Article
Chemistry, Physical
Gargi Joshi, Kosuke Okeyoshi, Fitri Adila Amat Yusof, Tetsu Mitsumata, Maiko K. Okajima, Tatsuo Kaneko
Summary: By exploring the fluidic geometry of a liquid crystalline polysaccharide solution containing micron-sized rod and platelet units, it was found that the presence of platelet units contributes lateral capillary interactions and helps rod units form a wider self-assembled structure with high viscosity.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Chemistry, Physical
Shalaka K. Kale, Andrew J. Cope, David M. Goggin, Joseph R. Samaniuk
Summary: The study developed a miniaturized radial Langmuir trough to investigate the interfacial rheological properties of complex fluid-fluid interfaces, compared with a commercial rectangular Langmuir trough. By conducting in situ visualization in the radial trough, micrographs were used to obtain film properties for each material. This advance in colloid and interface science provides a new method to capture structure-property relationships of planar interfaces, which will contribute to the development of constitutive modeling of complex fluid-fluid interfaces.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Shuxian Wang, Wenrou Tian, Jun Han, Najun Li, Dongyun Chen, Qingfeng Xu, Hua Li, Jianmei Lu
Summary: In this study, self-assembled monolayers (SAMs) were constructed on the surface of Ti3C2 MXene to improve its environmental stability and piezocatalytic activity. The surface-treated Ti3C2 exhibits different lattice parameters and symmetry, leading to an increased polarization. The presence of polar functional groups in SAMs significantly increases the surface potential of Ti3C2, promoting the migration of piezoelectric electrons. Among the different SAMs, Ti3C2/SAMs-NH2 shows the highest piezocatalytic performance, improving the removal of BPA and the production of H-2 by 7 and 1.8 times, respectively, and remains stable under 100% relative humidity for 15 days.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Fernando Martinez-Pedrero, Andres Gonzalez-Banciella, Alba Camino, Ana Mateos-Maroto, Francisco Ortega, Ramon G. Rubio, Ignacio Pagonabarraga, Carles Calero
Summary: Magnetic colloids adsorbed at a fluid interface form unique self-assembled structures that exhibit different characteristics under static and dynamic conditions, which can be used as remotely activated conveyor belts and accelerate surface chemical reactions.
Article
Chemistry, Physical
Merin Jose, Madivala G. Basavaraj, Dillip K. Satapathy
Summary: By varying the softness of microgel particles, control over the self-assembly process during sessile drop evaporation is achieved. Lower particle concentrations result in coffee ring-like deposits, which can be avoided by using softer microgels.
Article
Chemistry, Physical
Zhou Yang, Jin Zhang, Changfeng Wang, Hanzhong Cui, Li Yang, Huiyan Zhang, Renguo Guan
Summary: In this study, a new method combining capillary-assisted self-assembly with nascent hydrogen reduction technique is proposed for one-step coating of layered-stacked graphene on aluminum foil. The aluminum foil coated with graphene exhibits excellent corrosion resistance.
Article
Chemistry, Multidisciplinary
Zhilin Liu, Hailong Xiong, Yaxiao Luo, Liangliang Zhang, Kuo Hu, Ling Zhang, Yu Gao, Zhen-An Qiao
Summary: An interface-induced self-assembly strategy was developed to synthesize ordered mesoporous carbon/Ti3C2Tx heterostructures with high specific surface areas and excellent thermodynamic stability. These heterostructures exhibited superior performance as electrode materials for supercapacitors.
Article
Multidisciplinary Sciences
Diana Broboana, Ana-Maria Bratu, Istvan Magos, Claudiu Patrascu, Corneliu Balan
Summary: The dripping regime near fluid droplet breakup has been analyzed through experiments and numerical correlations. The distribution of the zeta-coefficient was found to be a relevant parameter in analyzing and quantifying the breakup process. This study has the potential to develop new techniques and more precise procedures for determining the interfacial rheology of viscous and complex fluids.
SCIENTIFIC REPORTS
(2022)
Article
Nanoscience & Nanotechnology
Jin Yong Shin, Bom Lee, Heo Yeon Lim, Simon Kim, Seong-Jun Jeong
Summary: The proposed TDSA method allows for neutral surface-free vertical orientations of BCP nanopatterns, independent of substrate polarizability, and can generate various morphologies by adjusting trench width and BCP molecular weight. This method has the potential advantage for designing process/device layouts needed for effective manufacturing processes.
Article
Nanoscience & Nanotechnology
Minkyeong Park, Seulki Kang, Chongyong Nam, Karnati Narasimha, Won Bo Lee, So-Jung Park
Summary: This study reports the magnetic field-induced self-assembly of a conjugated block copolymer and iron oxide nanoparticles at the air-water interface. The magnetic field significantly improves the degree of order, resulting in long-range ordered nanoarrays of the polymer and nanoparticles. The size of the nanoparticles plays a crucial role in the formation of an ordered assembly structure at the nanometer scale.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Multidisciplinary
Jinchi Han, Farnaz Niroui, Jeffrey H. Lang, Vladimir Bulovic
Summary: The absence of a versatile, scalable, and defect-free bottom-up assembly of nanoparticles has been a challenge for the large-scale integration of nanoparticle-based devices. In this study, we propose a self-limiting dielectrophoretic approach that can precisely align nanoparticles onto electrodes over a large area. Experimental results show a 70% yield of single-nanowire assembly, and factors limiting the current yield are discussed. Improving nanoparticle-electrode contact and reducing capillary force during the drying process are expected to further increase the yield. The approach also demonstrates versatility for scalable and site-selective alignment of various nanoparticles.
Article
Chemistry, Physical
Fushuai Wang, Shihao Tian, Quanzi Yuan
Summary: The anisotropic growth and different interface properties of ionic crystal at microscale pose challenges to controlling and obtaining ordered crystals at macroscale. This has led to limited research on self-assembly of ionic crystal. This study demonstrates the use of evaporation-induced crystal self-assembly (EICSA) method to regulate sodium chloride (NaCl) drops on a hydrophobic substrate using trace amounts of water-soluble organic polymer (polyacrylamide, PAM) to construct highly ordered self-assembly configurations. The addition of PAM promotes nucleation and inhibits growth, resulting in the formation of numerous small-sized NaCl crystals, which are then assembled together in an orderly manner with the adhesion of PAM. Additionally, the spontaneous lifting of crystals is directly revealed through experiments, and a lattice model is developed to explain the physical mechanisms behind the evolution of the self-assembly configurations. The research findings provide a deeper understanding of the construction and control of self-assembly in ionic crystal, with significant applications in outdoor electronics protection, cultural relics conservation, and chemical production.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Chemistry, Multidisciplinary
Rui Zhang, Zhilin Liu, Tu-Nan Gao, Liangliang Zhang, Yuenan Zheng, Jianan Zhang, Ling Zhang, Zhen-An Qiao
Summary: A new method using solvent polarity induced interface self-assembly strategy has been developed to construct mesoporous triazine-based carbon materials with uniform tunable pore sizes, high surface areas, and ultrahigh nitrogen content. These materials exhibit predominant CO2 adsorption performance and exceptional selectivity for the capture of CO2 over N-2.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Thermodynamics
Raihan Tayeb, Yuwen Zhang
Summary: A multiscale simulation method is used to investigate and control the self-assembly of charged polymeric nanoparticles in droplet solution deposited on a substrate. The simulation combines finite volume multiphase VOF method, Dissipative Particle Dynamics, and Level Set parameters to reduce spurious current in the droplet. By analyzing the effects of DLVO forces, van der Waals force, substrate friction, and contact angles, the study provides valuable tools for optimizing nanoparticle self-assembly.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Pan Tian, Minghui Tan, Guiqiang Zhu, Dan Wang, Guoxin Lu, Mengjiao Cheng
Summary: Wettability transition is a significant responsive mechanism applied to construct smart materials and systems. In this article, a track-guided self-transportation system mediated by sequential wettability transition accompanied with capillary transportation is developed. The system is used for directed self-assembly of multiple PDMS building blocks.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Avik Das, Ranajit Mondal, Debasis Sen, Jitendra Bahadur, Dillip K. Satapathy, Madivala G. Basavaraj
Summary: The packing of non-spherical particles is of fundamental importance in materials science. This article presents a novel approach for quantifying the packing fraction of non-spherical particles and demonstrates its application in analyzing the structural correlation of nano-ellipsoids. The results highlight the significance of considering positional and rotational correlation in determining packing fraction.
Article
Chemistry, Multidisciplinary
Manigandan Sabapathy, Khalid Zubair Md, Hemant Kumar, Sashikumar Ramamirtham, Ethayaraja Mani, Madivala G. Basavaraj
Summary: The study utilizes aggregation between oppositely charged particles to visualize and quantify the equilibrium position of charged colloidal particles at the fluid-water interface, highlighting the effect of size ratio on measurement accuracy. The selective deposition of nanoparticles enables the distinct visualization of the three-phase contact line, facilitating electron microscopy analysis and determination of equilibrium contact angle.
Article
Chemistry, Multidisciplinary
Sanket Kumar, Madivala G. Basavaraj, Dillip K. Satapathy
Summary: This study presents a method to control the morphology of desiccation cracks by exploiting the combined effect of particle shape anisotropy and the shape of the confining boundary. The shape of the drying front and the wells have a strong influence on the temporal evolution of the drying front and the morphology of the cracks. The influence of the confining boundary on crack formation is found to be long-ranged.
Article
Polymer Science
Rumiaya Pervin, Pijush Ghosh, Madivala G. Basavaraj
Summary: This study investigates the variation in thermodynamic and kinetic properties of a casting solution to engineer pores in a polymer film. The driving force for liquid-liquid phase separation and the viscosity of the casting solution are found to play key roles in determining the final film morphology and pore density.
JOURNAL OF POLYMER RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Madivala G. Basavaraj, Hemant Kumar
Summary: Emulsions are high-surface-energy materials that are typically stabilized by surfactants, polymers, particles, or a combination of these. Plant latex, with its surface-active properties, can be used as a versatile and sustainable source for interface stabilization of emulsions, providing an alternative to costly and environmentally detrimental synthetic methods.
Article
Food Science & Technology
S. Padma Ishwarya, Venkateshwar Rao Dugyala, Shantanu Pradhan, Madivala G. Basavaraj
Summary: Milk adulteration is a major challenge in the dairy industry. Current methods for detecting starch adulteration in milk have limitations, and there is a need for a chemical-free method with lower detection limit. This study proposes a sessile drop evaporation-based approach to detect starch adulteration in milk and investigates the influence of starch adulteration on the evaporative deposition patterns.
Article
Chemistry, Multidisciplinary
Nithin Madhavan, Abhijit P. Deshpande, Ethayaraja Mani, Madivala G. Basavaraj
Summary: Electrostatic heteroaggregation, the aggregation of oppositely charged soft materials, has been widely researched in fields such as environmental engineering, food technology, and pharmaceutical formulations. Recently, there has been a renewed interest in exploring this phenomenon for interface stabilization and the development of functional materials. This article provides an overview of recent contributions in the field, focusing on fundamental studies of electrostatic heteroaggregation and its influence on the formation of Pickering emulsions and the development of porous ceramics.
Article
Chemistry, Multidisciplinary
Madhvi Tiwari, Madivala G. Basavaraj, Venkateshwar Rao Dugyala
Summary: Fundamental studies on Pickering double emulsions are important for their industrial applications. This study proposes a simple single-step method to stabilize different types of double emulsions using hematite and silica particle systems. The wettability of hematite particles can be tuned by sequential addition of oleic acid, and the size distribution of oil and water droplets in the emulsions can be controlled by oleic acid concentration and particle surface area. This method provides a strategy to tailor the formation of different emulsion types by sequential in situ surface modification of particles.
Article
Chemistry, Multidisciplinary
Preetika Rastogi, Dirk Honecker, Diego Alba Venero, Najet Mahmoudi, Niket S. Kaisare, Madivala G. Basavaraj
Summary: In this study, water-in-xylene microemulsions were investigated using small-angle neutron scattering (SANS), revealing that the microstructure and interactions of the microemulsions vary with solvent concentration and temperature. This fundamental investigation provides insights into the phase behavior of multiple component microemulsions and their design for applications at high temperatures.
Article
Chemistry, Multidisciplinary
S. Karishma, Kirti Rajvanshi, Hemant Kumar, Madivala G. Basavaraj, Ethayaraja Mani
Summary: This study demonstrates that water-soluble homopolymers can stabilize oil-in-water emulsions, opening avenues for the use of eco-friendly biopolymers as alternatives to synthetic emulsifiers.
Article
Chemistry, Multidisciplinary
Sanket Kumar, Madivala G. Basavaraj, Dillip K. Satapathy
Summary: This study reports on the influence of polarity and surface charge density on the nucleation and growth kinetics of desiccation cracks in colloidal deposits during drying. The results show that deposit formed by positively charged colloids has higher average spacing between cracks and crack opening compared to that formed by negatively charged colloids. The temporal evolution of crack growth is found to be faster for deposits of positively charged particles. The distinct crack patterns and kinetics are explained by considering the spatial arrangement of particles in the deposit, which is strongly influenced by the substrate-particle and particle-particle interactions. Interestingly, decreasing the surface charge of the colloids leads to an increase in crack spacing, crack opening, and crack widening rate.
Article
Instruments & Instrumentation
C. Sreejith, Kiruthika Jayaseelan, Shijoy Thomas, Raghunathan Rengaswamy, Madivala G. Basavaraj
Summary: The synthesis of drug-loaded microparticles with precise control over size distribution and shape is essential. In this study, a method combining spinning disk atomization and precipitation is employed to produce drug-loaded polymeric microparticles with a narrow size distribution. The laboratory equipment designed with a non-contact seal system ensures operational and personnel safety while producing microparticles under moderate operating conditions.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2023)
Article
Nanoscience & Nanotechnology
Nithin Madhavan, Manas Mukherjee, Madivala G. Basavaraj
Summary: This study presents a facile method that combines Pickering emulsion templating and direct ink writing-based 3D printing to fabricate porous ceramic materials. The control over the microstructure and rheology of the Pickering emulsion ink was achieved by tuning the emulsion formulation parameters. The resulting emulsion-templated porous TiO2 ceramic showed potential for various applications, including catalysis.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Physical
Sankar Hariharan, Sumesh P. Thampi, Madivala G. Basavaraj
Summary: The evaporation of colloidal dispersion drops on inclined solid substrates leads to the formation of the coffee-ring effect, where more particles are accumulated at the edge. The symmetry of the patterns formed from dried drops is altered when the substrate is inclined due to gravity's influence. We conducted a systematic investigation on the kinetics of evaporation of particle-laden drops on hydrophilic inclined solid substrates, varying the angle of inclination and analyzing the contribution of different processes to the evaporation kinetics.
Article
Chemistry, Physical
Dinesh Parthasarathy, Santhan Chandragiri, Sumesh P. Thampi, Parag Ravindran, Madivala G. Basavaraj
Summary: This article investigates the inward drift of a coffee stain, a phenomenon caused by the descent of the water-air interface of a drying drop due to solvent evaporation. The study examines the effect of particle diameter, substrate wettability, and particle concentration on the inward drift of the coffee stain through experiments and model predictions. Additionally, a novel method to estimate the coefficient of friction between particles and the substrate is proposed.