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1. Numerical simulations of lift force and drag force on a particle in cross-flow microfiltration of colloidal suspensions to understand limiting flux

Author:
Makabe, Ryo; Akamatsu, Kazuki; Tatsumi, Rei; Koike, Osamu; Nakao, Shin-ichi
Source:
Journal of membrane science 2021 v.621 pp. 118998
ISSN:
0376-7388
Subject:
colloids,   etc   ; hydrodynamics; microfiltration;     Show all 3 Subjects
Abstract:
... The aim of this study was to understand the limiting flux in cross-flow microfiltration of a colloidal suspension in terms of the balance of hydrodynamic forces on a particle. Numerical simulations were carried out to estimate the lift force resulting from the cross-flow, drag force resulting from the convective flux, and net force. Assuming that the limiting flux is the flux when the net force on ...
DOI:
10.1016/j.memsci.2020.118998

2. Controllable synthesis of patchy particles with tunable geometry and orthogonal chemistry

Author:
Chang, Fuqiang; Ouhajji, Samia; Townsend, Alice; Sanogo Lacina, Kanvaly; van Ravensteijn, Bas G.P.; Kegel, Willem K.
Source:
Journal of colloid and interface science 2021 v.582 pp. 333-341
ISSN:
0021-9797
Subject:
colloids,   etc   ; anisotropy; geometry; polymerization; polymers;     Show all 5 Subjects
Abstract:
... Self-assembly using anisotropic colloidal building blocks may lead to superstructures similar to those found in molecular systems yet can have unique optical, electronic, and structural properties. To widen the spectrum of achievable superstructures and related properties, significant effort was devoted to the synthesis of new types of colloidal particles. Despite these efforts, the preparation of ...
DOI:
10.1016/j.jcis.2020.08.038

3. Nanobubbles and nanoparticles

Author:
Alheshibri, Muidh; Al Baroot, Abbad; Shui, Lingling; Zhang, Minmin
Source:
Current opinion in colloid & interface science 2021 v.55 pp. 101470
ISSN:
1359-0294
Subject:
colloids,   etc   ; attitudes and opinions; gases; nanobubbles; nanoparticles;     Show all 5 Subjects
Abstract:
... Gas saturated solutions have attracted great attention in the past two decades with reports of stable nanobubbles in solutions. The fundamental interest focus arises from the surprising stability which opens up a wide range of potential applications where the interactions between particles and nanobubbles are important. Here, we review the current state of knowledge on systems involving both nanob ...
DOI:
10.1016/j.cocis.2021.101470

4. Structural transformations of growing thin colloidal crystals in confined space via convective assembly

Author:
Hu, Sumeng; Nozawa, Jun; Kang, Kejia; Guo, Suxia; Koizumi, Haruhiko; Wei, Zon-Han; Uda, Satoshi
Source:
Journal of colloid and interface science 2021 v.591 pp. 300-306
ISSN:
0021-9797
Subject:
colloids,   etc   ; crystals; grains; journals; methodology; particles;     Show all 6 Subjects
Abstract:
... The structural evolution of growing thin colloidal crystals in a confined space via the convective assembly technique has been investigated. The thin colloidal crystals were grown in a wedge-shaped cell, where the height of the cell increased with increased crystal growth. Triangle and square patterns, denoted as [111]- and [100]-oriented grains, respectively, were formed alternately as the height ...
DOI:
10.1016/j.jcis.2021.02.016

5. Effect of prenucleation clusters arising from liquid-liquid phase transition on nucleation in a one-component charged colloidal suspension

Author:
Liu, Jianing; Shen, Tong; Zhang, Shu
Source:
Journal of colloid and interface science 2021 v.589 pp. 77-84
ISSN:
0021-9797
Subject:
colloids,   etc   ; light microscopy; liquids; phase transition; prediction;     Show all 5 Subjects
Abstract:
... It is generally thought that liquid-liquid phase transition (LLPT) in a one-component suspension never or only very rarely happens. If this were true, it would contradict the two nonclassical nucleation models building on either liquid droplets or prenucleation clusters (PNCs). One way out of this paradox is to suppose that LLPT occurs in pathway to nucleation. This study specifies the physical pa ...
DOI:
10.1016/j.jcis.2020.12.088

6. Proposing an unbiased oxygen reduction reaction onset potential determination by using a Savitzky-Golay differentiation procedure

Author:
de Falco, Giacomo; Florent, Marc; De Rosa, Antonio; Bandosz, Teresa J.
Source:
Journal of colloid and interface science 2021 v.586 pp. 597-600
ISSN:
0021-9797
Subject:
colloids,   etc   ; data collection; electrochemistry; exhibitions; journals; voltammetry;     Show all 6 Subjects
Abstract:
... For proper and fair comparison of the performance of Oxygen reduction reaction (ORR) electrocatalysts an un-biased method to determine an onset potential value is needed. Here we report an easy mathematical approach based on the second derivative of linear sweep voltammetry curves, referred to as a second order discrete differentiation method (SODDM) that allows to accurately provide the onset pot ...
DOI:
10.1016/j.jcis.2020.10.127

7. Tubules, beads, discs and junctions – Morphologies and dynamics of dispersed multilamellar lipid phases in excess water

Author:
Bhatia, T.
Source:
Journal of colloid and interface science 2021 v.584 pp. 706-713
ISSN:
0021-9797
Subject:
colloids,   etc   ; dispersions; journals; lipids; sampling; solvents;     Show all 6 Subjects
Abstract:
... In this paper, experimental results on the swelling, dispersion and disintegration of the lamellae composed of the lipid, 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) in contact with excess water are described. Multilamellar structures nucleate and grow at the interface between the pure solvent and the lipid. The system evolves slowly via flow and coalescence of lamellae through a variety of no ...
DOI:
10.1016/j.jcis.2020.08.126

8. Shear Flow Behavior of Bidisperse Rodlike Colloids

Author:
Lang, Christian; Lettinga, Minne Paul
Source:
Macromolecules 2020 v.53 no.7 pp. 2662-2668
ISSN:
1520-5835
Subject:
colloids,   etc   ; prediction; viruses; viscosity;     Show all 4 Subjects
Abstract:
... A priori prediction of the flow properties of polydisperse rodlike macromolecules is a prerequisite for the understanding of many industrial and biological processes. Using mixtures of two naturally monodisperse viruses, we create a benchmark bidisperse suspension of rodlike colloids to test the effect of length bidispersity on the shear flow behavior. We find that the zero-shear viscosity is a no ...
DOI:
10.1021/acs.macromol.9b02239

9. Effective interaction between colloids immersed in a polymer blend and their effect on the equation of state of this blend

Author:
Chervanyov, A.I.
Source:
Journal of colloid and interface science 2020 v.563 pp. 156-167
ISSN:
0021-9797
Subject:
colloids,   etc   ; compressibility; equations; polymers;     Show all 4 Subjects
Abstract:
... Owing to the entropic interactions between polymers comprising a blend and surfaces of colloids immersed in this blend, the polymer inter-phases are formed between the colloids and blend. These inter-phases that are non-uniform both in density and composition, mediate the effective interaction between colloids immersed in a polymer blend. We surmise that there is an additional non-osmotic mechanis ...
DOI:
10.1016/j.jcis.2019.12.023

10. Positive and negative birefringence in packed films of binary spherical colloidal particles

Author:
Inoue, Kai; Inasawa, Susumu
Source:
RSC advances 2020 v.10 no.5 pp. 2566-2574
ISSN:
2046-2069
Subject:
colloids,   etc   ; drying; models;     Show all 3 Subjects
Abstract:
... We have investigated the birefringence in packed films of binary spherical colloidal particles. Particulate films were obtained by drying a mixed suspension of colloidal particles with two different diameters. We observed positive and negative birefringence depending on the diameters and volume ratios of the large and small particles. When the diameters of the large and small particles were simila ...
DOI:
10.1039/c9ra09704j

11. Theoretical study on the tunable electronic band structure of Cs2PbI2Cl2/CsPbBr3 halide perovskite heterostructure driven by ferroelectric polarization modulation

Author:
Liao, Cheng-Sheng; Yu, Zhuo-Liang; He, Peng-Bin; Liu, Biao; Zeng, Ruosheng; Wan, Qiang; Cai, Meng-Qiu
Source:
Journal of colloid and interface science 2021 v.597 pp. 233-241
ISSN:
0021-9797
Subject:
colloids,   etc   ; exhibitions; halides; journals; oxides; research; tensile strength;     Show all 7 Subjects
Abstract:
... Ferroelectric polarizationhas been considered to be an key factor to tune the structural and photoelectric properties of perovskites and their heterostructures. While there has been growing researches made in the novel phenomena originating from interface formed between oxide perovskites, the effects of ferroelectric polarization on the electronic properties of halide perovskites and their heteros ...
DOI:
10.1016/j.jcis.2021.03.121

12. Polyampholyte physics: Liquid–liquid phase separation and biological condensates

Author:
Dinic, Jelena; Marciel, Amanda B.; Tirrell, Matthew V.
Source:
Current opinion in colloid & interface science 2021 v.54 pp. 101457
ISSN:
1359-0294
Subject:
colloids,   etc   ; attitudes and opinions; condensates; mathematical theory; models; proteins; separation;     Show all 7 Subjects
Abstract:
... Here we review the current understanding of molecular interactions that govern liquid–liquid phase separation (LLPS) of biological condensates. The connection between sequence, chain conformation, and phase separation of intrinsically disordered proteins (IDPs) and their model polyampholytes is discussed. In particular, we highlight how the charge pattern influences the conformation and phase beha ...
DOI:
10.1016/j.cocis.2021.101457

13. Generation and stability of bulk nanobubbles: A review and perspective

Author:
Zhou, Limin; Wang, Shuo; Zhang, Lijuan; Hu, Jun
Source:
Current opinion in colloid & interface science 2021 v.53 pp. 101439
ISSN:
1359-0294
Subject:
colloids,   etc   ; attitudes and opinions; bubbles; gases; nanobubbles; prediction; research;     Show all 7 Subjects
Abstract:
... Bulk nanobubbles (BNBs) are submicron gaseous domains dispersed in solutions, which are supposed to survive for several hours or even days. In recent years, there has been a rapid growth in the research and extraordinary applications of BNBs. Conventional theories based on gas diffusion and Laplace pressure, however, predicted that nanoscale gas bubbles in water should dissolve within microseconds ...
DOI:
10.1016/j.cocis.2021.101439

14. Predicting coffee ring formation upon drying in droplets of particle suspensions

Author:
Hertaeg, Michael J.; Rees-Zimmerman, Clare; Tabor, Rico F.; Routh, Alexander F.; Garnier, Gil
Source:
Journal of colloid and interface science 2021 v.591 pp. 52-57
ISSN:
0021-9797
Subject:
colloids,   etc   ; coffee (beverage); contact angle; droplets; drying; suspensions;     Show all 6 Subjects
Abstract:
... Pattern formation is a common occurrence in drying colloidal systems. The most common in droplets, is a ring distribution where the constituents have relocated to the edge, which is referred to as a coffee ring. This deposit is unfavourable in many manufacturing processes and is of fundamental interest. In this study, we present a model capable of predicting when a coffee ring will be observed in ...
DOI:
10.1016/j.jcis.2021.01.092

15. Stability of surface and bulk nanobubbles

Author:
Tan, Beng Hau; An, Hongjie; Ohl, Claus-Dieter
Source:
Current opinion in colloid & interface science 2021 v.53 pp. 101428
ISSN:
1359-0294
Subject:
colloids,   etc   ; attitudes and opinions; bubbles; fields; gases; nanobubbles; prediction;     Show all 7 Subjects
Abstract:
... The existence of stable nanoscopic gaseous domains in liquids, or nanobubbles, has attracted both skepticism and intrigue since classical theory predicts that spherical gas bubbles cannot achieve stable equilibrium. Can we prove these gaseous domains exist, and if they do, how do they survive? We critically review contemporary theoretical perspectives of the stability of surface and bulk nanobubbl ...
DOI:
10.1016/j.cocis.2021.101428

16. Low Interfacial Free Energy Describes the Bulk Ordering Transition in Colloidal Cubes

Author:
Sharma, Abhishek K.; Escobedo, Fernando A.
Source:
TheJournal of physical chemistry 2021 v.125 no.19 pp. 5160-5170
ISSN:
1520-5207
Subject:
colloids,   etc   ; Gibbs free energy; nanoparticles; phase transition; surface tension;     Show all 5 Subjects
Abstract:
... Many hard faceted nanoparticles are known to undergo disorder-to-order phase transitions following a classical nucleation and growth mechanism. In a previous study [J. Phys. Chem. B 2018, 122, 9264–9273], it was shown that hard cubes undergo a nonclassical phase transition with a bulk character instead of originating from consolidated nuclei. Significantly, an unusually high fraction of ordered pa ...
DOI:
10.1021/acs.jpcb.1c01737

17. Distinguishing Nanoparticle–Nanoparticle Interactions between Gold and Silver Nanoparticles Controlled by Gemini Surfactants: Stability of Nanocolloids

Author:
Riedesel, Shawn; Kaur, Rajpreet; Bakshi, Mandeep Singh
Source:
Journal of physical chemistry 2021 v.125 no.9 pp. 5399-5411
ISSN:
1932-7455
Subject:
colloids,   etc   ; chemical structure; industrial applications; nanosilver; shelf life; sodium; surfactants;     Show all 7 Subjects
Abstract:
... Nanoparticle–nanoparticle (NP–NP) interactions were studied by choosing oppositely charged colloidal suspensions of Au and Ag NPs. For this purpose, sodium dodecyl sulfate-stabilized Au NPs were titrated with a series of Gemini surfactant (i.e., 12-n-12 and 16-n-16)-stabilized Ag NPs to demonstrate the effect of head group and hydrophobic tail modifications on the Au–Ag NP interactions. The purpos ...
DOI:
10.1021/acs.jpcc.1c00220

18. Marangoni flow alters wetting: Coffee ring and superspreading

Author:
Nikolov, Alex D.; Wasan, Darsh T.; Wu, Pingkeng
Source:
Current opinion in colloid & interface science 2021 v.51 pp. 101387
ISSN:
1359-0294
Subject:
colloids,   etc   ; attitudes and opinions; droplets; evaporation; particles; solids; solutes; surfaces;     Show all 8 Subjects
Abstract:
... Colloidal nano altered wetting is an everyday phenomenon with various applications. It occurs when an aqueous colloidal droplet is placed on a wet solid and evaporates with a pinned contact line (to form a shape similar to a coffee ring) and when a ‘superspreader’ is placed on a partially wet solid surface with an unpinned contact line. This article reviews recent advances on the mechanisms behind ...
DOI:
10.1016/j.cocis.2020.08.012

19. Synthesis of hybrid colloidal nanoparticles for a generic approach to 3D electrostatic directed assembly: Application to anti-counterfeiting

Author:
Platel, Romain; Vaure, Louis; Palleau, Etienne; Raffy, Simon; Guérin, François; Lagarde, Delphine; Cours, Robin; Marcelot, Cécile; Warot-Fonrose, Bénédicte; Nayral, Céline; Delpech, Fabien; Ressier, Laurence
Source:
Journal of colloid and interface science 2021 v.582 pp. 1243-1250
ISSN:
0021-9797
Subject:
colloids,   etc   ; emissions; journals; magnetism; nanoparticles; optical properties; photoluminescence; trapping; traps;     Show all 9 Subjects
Abstract:
... Hypothesis: The capability of making 3D directed assembly of colloidal nanoparticles on surfaces, instead of 2D one, is of major interest to generate, tailor, and enhance their original functionalities. The nanoxerography technique, i.e. electrostatic trapping of nanoparticles on charged patterns, showed such 3D assembly potentialities but is presently restricted to polarizable nanoparticles with ...
DOI:
10.1016/j.jcis.2020.08.098

20. Drying-induced back flow of colloidal suspensions confined in thin unidirectional drying cells

Author:
Inoue, Kai; Inasawa, Susumu
Source:
RSC advances 2020 v.10 no.27 pp. 15763-15768
ISSN:
2046-2069
Subject:
colloids,   etc   ; drying; liquids; mathematical models;     Show all 4 Subjects
Abstract:
... A clear back flow was observed in the thin unidirectional drying cell of a colloidal suspension. Flow around the colloidal-particle packing front was more complex than expected, even though a colloidal suspension was confined in a narrow space with a submillimeter-scale or shorter gap height. We propose that an increase in particle concentration around the packing front induces downward flow, whic ...
DOI:
10.1039/d0ra02837a