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Search for "Ag nanoparticles" in Full Text gives 79 result(s) in Beilstein Journal of Nanotechnology.
Emerging strategies in the sustainable removal of antibiotics using semiconductor-based photocatalysts
Beilstein J. Nanotechnol. 2025, 16, 264–285, doi:10.3762/bjnano.16.21
- capabilities in degrading CIP (82.6% within 2 h) and generating hydrogen from rainwater. The effective separation and mobility of photogenerated charge carriers were credited to the role of Ag nanoparticles as electron mediators. There are some other observations, which are shown below in Table 4. Graphene
Synthesis of silver–palladium Janus nanoparticles using co-sputtering of independent sources: experimental and theorical study
Beilstein J. Nanotechnol. 2024, 15, 808–816, doi:10.3762/bjnano.15.67
- sputtering Ag nanoparticles, only the second magnetron section working to confirm the sputtering of Pd nanoparticles, and both magnetrons working to obtain BNPs of the desired size. Figure 1 shows the nanoparticle size distribution for each experimental condition. The green color profile corresponds to the
- melting temperature and, partly, because the appearance of moisture delays the diffusion of silver atoms. The synthesis of AgPd nanocrystals with sizes ranging from 2.46 to 6.65 nm has been reported for applications in the manufacturing of electronic components [6]. Chu et al. [7] synthesized Pd–Ag
- nanoparticles, by the wet reduction method using palladium and silver hydroxide colloids as precursors, to study hydrogen absorption; the size of these BNPs was 6–7 nm. However, inhomogeneous nanoparticles were obtained because Ag fractions were found on the surface, which were increased by heating the samples
Laser synthesis of nanoparticles in organic solvents – products, reactions, and perspectives
Beilstein J. Nanotechnol. 2024, 15, 638–663, doi:10.3762/bjnano.15.54
- enhanced by the Au nanoparticles resulting from LRL, producing the previously mentioned C1–C5 products. In addition to this, the authors found a difference regarding the nucleation of Ag nanoparticles depending on the used solvent. For the formation of Ag nanoparticles during LRL in isopropyl alcohol, they
Fabrication of nanocrystal forms of ᴅ-cycloserine and their application for transdermal and enteric drug delivery systems
Beilstein J. Nanotechnol. 2024, 15, 465–474, doi:10.3762/bjnano.15.42
- absorber [20]. In addition, silver (Ag) nanoparticles were synthesized from cotton fabrics and exhibited strong inhibition activity against some bacteria [21]. Recently, pure active pharmaceutical ingredient (API) composed of nanocrystals was investigated, as opposed to drug nanocarrier platforms [22
Influence of conductive carbon and MnCo2O4 on morphological and electrical properties of hydrogels for electrochemical energy conversion
Beilstein J. Nanotechnol. 2024, 15, 57–70, doi:10.3762/bjnano.15.6
- ]. Cai et al. found some silver nanoparticles only slightly present in the skeleton of a PVA@DEL composite hydrogel [23]. Most of the Ag nanoparticles were observed in the wall of the hydrogel network. In our case, for the Hgel-MCO-cCB 1:3 sample, when the volume percentage of cCB was 17.1% (Table 3
Silver-based SERS substrates fabricated using a 3D printed microfluidic device
Beilstein J. Nanotechnol. 2023, 14, 793–803, doi:10.3762/bjnano.14.65
- tool for detecting ultralow concentrations of chemical compounds and biomolecules. We present a reproducible method for producing Ag nanoparticles that can be used to create highly sensitive SERS substrates. A microfluidic device was employed to confine the precursor reagents within the droplets
- , resulting in Ag nanoparticles of uniform shape and size. The study investigates the effects of various synthesis conditions on the size distribution, dispersity, and localized surface plasmon resonance wavelength of the Ag nanoparticles. To create the SERS substrate, the as-synthesized Ag nanoparticles were
- aqueous solutions and oil, respectively. Synthesis of silver nanoparticles Different molar ratios of silver nitrate to sodium borohydride were used to produce Ag nanoparticles in the microfluidic device at room temperature, with flow rates of 20 and 80 µL/min for the aqueous solutions and oil
Metal-organic framework-based nanomaterials as opto-electrochemical sensors for the detection of antibiotics and hormones: A review
Beilstein J. Nanotechnol. 2023, 14, 631–673, doi:10.3762/bjnano.14.52
- improved electrochemical performance [63][67]. In a recent study, Tang et al. [29] used an ultrasonication and reduction process to combine nanostructured Ag nanoparticles with a MOF (ZIF-67) to fabricate nanopinna-based composite electrochemical sensors for acetaminophen detection. The results showed a
- wide linear detection range with a detection limit of 0.05 μM. Due to the synergistic effects of the wide porosity and high specific surface area of the MOF and the outstanding catalytic activity and high conductivity of Ag nanoparticles, the hybridisation improved the electrochemical performance of
SERS performance of GaN/Ag substrates fabricated by Ag coating of GaN platforms
Beilstein J. Nanotechnol. 2023, 14, 552–564, doi:10.3762/bjnano.14.46
- to the platform’s surface. The dimensions of these nanoparticles increase with the temperature of the GaN substrate up to 200 °C, and, consequently, their number decreases. The largest Ag nanoparticles reach a diameter of 150–170 nm in the case of the PLD_1_200 sample. An increase in temperature also
- leads to an increase in the degree of crystallization of these Ag nanoparticles. At a temperature of 400 °C, more cubic and better crystallized nanoparticles are visible in the SEM images, but their dimensions are smaller than at 200 °C (Figure 4). The thermodynamic conditions of the Ag layer formation
- favor the crystallization and growth of Ag nanoparticles on the surface of the pillars and at the ends of the spiky structures surrounding them. The Ag nanoparticles formed at the ends of the spiky structures are located at small distances from each other or even coalesce. As a result, a porous, well
Plasmonic nanotechnology for photothermal applications – an evaluation
Beilstein J. Nanotechnol. 2023, 14, 380–419, doi:10.3762/bjnano.14.33
- extinction spectra of nanostructures. Illustrative examples of the absorbance spectra for different morphologies of Ag nanoparticles are shown in Figure 2, elucidating the influence of the same. The extinction spectra (the summation of absorption and scattering spectra) from which the shape effects of
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
- NPs is higher in U-118 MG cells than in ARPE-19 cells at the same concentrations. The quercetin-containing Ag nanoparticles (Ch/Q-Ag NPs) may be accepted as a candidate for use in cancer treatment. Furthermore, the concentration-dependent cell death caused by Ch/CA-Ag NPs in U-118 MG cells is
Combining physical vapor deposition structuration with dealloying for the creation of a highly efficient SERS platform
Beilstein J. Nanotechnol. 2023, 14, 83–94, doi:10.3762/bjnano.14.10
- efficiency compared to that of Au, Ag nanoparticles (NPs) are prone to oxidation. Moreover, they are less thermodynamically stable leading to morphology variation and ultimately to deterioration of their SERS efficiency [13][14]. Besides that, most studies report on the high SERS properties for NPs in
In search of cytotoxic selectivity on cancer cells with biogenically synthesized Ag/AgCl nanoparticles
Beilstein J. Nanotechnol. 2022, 13, 1505–1519, doi:10.3762/bjnano.13.124
- the obtaining of metallic Ag nanoparticles combined with AgCl, where AgNPs were formed by reducing compounds of the extract. Thus, the formation of AgCl was due to the availability of chlorine salts in pineapple peels. The third novelty shown in this work is that the cytotoxic activity of Ag/AgCl
- ] these color changes were also observed during the formation of AgNPs from the Stevia rebaudiana extract. This behavior was attributed to the gradual formation of Ag nanoparticles, and the morphological changes that occur during biosynthesis. It is important to note that temperature has a considerable
- compounds act as reducing agents, as well as to changes in the shape, size, and size distribution of the resulting Ag nanoparticles. Cytotoxic behavior It has been reported that several cytotoxic mechanisms of AgNPs can cause DNA, mitochondrial, and cell membrane damage as well as apoptosis [44]. Here, the
Design of surface nanostructures for chirality sensing based on quartz crystal microbalance
Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100
- nanoparticles [124]. Zhang et al. used ʟ-cysteine modified Au nanoparticles for chiral recognition of carnitine [125]. Jafari et al. used chitosan modified Ag nanoparticles for chiral sensing of tryptophan enantiomers [126]. Niu et al. reported the chiral recognition of tryptophan (Trp) on chiral Au facets
- of metal-based chiral sensing applications. Based on surface modification or induced crystallization, metal nanostructures may bear chiral surfaces for chiral sensing of enantiomers. For example, Zhang et al. achieved chiral recognition of cysteine enantiomers using nucleotide-modified Ag
Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review
Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40
- also benefits the SERS enhancement. Doping zinc oxide–Ag nanoparticles with magnesium also introduces defect sites (surface defects and oxygen vacancies), which form new energy levels below the conduction band of zinc oxide, facilitating the charge transfer mechanism. In this case, besides the charge
A comprehensive review on electrospun nanohybrid membranes for wastewater treatment
Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10
Self-assembly of amino acids toward functional biomaterials
Beilstein J. Nanotechnol. 2021, 12, 1140–1150, doi:10.3762/bjnano.12.85
- nanoparticles (Ag NPs) hold great promise due to their broad-spectrum and robust antimicrobial properties [65]. The main mechanism is that Ag nanoparticles diffuse into cells and destroy cell walls [66]. However, Ag NPs are cytotoxic, which limits their application [67]. Song et al. [68] developed a broad
High-yield synthesis of silver nanowires for transparent conducting PET films
Beilstein J. Nanotechnol. 2021, 12, 624–632, doi:10.3762/bjnano.12.51
- reaction temperature of 160 °C, the AgNO3/PVP ratio has also great effect on the morphology of AgNWs [53]. In our case, a 1:1 ratio of AgNO3/PVP started the growth of Ag nanoparticles, as can be seen in the SEM image in Figure 4a. Adding more PVP to the reaction promotes the formation of AgNWs. A AgNO3/PVP
On the stability of microwave-fabricated SERS substrates – chemical and morphological considerations
Beilstein J. Nanotechnol. 2021, 12, 541–551, doi:10.3762/bjnano.12.44
- additives to fabricate uniform Ag nanoparticles. These include basic aminoacids (such as ʟ-lysine or ʟ-arginine) and soluble starch or other additives, which act as reducing and protecting agents, respectively [22]. In our approach, the monolayer of silver nanoparticles is formed by the reduction of silver
- process. All substrates were characterized before the stability tests and revealed the formation of a reproducible monolayer of nanoparticles on the substrate, which is in line with the previously reported procedure. Typically, the Ag nanoparticles synthesized by the microwave-assisted synthesis approach
- might be related to the fact that the irregularly shaped Ag nanoparticles can be reshaped into more spherical nanoparticles after immersion into ethanol [30]. An evidence for this effect can be found in Figure S3 since after 4 h of immersion into ethanol more spherical nanoparticles were observed. The
Nickel nanoparticle-decorated reduced graphene oxide/WO3 nanocomposite – a promising candidate for gas sensing
Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28
- [42]. With the addition of Ag nanoparticles to a dispersion of SnO2/rGO, the working temperature was dropped from 55 °C to room temperature in the gas sensing of NO2 [43]. (For further examples and comparison with other gas sensors see Table S1 in Supporting Information File 1.) The ternary Ni@rGO/WO3
Oxidation of Au/Ag films by oxygen plasma: phase separation and generation of nanoporosity
Beilstein J. Nanotechnol. 2020, 11, 1608–1614, doi:10.3762/bjnano.11.143
- a fundamental point of view, gold/silver is a peculiar model system to study corrosion processes since gold is a noble metal. Interestingly, by using different types of Au/Ag nanoparticles, Lewis et al. showed how one can control and engineer, at the nanometer scale, the final shape and structure of
Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action
Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129
- -condensation of the vapors on the cold surface of the vacuum reactor. Sergeev et al. [45] obtained Ag nanoparticles with sizes ranging from 20 to 150 nm using this technique. The electrochemical anodization method is based on the reactions that occur between the electrode and the electrolyte. In this method
- addition, with this technique one can control the morphology of the synthesized nanoparticles. For example, while Johans et al. [46] obtained spherical Ag nanoparticles, Galstyan et al. [47] synthesized nanoparticles in the form of elongated aggregates with a chain-like morphology. The hydrolysis technique
Ultrasensitive detection of cadmium ions using a microcantilever-based piezoresistive sensor for groundwater
Beilstein J. Nanotechnol. 2020, 11, 1242–1253, doi:10.3762/bjnano.11.108
- . Results of the SAM detecting cadmium ions The proposed microfluidic platform provides real-time monitoring of Cd(II) in groundwater. We performed the experiment using the coating of cysteamine thiol with cross-linked ᴅʟ-glyceraldehyde (Cys-DL-GC). We have already discussed that the methods based on Au/Ag
- nanoparticles require the laboratory equipment such as fluorescence spectroscopy, which ultimately leads to a non-portable platform. Hence, our primary focus is the selective detection of the Cd(II) using the fabricated portable experimental platform. We used the following experimental procedure. A stock
Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms
Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98
- formation are controversial as the Ag nanoparticles seem to be effective against the Gram-negative but not so much against the Gram-positive strains [6]. The antibacterial properties of a wide range of nanoparticles and their corresponding nanocomposites, such as ZnO [17][18], TiO2 [19][20], Fe3O4 [21][22
Gram-scale synthesis of splat-shaped Ag–TiO2 nanocomposites for enhanced antimicrobial properties
Beilstein J. Nanotechnol. 2020, 11, 1119–1125, doi:10.3762/bjnano.11.96
- decrease in the crystallinity and the appearance of new peaks were observed when the Ag nanoparticles were added. The additional peaks corresponded to Ag at 2θ values of 36.78(103), which is perfectly indexed with the silver lattice planes (JCPDS 04-0783). Importantly, no impurity peaks were observed in
- interactions. In addition, the PVP also acted as a reducing agent and facilitated the formation of small Ag nanoparticles at the surface of the TiO2 spheres to form a splat-shaped structure (Scheme 1). PVP played a significant role in generating these nanocomposites, serving as a growth modifier, stabilizer
- the antibacterial activity. The aim of this study was to improve the antimicrobial activity of the biocompatible TiO2 material by growing the small Ag nanoparticles onto its surface. It is known that the Ag free radicals are used to kill bacteria due to their highly oxidative nature; however, when
Effect of Ag loading position on the photocatalytic performance of TiO2 nanocolumn arrays
Beilstein J. Nanotechnol. 2020, 11, 717–728, doi:10.3762/bjnano.11.59
- volume unchanged. Results and Discussion Figure 1 depicts a schematic diagram of the preparation process of the ACT and AFT nanocolumn arrays (schemes (1) and (2), respectively). In the structure represented in (2), the bottom of the array hinders the dense accumulation of Ag nanoparticles in the
- nanocolums or the formation of agglomerates. Instead, the Ag-filled TiO2 nanocolumn structure (2) is obtained. On the other hand, the Ag-coated structure (1) is formed without the hindrance of the bottom structure, in which the Ag nanoparticles deposit more densely and form larger nanoparticles. The
- Ag deposition thicknesses of 10, 20, and 40 nm, respectively. We can see that, as the thickness of Ag deposition increases, the array of TiO2 is gradually covered until the nanocolumn structure disappears. To observe the distribution of Ag nanoparticles in the AFT nanocolumn array, the AAO template
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