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1. Revisiting the supplementary relationship of dynamic contact angles measured by sessile-droplet and captive-bubble methods: Role of surface roughness

Author:
Sarkar, Sreya; Roy, Tamal; Roy, Ankit; Moitra, Shashwata; Ganguly, Ranjan; Megaridis, Constantine M.
Source:
Journal of colloid and interface science 2021 v.581 pp. 690-697
ISSN:
0021-9797
Subject:
surface roughness,   etc   ; bubbles; contact angle; droplets; geometry; hysteresis; prediction; roughness; thermodynamic models; wettability;     Show all 10 Subjects
Abstract:
... Hypothesis: Quantitative characterization of surface wettability through contact angle (CA) measurement using the sessile droplet (SD) or captive bubble (CB) methods is often limited by the intrinsic wetting properties of the substrate. Situations may arise when an extreme surface wettability may preclude using one of the two methods for predicting the behaviors of droplets or bubbles on the surfa ...
DOI:
10.1016/j.jcis.2020.07.098

2. Nanoscale wear of hard materials: An overview

Author:
Colaço, Rogério; Serro, Ana Paula
Source:
Current opinion in colloid & interface science 2020 v.47 pp. 118-125
ISSN:
1359-0294
Subject:
surface roughness,   etc   ; materials; nanotechnology;     Show all 3 Subjects
Abstract:
... Wear of nanoelectromechanical systems (NEMS)/microelectromechanical systems (MEMS) involves a limited number of superficial atomic layers. In larger components, where tolerances and surface roughness are usually quite small, wear also occurs essentially in a narrow near-surface region, with not more than few hundreds nanometres. Therefore, in general, macromechanical approaches to wear are not str ...
DOI:
10.1016/j.cocis.2020.01.001

3. Spherical probes for simultaneous measurement of rotational and translational diffusion in 3 dimensions

Author:
Ilhan, Beybin; Schoppink, Jelle J.; Mugele, Frieder; Duits, Michael H.G.
Source:
Journal of colloid and interface science 2020 v.576 pp. 322-329
ISSN:
0021-9797
Subject:
surface roughness,   etc   ; anisotropy; colloids; crystallization; silica; solvents;     Show all 6 Subjects
Abstract:
... Real time visualization and tracking of colloidal particles with 3D resolution is essential for probing the local structure and dynamics in complex fluids. Although tracking translational motion of spherical particles is well-known, accessing rotational dynamics of such particles remains a great challenge. Here, we report a novel approach of using fluorescently labeled raspberry-like colloids with ...
DOI:
10.1016/j.jcis.2020.05.026

4. Effect of surface roughness on capillary force during particle-wall impaction under different humidity conditions

Author:
Li, Xue; Dong, Ming; Zhang, Huang; Li, Sufen; Shang, Yan
Source:
Powder technology 2020 v.371 pp. 244-255
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; cameras; liquids; relative humidity;     Show all 4 Subjects
Abstract:
... Surface roughness is the key factor to influence the normal restitution coefficient between particle-wall collision. In addition, surface roughness will reduce the formation of liquid bridge under humid conditions which are strongly related to the value of the capillary force. In this study, both experimental and theoretical analysis are presented to explore the effect of surface roughness on the ...
DOI:
10.1016/j.powtec.2020.05.053

5. Nucleation and Growth of a Nanobubble on Rough Surfaces

Author:
Maheshwari, Shantanu; van Kruijsdijk, Cor; Sanyal, Suchismita; Harvey, Albert D.
Source:
Langmuir 2020 v.36 no.15 pp. 4108-4115
ISSN:
1520-5827
Subject:
surface roughness,   etc   ; molecular dynamics; nanobubbles; simulation models;     Show all 4 Subjects
Abstract:
... We study the nucleation and growth of a nanobubble on rough surfaces using molecular dynamics simulations. A nanobubble nucleates and grows by virtue of a heterogeneous surface reaction which results in the production of gas molecules near the surface. We study the role of surface roughness in the nucleation and growth behavior of a nanobubble. We perform simulations at various reaction rates and ...
DOI:
10.1021/acs.langmuir.0c00635

6. Effect of roughness-regulated migration and distribution of particles on the structural evolution of flowing polymer blends

Author:
Xiang, Siying; Qiao, Yunjiao; Mao, Chaoying; Huang, Yajiang; Kong, Miqiu; Yang, Qi; Li, Guangxian
Source:
Colloids and surfaces 2020 v.589 pp. 124454
ISSN:
0927-7757
Subject:
surface roughness,   etc   ; droplets; emulsifiers; emulsions; polymers;     Show all 5 Subjects
Abstract:
... We report that the surface roughness of solid particles plays a crucial role in determining their migration and distribution within flowing polymer blends as well as their regulation ability toward the blend morphology. During slow shearing, smooth particles exhibit remarkable accumulation at the droplet/matrix interface while the rough ones prefer to locate within the droplets uniformly. As a res ...
DOI:
10.1016/j.colsurfa.2020.124454

7. An effective parallelization algorithm for DEM generalization based on CUDA

Author:
Wu, Qianjiao; Chen, Yumin; Wilson, John P.; Liu, Xuejun; Li, Huifang
Source:
Environmental modelling & software 2019 v.114 pp. 64-74
ISSN:
1364-8152
Subject:
surface roughness,   etc   ; algorithms; landscapes;     Show all 3 Subjects
Abstract:
... An effective parallelization algorithm based on the compute-unified-device-architecture (CUDA) is developed for DEM generalization that is critical to multi-scale terrain analysis. It aims to efficiently retrieve the critical points for generating coarser-resolution DEMs which maximally maintain the significant terrain features. CUDA is embedded into a multi-point algorithm to provide a parallel-m ...
DOI:
10.1016/j.envsoft.2019.01.002

8. Effect of particle surface corrugation on colloidal interactions

Author:
Kämäräinen, Tero; Tardy, Blaise L.; Javan Nikkhah, Sousa; Batys, Piotr; Sammalkorpi, Maria; Rojas, Orlando J.
Source:
Journal of colloid and interface science 2020 v.579 pp. 794-804
ISSN:
0021-9797
Subject:
surface roughness,   etc   ; colloids; energy; mixing; molecular models; nanoparticles; surface area;     Show all 7 Subjects
Abstract:
... Production of corrugated particles generally introduces several morphological heterogeneities, such as surface roughness and local variations in the corrugation pattern, which are known from model system studies to significantly alter the colloidal interaction energy. Thus, realistic particle morphologies need to be investigated and compared to simple model shapes to yield insights into how intera ...
DOI:
10.1016/j.jcis.2020.06.082

9. A review on recent development of minimum quantity lubrication for sustainable machining

Author:
Hamran, N.N. Nor; Ghani, J.A.; Ramli, R.; Haron, C.H. Che
Source:
Journal of cleaner production 2020 v.268 pp. 122165
ISSN:
0959-6526
Subject:
surface roughness,   etc   ; additives; air; cooling; cutting; databases; lubrication; temperature;     Show all 8 Subjects
Abstract:
... Achieving sustainable machining is in demand nowadays and it is in line with the rise of global eco-awareness and rigorous regulations by the authorities to prevent from further damaging the environment and its constituents. One of the sustainable solutions extensively explored over the years is machining with minimum quantity lubrication system. Nevertheless, there is still room to improve this s ...
DOI:
10.1016/j.jclepro.2020.122165

10. Morphological effect and conductivity tunability of different regions in a single graphene film by surface steps

Author:
Sandeepa Lakshad Wimalananda, Maddumage Don; Kim, Jae-Kwan; Lee, Ji-Myon
Source:
Carbon 2020 v.165 pp. 1-8
ISSN:
0008-6223
Subject:
surface roughness,   etc   ; Raman spectroscopy; copper; electrical properties; graphene; roughness; temperature;     Show all 7 Subjects
Abstract:
... Surface step is a fascinating aspect of chemical vapor-deposited graphene. Although the Cu surface steps influence graphene nucleation, they limit the domain expansion at lower temperatures. In this study, we report surface steps and nanoscale surface roughness that can be used to control the electrical properties of two regions in the same graphene film. Higher processing temperatures such as 100 ...
DOI:
10.1016/j.carbon.2020.04.023

11. Fundamental limitations in transferred CVD graphene caused by Cu catalyst surface morphology

Author:
Huet, Benjamin; Raskin, Jean-Pierre; Snyder, David W.; Redwing, Joan M.
Source:
Carbon 2020 v.163 pp. 95-104
ISSN:
0008-6223
Subject:
surface roughness,   etc   ; catalysts; copper; graphene; mechanical stress; vapors;     Show all 6 Subjects
Abstract:
... The transfer of large-area graphene is a critical step in the development of technological applications, particularly when its structural integrity and physical properties are of central importance. While the scientific community dedicated a great deal of efforts improving the scalability and cleanliness of the transfer protocol, less research focused on the fundamental mechanisms responsible for ...
DOI:
10.1016/j.carbon.2020.02.074

12. Wearable Temperature Sensors with Enhanced Sensitivity by Engineering Microcrack Morphology in PEDOT:PSS–PDMS Sensors

Author:
Yu, Yuyan; Peng, Shuhua; Blanloeuil, Philippe; Wu, Shuying; Wang, Chun H.
Source:
ACS applied materials & interfaces 2020 v.12 no.32 pp. 36578-36588
ISSN:
1944-8252
Subject:
surface roughness,   etc   ; acid treatment; adhesion; monitoring; sulfuric acid; temperature;     Show all 6 Subjects
Abstract:
... Wearable temperature sensors with high sensitivity, linearity, and flexibility are required to meet the increasing demands for unobtrusive monitoring of temperature changes indicative of the onset of infections and diseases. Herein, we present a new method for engineering highly sensitive and flexible temperature sensors made by sandwiching a poly(3,4-ethylenedioxythiophene):polystyrene (PEDOT:PSS ...
DOI:
10.1021/acsami.0c07649

13. A simple multiple centrifugation method for large-area homogeneous perovskite CsPbBr₃ films with optical lasing

Author:
Lu, Chang-Gui; Hu, Xue-Fang; Xu, Shu-Hong; Liu, Hong-Gui; Xu, Jing-Kun; Cui, Yi-Ping; Wang, Chun-Lei
Source:
RSC advances 2020 v.10 no.43 pp. 25480-25486
ISSN:
2046-2069
Subject:
surface roughness,   etc   ; annealing; bromides; centrifugation; cesium; chlorides; evaporation; iodides; solvents;     Show all 9 Subjects
Abstract:
... Large scale cesium lead-halide (CsPbX₃, X = Cl, Br, and I) perovskite films have become the basis of laser applications. Common fabrication methods such as spin-coating and thermal evaporation have a trade-off between high quality and low cost. Herein, we reported a facile method for preparing a large area homogeneous perovskite CsPbBr₃ film via a multiple centrifugal deposition and solvent anneal ...
DOI:
10.1039/d0ra04259e

14. Strength and failure modes of surface treated CFRP secondary bonded single-lap joints in static and fatigue tensile loading regimes

Author:
Park, Seong-Min; Roy, Rene; Kweon, Jin-Hwe; Nam, Youngwoo
Source:
Composites 2020 v.134 pp. 105897
ISSN:
1359-835X
Subject:
surface roughness,   etc   ; carbon fibers; composite materials; energy; fatigue strength; polymers;     Show all 6 Subjects
Abstract:
... Adherend surface treatment prior to bonding is pivotal for efficient assembly or repair of carbon fiber reinforced polymer (CFRP) composites. The effect of CFRP surface treatment has gathered much attention in the literature but reported test results on fatigue performance are less prevalent. The effect of surface treatment was extended in this work to cover the static and also fatigue strength of ...
DOI:
10.1016/j.compositesa.2020.105897

15. Role of surface roughness in the wettability, surface energy and flotation kinetics of calcite

Author:
Wang, Xianchen; Zhang, Qin
Source:
Powder technology 2020 v.371 pp. 55-63
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; calcite; energy; hydrophilicity; hydrophobicity; roughness; wettability;     Show all 7 Subjects
Abstract:
... The surface wettability and flotation dynamic characteristics of calcite are of great significance for separating it from other coexisting minerals, and the surface roughness plays an important role in the wettability and floatability of calcite particles. In this paper, the effect of roughness on the wettability, surface energy, and flotation kinetics of calcite were investigated. Results indicat ...
DOI:
10.1016/j.powtec.2020.05.081

16. Investigation on the influence of surface roughness on magnetite flotation from the view of both particle-particle and bubble-particle interactions

Author:
Zhu, Zhanglei; Yin, Wanzhong; Han, Huili; Cao, Shaohang; Yang, Bin; Wang, Donghui
Source:
Colloids and surfaces 2020 v.595 pp. 124681
ISSN:
0927-7757
Subject:
surface roughness,   etc   ; atomic force microscopy; energy; light microscopy; magnetite; models;     Show all 6 Subjects
Abstract:
... It is well known that surface roughness of mineral particles has a significant influence on their flotation behaviors. In this investigation, magnetite was ground in rod and ball mills to generate particles with similar dimension and shape but varying degree of surface roughness, which was quantified using Atomic Force Microscopy (AFM). The influence of surface roughness on the floatability of mag ...
DOI:
10.1016/j.colsurfa.2020.124681

17. Hourglass-Shaped Microfibers

Author:
Shi, Rui; Tian, Ye; Zhu, Pingan; Tang, Xin; Tian, Xiaowei; Zhou, Chunmei; Wang, Liqiu
Source:
ACS applied materials & interfaces 2020 v.12 no.26 pp. 29747-29756
ISSN:
1944-8252
Subject:
surface roughness,   etc   ; dehumidification; encapsulation; engineering; ethanol; oils; separation;     Show all 7 Subjects
Abstract:
... Heterotypic microfibers have been recognized as promising building blocks for the multifunctionality demanded in various fields, such as environmental and biomedical engineering. We present a novel microfluidics-based technique to generate bio-inspired microfibers with hourglass-shaped knots (named hourglass-shaped microfibers) via the integration of a non-solvent-induced phase separation (NIPS) p ...
DOI:
10.1021/acsami.0c04824

18. Optical transmission spectra study in visible and near-infrared spectral range for identification of rough transparent plastics in aquatic environments

Author:
Kanyathare, Boniphace; Asamoah, Benjamin O.; Ishaq, Umair; Amoani, James; Räty, Jukka; Peiponen, Kai-Erik
Source:
Chemosphere 2020 v.248 pp. 126071
ISSN:
0045-6535
Subject:
surface roughness,   etc   ; absorption; aquatic environment; light; microplastics; refractive index; transmittance;     Show all 7 Subjects
Abstract:
... Erosion of microplastics due to residence time in aquatic environments causes roughening of the microplastic. Unfortunately, currently used measurement methods do not provide information on the surface roughness of the microplastic embedded in water. In this study we propose a novel method by using transmittance to get information on the magnitude of the surface roughness of microplastics and to r ...
DOI:
10.1016/j.chemosphere.2020.126071

19. Gaseous flow through coarse granular beds: The role of specific surface area

Author:
Buchwald, Thomas; Schmandra, Gregor; Schützenmeister, Lieven; Fraszczak, Tony; Mütze, Thomas; Peuker, Urs
Source:
Powder technology 2020 v.366 pp. 821-831
ISSN:
0032-5910
Subject:
surface roughness,   etc   ; equations; image analysis; microscopy; models; surface area;     Show all 6 Subjects
Abstract:
... The Ergun equation is commonly used to predict velocity-pressure drop behaviour in packed beds. For many particular systems, the measurements deviate significantly from this relationship. Because of this, the equation is often treated as a purely empirical relationship, and its factors as fit parameters.This paper shows that the physics-based model underlying the Ergun equation should be treated b ...
DOI:
10.1016/j.powtec.2020.03.028

20. Electrostatic Shielding Guides Lateral Deposition for Stable Interphase toward Reversible Magnesium Metal Anodes

Author:
Wang, Jiahe; Zhao, Wanyu; Dou, Huanglin; Wan, Bingxin; Zhang, Yijie; Li, Wanfei; Zhao, Xiaoli; Yang, Xiaowei
Source:
ACS applied materials & interfaces 2020 v.12 no.17 pp. 19601-19606
ISSN:
1944-8252
Subject:
surface roughness,   etc   ; anodes; cations; electrochemistry; interphase; lithium; magnesium;     Show all 7 Subjects
Abstract:
... Compared with lithium, magnesium shows a low propensity toward dendritic deposition due to its low surface self-diffusion barriers. However, due to the intrinsic surface roughness of the metal and the nonuniformity of the formed solid–electrolyte interphase, uneven deposition of Mg still happens, which brings about high local current density and continuous proliferation of the interphase, greatly ...
DOI:
10.1021/acsami.0c03603