Article
Chemistry, Physical
Abhinav Naga, Anke Kaltbeitzel, William S. Y. Wong, Lukas Hauer, Hans-Jurgen Butt, Doris Vollmer
Summary: Researchers used an inverted laser scanning confocal microscope to study the collision between water drops and particles on a flat PDMS surface. They measured the lateral force acting on the drop during collision, established a criterion for particle attachment to the drop, and determined that low friction increases the likelihood of particle removal.
Article
Mechanics
Lei Xing, Shuai Guan, Minghu Jiang, Longlong Shi
Summary: In this study, the directional transportation of droplets on a surface with controllable wettability was investigated numerically. The mechanisms of directional migration and morphological evolution of droplets impacting on the superhydrophobic-hydrophobic interface were revealed, and the effects of the impacting position on the migration velocity, rebound height, and transport distance of droplets were analyzed. Theoretical models were derived for predicting the transport distance and rebound height of droplets. The simulation results showed different stages in the process of droplet impacting on the superhydrophobic-hydrophobic interface compared to a normal surface. The study also found the existence of an optimal adhesion length for maximizing the transport distance of the droplet. The results contribute to the fundamental theory of droplet directional migration and have practical applications.
Article
Chemistry, Multidisciplinary
Ahmed Aldhaleai, Peichun Amy Tsai
Summary: Ionic liquids play a crucial role in various applications, but there are limited studies on their interactions with solid surfaces. This study investigates the dynamic wetting and contact angles of ionic liquid droplets on hydrophobic microstructures. The results show that higher-viscosity ionic liquids exhibit larger contact angles with increasing contact line velocity. A model comparing the global surface energies agrees well with the observed wetting states. Molecular dynamic simulations successfully predict the experimental data and explain the dynamic wetting behavior.
Article
Chemistry, Physical
Jeong-Won Lee, Kihwan Kim, Giwon Ryoo, Jisu Kim, Jeyaraj Vinoth Kumar, Woonbong Hwang
Summary: A new SHPo/SHPi patterning method for three-dimensional objects using aluminum was proposed in this study, achieving successful realization of patterned surfaces with contact angles of 10 degrees for SHPi surface and 160 degrees for SHPo surface. This method enables patterning even in areas that laser light cannot reach, expanding the application scope of SHPo/SHPi surface patterning technique.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Lu Gong, Feiyi Wu, Wenshuai Yang, Charley Huang, Wenhui Li, Xiaogang Wang, Jianmei Wang, Tian Tang, Hongbo Zeng
Summary: The hydrophobic interactions of hydrocarbon and fluorinated surfaces with air bubbles in aqueous solutions were systematically and quantitatively measured. The experiment results show that the hydrophobic interactions were influenced by the presence of ethanol and the differences in interfacial hydrogen bonding network.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Thermodynamics
Abdullah Al-Sharafi, Bekir S. Yilbas, Ahmet Z. Sahin, H. Al-Qahtani
Summary: During the heating and stretching of the water droplet, necking of the droplet in the top plate region and elongated circulating structures in the vertical direction are observed. Additionally, the Nusselt number reaches large values prior to droplet stretching but decreases after stretching.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Materials Science, Multidisciplinary
Marielle Soniat, Frances A. Houle
Summary: Stable hydration is crucial for the conductivity and permeability of perfluorinated polyelectrolyte membranes like Nafion. The hydration of Nafion in water vapor is controlled by interfacial transport resistance, which is not slow diffusion across an interfacial layer but rather a competition between dehydration and rehydration. Computational studies reveal fluctuations in water distributions and interfacial kinetics.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Wenzhao Zhang, Jianzhou Wu, Lisha Yu, Hao Chen, Dan Li, Chaojie Shi, Liping Xiao, Jie Fan
Summary: By modifying the surface of hydrophilic zeolite gauze with a paraffin coating, a hydrophobic dressing, PZ-Gauze, was prepared to reduce adhesion and blood loss without compromising coagulation activity. Unlike traditional gauze procoagulant theories, the hydrophobic modification did not affect the procoagulant performance, demonstrating a new approach to improving wound dressings.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Ali Dhaini, Fadwa Alfadel Raad, Antoine Thill, Benedicte Prelot, Gaelle Martin-Gassin, Pierre-Marie Gassin
Summary: This research investigates the organization and interactions of Disperse Orange 3 (DO3) hydrophobic dye molecules within hybrid organic-inorganic imogolite nanotubes. In pure water, the DO3 dye molecules self assemble into large insoluble 2D nanosheets, whose structure is also explored by molecular dynamics simulations. However, the dye molecules are efficiently solubilized in the presence of hybrid imogolite nanotubes. The filling of the internal hydrophobic cavity of the nanotubes is quantified. The organization of the molecules inside the nanotube is probed using the polarization resolved second harmonic scattering (SHS) technique coupled with simulation. At the highest loading, the dyes fill the nanotube with their principal axis parallel to the nanotube walls, showing a strong SHS signal due to this encapsulation.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Construction & Building Technology
Anna Szymanska, Michal Dutkiewicz, Hieronim Maciejewski, Magdalena Palacz
Summary: This article presents an effective method for waterproofing concrete using functionalized polybutadienes, with evaluation on the impact of polymer structure and solvent type on the hydrophobicity of modified concrete. The impregnation effectiveness was assessed through water contact angle measurements and water sorption experiments, resulting in a reduction of water absorption by 94% for the best hydrophobizing preparation compared to unmodified samples.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Physical
Henmei Ni
Summary: This essay discusses the hydrophobic hydration of apolar gases, solubilities in water and hexadecane, and interfacial tensions at various interfaces. The main findings include the existence of two water layers of hydration, the ionization of water due to entropic changes, and the calculations of interfacial tensions and internal pressures.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Environmental Sciences
Jun-Ping Zhang, Jia-Qi Hou, Ming-Xiao Li, Tian-Xue Yang, Bei-Dou Xi
Summary: In this study, a novel and green process was developed to recycle food waste and prepare a biodegradable composite liquid mulching film. The prepared film showed excellent water vapor barrier properties, effectively preventing the loss of soil moisture and heat, and promoting seed germination.
ENVIRONMENTAL RESEARCH
(2022)
Article
Polymer Science
Liangpeng Zeng, Ziqi Liu, Jingliang Huang, Xiaolin Wang, Hui Guo, Wei-Hua Li
Summary: Recently invented hydrophobic hydrogels exhibit excellent anti-fouling ability, which is mainly attributed to their surface hydrophobicity, while excessive water content might be detrimental.
Article
Chemistry, Multidisciplinary
Lingyun Wu, Liang Gao, JiaMing Li, Tianyu Wu, Dongli Chen, Zhou Manxi, Gang Sui
Summary: An ultralight, low-cost and reusable hydrophobic aerogel of cellulose acetate/polyethylene oxide hybrid nanofibers was developed through thermal crosslinking and organosilicon modification, which has high absorption capacity, stable mechanical properties, greenness and economy for efficient removal and recovery of oil from wastewater.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Agriculture, Multidisciplinary
Mohamed Bayad, Henry Wai Chau, Stephen Trolove, Jim Moir, Leo Condron, Mohamed El Gharous
Summary: The study measured surface runoff and phosphorus concentrations on hydrophobic and wettable soils, confirming the impact of SWR on surface runoff and P mobility. It suggests that SWR may contribute to non-incidental phosphorus losses.
AGRICULTURE ECOSYSTEMS & ENVIRONMENT
(2022)
Article
Nanoscience & Nanotechnology
Yujin Lee, Eun-Ah You, Young-Geun Ha
ACS APPLIED MATERIALS & INTERFACES
(2018)
Article
Physics, Applied
Hye-Ran Byun, Eun-Ah You, Young-Geun Ha
APPLIED PHYSICS LETTERS
(2019)
Article
Chemistry, Physical
Hakan Usta, Dojeon Kim, Resul Ozdemir, Yunus Zorlu, Sanghyo Kim, M. Carmen Ruiz Delgado, Alexandra Harbuzaru, Seonhyoung Kim, Gokhan Demirel, Jongin Hong, Young-Geun Ha, Kilwon Cho, Antonio Facchetti, Myung-Gil Kim
CHEMISTRY OF MATERIALS
(2019)
Article
Chemistry, Physical
Kaitlin Lovering, Srikanth Nayak, Wei Bu, Ahmet Uysal
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Physical
Srikanth Nayak, Kaitlin Lovering, Wei Bu, Ahmet Uysal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2020)
Article
Nanoscience & Nanotechnology
Srikanth Nayak, Raju R. Kumal, Zhu Liu, Baofu Qiao, Aurora E. Clark, Ahmet Uysal
Summary: Liquid-liquid extraction is an effective technique for separating precious and rare metals, with the organizational structure of the organic phase being correlated with different local hydration effects that are independent of metal concentration.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Raju R. Kumal, Srikanth Nayak, Wei Bu, Ahmet Uysal
Summary: Ion adsorption and transfer at charged interfaces are crucial in industrial and environmental processes. This study investigates SeCN- adsorption on a floating charged monolayer, revealing that the orientation and coverage of SeCN- ions change with increasing KSeCN concentration. The reorganization of interfacial ions and water is important for chemical separations of heavy metals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Physics, Condensed Matter
Amanda J. Carr, Sang Soo Lee, Ahmet Uysal
Summary: In this paper, the electrical double layer (EDL) formed near graphene in dilute aqueous YCl3 solution is characterized using in situ high resolution x-ray reflectivity and resonant anomalous x-ray reflectivity techniques. The study reveals that yttrium ions (Y3+) readily adsorb to the negatively charged graphene surface to form an ion profile, and a molecular-scale gap is observed in the adsorbed Y3+ profile. Controlled adsorption and increasing cation coverage with increasing negative potential are also demonstrated. This experimental description provides important insights into the application of graphene-based systems for enhanced and selective ion separations.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Chemistry, Physical
Raju R. Kumal, Michael J. Servis, Pubudu N. Wimalasiri, Ahmet Uysal
Summary: Anions play important roles in the separation of lanthanides and actinides, but their behavior at aqueous interfaces is not well understood. This study used simulations to investigate the interfacial structure and behavior of thiocyanate anions at a charged interface, and found the emergence of a new population of thiocyanate ions at high concentrations.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Srikanth Nayak, Raju R. Kumal, Ahmet Uysal
Summary: This article investigates the ion-dependent reaction transformation process in rare earth metal separation technology. It is found that the introduction of specific ions can lead to the transformation of a monolayer into an inverted bilayer, providing insights for the development of new separation technologies. The study also reveals that temperature and the nature of background anions affect the transformation kinetics.
Article
Chemistry, Physical
Amanda J. Carr, Raju R. Kumal, Wei Bu, Ahmet Uysal
Summary: This study investigates the distribution of metal ions and water near graphene oxide films using interface-specific techniques. The results reveal that trivalent yttrium ions preferentially adsorb to graphene oxide and affect its structure, while divalent strontium and monovalent cesium ions have different effects. These findings provide fundamental information about the organization of ions and water at the interface and have relevance for improving graphene oxide membranes and applications downstream.
Article
Nanoscience & Nanotechnology
Amanda J. Carr, Seung Eun Lee, Raju R. Kumal, Wei Bu, Ahmet Uysal
Summary: Graphene oxide (GO) membranes are excellent candidates for separation applications, and understanding the interaction between water, ions, and the GO interface is critical. Experimental results show that solution conditions significantly impact water organization and lanthanide adsorption, which is connected to GO membrane performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Youngmin Song, Jong Yu Song, Jae-Eul Shim, Dong Hyung Kim, Hee-Kyung Na, Eun-Ah You, Young-Geun Ha
Summary: This paper presents a highly effective and efficient electrode passivation method using a self-assembled multilayer (SAML) to achieve operational stability of electrolyte-gated transistor (EGT) biosensors. The SAML-passivated EGT biosensor works stably in phosphate-buffered saline (PBS) and exhibits ultrasensitive, quantitative, and reliable detection of Tau protein.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Srikanth Nayak, Kaitlin Lovering, Ahmet Uysal
Article
Materials Science, Multidisciplinary
Minh Nhut Le, Hyeongyeon Kim, Yeo Kyung Kang, Youngmin Song, Xugang Guo, Young-Geun Ha, Choongik Kim, Myung-Gil Kim
JOURNAL OF MATERIALS CHEMISTRY C
(2019)
