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Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers
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Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 August 2023) | Viewed by 5246

Special Issue Editor

Dr. Vasyl M. Haramus

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Guest Editor
Powder Based Materials Development Department, Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Bldg. 47, R.317, Max-Planck-Straße 1, 21502 Geesthacht, Germany
Interests: surfactants; polymers and nanoparticles in solution; nanocarriers for controlled and targeted release of drugs; materials with drug-device functions; small angle scattering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The controlled organization of molecules into complex multi-level objects with tailored properties is one of the main challenges of material science. The wide set from simple spherical micelles via fibers, vesicles (liposomes) to cubosomes, hexosomes or gels requires a variety of surfactant molecules of specific structure and physicochemical properties: single and double alkyl chains, bola-amphiphiles and zwiterionic head group, sugar-based, and others. The choice of molecules and the way of supramolecular organization and further characterization are the main goal of this Special issue of Molecules, which covers the wide areas of chemistry, physics, biology, medicine, and modeling. Contributions based on the keywords below will show the status of modern research. Review articles by experts in the field of self-assembly of surfactants and drug nanocarriers will be welcomed.

Dr. Vasyl M. Haramus
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • cubosomes
  • hexosomes
  • liposomes
  • nanostructured aqueous dispersions
  • drug nanocarriers
  • surfactants

Published Papers (4 papers)

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Research

8 pages, 1264 KiB  
Communication
Trap-and-Track for Characterizing Surfactants at Interfaces
by Jeonghyeon Kim and Olivier J. F. Martin
Molecules 2023, 28(6), 2859; https://doi.org/10.3390/molecules28062859 - 22 Mar 2023
Cited by 1 | Viewed by 1315
Abstract
Understanding the behavior of surfactants at interfaces is crucial for many applications in materials science and chemistry. Optical tweezers combined with trajectory analysis can become a powerful tool for investigating surfactant characteristics. In this study, we perform trap-and-track analysis to compare the behavior [...] Read more.
Understanding the behavior of surfactants at interfaces is crucial for many applications in materials science and chemistry. Optical tweezers combined with trajectory analysis can become a powerful tool for investigating surfactant characteristics. In this study, we perform trap-and-track analysis to compare the behavior of cetyltrimethylammonium bromide (CTAB) and cetyltrimethylammonium chloride (CTAC) at water–glass interfaces. We use optical tweezers to trap a gold nanoparticle and statistically analyze the particle’s movement in response to various surfactant concentrations, evidencing the rearrangement of surfactants adsorbed on glass surfaces. Our results show that counterions have a significant effect on surfactant behavior at the interface. The greater binding affinity of bromide ions to CTA+ micelle surfaces reduces the repulsion among surfactant head groups and enhances the mobility of micelles adsorbed on the interface. Our study provides valuable insights into the behavior of surfactants at interfaces and highlights the potential of optical tweezers for surfactant research. The development of this trap-and-track approach can have important implications for various applications, including drug delivery and nanomaterials. Full article
(This article belongs to the Special Issue Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers)
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12 pages, 8230 KiB  
Article
CO2-Responsive Wormlike Micelles Based on Pseudo-Tetrameric Surfactant
by Xia Wei, Xiran He, Dongmei Zhang and Xin Su
Molecules 2022, 27(22), 7922; https://doi.org/10.3390/molecules27227922 - 16 Nov 2022
Cited by 5 | Viewed by 1112
Abstract
Wormlike micelles, which are linear aggregates created by the self-assembly of surfactants, may entangle to form dynamic three-dimensional network-like structures, endowing solutions with considerable macroscopic viscoelasticity. Recently, a pressing need has arisen to research a novel stimuli-responsive worm-like micelle that is efficient and [...] Read more.
Wormlike micelles, which are linear aggregates created by the self-assembly of surfactants, may entangle to form dynamic three-dimensional network-like structures, endowing solutions with considerable macroscopic viscoelasticity. Recently, a pressing need has arisen to research a novel stimuli-responsive worm-like micelle that is efficient and environmentally friendly. CO2 is an inexpensive, abundant, non-toxic, biocompatible, and non-combustible gas, and it is anticipated that CO2 may serve as the trigger for stimuli-responsive worm-like micelles. In this paper, the formation of CO2-switchable pseudo-tetrameric surfactants, which subsequently self-assemble into CO2-switched wormlike micelles, is accomplished using a simple mixing of two commercial reagents, such as stearic acids and cyclen. The rheological characteristics switched by the use of CO2 are cycled between that of a low-viscosity (1.2 mPa·s) fluid and a viscoelastic fluid (worm-like micelles, 3000 mPa·s). This article expands the field of study on stimuli-responsive worm-like micelles. Full article
(This article belongs to the Special Issue Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers)
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13 pages, 2185 KiB  
Article
Enhanced Insecticidal Effect and Interface Behavior of Nicotine Hydrochloride Solution by a Vesicle Surfactant
by Wenjun Xiao, Xiufang Cao, Pengji Yao, Vasil M. Garamus, Qibin Chen, Jiagao Cheng and Aihua Zou
Molecules 2022, 27(20), 6916; https://doi.org/10.3390/molecules27206916 - 15 Oct 2022
Cited by 3 | Viewed by 1218
Abstract
Nicotine hydrochloride (NCT) has a good control effect on hemiptera pests, but its poor interfacial behavior on the hydrophobic leaf leads to few practical applications. In this study, a vesicle solution by the eco-friendly surfactant, sodium diisooctyl succinate sulfonate (AOT), was prepared as [...] Read more.
Nicotine hydrochloride (NCT) has a good control effect on hemiptera pests, but its poor interfacial behavior on the hydrophobic leaf leads to few practical applications. In this study, a vesicle solution by the eco-friendly surfactant, sodium diisooctyl succinate sulfonate (AOT), was prepared as the pesticide carrier for NCT. The physical chemical properties of NCT-loaded AOT vesicles (NCT/AOT) were investigated by techniques such as dynamic light scattering (DLS), small-angle X-ray scattering (SAXS), and cryogenic transmission electron microscopy (cryo-TEM). The results showed that the pesticide loading and encapsulation efficiency of NCT/AOT were 10.6% and 94.8%, respectively. The size of NCT/AOT vesicle was about 177 nm. SAXS and surface tension results indicated that the structure of the NCT/AOT vesicle still existed with low surface tension even after being diluted 200 times. The contact angle of NCT/AOT was always below 30°, which means it could wet the surface of the cabbage leaf well. Consequently, NCT/AOT vesicles could effectively reduce the bounce of pesticide droplets. In vitro release experiments showed that NCT/AOT vesicles had sustained release properties; 60% of NCT in NCT/AOT released after 24 h, and 80% after 48 h. Insecticidal activity assays against aphids revealed that AOT vesicles exhibited insecticidal activity and could have a synergistic insecticidal effect with NCT after the loading of NCT. Thus, the NCT/AOT vesicles significantly improved the insecticidal efficiency of NCT, which has potential application in agricultural production activities. Full article
(This article belongs to the Special Issue Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers)
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Graphical abstract

15 pages, 8339 KiB  
Article
Tuning of Magnetic Hyperthermia Response in the Systems Containing Magnetosomes
by Matus Molcan, Andrzej Skumiel, Milan Timko, Ivo Safarik, Kristina Zolochevska and Peter Kopcansky
Molecules 2022, 27(17), 5605; https://doi.org/10.3390/molecules27175605 - 31 Aug 2022
Cited by 4 | Viewed by 1192
Abstract
A number of materials are studied in the field of magnetic hyperthermia. In general, the most promising ones appear to be iron oxide particle nanosystems. This is also indicated in some clinical trial studies where iron-based oxides were used. On the other hand, [...] Read more.
A number of materials are studied in the field of magnetic hyperthermia. In general, the most promising ones appear to be iron oxide particle nanosystems. This is also indicated in some clinical trial studies where iron-based oxides were used. On the other hand, the type of material itself provides a number of variations on how to tune hyperthermia indicators. In this paper, magnetite nanoparticles in various forms were analyzed. The nanoparticles differed in the core size as well as in the form of their arrangement. The arrangement was determined by the nature of the surfactant. The individual particles were covered chemically by dextran; in the case of chain-like particles, they were encapsulated naturally in a lipid bilayer. It was shown that in the case of chain-like nanoparticles, except for relaxation, a contribution from magnetic hysteresis to the heating process also appears. The influence of the chosen methodology of magnetic field generation was also analyzed. In addition, the influence of the chosen methodology of magnetic field generation was analyzed. The application of a rotating magnetic field was shown to be more efficient in generating heat than the application of an alternating magnetic field. However, the degree of efficiency depended on the arrangement of the magnetite nanoparticles. The difference in the efficiency of the rotating magnetic field versus the alternating magnetic field was much more pronounced for individual nanoparticles (in the form of a magnetic fluid) than for systems containing chain nanoparticles (magnetosomes and a mix of magnetic fluid with magnetosomes in a ratio 1:1). Full article
(This article belongs to the Special Issue Surfactants with Specific Molecular Architecture as Building Blocks for Nanocarriers)
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