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Search for "surfactant" in Full Text gives 216 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Morphology and properties of pyrite nanoparticles obtained by pulsed laser ablation in liquid and thin films for photodetection
Beilstein J. Nanotechnol. 2025, 16, 785–805, doi:10.3762/bjnano.16.60
- ]. In this work, surfactant-free pyrite nanoparticles are synthesized by employing laser ablation in liquid, with a minor phase of FeS, which originated from the ablation target. Upon film fabrication using laser-processed nanocolloids, pure FeS2 phase is obtained by a sulfurization process. Since PLAL
Colloidal few layered graphene–tannic acid preserves the biocompatibility of periodontal ligament cells
Beilstein J. Nanotechnol. 2025, 16, 664–677, doi:10.3762/bjnano.16.51
- and environmental impact, limiting their practical use [10][11][14]. This has sparked growing interest in more sustainable and biocompatible alternatives. Tannic acid (TA), a naturally derived polyphenolic compound, has shown promise as a bio-derived surfactant for graphene exfoliation [14][15
Aprepitant-loaded solid lipid nanoparticles: a novel approach to enhance oral bioavailability
Beilstein J. Nanotechnol. 2025, 16, 652–663, doi:10.3762/bjnano.16.50
- APT because of the surfactant in the formulations. APT-CD-NP4 showed a better outcome than APT-PX-NP8 because of the influence of β-CD. We propose that the medication has great penetrability in the gastrointestinal tract and would be quickly ingested to the same extent as to which it had been
A formulation containing Cymbopogon flexuosus essential oil: improvement of biochemical parameters and oxidative stress in diabetic rats
Beilstein J. Nanotechnol. 2025, 16, 617–636, doi:10.3762/bjnano.16.48
- -viscosity liquids. SMEDDSs are concentrated microemulsions that contain only the oil phase and the surfactant phase (without water). SMEDDSs can form MEs spontaneously through the addition of water and gentle agitation, such as movement of the gastrointestinal tract, and can be formulated into capsules [26
- phase, and a surfactant phase), transparent appearance, low viscosity, isotropy, Newtonian behavior, and droplet size on a nanometric scale, it can be said that the M7-EOCF formulation is a microemulsion system [30][31]. Antioxidant activity The results of the antioxidant activities of S. Mix (i.e
- the molecular mechanisms involved. Conclusion The selected microemulsion containing the essential oil of Cymbopogon flexuosus (M7-EOCF) was obtained using Eumulgin® CO40 and Tween® 80 as the surfactant phase; it presented itself as a transparent, liquid, and isotropic system, with nanometric droplet
Size control of nanoparticles synthesized by pulsed laser ablation in liquids using donut-shaped beams
Beilstein J. Nanotechnol. 2025, 16, 407–417, doi:10.3762/bjnano.16.31
- most elegant, surfactant-free size quenching method by micromolar anion addition only works for soft Lewis-acid nanoparticle materials, in particular, Au, Pt, and Pd, as the process is driven by anion adsorption Hofmeister effects, but not for oxide or multi-base metal materials such as the Cantor
Engineered PEG–PCL nanoparticles enable sensitive and selective detection of sodium dodecyl sulfate: a qualitative and quantitative analysis
Beilstein J. Nanotechnol. 2025, 16, 385–396, doi:10.3762/bjnano.16.29
- Soni Prajapati Ranjana Singh Department of Biochemistry, King George’s Medical University, Lucknow, India 10.3762/bjnano.16.29 Abstract Sodium dodecyl sulfate (SDS) is a widely used anionic surfactant in laboratory, household, and industrial applications, which ultimately enters the environment
- selectivity and sensitivity for SDS detection, making it a promising analytical tool for rapid and onsite estimation. Keywords: Bradford reagent; environmental monitoring; PEG–PCL nanoparticles; SDS; SDS detection; Introduction Sodium dodecyl sulfate (SDS), or sodium lauryl sulfate, is an anionic surfactant
- been designated as a generally recognized safe (GRAS) ingredient for food applications by the United States Food and Drug Administration (USFDA), as stipulated in 21 CFR 172.822. This anionic surfactant serves dual functions in food processing: as an emulsifying agent and a whipping aid [13]. The
Pulsed laser in liquid grafting of gold nanoparticle–carbon support composites
Beilstein J. Nanotechnol. 2025, 16, 349–361, doi:10.3762/bjnano.16.26
- synthesis–attachment are long preparation times, the generation of hazardous organic solvent and ligand waste [15], and poor electrical contact at the nanoparticle–support interface, particularly for nanoparticles with surfactant-terminated surfaces [16]. Conventionally made nanoparticles rely on
- surfactants for size control [17][18][19]. Nanoparticles prepared by pulsed laser in liquid synthesis are surfactant-free [1], but the same binder strategies are used for nanoparticle–support composites as for conventionally made nanoparticles. Capping ligands and binders hinder intimate contact between
- reactions and can create unwanted side products [7]. Long-term surfactant stability and associated catalyst agglomeration or detachment are another issue. Post-synthetic attachment of catalyst nanoparticles is poorly scalable, creates large amounts of organic hazardous waste, and results in wastage of
Fabrication and evaluation of BerNPs regarding the growth and development of Streptococcus mutans
Beilstein J. Nanotechnol. 2025, 16, 308–315, doi:10.3762/bjnano.16.23
- of nanoparticles, and preserves the sterility of the material [19][20]. In this study, sodium dodecyl sulfate, a negative ion surfactant, was adsorbed in the production process onto the surface of nanoparticles, resulting in negatively charged particles. Particles with the same surface charge repel
Preferential enrichment and extraction of laser-synthesized nanoparticles in organic phases
Beilstein J. Nanotechnol. 2025, 16, 254–263, doi:10.3762/bjnano.16.20
- ) functionalization of the nanoparticles have been observed, which ultimately should affect their lipophilicity and, hence, colloidal stability in apolar or polar solvents. Two-phase liquid systems and the possibility to transfer the surfactant-free nanoparticles from one liquid phase into another remain practically
Nanoarchitectonics with cetrimonium bromide on metal nanoparticles for linker-free detection of toxic metal ions and catalytic degradation of 4-nitrophenol
Beilstein J. Nanotechnol. 2024, 15, 1312–1332, doi:10.3762/bjnano.15.106
- environments or functional groups [3]. Surfactants bind to metal surfaces and create a stable colloidal solution by preventing the nanoparticles from aggregation or clustering [4]. CTAB is a widely used cationic surfactant that provides nanoparticle ionic stability and anisotropy [5]. Although CTAB delivers
- length) and AuNR2 (longer length) were centrifuged at 16,000g and 12,000g for 20 min, respectively, to remove excess of surfactant and any impurities. Characterization of CTAB-capped isotropic and anisotropic metal nanoparticles The plasmonic properties of the synthesized isotropic and anisotropic metal
- chose bare nanospheres of gold/silver and compared them to the CTAB-capped metal nanoparticles [31]. Results and Discussion Figure 1a shows the synthesis of isotropic and anisotropic metal nanoparticles using CTAB as surfactant. Silver and gold nanospheres, along with nanorods of different lengths were
Unveiling the potential of alginate-based nanomaterials in sensing technology and smart delivery applications
Beilstein J. Nanotechnol. 2024, 15, 1077–1104, doi:10.3762/bjnano.15.88
Therapeutic effect of F127-folate@PLGA/CHL/IR780 nanoparticles on folate receptor-expressing cancer cells
Beilstein J. Nanotechnol. 2024, 15, 954–964, doi:10.3762/bjnano.15.78
- [1][2][3][4][5]. In the study, we employed two methods, namely, single emulsion–evaporation and nanoprecipitation–diffusion, using F127 as a surfactant. The nanoparticles formulated by the emulsion–evaporation approach were not uniform and tended to aggregate (data not shown), while the nanoparticles
Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels
Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56
- hydrogels is not well reported. In this study, nanomakura-shaped anisotropic gold nanoparticles (AuNMs) were synthesized via a surfactant-assisted seed-mediated protocol. Quaternary cationic surfactants having variable carbon tail length (n = 16, 14, 12) were used as capping for tuning the plasmon peak of
- photothermal conversion was exclusively assigned to morphological features (i.e., nanoparticles of higher aspect ratio showed higher temperature change and vice versa irrespective of the surfactant used). To enable biofunctionality and stability, we used kappa-carrageenan- (k-CG) based hydrogels for
- -AuNM > MTAB-AuNM > DTAB-AuNM. However, the inflection point at 520–530 nm is similar for all three nanoparticle types with different capping. Table 1 clearly shows the positive zeta potential indicating a positive charge on the hydrodynamic surface which is well known in the case of surfactant-capped
Laser synthesis of nanoparticles in organic solvents – products, reactions, and perspectives
Beilstein J. Nanotechnol. 2024, 15, 638–663, doi:10.3762/bjnano.15.54
- structures on top of surfactant-free gold, silver, and copper nanoparticles after adding polyynes, while Zhang et al. performed ablation of silver in acetone with long-term storage, which resulted in shape alteration, size separation, and changes in the carbon shells. As such, molecular hydrocarbons with
Photocatalytic degradation of methylene blue under visible light by cobalt ferrite nanoparticles/graphene quantum dots
Beilstein J. Nanotechnol. 2024, 15, 475–489, doi:10.3762/bjnano.15.43
- the most important soft-magnetic ferrite materials because of its ferromagnetic properties, high magnetic and thermal stability, low conductivity, and anisotropy [6]. The controllable synthesis of spherical CF nanoparticles from corresponding salts and Arabic gum as surfactant agent using a
Heat-induced morphological changes in silver nanowires deposited on a patterned silicon substrate
Beilstein J. Nanotechnol. 2024, 15, 435–446, doi:10.3762/bjnano.15.39
- , after depositing NWs onto a substrate, heat treatment at temperatures around a few hundred degrees Celsius is often employed to eliminate the surfactant used during synthesis [18][19]. The melting temperature of silver is 962 °C, which is significantly higher than the temperatures required to remove
Potential of a deep eutectic solvent in silver nanoparticle fabrication for antibiotic residue detection
Beilstein J. Nanotechnol. 2024, 15, 426–434, doi:10.3762/bjnano.15.38
- to form hydrogen bonds. The DES acts as a surfactant helping to stabilize Ag NPs. The rod-like appearance with 122.6 nm average length and small crystals on the surface of Ag NPs crucially contribute to strengthening the LSPR phenomenon thanks to the lightning rod effect [42]. As reported by other
Classification and application of metal-based nanoantioxidants in medicine and healthcare
Beilstein J. Nanotechnol. 2024, 15, 396–415, doi:10.3762/bjnano.15.36
- : (1) nanoliposomes, which are a nanoscale bilayer lipid vesicle [132]; (2) nanocapsules, which consist of an inner aqueous core surrounded by a nontoxic polymeric membrane [133]; (3) solid lipid nanoparticles, which consist of a solid lipid core stabilized by a surfactant [134]; and (4) nanocrystals
Nanomedicines against Chagas disease: a critical review
Beilstein J. Nanotechnol. 2024, 15, 333–349, doi:10.3762/bjnano.15.30
- the cumulative dose of BNZ would reduce its toxicity without losing effectiveness [48], BNZ has recently been formulated as nanocrystals (NCs). The solubility of BNZ formulated as nanocrystals prepared by nanoprecipitation using the non-ionic surfactant poloxamer 188 as a stabilizer (BNZ-NC) was
Nanocarrier systems loaded with IR780, iron oxide nanoparticles and chlorambucil for cancer theragnostics
Beilstein J. Nanotechnol. 2024, 15, 180–189, doi:10.3762/bjnano.15.17
- approach employing 3% PVA as the surfactant was suitable for encapsulating iron oxide nanoparticles, CHL, and IR780, which created stable nanoparticles with the desired size. Additionally, it was documented that nanoparticles with a hydrodynamic size above 100 nm are incapable of traversing the endothelium
Modification of graphene oxide and its effect on properties of natural rubber/graphene oxide nanocomposites
Beilstein J. Nanotechnol. 2024, 15, 168–179, doi:10.3762/bjnano.15.16
- agent and SDS as a surfactant. About 80 g of HANR (60% DRC) was incubated with 80 g of water containing 1.6 g of SDS and 0.16 g of urea for 1 h before the 1st centrifugation at 10,000 rpm at 15 °C for 30 min. The cream recovered after centrifugation was redispersed in 80 g of water containing 0.8 g SDS
Development and characterization of potential larvicidal nanoemulsions against Aedes aegypti
Beilstein J. Nanotechnol. 2024, 15, 104–114, doi:10.3762/bjnano.15.10
- HLB, one can obtain the nanoemulsion with the smallest droplet size, leading to more stable formulations [20]. The rHLB is usually determined by preparing NEs with different ratios of surfactant blends and choosing the most stable formulation to determine the rHLB of the oil phase [21
- the best ratio between two surfactants, one more lipophilic and one more hydrophilic, which will be necessary to obtain a stable NE [18]. The rHLB of myrcene and cymene was determined using a mixture of Span 80 (lipophilic) and Tween 20 (surfactant). At a time of 24 h after preparation, formulations
- parameters throughout the analyzed period (60 days) (Table 1). For this reason, the formulation with HLB 15 was the formulation chosen as the rHLB of cymene. After 24 h, the myrcene formulations with lower HLB values (10–11), that is, a greater amount of the surfactant (Tween 20) plus lipophilic (Span 80
Fluorescent bioinspired albumin/polydopamine nanoparticles and their interactions with Escherichia coli cells
Beilstein J. Nanotechnol. 2023, 14, 1208–1224, doi:10.3762/bjnano.14.100
- concentration for further experiments. During the freeze-drying process, BSA/PDA NPs acted as surfactant and were located around water droplets when the water was rapidly sublimated, which resulted in the formation of a foam (Supporting Information File 1, Figure S1a). After freeze-drying, the foam could be
Nanostructured lipid carriers containing benznidazole: physicochemical, biopharmaceutical and cellular in vitro studies
Beilstein J. Nanotechnol. 2023, 14, 804–818, doi:10.3762/bjnano.14.66
- delivering active principles [19]. SLNs comprise a lipid core, solid at 25 °C, stabilized by steric effects with a surfactant. The addition of small amounts of a liquid lipid at 25 °C leads to the improvement of SLNs in terms of sustained drug release and encapsulation efficiency (EE%), enabling the
- , which could be referred to the melting points of the lipid and the surfactant, respectively. This suggests that no other endothermic changes occur to the formulation constituents or its load during the high-energy sonication procedure. A peak matching the phase transition peak of BNZ did not appear in
- bulk material, considering the disarrangement caused by the incorporation of the drug and the surfactant. For that reason, it might require less energy to melt in comparison to the pure crystalline substance [25]. Thermogravimetric curves of myristyl myristate, poloxamer 188, and BNZ showed one thermal
Silver-based SERS substrates fabricated using a 3D printed microfluidic device
Beilstein J. Nanotechnol. 2023, 14, 793–803, doi:10.3762/bjnano.14.65
- of nanoparticles. Ag NPs were created by reducing AgNO3 solution with NaBH4 as a reducing agent and TCD as a stabilizer [43][44]. Mineral oil served as a continuous phase when combined with the surfactant Span 80 (2% w/v). To prevent droplets from coalescing in the microchannel, Span 80 was added to
- syringe pumps (NE-300 InfusionONE Syginge Pump, USA) were used to inject mineral oil mixed with the surfactant Span 80 (2% w/v), solution (a), and solution (b) into the droplet-based microfluidic system at flow rates of 20 and 80 µL·min−1, respectively. The as-synthesized colloidal solution of Ag NPs was
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