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Search for "zeta potential" in Full Text gives 217 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
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
- ensure efficacy and safety [58]. The most crucial characteristics of nanoparticles are particle size, morphology, zeta potential, and surface area. Morphology of nanoparticles: There are many tools available for determining the morphology of nanomaterials. However, the most commonly used methods are
- a monolayer of gas coverage. The surface area of nanomaterials can also be determined by X-ray photoelectron spectroscopy and secondary ion mass spectroscopy [64][65]. Zeta potential: The zeta potential of nanoparticles can be calculated from the electrophoretic mobility of particles in a particular
- solvent using the Doppler approach, which measures particle velocity as a function of voltage. The determination of the zeta potential is crucial in understanding the mechanism of drug–nanoparticle interactions [66]. In addition to the methods described above, Fourier-transform infrared spectroscopy is
Entry of nanoparticles into cells and tissues: status and challenges
Beilstein J. Nanotechnol. 2024, 15, 1017–1029, doi:10.3762/bjnano.15.83
- different types of material, and even NPs with slight differences in chemical composition but having the same size and zeta potential have turned out to have very different effects on cells. They have for instance very different effects on autophagy in a cellular system [73], and it can be difficult to
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
- scattering (DLS) and zeta potential spectra measurements were carried out in three replicates on a nanoPartica Horiba SZ-100 (Japan) with a scattering angle of 90° at 25 °C to determine the size distribution and stability of the nanocomposites. Scanning electron microscopy (SEM) The F127-folate@PLGA/CHL
- system. A zero charge or a slightly negative charge on the nanoparticles would prevent them from aggregating and interacting with blood proteins [43]. Our nanoparticles’s zeta potential in ten-time diluted PBS was −84.3 ± 2.5 mV and −77.4 ± 3 mV for F127-folate@PLGA/CHL/IR780 and F127@PLGA/CHL/IR780
- folate to the terminal PEO block increased the targeting efficiency. The externalization of the PEO chain would enhance the likelihood of folate binding to the overexpressed folate receptor on the surface of cancer cells. The difference in zeta potential between F127-folate@PLGA/CHL/IR780 and F127@PLGA
A review on the structural characterization of nanomaterials for nano-QSAR models
Beilstein J. Nanotechnol. 2024, 15, 854–866, doi:10.3762/bjnano.15.71
- consequence of the structure of the nanoform (e.g., wavelength or zeta potential, (d) in Figure 3) or whether they represent experimental conditions that contribute to the formation of nanoforms and are the cause of their structure (such as the synthesis medium or the time span between preparation and testing
- involved in the activity modelled or that have a structural origin related to the activity mechanism. A very common property included in several models [23][44][60][68][76] is the zeta potential (a measurement of the charge at the surface of the NMs). The zeta potential value used as a descriptor can be
- measured in a test medium or in different media, such as water at a specific pH or purity level [15][64][77]. A further step, proposed as an example of combining preexisting structure–activity predictive models in networks, is the prediction of the zeta potential in the relevant medium using a model that
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
- . Also, the photothermal responses of the nanoparticles in association with k-CG hydrogels were assessed, indicating their potential in biomedical applications. Furthermore, characterization such as zeta potential, crystallinity, and surface functionalization were investigated through ZetaSizer, X-ray
- diffraction (XRD), and FTIR, respectively, to establish physicochemical properties of the synthesized nanomaterials. Results Synthesis, optical spectroscopy, and zeta potential Anisotropic gold nanoparticles of makura shape were synthesized using seed-mediated approach as shown in Figure 1a. The Au seeds were
- -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
- an accumulation of anions in the Helmholtz layer indicated by zeta potential measurements. Scaramuzza et al., in contrast, investigated non-ionic additives and their influence on structure and composition during the ablation of metastable AuFe alloys [20]. They used ethanol and water as solvents and
Exploring the relationships between physiochemical properties of nanoparticles and cell damage to combat cancer growth using simple periodic table-based descriptors
Beilstein J. Nanotechnol. 2024, 15, 297–309, doi:10.3762/bjnano.15.27
- new ways for modeling the structural properties and bio-toxic effects of NMs. The goal of the study is to construct fully validated property-based models to extract relevant features for estimating and influencing the zeta potential and obtaining the toxicity profile regarding cell damage in the
- treatment of cancer cells. To achieve this, QSPR modeling was first performed with 18 metal oxide (MeOx) NMs to measure their materials properties using periodic table-based descriptors. The features obtained were later applied for zeta potential calculation (imputation for sparse data) for MeOx NMs that
- lack such information. To further clarify the influence of the zeta potential on cell damage, a QSPR model was developed with 132 MeOx NMs to understand the possible mechanisms of cell damage. The results showed that zeta potential, along with seven other descriptors, had the potential to influence
Multiscale modelling of biomolecular corona formation on metallic surfaces
Beilstein J. Nanotechnol. 2024, 15, 215–229, doi:10.3762/bjnano.15.21
- model. Figure 7 shows the output of the UA model for the selected milk proteins on aluminum NPs with a surface size of 80 nm with zeta potential −5 mV at pH 7.0. The heatmaps display the adsorption energies for all values of θ and ϕ. Blue areas with lower energies indicate more favorable orientations of
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
- cells. Hydrodynamic size and zeta potential Dynamic light scattering (DLS) and zeta potential spectra were obtained for three replicates on a nanoPartical Horiba SZ-100 (Japan) with the scattering angle of 90° to determine the size distribution and stability of the nanoparticles. The DLS measurements
- assay, and the absorbance was read at 562 nm (Biotek ELX800, Agilent, USA). Results The morphology, size, and zeta potential of the particles The hydrodynamic size of the three types of NPs (Figure 1A) ranged from 245 ± 11 nm to 246 ± 2 nm with the polydispersity index (PDI) smaller than 0.12, which
- shows the similarity in size and highly homogeneity among the NPs (Table 1). The zeta potential values of the nanoparticles were: PVA@NP: −46 ± 0.7 mV; F127-folate@NP: −67.4 ± 2.3 mV, and F127@NP: −81.13 ± 2.4 mV (Table 1). It was also showed that when the NPs were in cell culture media, their values of
Development and characterization of potential larvicidal nanoemulsions against Aedes aegypti
Beilstein J. Nanotechnol. 2024, 15, 104–114, doi:10.3762/bjnano.15.10
- a hydrodynamic diameter of approximately 98 nm and a zeta potential of −25 mV. The myrcene-based nanoemulsion displayed a hydrodynamic diameter of 118 nm and a zeta potential of −20 mV. Notably, both nanoemulsions demonstrated stability over 60 days, accompanied by controlled release properties and
- , and after 21 days there was no significant change in particle size, nor in polydispersity index (PdI) and zeta potential. The formulation with HLB 15 exhibited smaller particle size and lower PdI and zeta potential than the HLB 14 formulation. Also, there was no significant variation in these
- nanoemulsion comprising 5% p-cymene stabilized with 1% Tween 80, with droplet sizes measuring approximately 150 nm, which maintained its stability for 60 days [31]. The zeta potential is used to predict the stability of dispersions, and its value depends on the physicochemical properties of active ingredients
New application of bimetallic Ag/Pt nanoplates in a colorimetric biosensor for specific detection of E. coli in water
Beilstein J. Nanotechnol. 2024, 15, 95–103, doi:10.3762/bjnano.15.9
- aptamers, which changed to −6 mV. A reduction in the zeta potential of the aptamer-Ag/Pt NPLs revealed that the aptamer was effectively changed on the surface of NPLs. In comparison to E. coli and aptamer-NPLs, the negative charge of aptamer-NPL-E. coli reduced to −10 mV after incubation time, indicating
- /Pt NPL. a) Absorbance spectra of Ag/Pt NPL after the addition of TMB, TMB and H2O2, NPL, and aptamer-NPL in the presence of TMB-H2O2. b) Image related to the color change of the proposed NPL, c) the zeta potential of NPL, aptamer-NPL, E. coli bacteria, and NPL-E. coli. a) The calibration curve of
Curcumin-loaded nanostructured systems for treatment of leishmaniasis: a review
Beilstein J. Nanotechnol. 2024, 15, 37–50, doi:10.3762/bjnano.15.4
- administration in cutaneous and mucocutaneous leishmaniasis [81]. The systems were produced by homogenization using a vortex mixer. The authors obtained two nanoformulations, which showed droplet size between 26–29 nm, polydispersity index (PdI) lower than 0.2, and zeta potential between −3.6 and −4.4 mV. The
- , PdI <0.2, zeta potential of + 35 mV, and an entrapment efficiency of 92%. Curcumin-entrapped nanoliposomes showed leishmanicidal activity (in vitro) against the promastigotes of Leishmania major, whose IC50 values were 6.41, 3.80, and 2.33 μg/mL for the incubation times of 24, 48, and 72 h
- hydrodynamic mean particle size of 312 ± 1.89 nm, PdI of 0.305 ± 0.17 and zeta potential of −38 ± 0.93 mV. These particles were able to entrap 88% of curc due to the irregular lipid crystal structure of NLCs [53]. The NLCs proved to be safe for macrophages, which promptly internalized the nanostructures, as
Curcumin-loaded albumin submicron particles with potential as a cancer therapy: an in vitro study
Beilstein J. Nanotechnol. 2023, 14, 1127–1140, doi:10.3762/bjnano.14.93
- promising biological properties, particularly antioxidant activity. However, its medical applications are limited due to its low water solubility, bioavailability, and pH-instability. CUR-loaded albumin microparticles (CUR-HSA-MPs) of submicron size in the range of 800 to 900 nm and a zeta potential of −15
- , Table S1). CUR loading did not change significantly the particle size. The particles were quite monodisperse as indicated by the relatively low PDI values. In addition, the zeta potential values of CUR-HSA-MPs (−15.30 ± 0.02 mV) and HSA-MPs (−14.50 ± 0.06 mV) were similar. The zeta potential analysis of
- HSA-MPs reflects the negative charge of the albumin biopolymers [26]. In fact, in the cationic HSA-MPs with negative charges, CUR loading did not alter the zeta potential of CUR-HSA-MPs. Furthermore, particles with negative surface charge exhibit the enhanced permeability and retention (EPR) effect
Experimental investigation of usage of POE lubricants with Al2O3, graphene or CNT nanoparticles in a refrigeration compressor
Beilstein J. Nanotechnol. 2023, 14, 1041–1058, doi:10.3762/bjnano.14.86
- prevent sedimentation as suggested in previous studies [32]. The zeta potential values of nanolubricants containing Al2O3 were also measured and given in Figure 9. Accordingly, it can be said that the stability of nanolubricant samples with Al2O3 is excellent and normal for the lowest mass fraction (ω
- balance. Zeta potential of nanolubricants containing Al2O3 at the lowest and highest mass fractions [21]. Images of the FPS2800 fluid property sensor. P–h diagram of the refrigeration system for validation tests. Measurement of a) density and b) dynamic viscosity of water for validation at 25 °C. Required
Recognition mechanisms of hemoglobin particles by monocytes – CD163 may just be one
Beilstein J. Nanotechnol. 2023, 14, 1028–1040, doi:10.3762/bjnano.14.85
- coprecipitation–crosslinking–dissolution (CCD) are promising as HBOCs. CCD provides particles that are malleable and show a consistent morphology and narrow size distribution, as well as a negative zeta potential [19][31][32][33]. It could be shown that neither NO scavenging nor vasoconstriction can be detected
- determination HbMP suspension was placed in glass capillaries for hematocrit determination and then centrifuged at 15,000g for 10 min. The amount of particle sediment was determined manually, and the remaining suspension was diluted with 0.9% NaCl to a concentration of 2% HbMP. Size, zeta potential, and
- conductivity After dilution of the particle suspension to 0.13% (V/V) with NaCl, the average size and conductivity, as well as the zeta potential of the particles were determined using a zetasizer (zetasizer Nano ZS, Malvern Instruments, Malvern, United Kingdom) with each measurement in triplicate. Hemoglobin
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
- ) and a biphasic drug release profile with an initial burst release followed by a prolonged phase. The hydrodynamic average diameter and zeta potential of NLC obtained by dynamic light scattering were approximately 150 nm and −13 mV, respectively, while spherical and well-distributed nanoparticles were
- mean size, zeta potential, polydispersity index, and %EE of the formulation remained stable for at least six months. The hemolytic effect of the nanoparticles was insignificant compared to that of the positive lysis control. The nanoparticle formulation exhibited similar performance in vitro against T
- ] software showed a mean particle size of 150 ± 13 nm. Accordingly, the hydrodynamic diameter of the nanoparticles measured by dynamic light scattering (DLS) was in the 100–200 nm range (≈150 nm), with a moderate distribution of sizes as indicated by a polydispersity index (PdI) of 0.204. The zeta potential
Silver nanoparticles loaded on lactose/alginate: in situ synthesis, catalytic degradation, and pH-dependent antibacterial activity
Beilstein J. Nanotechnol. 2023, 14, 781–792, doi:10.3762/bjnano.14.64
- Lac/Alg, namely 0.3 (AgNPs@Lac/Alg-0.3) and 0.7 (AgNPs@Lac/Alg-0.7), were selected for further physicochemical characterizations. Physicochemical characterizations The stability and size of the nanocomposites in the colloidal solution were evaluated through zeta potential and DLS measurements at a
- temperature of 25 °C. The results are presented in Figure 3, demonstrating that all the synthesized nanocomposites were stable. The zeta potential values of AgNPs@Lac/Alg-0.3 and AgNPs@Lac/Alg-0.7 were −61.6 mV and −41.0 mV, respectively. These values were lower than that of the blank Lac/Alg nanocomposite
- (−102.7 mV) [37]. The decrease in zeta potential suggests that the presence of AgNPs reduced the negative charge of the nanocomposites, resulting in a decrease in their stability. The DLS data indicated that both nanocomposites exhibited wide size distributions ranging from 40–150 nm, with mean sizes of
Carboxylic acids and light interact to affect nanoceria stability and dissolution in acidic aqueous environments
Beilstein J. Nanotechnol. 2023, 14, 762–780, doi:10.3762/bjnano.14.63
- , distribution, and toxicity of nanoceria within biological systems. Cellular uptake studies of nanoceria in lung adenocarcinoma (A549) cells favored particles with a negative zeta potential. However, positively charged particles resulted in greater bovine serum albumin adsorption. This suggests that surface
Plasmonic nanotechnology for photothermal applications – an evaluation
Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33
Quercetin- and caffeic acid-functionalized chitosan-capped colloidal silver nanoparticles: one-pot synthesis, characterization, and anticancer and antibacterial activities
Beilstein J. Nanotechnol. 2023, 14, 362–376, doi:10.3762/bjnano.14.31
- in the microscope images of Ch/Q- and Ch/CA-Ag NPs in cell medium (see Supporting Information File 1, Figure S1), the stability of the synthesized NPs and how the size changes in cell culture medium compared to water were also evaluated by UV–vis and zeta potential measurements. An increase in the
- culture medium. This reveals the decreasing stability for both Ch/Q- and Ch/CA-Ag NPs in the cell culture medium compared to water, which can be explained by the formation of aggregated structures in the medium. In addition, the stability of the NPs was also determined by zeta potential measurements for
- both water and cell culture medium (with 1/10 dilution). The zeta potential values of Ch/Q- and Ch/CA-Ag NPs in water were found to be 37.1 ± 1.2 and 28.4 ± 2.2 mV, whereas they were −5.58 ± 0.47 and −2.08 ± 0.16 mV in medium (i.e., DMEM without phenol red), respectively. The variation in the zeta
Polymer nanoparticles from low-energy nanoemulsions for biomedical applications
Beilstein J. Nanotechnol. 2023, 14, 339–350, doi:10.3762/bjnano.14.29
- constant over at least three weeks. The ethylcelullose nanoparticles obtained after solvent evaporation displayed a positively charged surface (zeta potential about +22 mV) and their TEM average size was about 40 nm. The nanoparticles were complexed with an antisense phosphorothioate oligonucleotide
- . These nanoparticles featured a negatively charged surface (zeta potential between −30 and −40 mV) resulting from the terminal carboxyl groups of PLGA. The drug loperamide was solubilized in the nanoemulsion droplets so that loperamide-loaded PLGA nanoparticles with a hydrodynamic diameter of ca. 200 nm
- the absolute value of the surface zeta potential as a result of charge screening. Hydrophobic (oleic acid-coated) magnetic nanoparticles have also been incorporated into PLGA nanoparticles prepared from Kolliphor® EL and Polysorbate 80 nanoemulsions [59]. The starting nanoemulsions had an average
Biocatalytic synthesis and ordered self-assembly of silica nanoparticles via a silica-binding peptide
Beilstein J. Nanotechnol. 2023, 14, 280–290, doi:10.3762/bjnano.14.25
- ., Waltham, MA, USA) was used for the quantitative analysis of GC–MS data. The reaction rate of TEOS hydrolysis was calculated according to first-order reaction kinetics [43]. Particle size and zeta potential measurements Measurements were performed using a Zetasizer Nano ZS90 (Malvern Panalytical Ltd
- , asterisk: clusters of approx. 10 nm particles). SEM micrographs of (a, c) single-layer and (b, d) multilayer self-assembled SiO2 particles (insets: corresponding fast Fourier transform diffraction pattern of the images). (e) UV–vis spectrogram of the self-assembled particles on a quartz surface. (f) Zeta
- potential of the particles in deionized water in the presence and absence of the SiBP. (a) Qualitative demonstration of the long-range homogeneity of self-assembly and angular dependence of Bragg reflection of as-synthesized SiO2 particles formed with NH3 + 1 mM SiBP. (b) Qualitative comparison of the long
Nanotechnology – a robust tool for fighting the challenges of drug resistance in non-small cell lung cancer
Beilstein J. Nanotechnol. 2023, 14, 240–261, doi:10.3762/bjnano.14.23
- physicochemical properties (polar headgroup, linker region, and type and length of hydrophobic domain), PEG amount, PEG lipid alkyl length, as well as the physicochemical properties of the LNPs (zeta potential, pKa value, and structure and conformation of the lipid bilayer) will result in improved targeting
Non-stoichiometric magnetite as catalyst for the photocatalytic degradation of phenol and 2,6-dibromo-4-methylphenol – a new approach in water treatment
Beilstein J. Nanotechnol. 2022, 13, 1531–1540, doi:10.3762/bjnano.13.126
- SEM, X-ray diffraction, and ultraviolet–visible (UV–vis) analysis. The XRD and UV–vis results were published in our previous article [17]. We present this data again in this article as it is necessary for the discussion of the results. Zeta potential measurements were also presented in another
- Table 1). As a result, at pH 8 the surfaces of these two magnetite catalysts have opposite charges, which was shown in the zeta potential measurements of the catalysts (−0.37 mV and +14.4 mV for M1 and M2, respectively). These findings are in line with those previously observed by Hou et al. [29] on
- degradation occurs mainly via oxidation, as indicated by comparable rate constants for all the degradation processes studied. In the case of photocatalysis, the degradation rate increases with increasing values of the catalyst’s zeta potential. This indicates that the apparent rate constant values are
Facile preparation of Au- and BODIPY-grafted lipid nanoparticles for synergized photothermal therapy
Beilstein J. Nanotechnol. 2022, 13, 1432–1444, doi:10.3762/bjnano.13.118
- mean particle size and zeta potential of the samples in phosphate-buffered saline (PBS) or in RPMI-1640 medium with 10% FBS over a period of 7 days. Samples were collected at specific time points to monitor the changes in particle size and zeta potential. In vitro drug release properties of AB-LNPs The
- properties of AB-LNPs. Changes of (a) particle size and (b) zeta potential of AB-LNPs in PBS or RPMI-1640 medium supplemented with 10% FBS over a period of 7 days. (c) Drug release profiles of BDP from AB-LNPs in PBS with pH 5.5 and 7.4 with or without exposure to 680 nm laser irradiation (0.5 W/cm2, 1 min
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