Application of nanoarchitectonics in moist-electric generation

• Jia-Cheng Feng and
• Hong Xia

Beilstein J. Nanotechnol. 2022, 13, 1185–1200, doi:10.3762/bjnano.13.99

• the solution and was moved vertically. The electrical output signal was about 60 mV and 4 μA (Figure 2a,b). Yin’s research group also studied the voltage response of graphene layers to moving droplets [34], and the variables in the experiment included the number of graphene layers, droplet size, and

• energy from the movement of water droplets and provides a 3 V, 2 μA instantaneous electrical output. It is designed as a hydrophobic layer plus a polymeric dielectric layer with an electrode layer for electron flow at the bottom [78]. As shown in Figure 6e and f, the effects of different ions on the

• . (c) A liquid droplet is sandwiched between graphene and a SiO2/Si wafer and is drawn at specific velocities by the wafer. (d) A pulse voltage is generated by continuously falling droplets. (e) Voltage induced by three droplets of different solutions. (f) Fitted slope A = V/v (V of voltage, v of

Microneedle-based ocular drug delivery systems – recent advances and challenges

• Piotr Gadziński,
• Anna Froelich,
• Monika Wojtyłko,
• Antoni Białek,
• Julia Krysztofiak and
• Tomasz Osmałek

Beilstein J. Nanotechnol. 2022, 13, 1167–1184, doi:10.3762/bjnano.13.98

• ]. An alternative to methods using UV or heat is the droplet-born air blowing method (DAB). It is suitable for drug molecules that can be inactivated. In this method, polymer droplets are placed between two sheets. As the sheets are pulled apart, the droplets elongate and the resulting needle-shaped

• left to dry afterwards. The drying procedure can be accelerated with the aid of gas-jet drying. Another technique involves spray coating, which is technologically similar to the coating of oral solid dosage forms. Electrohydrodynamic atomisation (EHDA), in which electrically charged droplets are

• deposited on the microneedle surface, has been mentioned. As in piezoelectric inkjet printing, the droplets are released from the nozzle as a result of the application of an electrical field to a piezoelectric crystal, which distorts and pushes the liquid out. The most important techniques applied in

Design of a biomimetic, small-scale artificial leaf surface for the study of environmental interactions

• Miriam Anna Huth,
• Axel Huth,
• Lukas Schreiber and
• Kerstin Koch

Beilstein J. Nanotechnol. 2022, 13, 944–957, doi:10.3762/bjnano.13.83

• the upper and the lower leaf sides. The deposited water droplets appeared spherical (Figure 7a). The CAs of water ranged between 127.5° ± 13.6° and 147.5° ± 11.7°. The deposited droplets rolled off from all leaves at TAs ranging from 10.8° ± 7.3° up to 29.4° ± 15.6°. The CAH values varied from 8.2

• recrystallized wax (148° ± 4.7°) did not differ from those of the wheat leaves (147.5° ± 11.7°) (Figure 8a). As on clean, non-treated glass, the droplets did not roll off the artificial surfaces with small amounts of wax. Therefore, neither TA nor CAH could be measured on these surfaces. On the artificial

• surfaces with the large amount of wax, the droplets only rolled off at higher TA (38.9° ± 14.6°) than on the wheat leaves (15.7° ± 15.1°). The TA of the artificial surfaces covered with the medium wax mass (14.9° ± 13.8°) was the same as on the wheat leaves (Figure 8b). The CAH of artificial surfaces with

Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly

• Lingling Xia,
• Qinyue Wang and
• Ming Hu

Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67

• alignments. For instance, monodispersed colloidal particles can assemble through the evaporation of droplets [56][57]. The local flow and equilibrium interactions among the particles force the obtained assemblies to have periodic structures. The ordered colloidal crystals can regulate the transmission

• are less periodic than those of isotropic crystals, because the movement of 1D or 2D crystals during evaporation of the droplets is often hindered due to steric effects. Confined assembly helps to optimize the alignment of 1D or 2D crystals by introducing additional flow, that is, shear flow or

• into void-free structures [137]. The unavoidable interparticle voids limit interparticle interactions among the crystals, making the assemblies difficult to control. To solve this problem, assembling was tried in confined spaces, such as droplets, liquid–liquid interfaces, on the surface of substrates

Systematic studies into uniform synthetic protein nanoparticles

• Nahal Habibi,
• Ava Mauser,
• Jeffery E. Raymond and
• Joerg Lahann

Beilstein J. Nanotechnol. 2022, 13, 274–283, doi:10.3762/bjnano.13.22

• , NHS-PEG-NHS, was added to the jetting solution at 10% w/wprotein. Application of a bias (voltage) between the needle and collection tray resulted in a field that distorts the solution meniscus into a Taylor cone. The charged solution was accelerated downward to form droplets. Rapid solvent evaporation

A comprehensive review on electrospun nanohybrid membranes for wastewater treatment

• Senuri Kumarage,
• Imalka Munaweera and
• Nilwala Kottegoda

Beilstein J. Nanotechnol. 2022, 13, 137–159, doi:10.3762/bjnano.13.10

• to the long molecular chains. When the molecular weight is low, instead of thin fibers, droplets of the solution will be ejected, which is a phenomenon known as electrospraying [18]. Along its way to the ground collector, the polymer jet undergoes several fluctuations. The jet will initially travel a

Morphology-driven gas sensing by fabricated fractals: A review

• Vishal Kamathe and
• Rupali Nagar

Beilstein J. Nanotechnol. 2021, 12, 1187–1208, doi:10.3762/bjnano.12.88

• starts drying, evaporation of the solvent causes voids and helps in generating clusters of the solute on the substrate. For smaller pockets of the fluid, which can be regarded as droplets, variation in surface tension or temperature at different interfaces predominantly causes either a surface tension

Use of nanosystems to improve the anticancer effects of curcumin

• Andrea M. Araya-Sibaja,
• Norma J. Salazar-López,
• Krissia Wilhelm Romero,
• José R. Vega-Baudrit,
• J. Abraham Domínguez-Avila,
• Carlos A. Velázquez Contreras,
• Ramón E. Robles-Zepeda,
• Mirtha Navarro-Hoyos and
• Gustavo A. González-Aguilar

Beilstein J. Nanotechnol. 2021, 12, 1047–1062, doi:10.3762/bjnano.12.78

• nanoparticles (50–1000 nm) [61]. They contain crystallized lipid droplets that are solid at room and body temperatures [62][63], with the drug or the molecule of interest loaded into the solid lipid phase [64]. The advantages of SLN include high drug loading capacity, great stability, good biocompatibility, and

Comprehensive review on ultrasound-responsive theranostic nanomaterials: mechanisms, structures and medical applications

• Sepand Tehrani Fateh,
• Lida Moradi,
• Elmira Kohan,
• Michael R. Hamblin and
• Amin Shiralizadeh Dezfuli

Beilstein J. Nanotechnol. 2021, 12, 808–862, doi:10.3762/bjnano.12.64

• been covered in several reviews by Sarvazyan et al. [91][101][112] and Urban et al. [113]. The schematic illustration of this mechanism is presented in Figure 2. Acoustic droplet vaporization Acoustic droplet vaporization (ADV) is an US method wherein superheated liquid micron-sized droplets are

• converted into gas MBs approximately 5–6 times larger in diameter [114]. The pressure needed for converting liquid droplets into gas-filled MBs and also whether the droplets form again depend on parameters such as shape and size of the droplets used and the temperature in the medium [115]. The ADV processes

• to improve the efficiency of HIFU by decreasing the acoustic energy required to cause heating and lesion formation. Xin et al. used pulsed-wave US and continuous-wave US heating to vaporize perfluoropentane (PFP) droplets for local thermal ablation [123]. They reported that different concentrations

Recent progress in actuation technologies of micro/nanorobots

• Ke Xu and
• Bing Liu

Beilstein J. Nanotechnol. 2021, 12, 756–765, doi:10.3762/bjnano.12.59

• provides two functions. The first is as a power engine using triacetin as fuel and achieving particle diffusion through catalytic reaction with it. The second is an active cleaning function that can degrade triglyceride droplets by about 98% within 50 min. This shows great potential for biomedical

• /nanorobots, for example, the flagella or cilia of swimming microorganisms. Behkam and Sitti [45] suspended droplets of bacteria, such as E. coli, and polystyrene in a solution of water and glucose. After absorbing the glucose nutrient, the rotating flagella of the bacteria pushed the droplets forward, and

Physical constraints lead to parallel evolution of micro- and nanostructures of animal adhesive pads: a review

• Thies H. Büscher and
• Stanislav N. Gorb

Beilstein J. Nanotechnol. 2021, 12, 725–743, doi:10.3762/bjnano.12.57

• preparation show that the secretory droplets contain nanodroplets on their surfaces (Figure 8). These results led authors to suggest that the pad secretion is an emulsion consisting of lipoid nanodroplets dispersed in an aqueous liquid. The fluid within the smooth pad contributes to the viscoelastic behaviour

• Clearance Center, Inc.. This content is not subject to CC BY 4.0. Fluid micro- and nanodrops in animal attachment pads. (A) Carbon–platinum replica of frozen and coated droplets of the fly Calliphora vicina in SEM (black arrow indicates the direction of coating). Please note the pattern of nanodrops on the

• surface of the major droplets (Figure 8A is from [3] and was adapted by permission from Springer Nature from “Attachment devices of insect cuticle” by S. N. Gorb, Copyright 2001 Springer Nature. This content is not subject to CC BY 4.0). (B) Menisci formed around single terminal contact elements of the

Nanogenerator-based self-powered sensors for data collection

• Yicheng Shao,
• Maoliang Shen,
• Yuankai Zhou,
• Xin Cui,
• Lijie Li and
• Yan Zhang

Beilstein J. Nanotechnol. 2021, 12, 680–693, doi:10.3762/bjnano.12.54

• energy supplies. Triboelectric nanogenerators (TENGs) were used as electronic skin for pressure detection and material identification [50][51]. Pressure sensors based on piezoelectric nanogenerators (PENGs) were used to detect tiny pressure deviations from water droplets [52][53], wind flow [53][54][55

• novel data source for big data and AI. Especially, TENGs are good candidates for designing AI sensors [66]. TENGs can be used as an energy source for traditional sensors to collect tiny amounts of energy from the environment, such as from liquid droplets [67]. The performance of TENGs can be improved

A review of defect engineering, ion implantation, and nanofabrication using the helium ion microscope

• Frances I. Allen

Beilstein J. Nanotechnol. 2021, 12, 633–664, doi:10.3762/bjnano.12.52

Influence of electrospray deposition on C₆₀ molecular assemblies

• Antoine Hinaut,
• Sebastian Scherb,
• Sara Freund,
• Zhao Liu,
• Thilo Glatzel and
• Ernst Meyer

Beilstein J. Nanotechnol. 2021, 12, 552–558, doi:10.3762/bjnano.12.45

•  1a. Then, by applying a voltage difference, typically 1.2 kV, between the solution and the capillary, droplets of solvent and diluted molecules are created and accelerated towards the capillary, through the differential pumping vacuum system, finally reaching the sample in ultrahigh vacuum. The main

Interface interaction of transition metal phthalocyanines with strontium titanate (100)

• Reimer Karstens,
• Thomas Chassé and
• Heiko Peisert

Beilstein J. Nanotechnol. 2021, 12, 485–496, doi:10.3762/bjnano.12.39

• preparation procedures differ distinctly. For example, the temperature range for Sr segregation reaches from 570 K [22] to 1570 K [23]. In many cases, mixed surface terminations are obtained consisting of multiple islands of dominant terminations or SrO droplets [21][22][24][25]. SrTiO3(100) bulk structures

Colloidal particle aggregation: mechanism of assembly studied via constructal theory modeling

• Scott C. Bukosky,
• Sukrith Dev,
• Monica S. Allen and
• Jeffery W. Allen

Beilstein J. Nanotechnol. 2021, 12, 413–423, doi:10.3762/bjnano.12.33

• -cleaning devices [12]. It was concluded that the maximum collection rate was achieved when the aerosol particles first formed into clusters and then dendrites in order to balance their electrostatic forces. The aggregation of colloidal particles (small particles or droplets typically between 10 nm and 10

The role of gold atom concentration in the formation of Cu–Au nanoparticles from the gas phase

• Yuri Ya. Gafner,
• Svetlana L. Gafner,
• Darya A. Ryzkova and
• Andrey V. Nomoev

Beilstein J. Nanotechnol. 2021, 12, 72–81, doi:10.3762/bjnano.12.6

• , when laser deposition was used, the nanoparticles found in [3] exhibited the FCC structure. In this case, during the deposition, the substrate was bombarded with liquid droplets of a Cu3Au nanoalloy. Once at the substrate, they spread out and acquired a round shape. As a result, after crystallization

• reduce the surface energy of the liquid droplets when they are combined, it is often energetically advantageous to separate them again into several parts. It is clear that the lower the binding energy between the atoms, the greater the extent to which these processes will occur, as observed in the case

• even lower binding energy when compared to the atoms of the copper center. At high temperature values in the synthesis chamber, the influence of all these factors prove that the discharge of the smallest droplets of gold from the surface of a binary cluster can be energetically favorable. Note that the

Analysis of catalyst surface wetting: the early stage of epitaxial germanium nanowire growth

• Owen C. Ernst,
• Felix Lange,
• David Uebel,
• Thomas Teubner and
• Torsten Boeck

Beilstein J. Nanotechnol. 2020, 11, 1371–1380, doi:10.3762/bjnano.11.121

• are fully understood yet, especially regarding metallic fluids, it is clear that the formation of nanometre-sized particles, droplets, and clusters as well as their movement are strongly linked to their wetting behaviour. For this reason, the thermodynamic stability of thin metal layers (0.1–100 nm

• system due to material re-evaporation and Ostwald ripening describes the theoretically predicted and experimentally obtained results. Thus, dewetting phenomena of thin metal layers can be used to manufacture nanostructured devices. From this point of view, the application of gold droplets as catalysts to

• grow germanium nanowires on different substrates is described. Keywords: dewetting; germanium; interfacial energy; Laplace pressure; nanostructure; nanowire; Ostwald ripening; wetting layer; Introduction Wetting phenomena as well as the formation and movement of droplets are essential for numerous

A 3D-polyphenylalanine network inside porous alumina: Synthesis and characterization of an inorganic–organic composite membrane

• Jonathan Stott and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2020, 11, 938–951, doi:10.3762/bjnano.11.78

• ), the model of Wenzel can be applied [55][56][57]. Here we assume a relatively high fraction, f, because no roll off angles or high adhesion properties of the water droplets are observed (see Supporting Information File 1, Figure S5). The morphology of the polymer structure within the pore volume is

Measurement of electrostatic tip–sample interactions by time-domain Kelvin probe force microscopy

• Christian Ritz,
• Tino Wagner and
• Andreas Stemmer

Beilstein J. Nanotechnol. 2020, 11, 911–921, doi:10.3762/bjnano.11.76

• the electrostatic potential above the graphene flake and the SiO2 substrate. The patterns observable on the graphene flake are most likely caused by water droplets, which have formed due to the ambient conditions [34][35]. Small changes in the patterns were observed between two different scans

Transition from freestanding SnO₂ nanowires to laterally aligned nanowires with a simulation-based experimental design

• Jasmin-Clara Bürger,
• Sebastian Gutsch and
• Margit Zacharias

Beilstein J. Nanotechnol. 2020, 11, 843–853, doi:10.3762/bjnano.11.69

• ]. The droplets compete for the tin atoms and oxygen molecules [30]. This results in a locally reduced material concentration in the surrounding area of the catalyst-decorated samples. As seen from the simulations of the volumetric flow (Figure 2), an increased volumetric flow will result in a reduced

• influenced by the NW diameters [33][34]. Due to the reduced volume of the smaller Au droplets, the footprint of these droplets is reduced in comparison to larger Au droplets. Therefore, for the required supersaturation and formation of one lattice plane of the smaller catalyst droplets, less material (tin

• Au droplets dewetted from the previously deposited gold film. By using Au NPs (Ø 80 nm), a pressure reduction by a factor of 10 was necessary to produce laterally aligned NWs. For these samples the density of the catalyst droplets is highly reduced [35] and requires a more precise adjustment of the

Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes

• Wei Fang,
• Liang Yu and
• Lan Xu

Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50

•  22. When hydrophilic CuO and ZnO are loaded on the surface of nanofibers, water droplets can spread into the gaps of the flaky CuO–ZnO structures, leading to the hydrophilic character of the CNFMs. Photocatalytic degradation experiment Recently, researches on the application of CuO–ZnO nanocomposites

Phase inversion-based nanoemulsions of medium chain triglyceride as potential drug delivery system for parenteral applications

• Eike Folker Busmann,
• Dailén García Martínez,
• Henrike Lucas and
• Karsten Mäder

Beilstein J. Nanotechnol. 2020, 11, 213–224, doi:10.3762/bjnano.11.16

• with droplets of very small diameter (<100 nm), we investigated thermotropic phase transitions as an alternative to the standard procedure of high-pressure homogenization. Employing shock dilution with ice-cold water during the phase inversion gives the opportunity to produce nanoemulsions without any

• distributions depending on their lipid:surfactant ratio. Using a nonionic surfactant resulted in an uncharged surface of the emulsion droplets. The nanoemulsion with small particles of 25 nm in diameter showed an slightly increased cytotoxicity in comparison to the barely toxic nanoemulsions with particles of

Formation of metal/semiconductor Cu–Si composite nanostructures

• Natalya V. Yumozhapova,
• Andrey V. Nomoev,
• Vyacheslav V. Syzrantsev and
• Erzhena C. Khartaeva

Beilstein J. Nanotechnol. 2019, 10, 2497–2504, doi:10.3762/bjnano.10.240

• liquid alloy and 2) core–shell and Janus-like nanoparticles made of liquid silicon and copper droplets. We have presented new data on the formation of metal/semiconductor nanoclusters, such as the transition of particles from a core–shell structure to a Janus-like structure starting from the liquid state

• variation of the cooling rate results in large variations of the structure of the final nanoparticles [5], in particular of their phase. Modelling of silicon and copper droplets Here, we have considered the case that the initial objects were liquid droplets of silicon and copper, 1.2 nm in size, located at

• a short distance from each other (Figure 4a). The initial temperature of the droplets is T = 1800 K. The value of the initial temperature was chosen above the melting points (copper melting point TCu = 1356.55 K, silicon melting point TSi = 1688 K) in order to destroy the long-range bonds in the

Coating of upconversion nanoparticles with silica nanoshells of 5–250 nm thickness

• Cynthia Kembuan,
• Maysoon Saleh,
• Bastian Rühle,
• Ute Resch-Genger and
• Christina Graf

Beilstein J. Nanotechnol. 2019, 10, 2410–2421, doi:10.3762/bjnano.10.231

• in polar media is the reverse microemulsion technique [22][23][30][31][32][33][34][35][36][37][38][39][40][41][42][43]. In a reverse microemulsion, the aqueous solution is confined in uniform, nanosized droplets that are stabilized by a surfactant such as a polyoxyethylene (5) nonylphenylether (trade

• name Igepal® CO-520) and distributed in the continuous nonpolar phase [44]. The ratio between the aqueous components and the surfactant determines the size of these droplets [30], which act as nanoreactors. For the polycondensation of precursors such as TEOS, ammonia usually acts as a catalyst [43