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Search for "colloids" in Full Text gives 119 result(s) in Beilstein Journal of Nanotechnology.
Time-resolved probing of laser-induced nanostructuring processes in liquids
Beilstein J. Nanotechnol. 2025, 16, 968–1002, doi:10.3762/bjnano.16.74
- Institute of Technology (KIT), Postfach 3640, D-76021 Karlsruhe, Germany 10.3762/bjnano.16.74 Abstract Laser synthesis and processing of colloids (LSPC) in liquids has gained widespread applications in producing nanomaterials of different classes of solids. While the technical processes in different cases
- within the particle. It was proposed that the solvent molecules directly interact with non-thermal electrons at the particle surface, particularly in very small particles. In fact, the relatively well-defined geometry of NP colloids that leads to excitation localization and uniformity as well as the
- formation threshold as well as bubble sizes [125][128]. Figure 8F shows that bubble size growth with laser fluence can be extracted with good correlation to X-ray results (Figure 8G). Structure formation, such as LAL or LFL in NP colloids and on surfaces, involves all steps of particle heating, melting
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
- further excite the plasma plume, which is believed to promote homogenization of the ablated material. This effect often results in narrower nanoparticle size distributions rather than larger particles [37]. In the reported work also, no significant agglomeration was observed in the colloids, except for
Efficiency of single-pulse laser fragmentation of organic nutraceutical dispersions in a circular jet flow-through reactor
Beilstein J. Nanotechnol. 2025, 16, 711–727, doi:10.3762/bjnano.16.55
- viability even at high curcumin concentrations. Keywords: antioxidant; cannabidiol; curcumin; drug; food additive; low degradation; nanoparticle; pulsed laser ablation in liquids; solubilization; Introduction Laser synthesis and processing of colloids (LSPC) has become increasingly popular over the last
- few decades, as this relatively new fabrication method can be used to produce stable, additive-free colloids of different material classes under high-purity conditions, which are suitable for a wide range of technical applications [1][2][3][4][5]. Pulsed laser ablation (LAL), laser fragmentation (LFL
- colloids, for example, to increase their defect density in favor of electrocatalytic or optical properties without changing their size [6][7][8]. In addition, the acronym PUDEL has recently been used for pulsed laser diffusion enhancement in liquids, which refers to an increase in diffusion without
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
- 400 kHz repetition rate for 2 min along a spiral path with an outer diameter of 10 mm and a scanning speed of 20 m·s−1. The pulse energy was varied in the 50–250 µJ range by a laser attenuator to produce colloids with NP concentrations in the range of several tens of milligrams per liter. HEA NPs were
Pulsed laser in liquid grafting of gold nanoparticle–carbon support composites
Beilstein J. Nanotechnol. 2025, 16, 349–361, doi:10.3762/bjnano.16.26
- that our laser fluence did not enable carbon sublimation. Stable gold colloids have been produced by reactive nanosecond laser irradiation of aqueous [AuCl4]– solutions [29][30]. Colloidal gold nanoparticle formation occurred by nucleation of reduced (metallic) gold atoms [25][31][32]. As in pulsed
Preferential enrichment and extraction of laser-synthesized nanoparticles in organic phases
Beilstein J. Nanotechnol. 2025, 16, 254–263, doi:10.3762/bjnano.16.20
- in liquid; laser synthesis and processing of colloids; phase transfer; size separation; thermomorphic multiphase system; Introduction Laser ablation in liquids (LAL) provides nanoparticles without the need of external surfactants while retaining the initial composition of the educt material in the
- properties and surface chemistry of the gained colloids. The use of organic solvents as liquid may result in reactive LAL processes [1][10] that cause elements from the solvent molecules (and solutes) to be part of the final nanoparticle’s composition. The solvent decomposition induced by laser-based
- states at around 80 °C. While laser-synthesized nanoparticles have been characterized regarding their (surface) oxidation [4][5][7] and carbon shells [7][24] previously, the phase preference of nanoparticles from laser synthesis and processing of colloids in liquid–liquid TMSs is unknown. However, to
Biomimetic nanocarriers: integrating natural functions for advanced therapeutic applications
Beilstein J. Nanotechnol. 2024, 15, 1619–1626, doi:10.3762/bjnano.15.127
- nanotechnology, introduced by Richard Feynman in 1959 during an American Physical Society meeting [1][2], involves the manipulation of matter at the atomic level. The term "nanometer" was initially proposed by Richard Zsigmondy in the context of measuring gold colloids. Nanotechnology is generally defined as the
Effect of wavelength and liquid on formation of Ag, Au, Ag/Au nanoparticles via picosecond laser ablation and SERS-based detection of DMMP
Beilstein J. Nanotechnol. 2024, 15, 1054–1069, doi:10.3762/bjnano.15.86
- was meticulously evaluated by analyzing the ablation rates, surface plasmon resonance peak positions, and particle size distributions of the obtained colloids. The nanoparticles (NPs) were characterized using the techniques of UV–visible absorption, transmission electron microscopy, and energy
- while the laser wavelength was increased. Size reduction was observed when the aqueous NaCl solution was used as a surrounding medium instead of other liquids (DW). In this case, the size increases with an increasing wavelength. The diameters of colloids prepared at a laser wavelength of 1064 nm in DW
- wavelengths (355, 532, and 1064 nm) on the variation of morphological features and yields of colloids obtained through the ablation of Ag, Au, and Ag50Au50 targets conducted in a medium of DW and aqueous NaCl solution using a picosecond laser. Our findings demonstrated that the irradiation laser wavelengths
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
- 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
- 23284, USA 10.3762/bjnano.15.54 Abstract Laser synthesis and processing of colloids (LSPC) is an established method for producing functional and durable nanomaterials and catalysts in virtually any liquid of choice. While the redox reactions during laser synthesis in water are fairly well understood
- reports from Fojtik and Henglein on nanoparticle synthesis [1] and Patil et al. on reactive target modification [2], pulsed laser synthesis and processing of colloids (LSPC) has been shown to be a scalable [3][4][5][6] and versatile technique for nanoparticle synthesis, comprehensively reviewed regarding
- fundamentals and applications [7]. The colloids reported in the literature contain mainly inorganic particles (hence, they are the focus of this review), although the literature on organic particle synthesis has been reported as well, ranging from dyes [8][9] to natural substances [10][11] and drugs [12]. LSPC
Nanoarchitectonics of photothermal materials to enhance the sensitivity of lateral flow assays
Beilstein J. Nanotechnol. 2023, 14, 988–1003, doi:10.3762/bjnano.14.82
- ], Colloids and Surfaces B: Biointerfaces, vol. 186, by V. Shirshahi; S. N. Tabatabaei; S. Hatamie; R. Saber, “Photothermal enhancement in sensitivity of lateral flow assays for detection of E-coli O157:H7”, article no. 110721, Copyright (2019), with permission from Elsevier. (This content is not subject to
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
- stress within biological systems [11]. Nanoceria in plant systems Nanoceria acts as colloids in aqueous environments, in the soil near plant root systems, and within bodily fluids. Acetic, citric, lactic, succinic, and tartaric acid secreted from plant roots are known to complex with metals/metal oxides
Polymer nanoparticles from low-energy nanoemulsions for biomedical applications
Beilstein J. Nanotechnol. 2023, 14, 339–350, doi:10.3762/bjnano.14.29
- cellulose nanoparticles obtained from nanoemulsions with an O/S (ethyl acetate/poly(oxyethylene)(10) oleyl ether) ratio of 70/30 and 90 wt % of water. The ethyl acetate phase contained 4 wt % of ethyl cellulose. Figure 2 was reprinted from [43], Colloids and Surfaces B: Biointerfaces, vol. 145, by G
Solvent-induced assembly of mono- and divalent silica nanoparticles
Beilstein J. Nanotechnol. 2023, 14, 52–60, doi:10.3762/bjnano.14.6
- previous work on the assembly of 1-PSN with larger PPSR ranging from 0.69 to 1.54 in a THF/ethanol mixture has shown that colloids with a low aggregation number (e.g., dimers, trimers, tetramers, and spherical micelles) could be obtained at a low incubation time. Also, the higher the PPSR value, the more
Bioselectivity of silk protein-based materials and their bio-inspired applications
Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81
- , Germany Bavarian Polymer Institute (BPI), University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany Bayreuth Center of Colloids and Interfaces (BZKG), University of Bayreuth, Universitätsstr. 30, 95440 Bayreuth, Germany Bayreuth Center for Molecular Biosciences (BZMB), University of Bayreuth
- obtained from fluorinated silica colloids, thin film deposition of silicone elastomers or nanoengineered superhydrophobic surfaces of Teflon®-coated aluminium [63][64][65]. Superhydrophobic surfaces have also been reported to be unfavorable for mammalian cell attachment and growth. This may be due to the
Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly
Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67
- cubic, and CsCl structures were all available [134]. In particular, the 2D assembly showed significant activity regarding the photooxidation of mustard gas [134]. The specific site of the coordination polymer crystals could be modified to generate patchy colloids. By selectively growing a thin layer of
- function is quite attractive because this function is versatile even for nanoparticles. Electrodes of sodium-ion batteries can be fabricated by using the Ni–CN–Ni colloids as glue. The contribution to the adhesion strength among 2D coordination polymers was generally considered to be van der Waals forces
- bulk crystals. The interesting part of the unique adhesion property is not only to bring new adhesives, but also the opportunity to provide stable assemblies, which can be recognized as colloids in extreme states. These colloids contain water and 2D nanosheets, and the water molecules and the 2D
Bacterial safety study of the production process of hemoglobin-based oxygen carriers
Beilstein J. Nanotechnol. 2022, 13, 114–126, doi:10.3762/bjnano.13.8
- Berlin, Berlin, Germany) for their support in the work with microorganisms and Dr. Dimitriya Borisova (Max-Planck Institute of Colloids and Interfaces, Golm, Germany) for SEM imaging. Funding We acknowledge the financial support from the European Community (EFRE-ProFIT 10139827, 10169193).
Sputtering onto liquids: a critical review
Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2
- surface plays a leading role [79]. Two main models have been actively used to describe the formation of primary metal NPs, namely the La Mer model and the autocatalytic model [80]. Even though both models were proposed decades ago, the colloids community is still arguing which one is better [81][82][83
Use of nanosystems to improve the anticancer effects of curcumin
Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78
- results have been obtained in glutathione-sensitive PEGylated CUR prodrug nanomicelles [76]. Polymeric nanoparticles (PNP). Polymeric nanoparticles are solid colloids with a size of up to 1000 nm; the drug is loaded into the polymeric matrix, preferably using biodegradable polymers [77][78]. If the drug
A review on nanostructured silver as a basic ingredient in medicine: physicochemical parameters and characterization
Beilstein J. Nanotechnol. 2021, 12, 440–461, doi:10.3762/bjnano.12.36
- absorption spectrum. However, by modifying the reaction medium with peroxide, citrate, and PVP they noticed the formation of AgNPs in the form of nanoplates, which had an absorption peak at ≈560 nm [151]. Gustav Mie was the first to rigorously explain the colors exhibited by metal colloids by using Maxwell's
Colloidal particle aggregation: mechanism of assembly studied via constructal theory modeling
Beilstein J. Nanotechnol. 2021, 12, 413–423, doi:10.3762/bjnano.12.33
- and could be expanded upon to fit a range of colloidal systems. Keywords: colloids; constructal law; DLVO theory; interparticle interactions; nanomaterials; self-assembly; tunable systems; Introduction Constructal theory has been used to describe a number of naturally evolving processes/phenomena
A review on the biological effects of nanomaterials on silkworm (Bombyx mori)
Beilstein J. Nanotechnol. 2021, 12, 190–202, doi:10.3762/bjnano.12.15
- µg) did not increase the production of ROS and it was suggested that the its effect on hematopoiesis was self-repaired and the damage to the hematopoietic tissues was limited. Zou et al. [155] studied the efficacy in using silver nanoparticle colloids (AgNPC) to reduce the infection caused by BmNPV
A review on the green and sustainable synthesis of silver nanoparticles and one-dimensional silver nanostructures
Beilstein J. Nanotechnol. 2021, 12, 102–136, doi:10.3762/bjnano.12.9
- method is typically used for the synthesis of stable silver colloids either in solutions or in open air without utilizing any additional reagents [108][112]. AgNPs synthesized with this method are maintained in high purity due to the absence of chemical stabilizers and ligands, which provide NPs with
Thermophoretic tweezers for single nanoparticle manipulation
Beilstein J. Nanotechnol. 2020, 11, 1126–1133, doi:10.3762/bjnano.11.97
- that the thermophoretic tweezers could be widely used as a complementary tool to optical tweezers in biochemical, biological, and colloids research. Experimental By stacking an ordinary 0.15 mm thick glass cover slide on top of a 1 mm thick substrate (sapphire window or a standard glass microscope
Applications of superparamagnetic iron oxide nanoparticles in drug and therapeutic delivery, and biotechnological advancements
Beilstein J. Nanotechnol. 2020, 11, 1092–1109, doi:10.3762/bjnano.11.94
- zeta potential values ranging from −40 to +20 mV and formed stable colloids. The zeta potential and the ligands present at the SPION surface showed equal importance in determining the amount of iron oxide engulfed by the cells [95]. Hydrophobic particles are rapidly recognized and engulfed by the
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