Combining physical vapor deposition structuration with dealloying for the creation of a highly efficient SERS platform

• Adrien Chauvin,
• Walter Puglisi,
• Damien Thiry,
• Cristina Satriano,
• Rony Snyders and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 83–94, doi:10.3762/bjnano.14.10

• tuning deposition (i.e., the alloy chemical composition) and dealloying (i.e., dealloying media) parameters to reach the best SERS properties. These are reported for samples dealloyed in HCl and with 30 atom % of silver at the initial state with a detection limit down to 10−10 mol·L−1 for a solution of

• SERS properties of the nanoporous structure. Using scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) the morphology and surface composition of each nanoporous structure were respectively evaluated and used to describe the SERS properties of the samples. Results and

• was studied. For this purpose, the initial alloy composition was tuned at 18, 30, and 36 atom % of Ag. For sake of simplicity, the samples with 18, 30, and 36 atom % of Ag at the initial state will be denoted as AlAg18, AlAg30, and AlAg36, respectively. These concentrations were selected to avoid the

Liquid phase exfoliation of talc: effect of the medium on flake size and shape

• Samuel M. Sousa,
• Helane L. O. Morais,
• Joyce C. C. Santos,
• Ana Paula M. Barboza,
• Bernardo R. A. Neves,
• Elisângela S. Pinto and
• Mariana C. Prado

Beilstein J. Nanotechnol. 2023, 14, 68–78, doi:10.3762/bjnano.14.8

• phyllosilicate group [12]. Phyllosilicates are crystalline minerals with a basic Si2O5 composition that exhibit a layer structure, making them ideal candidates for mechanical exfoliation. Talc already has several industrial applications [12], ranging from polymer and ceramics fillers [13][14][15][16] to

• and can leave residues on exfoliated flakes. Although fundamental to LPE, the role of the concentration and chemical composition of the exfoliation medium is still not fully understood [6]. Bearing that in mind, we also tested SC at a much lower concentration of 1 mg/mL. The critical micelle

• obtaining information on thousands of flakes and using appropriate statistical descriptions to analyze the data. Experimental Materials. Talc was obtained through a donation of a sample from Minas Gerais state, Brazil. X-ray diffraction (XRD) was performed to characterize the sample composition. The rock

Solvent-induced assembly of mono- and divalent silica nanoparticles

• Bin Liu,
• Etienne Duguet and
• Serge Ravaine

Beilstein J. Nanotechnol. 2023, 14, 52–60, doi:10.3762/bjnano.14.6

• deposition on TEM grids. Co-assembly of one- and two-patch silica nanoparticles The incubation of the nanoparticles in a 7:3 (vol/vol) THF/salty water mixture was carried out in 15 mL tubes under rolling motion at 60 rpm and at room temperature. The composition of the mixtures is given in Table 1

Gap-directed chemical lift-off lithographic nanoarchitectonics for arbitrary sub-micrometer patterning

• Chang-Ming Wang,
• Hong-Sheng Chan,
• Chia-Li Liao,
• Che-Wei Chang and
• Wei-Ssu Liao

Beilstein J. Nanotechnol. 2023, 14, 34–44, doi:10.3762/bjnano.14.4

• the surface chemical composition after each intermediate step in the CLL process (Figure 1B). As expected, prominent peaks indicating the presence of C–H and C–O bonds can be observed for substrates covered with MCU SAM, and a spectrum with similar peaks is obtained after partial SAM removal with an

The influence of structure and local structural defects on the magnetic properties of cobalt nanofilms

• Alexander Vakhrushev,
• Aleksey Fedotov,
• Olesya Severyukhina and
• Anatolie Sidorenko

Beilstein J. Nanotechnol. 2023, 14, 23–33, doi:10.3762/bjnano.14.3

• nanomaterial arising from its production are important tasks, often closely related to the composition of the sample in question. In this paper, we propose one mathematical model to investigate the relationship between the material structure and its magnetic properties. Mathematical modeling is used to

• manufacturing method, and an approximate composition are proposed on the basis of already existing technologies. The conceptual model for our study is based on a sample whose structure and composition is shown in the upper right part of Figure 1. At the next development stage, the technological processes of

• problem of obtaining clearly separated contact layers is highly relevant. Using simulations, it was demonstrated that optimization of the nanofilm interface can be obtained either by introducing additional intermediate thin layers neutral to the original composition, such as aluminum oxide, or by

Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition

• Mykhailo Nahorniak,
• Pamela Pasetto,
• Jean-Marc Greneche,
• Volodymyr Samaryk,
• Sandy Auguste,
• Anthony Rousseau,
• Nataliya Nosova and
• Serhii Varvarenko

Beilstein J. Nanotechnol. 2023, 14, 11–22, doi:10.3762/bjnano.14.2

• , and composition via several techniques, such as transmission electron microscopy, dynamic light scattering, thermogravimetric analysis, Fourier-transform infrared spectroscopy/attenuated total reflectance, 57Fe Mössbauer spectroscopy, and X-ray diffraction. The effect of unsaturated oleic (OA) and

• , studying the morphology and phase composition of iron-oxide-based nanoparticles is a critical issue. Nevertheless, magnetite and maghemite particles remain the most commonly used nanoparticles in biomedical applications. However, it must be noted that magnetite nanoparticles undergo rapid oxidation in air

• disadvantages. One of the essential issues in many biomedical applications is the synthesis of magnetic nanoparticles with uniform size, chemical composition, and superparamagnetic properties. These requirements can be met by applying thermal decomposition, which is based on the decay of organic iron salts with

Observation of collective excitation of surface plasmon resonances in large Josephson junction arrays

• Roger Cattaneo,
• Mikhail A. Galin and
• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2022, 13, 1578–1588, doi:10.3762/bjnano.13.132

• interjunction interaction. Samples We study arrays of Nb/NbxSi1−x/Nb JJs fabricated on oxidized Si substrates and connected in series by Nb electrodes. The NbxSi1−x interlayer with the composition x ≃ 0.14 was deposited by co-sputtering from Nb and Si sources. Details about the fabrication procedure can be

A TiO₂@MWCNTs nanocomposite photoanode for solar-driven water splitting

• Anh Quynh Huu Le,
• Ngoc Nhu Thi Nguyen,
• Hai Duy Tran,
• Van-Huy Nguyen and
• Le-Hai Tran

Beilstein J. Nanotechnol. 2022, 13, 1520–1530, doi:10.3762/bjnano.13.125

• longer wavelength [26]. Accordingly, the low bandgap of TiO2@MWCNTs indicates improved visible-light absorption. XRD analysis is performed to confirm the crystalline structure and phase composition of TiO2, MWCNTs, and the TiO2@MWCNTs nanocomposite as described in Figure 7. Diffraction peaks at 26.1° and

Hydroxyapatite–bioglass nanocomposites: Structural, mechanical, and biological aspects

• Olga Shikimaka,
• Mihaela Bivol,
• Bogdan A. Sava,
• Marius Dumitru,
• Christu Tardei,
• Beatrice G. Sbarcea,
• Daria Grabco,
• Constantin Pyrtsac,
• Daria Topal,
• Andrian Prisacaru,
• Vitalie Cobzac and
• Viorel Nacu

Beilstein J. Nanotechnol. 2022, 13, 1490–1504, doi:10.3762/bjnano.13.123

• investigated. It was found that all of these factors affect the final composition and microstructure, especially, porosity, which shows significantly lower values for HAP-based composites than for HAG-based ones and higher values for higher glass content. This, in turn, has an impact on the microhardness

• composition of bone, has a low resorption in physiologic environment and, therefore, does not form a tough bond with the bone [2]. The development of hydroxyapatite–bioglass (HA-BG) composites aimed to overcome this problem [3][4][5]. In these composites, the biocompatibility of HA is combined with the

• bioactivity of the glass, which has a higher dissolution rate and promotes the formation of a carbonated hydroxyapatite (CHA) layer on its surface, which is responsible for implant–bone bonding [6]. The composition of the most famous bioglass, 45S5 Bioglass [7], includes the principal elements of the bone, Ca

Structural studies and selected physical investigations of LiCoO₂ obtained by combustion synthesis

• Monika Michalska,
• Paweł Ławniczak,
• Tomasz Strachowski,
• Adam Ostrowski and
• Waldemar Bednarski

Beilstein J. Nanotechnol. 2022, 13, 1473–1482, doi:10.3762/bjnano.13.121

• solution combustion method, and the effects of the annealing temperature (450–900 °C) on structure and composition were investigated using various methods, including XRD, SEM, EPR, and electrical studies. It was found that, as the process temperature increases, the value of the specific surface area

Rapid and sensitive detection of box turtles using an electrochemical DNA biosensor based on a gold/graphene nanocomposite

• Abu Hashem,
• M. A. Motalib Hossain,
• Ab Rahman Marlinda,
• Mohammad Al Mamun,
• Khanom Simarani and
• Mohd Rafie Johan

Beilstein J. Nanotechnol. 2022, 13, 1458–1472, doi:10.3762/bjnano.13.120

• effectiveness of DNA hybridisation. The hybridisation temperature is affected by a variety of factors, including the length of the DNA sequences, nucleotide base composition (GC content), and concentration of salts used in buffer. Different researchers reported different hybridisation temperatures. Among them

Facile preparation of Au- and BODIPY-grafted lipid nanoparticles for synergized photothermal therapy

• Yuran Wang,
• Xudong Li,
• Haijun Chen and
• Yu Gao

Beilstein J. Nanotechnol. 2022, 13, 1432–1444, doi:10.3762/bjnano.13.118

• scalable. Therefore, we chose method A to prepare AB-LNPs for further studies. Optimizing composition to prepare AB-LNPs The properties of Au-LNPs were closely related to the DSPE-DTPA/Au3+ molar ratio [8]. Mean particle size and PDI of Au-LNPs varied with the change of the DSPE-DTPA/Au3+ molar ratio. No

• composition optimizing. The particle size and PDI of AB-LNPs were closely related to the DSPE-DTPA/BDP molar ratio (Table 1). With the increase of the DSPE-DTPA/BDP molar ratio, the particle sizes and PDIs of AB-LNPs decreased first and then increased. The optimal DSPE-DTPA/Au3+/BDP molar ratio is 2:1:1. The

Enhanced electronic transport properties of Te roll-like nanostructures

• E. R. Viana,
• N. Cifuentes and
• J. C. González

Beilstein J. Nanotechnol. 2022, 13, 1284–1291, doi:10.3762/bjnano.13.106

• reagents used were of analytic grade, purchased from Sigma-Aldrich Chemicals Company, and directly used without further purification. Morphology, elemental analysis, and crystal structure Morphology and elemental composition of the as-prepared products were characterized by scanning electron microscopy

• (SEM, FEI Quanta 3D FEG) at an acceleration voltage of 15.0 kV. An EDS system attached to the SEM was employed to analyze the chemical composition. TEM, high-resolution TEM (HRTEM) images, and SAED measurements were carried out in an FEI Tecnai G2-20 S-TWIN operated at 200 kV in a bright-field (BF) TEM

• chemical composition of the nanostructures. This morphology has not been reported for the hydrothermal synthesis of Te nanostructures. Though, similar morphologies have been observed in Te scroll-like nanostructures grown by reflux processes [20] or Te shuttle-like scrolled nanostructures produced by amino

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

• in MEGs due to their rich natural composition. Furthermore, functional groups can easily be added to cellulose-based MEGs to improve the output power. 3.3 Other polymer nanomaterials When an ion concentration gradient is generated in the nanostructure, this gradient distribution makes ions move from

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

• disadvantage is the need for frequent dosing, which can be troublesome. Hence, the treatment regimen is rarely followed, leading to a reduction in the effectiveness of the therapy [58][59]. Therefore, apart from designing the vehicle/base composition, drugs are often incorporated into appropriate carriers or

• composition of the formulation. The most common side effects in this case include local toxicity, tissue damage, eyeball perforation, optic nerve injury, occlusion of central retinal artery or vein, direct retinal toxicity during accidental puncture of the muscles, just to mention the most important [89][90

• modify the previously described concept by adding an additional fast dissolving layer separating the drug tip from the microneedle base. The layer consisted of a porous blend of PVA/PVP. Optimization of the composition and manufacturing process enabled almost immediate release of the tip upon contact

Rapid fabrication of MgO@g-C₃N₄ heterojunctions for photocatalytic nitric oxide removal

• Minh-Thuan Pham,
• Duyen P. H. Tran,
• Xuan-Thanh Bui and
• Sheng-Jie You

Beilstein J. Nanotechnol. 2022, 13, 1141–1154, doi:10.3762/bjnano.13.96

• -transform infrared spectroscopy (FTIR) was used to determine the chemical bond composition of the materials. Differential reflectance spectroscopy (DRS) determined the change in the bandgap of the materials. The elements of the materials were identified by high-resolution X-ray photoelectron spectroscopy

• ) Elemental composition and (b–e) EDS mappings of 3% MgO@g-C3N4. TEM and HR−TEM images of (a, b) MgO@g-C3N4 and (c, d) g-C3N4. The XPS survey (a), HR−XPS C1s (b), N 1s (c), O 1s (d), C 1s (c), and Mg 2s (e, f) of the materials. (a) DRS reflectance spectra, (b) direct bandgap, (c) DRS absorbance spectra, and

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration

• Se-Kwon Kim,
• Sesha Subramanian Murugan,
• Pandurang Appana Dalavi,
• Sebanti Gupta,
• Sukumaran Anil,
• Gi Hun Seong and
• Jayachandran Venkatesan

Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92

• -63 cells, Saos-2 cells, and human osteoblasts, demonstrating its significance in bone tissue engineering [54]. Lemos and colleagues synthesized nanocomposite films comprising chitosan and bioactive glass, as well as a hybrid composition of chitosan and bioactive glass. The chitosan with 20% of

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

• Chen-chen Hao,
• Fang-yan Chen,
• Kun Bian,
• Yu-bin Tang and
• Wei-long Shi

Beilstein J. Nanotechnol. 2022, 13, 1038–1050, doi:10.3762/bjnano.13.91

• , FEI-quanta 200, Japan Electronics, Japan), transmission electron microscopy (TEM, FEI-Tecnai F20, USA) and high-resolution transmission electron microscopy (HRTEM, JEOL 2100F, Japan). The element valence and chemical composition was investigated using X-ray photoelectron spectroscopy (XPS, Axis ultra

Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media

• Iyyappan Madakannu,
• Indrajit Patil,
• Bhalchandra Kakade and
• Kasibhatta Kumara Ramanatha Datta

Beilstein J. Nanotechnol. 2022, 13, 1020–1029, doi:10.3762/bjnano.13.89

• AgCuCo (0.6:1.5:1.5, 2:1:1, and 6:1:1) oxide NPs supported on a reduced graphene oxide (rGO) matrix. Morphology, composition, and functional groups were methodically analysed using various microscopic and spectroscopic techniques. The as-prepared electrocatalysts were employed as cathode substrates for

• -workers reported the ORR activity of Ag–Co NPs dispersed on Vulcan XC72 carbon by incipient-wetness impregnation [22]. In general, the addition of a third metal to a bimetallic composition is considered to be an effective method to augment the absorption energy and improve the kinetics of the ORR [23]. Gu

• electrochemical active surface area (ECSA) of 66.92 m2·g−1 and a mass activity of 40.55 mA·mg−1. We investigated bonding nature, composition, and morphology of the ACC-2 sample using XPS and TEM. The material is electrochemically stable up to 10,000 potential cycles, highlighting the durability of the

Interaction between honeybee mandibles and propolis

• Leonie Saccardi,
• Franz Brümmer,
• Jonas Schiebl,
• Oliver Schwarz,
• Alexander Kovalev and
• Stanislav Gorb

Beilstein J. Nanotechnol. 2022, 13, 958–974, doi:10.3762/bjnano.13.84

• , Altstätten, Switzerland). After the wax was cured, the mandibles were removed from the mould, the cavity was filled with Spurr epoxy resin (Spurr’s low viscosity kit; Plano, Wetzlar, Germany, composition: vinyl cyclohexene dioxide 10 g, diglycidyl ether of polypropylene glycol 6 g, nonenyl succinic anhydride

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

• composition play significant roles. Here, the ability of self-assembly of wax after isolation from the leaves was used to develop a small-scale wax-coated artificial leaf surface with the chemical composition and wettability of wheat (Triticum aestivum) leaves. By thermal evaporation of extracted plant waxes

• (e.g., applied surfactants) interactions on natural leaf surfaces, the chemical composition and the wetting behavior should be the same in both. Therefore, the morphology, chemistry, and wetting properties of natural and artificial surfaces with recrystallized wax structures were analyzed by scanning

• wetting properties of a natural leaf surface. Keywords: recrystallization; surface properties; wax composition; wetting; wheat; Introduction Cuticle One of the largest interfaces on earth is formed by thin layers that are a few nanometers to micrometers thin, namely the wax layers of the plant cuticle

Bioselectivity of silk protein-based materials and their bio-inspired applications

• Hendrik Bargel,
• Vanessa T. Trossmann,
• Christoph Sommer and
• Thomas Scheibel

Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81

• composition, surface structuring on the micro-/nanoscale, and the introduction of low-surface-energy compounds [62]. Various studies demonstrated that the adhesion of Staphylococcus aureus, Pseudomonas aeruginosa, and Escherichia coli (E. coli) bacteria was significantly reduced on superhydrophobic coatings

• proteins (HDPs) was coined [89]. HDPs are rich in cationic amino acids (e.g., arginine and lysine), and amino acids with hydrophobic side chains (e.g., tryptophan, phenylalanine, tyrosine, leucine, isoleucine, and valine). This composition renders them amphiphilic, which is crucial to their mode of action

Numerical modeling of a multi-frequency receiving system based on an array of dipole antennas for LSPE-SWIPE

• Alexander V. Chiginev,
• Anton V. Blagodatkin,
• Dmitrii A. Pimanov,
• Ekaterina A. Matrozova,
• Anna V. Gordeeva,
• Andrey L. Pankratov and
• Leonid S. Kuzmin

Beilstein J. Nanotechnol. 2022, 13, 865–872, doi:10.3762/bjnano.13.77

• of Sciences, GSP-105, Nizhny Novgorod, 603950, Russia Chalmers University of Technology, Department of Microtechnology and Nanoscience - MC2, Gothenburg, SE-412 96, Sweden 10.3762/bjnano.13.77 Abstract Here we present the results of a numerical modeling of mode composition in the constriction of the

• composition in the horn constriction at the incidence plane of a linearly polarized plane wave The parameters of the back-to-back horn are defined in [3]. They consist of two openings and a constriction connecting them, see the details in [3] and a part of the horn in Figure 1. One of the openings defines the

• radiation pattern of the receiving system, and the other is facing the receiving antenna array. The constriction of the horn determines the modal composition of the electromagnetic field passing through the horn. For a given constriction diameter, up to 38 modes of a circular waveguide are propagating in

Ultrafast signatures of magnetic inhomogeneity in Pd_1−xFe_x (x ≤ 0.08) epitaxial thin films

• Andrey V. Petrov,
• Sergey I. Nikitin,
• Lenar R. Tagirov,
• Amir I. Gumarov,
• Igor V. Yanilkin and
• Roman V. Yusupov

Beilstein J. Nanotechnol. 2022, 13, 836–844, doi:10.3762/bjnano.13.74

• domain structures of the films [36]. Smaller-scale fluctuations, due to intrinsic disorder in the alloy composition, still remain unexplored. Finding a way to achieve magnetic uniformity in Pd1−xFex down to the atomic scale is a challenge. One of the options is the selection of the concentration range of

• beam epitaxy (MBE). The films were 20 nm thick, continuous, and smooth monocrystalline layers. The MBE equipment provided uniformity of the film thickness within 3% on the 1″ lateral size. The film composition x was measured in situ using X-ray photoelectron spectroscopy (all from SPECS, Berlin) with a

• amplitude , which strongly depends on the composition of the film (see Figure 4a). Going deeper into the details, the amplitude for the sample with x = 0.038 increases with decreasing temperature in the entire range of 5 K ≤ T < TC. For samples with x = 0.062 and 0.080, this amplitude reaches a maximum