xianzhong Lang, Zuming He, Bin Tang, Jiangbin Su; pp. 199–206
Nanosized Si space-confined in 3D porous Cu as anode for high-performance lithium storage; Jiamin Wang, Zhijia Zhang, Shihao Sun, Shen Yuan, Weijie Li, Zhijun Qiao, Zhenyang Yu, Jianli Kang; pp. 207–213
Porous nanocrystalline WO3 thin films: fabrication, electrical and optical properties; Zhiwei Wang, Jiangbin Su, Hao Qi, Peng Pan, Meiping Jiang; pp. 214–221
Carbon- and oxygen-doped hexagonal boron nitride for degradation of organic pollutants; Feng Liu, Rui Han, Andrew Nattestad, Xudong Sun, Zhenguo Huang; pp. 222–230
Thermodynamic analysis of hydrophobic property of a circular truncated cone microtexture; Xin Sui, Yongyang Sun, Wenyan Liang, Yubo Wang; pp. 231–242
Effect of CeO2 concentration on the microstructure and wear behavior of Co–WC composites; Ya-gang Zhang, Wan-chang Sun, Min Ma, Yu-wan Liu, Sha-sha Tian, Yan Xiao; pp. 243–253

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Liquid Adhesion to Curved Surface

Water Droplet on Solid

In our new report on adhesion of liquids to solids, entitled “Droplet Characteristics at the Maximum Adhesion on Curved Surfaces” and published in Langmuir, we analyze the effect of solid surface curvature on liquid droplet adhesion. The following is the abstract:
For applications involving droplet detachment from solid surfaces, it is vital to study the droplet characteristics (e.g., contact angle and base width) when the droplet is experiencing the maximum force that detaches the droplet (maximum adhesion state). Historically, such investigations were mainly conducted on flat 2-dimenional surfaces and the characteristics on curved surfaces with third dimension remain unknown. Thus, the generalized description of such characteristics has not been established yet. Here, by vertically pulling liquid droplets using a microbalance, we study the droplet characteristics at the maximum adhesion on curved homogeneous surfaces. Variables in this study include liquid surface tension, initial droplet base area, and the asymmetry in solid surface curvature. Results show that the contact angle is identical everywhere along the droplet perimeter on curved surfaces irrespective of the asymmetry in surface curvature because the surface curvature is a macroscopic parameter that cannot affect the contact angle, which is determined by surface microscopic properties. In addition, we found the droplet base is non-axisymmetric (not circular) at the maximum adhesion, opposing previous understanding that was formulated for flat surfaces. As a result, we propose a more generalized and quantitative description of the droplet characteristics at the maximum adhesion, derived from the component of the surface tension force acting along the droplet perimeter.

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SI Volume 9 Issue 2/3

Surface Innovations Journal

Surface Innovations, the journal

We would like to share with you the content of the issue 2/3 of 2021 of Surface Innovations. This issue offers the Invited Feature Article on carbon coating of electrode materials for lithium ion batteries and eight original papers on variety of topics. Hope many of you will find something interesting among these nine quality papers.
Carbon coating of electrode materials for lithium-ion batteries; Andrey B Yaroslavtsev, Irina A Stenina; 9(2-3), pp. 92–110
Machine-learning methods to predict the wetting properties of iron-based composites; Amir Kordijazi, Hathibelagal M Roshan, Arushi Dhingra, Marco Povolo, Pradeep K Rohatgi, Michael Nosonovsky; 9(2-3), pp. 111–119
Structure and properties of the CoCuTiZrHf coating obtained by the HVOF method; Peter Rusinov, Zhesfina Blednova; 9(2-3), pp. 120–126
Structural behavior and mechanical properties of high-entropy coatings synthesized by HVOF; Peter Rusinov, Zhesfina Blednova; 9(2-3), pp. 127–138
Use of m-BiVO4/ZnFe2O4 composite materials for enhanced photocatalytic properties; Aiqiong Ma, Yunqin Gao, Dian Zhang, Xing Hou; 9(2-3), pp. 139–148
Density functional theory study of perfluorooctane sulfonate adsorption on fluorinated graphene; Laibao Liu, Liangliang Wu, Run Zhang, Lihua Zhang, Jialiang Hou, Chenghua Sun, Yunsheng Zhang, Youhong Tang, Hongping Zhang; 9(2-3), pp. 149–155
Electrospun PVDF-Ag@AgCl porous fiber membrane: stable antifoul and antibacterial surface; Ying Tian, You Shu, Xiaomin Zhang, Sakil Mahmud, Jin Zhu, Shengpei Su; 9(2-3), pp. 156–165
In situ preparation of antibacterial Ag particles on Ti6Al4V surfaces by spray deposition; Yaoxin Li, Dexin Chen, YinYing Sheng, Wei Li, Xiaojian Wang; 9(2-3), pp. 166–173
Preparation, characterisation and biocompatibility of microarc oxidation coating on tantalum; Quan-ming Zhao, Xiao-hui Ni, Xing-yuan Zhu, Xiao-dong Liu, Lu Zhang, Zhi-yong Zhang, Liu-bao Ren, Jun-yi Wang, Lei Yi; 9(2-3), pp. 174–181

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SI Volume 9 Issue 1

Surface Innovations Journal

Surface Innovations, the journal

We would like to share with you the content of the first issue of 2021 of Surface Innovations. This issue offers the Invited Feature Article on polyhedral oligomeric silsesquioxane/epoxy coatings and seven original papers on variety of topics. Hope many of you will find something interesting among these eight quality papers.

Polyhedral oligomeric silsesquioxane/epoxy coatings: a review; F. Seidi, M. Jouyandeh, A. Taghizadeh, M. Taghizadeh, S. Habibzadeh, Y. Jin, H. Xiao, P. Zarrintaj, M.R. Saeb; 9(1), pp. 3–16
Enhanced dielectric properties of flexible Cu/polymer nanocomposite films; A. Atta; 9(1), pp. 17–24
Wool functionalization through AgNPs: coloration, antibacterial and wastewater treatment; K.M.F. Hasan, H. Wang, S. Mahmud, M.A. Taher, C. Genyang; 9(1), pp. 25–36
Rational design of CoNi alloy and atomic Co/Ni composite as an efficient electrocatalyst; J. Huo, L. Lu, Z. Shen, H. Gao, H. Liu; 9(1), pp. 37–48
Novel approach to enhancing remineralization of tooth surface by magnetic field exposure; M.I. El-Kaliuoby, R. Hamouda, A.M. El-Khatib; 9(1), pp. 49–56
Controllable crystallization by way of solvent engineering for perovskite solar cells; H. Cai, J. Yang, X. Ye, J. Su, J. Ni, J. Li, J. Zhang; 9(1), pp. 57–64
Surface plasma treatment (Ar/CF4) decreases biofouling on polycarbonate surfaces; F. Faÿ, F. Poncin-Epaillard, T. Le Norcy, I. Linossier, K. Réhel; 9(1), pp. 65–76
Functional properties of metallocomplexes with glucamine moiety/Ctab micellar systems; M.R. Ibatullina, E.P. Zhiltsova, S.S. Lukashenko, I.R. Nizameev, A.D. Voloshina, A.S. Sapunova, O.A. Lenina, M.K. Kadirov, L.Y. Zakharova; 9(1), pp. 77–87

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Top Scientist

Jarek Drelich

Jaroslaw Drelich

A new citation metrics was recently prepared by Mendeley; Mendeley is a free reference manager and an academic social network. They have created a publicly available database of 100,000 top-scientists (actual list is longer, ~160,000) that provides standardized information on citations, h-index, co-authorship adjusted hm-index, citations to papers in different authorship positions and a composite indicator. Separate data are shown for career-long and single year impact. Metrics with and without self-citations and ratio of citations to citing papers are given. Scientists are classified into 22 scientific fields and 176 sub-fields that include all disciplines of science, engineering and medicine. Field- and subfield-specific percentiles are also provided for all scientists who have published at least 5 papers. Mandeley ranks scientists in two categories: career-long and single-year citation. Career-long data are updated to end-of-2019.
Prof. Drelich is well recognized in both categories. He is ranked as number 7,818 (top ~0.1%) in the world, with only one other researcher/scientist from Michigan Tech that is listed ahead of Prof. Drelich. Regarding career-long category, he is already among the top 31,000 in the world (which makes him top 0.4-0.5%) due to his publications under the Science Metrix category of Physics & Astronomy, and two subfields of this category including Chemical Physics and Biomedical Engineering. There is only one active person from Michigan Tech, who is listed ahead of him.
This world-wide climbing of Prof. Drelich’s name reflects the quality of his team members and directions toward advanced materials and surfaces, biomedical engineering and his expertise in wetting phenomena. Many of his former and current students, postdoctoral fellows and collaborators contributed to this recognition.

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Depinning Contact Line

Water Droplet on Solid

The mobility of a fakir state droplet on a structured surface is fundamentally determined by the effective length of a microscopic contact line. However, it is largely unknown how the surface topography determines the effective contact line length. Based on the direct measurement of droplet adhesion force and the visualization of contact line, our work, published in Physical Review Letters under the title “Topography-Dependent Effective Contact Line in Droplet Depinning“, shows that effective contact line length is topography-dependent as opposed to prior notion. On pored surfaces, contact line is not distorted, and the effective length approaches the droplet apparent perimeter regardless of pore dimensions. On pillared surfaces, the distortion of contact line is significantly dependent on the packing density of the pillar structures so that the effective length is as small as a pillar diameter on densely-packed pillars and as large as a pillar perimeter on sparsely-packed pillars, while changing linearly between the two extremes.
This paper is the result of our long-standing collaboration with Prof. Chang-Hwan Choi fromthe Stevens Institute of Technology.

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