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1. Co-assemblies of polyoxometalate {Mo72Fe30}/double-tailed magnetic-surfactant for magnetic-driven anchorage and enrichment of protein

Author:
Zhao, Wenrong; Cui, Jiwei; Hao, Jingcheng; Van Horn, J. David
Source:
Journal of colloid and interface science 2019 v.536 pp. 88-97
ISSN:
0021-9797
Subject:
surfactants,   etc   ; magnetic fields; myoglobin;     Show all 3 Subjects
Abstract:
... Covalent grafting and electrostatic-driven assembly have been two strategies in constructing well-defined polyoxometalate (POM) assemblies to produce specific morphologies and desirable properties. The modification of anionic counter-ions of amphiphilic compounds in POM-surfactant hybrid systems is still unexploited. Herein, we report the co-assembly of a synthetic double-tailed magnetic surfactan ...
DOI:
10.1016/j.jcis.2018.10.037

2. Shear-Induced Transformation of Polymer-Rich Lamellar Phases to Micron-Sized Vesicles

Author:
Großkopf, Sören; Tiersch, Brigitte; Koetz, Joachim; Mix, Andreas; Hellweg, Thomas
Source:
Langmuir 2019 v.35 no.8 pp. 3048-3057
ISSN:
1520-5827
Subject:
surfactants,   etc   ; microscopy; rheology;     Show all 3 Subjects
Abstract:
... In the present work, we study the shear-induced transformation of polymer-rich lamellar phases into vesicles. The evolution of vesicle size is studied by different scattering techniques, rheology, and microscopy methods. The lamellar phase found in the system D₂O/o-xylene/Pluronic PE9400/C₈TAB can be fully transformed to multilamellar vesicles (MLVs) by applying shear. The size of the MLVs is prop ...
DOI:
10.1021/acs.langmuir.8b02786

3. Wetting Transition at a Threshold Surfactant Concentration of Evaporating Sessile Droplets on a Patterned Surface

Author:
Zhong, Xin; Ren, Junheng; Chong, Karen Siew-Ling; Ong, Kian-Soo; Duan, Fei
Source:
Langmuir 2019 v.35 no.13 pp. 4509-4517
ISSN:
1520-5827
Subject:
surfactants,   etc   ; droplets; drying; evaporation; viscosity;     Show all 5 Subjects
Abstract:
... Wetting transitions induced by varying the components in a solution of a drying droplet can lead to its evolving shape on a textured surface. It can provide new insights on liquid pattern control through manipulating droplet solutions. We show the pronounced transitions of wetting for surfactant solution droplets drying on a micropyramid-patterned surface. At low initial surfactant concentrations, ...
DOI:
10.1021/acs.langmuir.9b00170

4. A novel strategy to purify conductive polymer particles

Author:
Spence, Daron; Polizos, Georgios; Joshi, Pooran; Sharma, Jaswinder
Source:
RSC advances 2019 v.9 no.9 pp. 4857-4861
ISSN:
2046-2069
Subject:
surfactants,   etc   ; particle size; polymers; washing;     Show all 4 Subjects
Abstract:
... The purification of conductive polymer (e.g., polyaniline) particles is a challenging task, especially when the particle size is small. Herein, we demonstrate a unique strategy (electrode-based) to purify polyaniline particles by exploiting the difference in surface charge between particles and surfactants, and compare the results with a commonly used purification strategy (washing). ...
DOI:
10.1039/c8ra08372j

5. Correction: Click chemistry approaches to expand the repertoire of PEG-based fluorinated surfactants for droplet microfluidics

Author:
Scanga, Randall; Chrastecka, Lucie; Mohammad, Ridhwan; Meadows, Austin; Quan, Phenix-Lan; Brouzes, Eric
Source:
RSC advances 2019 v.9 no.1 pp. 255-256
ISSN:
2046-2069
Subject:
surfactants,   etc   ; chemistry; droplets; microfluidic technology;     Show all 4 Subjects
Abstract:
... Correction for ‘Click chemistry approaches to expand the repertoire of PEG-based fluorinated surfactants for droplet microfluidics’ by Randall Scanga et al., RSC Adv., 2018, 8, 12960–12974. ...
DOI:
10.1039/c8ra90097c

6. Mechanistic understanding of abnormal reverse phase chromatographic behavior of basic analytes in the presence of sodium dodecyl sulfate

Author:
Socia, Adam; Liu, Yong; Abend, Andreas; Wuelfing, W. Peter
Source:
Journal of chromatography 2019 v.1595 pp. 108-116
ISSN:
0021-9673
Subject:
surfactants,   etc   ; chromatography; pH; sodium dodecyl sulfate;     Show all 4 Subjects
Abstract:
... In the process of dissolution method development for Merck proprietary compound A, a basic analyte, abnormal chromatographic behavior involving peak splitting and retention time shifting in the presence of sodium dodecyl sulfate (SDS) in the sample solution was observed. A mechanistic study was conducted and the level and type of surfactant, along with the pKa of the analyte, were determined to be ...
DOI:
10.1016/j.chroma.2019.02.044

7. Lipid-apolipoprotein interactions in amyloid fibril formation and relevance to atherosclerosis

Author:
Howlett, Geoffrey J.; Ryan, Timothy M.; Griffin, Michael D.W.
Source:
Biochimica et biophysica acta 2019 v.1867 no.5 pp. 502-507
ISSN:
1570-9639
Subject:
surfactants,   etc   ; amyloid; apolipoproteins; atherosclerosis; humans; micelles; phospholipids;     Show all 7 Subjects
Abstract:
... The apolipoprotein family is a set of highly conserved proteins characterized by the presence of amphipathic α-helical sequences that mediate lipid binding. Paradoxically, this family of proteins is also prominent among the proteins known to form amyloid fibrils, characterized by extensive cross-β structure. Several apolipoproteins including apolipoprotein (apo) A-I, apoA-II and apoC-II accumulate ...
DOI:
10.1016/j.bbapap.2018.08.010

8. Dancing performance of organic droplets in aqueous surfactant solutions

Author:
Čejková, Jitka; Schwarzenberger, Karin; Eckert, Kerstin; Tanaka, Shinpei
Source:
Colloids and surfaces 2019 v.566 pp. 141-147
ISSN:
0927-7757
Subject:
surfactants,   etc   ; colloids; droplets; liquids; sodium dodecyl sulfate;     Show all 5 Subjects
Abstract:
... Droplet systems remain the subject of a constant fascination in science and technology. Here we focus on organic droplets floating on the surface of aqueous surfactant solutions. These droplets can exhibit intriguing interactions. Recently we have found independently in two laboratories that we can observe almost the same complex collective behaviour in two different droplet systems. The aim of th ...
DOI:
10.1016/j.colsurfa.2019.01.027

9. Achieving high yield of graphene nanoplatelets in poloxamer-assisted ultrasonication of graphite in water

Author:
Giglio, Cameron S.; Osazuwa, Osayuki; Kontopoulou, Marianna; Docoslis, Aristides
Source:
Journal of colloid and interface science 2019 v.539 pp. 107-117
ISSN:
0021-9797
Subject:
surfactants,   etc   ; energy; graphene; nanocomposites; sonication; ultrasonic treatment;     Show all 6 Subjects
Abstract:
... The role of surfactant (Pluronic® F 127) concentration on the yield and morphological characteristics of graphene nanoplatelets (GNPs) produced from the sonication of aqueous graphene suspensions is investigated in this work. By employing a wide surfactant concentration range (0.1−15 wt%) and sonication power densities up to 420 W L−1 we identify two graphene exfoliation regimes: the first occurs ...
DOI:
10.1016/j.jcis.2018.12.033

10. Water Dynamics in the Hydration Shell of Amphiphilic Macromolecules

Author:
Zhang, Jiaqi; Liu, Liyuan; Chen, Yu; Wang, Bin; Ouyang, Chunmei; Tian, Zhen; Gu, Jianqiang; Zhang, Xueqian; He, Mingxia; Han, Jiaguang; Zhang, Weili
Source:
TheJournal of physical chemistry 2019 v.123 no.13 pp. 2971-2977
ISSN:
1520-5207
Subject:
surfactants,   etc   ; hydrogen bonding; hydrophobicity; moieties; spectroscopy;     Show all 5 Subjects
Abstract:
... In the present work, the dynamics of water in the hydration shell of amphiphilic hyperbranched polyglycerol (HPG) molecules was investigated using THz and GHz dielectric relaxation spectroscopies. Different from the typical small amphiphilic molecules, the HPG macromolecule provides a rather dispersionless background and allows the direct observation of four types of water molecules in the hydrati ...
DOI:
10.1021/acs.jpcb.9b02040

11. Rheo-SANS study on relationship between micellar structures and rheological behavior of cationic gemini surfactants in solution

Author:
Iwase, Hiroki; Kawai, Risa; Morishima, Ken; Takata, Shin-ichi; Yoshimura, Tomokazu; Shibayama, Mitsuhiro
Source:
Journal of colloid and interface science 2019 v.538 pp. 357-366
ISSN:
0021-9797
Subject:
surfactants,   etc   ; micelles; neutron diffraction; rheological properties;     Show all 4 Subjects
Abstract:
... Gemini surfactant 12–2–12 (dimethylene-1,2-bis(dodecyl dimethylammonium bromide)) solutions are known to show shear thickening and thinning under salt-free conditions. Because the rheological behavior of the wormlike micelles formed by 12–2–12 in solution is related to their structure, we expected that changes to the precursor structure would affect their rheological behaviors. It is also importan ...
DOI:
10.1016/j.jcis.2018.11.104

12. General Self-Assembly Method for Deposition of Graphene Oxide into Uniform Close-Packed Monolayer Films

Author:
Holm, Alexander; Kunz, Larissa; Riscoe, Andrew R.; Kao, Kun-Che; Cargnello, Matteo; Frank, Curtis W.
Source:
Langmuir 2019 v.35 no.13 pp. 4460-4470
ISSN:
1520-5827
Subject:
cationic surfactants,   etc   ; graphene oxide; microstructure; oxidation;     Show all 4 Subjects
Abstract:
... Depositing a morphologically uniform monolayer film of graphene oxide (GO) single-layer sheets is an important step in the processing of many composites and devices. Conventional Langmuir–Blodgett (LB) deposition is often considered to give the highest degree of morphology control, but film microstructures still vary widely between GO samples. The main challenge is in the sensitive self-assembly o ...
DOI:
10.1021/acs.langmuir.8b03994

13. Surfactant-Mediated Collapse of Liquid Marbles and Directed Assembly of Particles at the Liquid Surface

Author:
Singha, Pradip; Swaminathan, Sreena; Yadav, Ajeet Singh; Varanakkottu, Subramanyan Namboodiri
Source:
Langmuir 2019 v.35 no.13 pp. 4566-4576
ISSN:
1520-5827
Subject:
surfactants,   etc   ; microfluidic technology; microparticles; surface tension;     Show all 4 Subjects
Abstract:
... Extensive research is being devoted to both the fundamental and applied aspects of liquid marbles (LMs). However, influence of the surface tension of the liquid substrate on the stability of the LMs and LM-mediated capillary interaction remains unexplored. In this work, we unveil the role of the surface tension of the liquid substrate on the collapse of multilayered LMs and apply this knowledge fo ...
DOI:
10.1021/acs.langmuir.8b03821

14. Substrate-Driven Transient Self-Assembly and Spontaneous Disassembly Directed by Chemical Reaction with Product Release

Author:
Wang, Huaxin; Wang, Yanyan; Shen, Bowen; Liu, Xin; Lee, Myongsoo
Source:
Journal of the American Chemical Society 2019 v.141 no.10 pp. 4182-4185
ISSN:
1520-5126
Subject:
surfactants,   etc   ; Lewis bases; hydrophobicity; nanomaterials; neutralization;     Show all 5 Subjects
Abstract:
... The chemical reactivity of molecules can be significantly enhanced when they are trapped in a confined space. Although such a confinement effect can be found in many self-assembled nanostructures, dissipation after completing the reaction to release the product remains elusive. Here we report substrate-directed transient self-assembly for accelerating a chemical reaction and spontaneous disassembl ...
DOI:
10.1021/jacs.8b12777

15. Breaking of Water-in-Crude Oil Emulsions. 8. Demulsifier Performance at Optimum Formulation Is Significantly Improved by a Small Aromatic Content of the Oil

Author:
Alvarado, José G.; Delgado-Linares, José G.; Forgiarini, Ana M.; Salager, Jean-Louis
Source:
Energy & fuels 2019 v.33 no.3 pp. 1928-1936
ISSN:
1520-5029
Subject:
surfactants,   etc   ; asphaltenes; emulsions; fuels; hydrophilicity; lipophilicity; oils;     Show all 7 Subjects
Abstract:
... Asphaltenes tend to aggregate in different structures depending on the aromatic content of the oil phase. The different aggregates adsorb at the interface as some kind of lipophilic surfactant, which tends to stabilize water-in-oil emulsions. Hydrophilic demulsifier molecules are added to combine with asphaltenes until the optimum formulation is attained at HLD = 0, thus resulting in the emulsion ...
DOI:
10.1021/acs.energyfuels.8b03994

16. Dynamic Surface Properties of Fullerenol Solutions

Author:
Noskov, Boris A.; Timoshen, Kirill A.; Akentiev, Alexander V.; Chirkov, Nikolay S.; Dubovsky, Ignat M.; Lebedev, Vasyli T.; Lin, Shi-Yow; Loglio, Giuseppe; Miller, Reinhard; Sedov, Victor P.; Borisenkova, Alina A.
Source:
Langmuir 2019 v.35 no.10 pp. 3773-3779
ISSN:
1520-5827
Subject:
surfactants,   etc   ; adsorption; dispersions; moieties; nanoparticles; rheology;     Show all 6 Subjects
Abstract:
... Application of dilational surface rheology, surface tensiometry, ellipsometry, Brewster angle, and transmission electron and atomic force microscopies allowed the estimation of the structure of the adsorption layer of a fullerenol with a large number of hydroxyl groups, C₆₀(OH)X (X = 30 ± 2). The surface properties of fullerenol solutions proved to be similar to the properties of dispersions of so ...
DOI:
10.1021/acs.langmuir.8b04152

17. Aryl amphiphile shape-directors for shape-controlled synthesis of organic semiconductor particles

Author:
Jones, Dorothy K.; Kerwin, Brendan; Zhao, Wenjing; Gavvalapalli, Nagarjuna
Source:
Chemical communications 2019 v.55 no.9 pp. 1306-1309
ISSN:
1364-548X
Subject:
surfactants,   etc   ; chemical compounds; chemical reactions; nanoparticles; semiconductors;     Show all 5 Subjects
Abstract:
... Currently, shape- and size-controlled synthesis of organic micro- and nano-particles mostly relies on aliphatic amphiphiles, which lack the structural diversity to provide tunable amphiphile–particle facet interaction energies and result in a limited range of particle shapes. Herein we report the design, synthesis, and utilization of two novel aryl amphiphiles as shape-directors (ShaDs) to obtain ...
DOI:
10.1039/c8cc09405e

18. Tuning of the aggregation number of Platonic micelles with a binary mixture of calix[4]arene surfactants

Author:
Lee, Ji Ha; Fujii, Shota; Takahashi, Rintaro; Sakurai, Kazuo
Source:
Chemical communications 2019 v.55 no.9 pp. 1303-1305
ISSN:
1364-548X
Subject:
surfactants,   etc   ; aromatic hydrocarbons; chemical reactions; micelles;     Show all 4 Subjects
Abstract:
... The mixture ratios were used as a factor for aggregation number (Nₐgg) determination in binary mixtures of calix[4]arene surfactants. Platonic micelles having different Nₐgg were prepared by adjusting the ratio of oppositely charged compounds. ...
DOI:
10.1039/c8cc09621j

19. Self-assembling nanoprobes that display two-dimensional fluorescent signals for identification of surfactants and bacteria

Author:
Long, Shuangshuang; Qiao, Qinglong; Deng, Fei; Miao, Lu; Yoon, Juyoung; Xu, Zhaochao
Source:
Chemical communications 2019 v.55 no.7 pp. 969-972
ISSN:
1364-548X
Subject:
surfactants,   etc   ; bacteria; chemical compounds; chemical reactions; fluorescence;     Show all 5 Subjects
Abstract:
... The imidazolium-pyrene self-assembling nanoprobes can rapidly discriminate four types of surfactants. The surfactants disassembled the probes to turn on significant fluorescence and transform between a pyrene monomer and an excimer, generating a two-dimensional analysis map. The probes were further used to identify different bacterial species. ...
DOI:
10.1039/c8cc09544b

20. Sequence isomeric giant surfactants with distinct self-assembly behaviors in solution

Author:
Zhang, Wei; Shan, Wenpeng; Zhang, Shuailin; Liu, Yuchu; Su, Hao; Luo, Jiancheng; Xia, Yanfeng; Li, Tao; Wesdemiotis, Chrys; Liu, Tianbo; Cui, Honggang; Li, Yiwen; Cheng, Stephen Z. D.
Source:
Chemical communications 2019 v.55 no.5 pp. 636-639
ISSN:
1364-548X
Subject:
surfactants,   etc   ; chemical reactions; nanoparticles; polystyrenes; silsesquioxanes;     Show all 5 Subjects
Abstract:
... We have designed and synthesized a pair of sequence isomeric giant surfactants based on polystyrene (PS) and polyhedral oligomeric silsesquioxane (POSS) nanoparticles. Although these two macromolecules possess identical compositions as “sequence isomers”, the distinctly arranged POSS sequences lead to different molecular packing conformations, and further induce distinguished self-assembly behavio ...
DOI:
10.1039/c8cc09207a