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Search for 青少年白发病基因IRF4_、Bcl-2 卫健委健康委 小荷医典 in Full Text gives 2583 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Beyond biomimicry – next generation applications of bioinspired adhesives from microfluidics to composites

  • Dan Sameoto

Beilstein J. Nanotechnol. 2024, 15, 965–976, doi:10.3762/bjnano.15.79

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  • climbing capabilities of geckos launched over 20 years of intense scientific and engineering efforts to understand and industrially mimic this technology [2][3][4]. Coincidentally, in 2000, the same year that Autumn’s paper was published, the Nobel Prize for physics was awarded to Zhores Alferov and
  • designed biomimetic adhesives were discarded in favor of the more well-known and well-characterized mushroom-shaped fiber structures, and many groups developed similar shapes around the same time [2]. I will not cover the exact mechanisms by which these mushroom shapes have proven effective, as several
  • review articles have already been published on this topic [2][4]. However, for high normal strength and peel strength where directionality or easy off–on performance is not needed, this particular version of the biomimetic fibers tends to perform best. Our unique contributions to these general types of
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Published 05 Aug 2024

Therapeutic effect of F127-folate@PLGA/CHL/IR780 nanoparticles on folate receptor-expressing cancer cells

  • Thi Ngoc Han Pham,
  • Phuong-Thao Dang-Luong,
  • Hong-Phuc Nguyen,
  • Loc Le-Tuan,
  • Xuan Thang Cao,
  • Thanh-Danh Nguyen,
  • Vy Tran Anh and
  • Hieu Vu_Quang

Beilstein J. Nanotechnol. 2024, 15, 954–964, doi:10.3762/bjnano.15.78

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  • nanoprecipitation technique, resulting in small size, high homogeneity, and negative surface charge. Importantly, the folate-targeted nanoparticles demonstrated enhanced uptake and cytotoxicity in folate receptor-positive cancer cell lines (MCF-7 and HepG-2) compared to folate receptor-negative cells (HEK 293
  • ) (PLA) and poly(glycolic acid) (PGA), has been employed in the synthesis of nanoparticles for cancer diagnostics and therapy because of its excellent biocompatibility and biodegradability [1][2][3]. PLGA nanoparticles can be prepared via a variety of techniques, including single emulsion, double
  • ]. It has been found that PLGA may co-encapsulate a range of hydrophobic and hydrophilic compounds, which, because of the core–shell structures, boosts their therapeutic anti-tumor activity [1][2][3][11][26][27][28][29][30][31][32][33]. In this study, we would want to combine all of the advantages of
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Published 31 Jul 2024

Electrospun nanofibers: building blocks for the repair of bone tissue

  • Tuğrul Mert Serim,
  • Gülin Amasya,
  • Tuğba Eren-Böncü,
  • Ceyda Tuba Şengel-Türk and
  • Ayşe Nurten Özdemir

Beilstein J. Nanotechnol. 2024, 15, 941–953, doi:10.3762/bjnano.15.77

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  • delivery systems [1][2][3][4][5]. Because of the structural properties of nanofibers, which enable cell growth and proliferation, their use in tissue engineering, especially regarding bone tissue, is quite common [2]. Nanofiber scaffolds may carry active substances such as cells for tissue repair
  •  2. There are basically four main elements in an electrospinning assembly. These are (i) a high-voltage power source, (ii) a feeding unit (i.e., nozzle, syringe, or metal needle), (iii) a collector (i.e., plate, cylinder, disc, or rotating drum), and (iv) a viscous polymer (melt or solution) in
  • search term “polymeric nanofiber bone regeneration”. Examples of patents for polymeric nanofiber structures patented for use in bone regeneration are tabulated in Table 2. Conclusion Bone is a dynamic structure that has the ability to regenerate continuously and to heal after fractures. However, tumor
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Published 25 Jul 2024

Effects of cutting tool geometry on material removal of a gradient nanograined CoCrNi medium entropy alloy

  • Yu-Sheng Lu,
  • Yu-Xuan Hung,
  • Thi-Xuyen Bui and
  • Te-Hua Fang

Beilstein J. Nanotechnol. 2024, 15, 925–940, doi:10.3762/bjnano.15.76

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  • attention and research [1][2]. Among them, the ternary medium-entropy alloy (MEA) CoCrNi and its derived five-element CoCrFeMnNi HEA [3][4] have been found to exhibit high strength and ductility. Weng et al. used laser-aided additive manufacturing to fabricate a CoCrNi MEA with a perfect combination of
  • simulation, as shown in Figure 1b. Figure 1c shows polycrystalline CoCrNi MEAs with different grain size gradient sizes, including 2-3-4 nm, 5-7-9 nm, and 10-13-15 nm. Figure 1d shows the simulated diamond cutting tool, a rigid body with various rake angles consisting of 14,287–39,156 C atoms. Periodic
  • CoCrNi MEA substrates. The Lennard-Jones (LJ) potential was used to model the interaction among tool and sample atoms, and among the atoms in the tool [12][13][14][15]. The parameters of the LJ potential are displayed in Table 2. The MD cutting simulations were carried out using the large-scale atomic
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Published 23 Jul 2024

Identification of structural features of surface modifiers in engineered nanostructured metal oxides regarding cell uptake through ML-based classification

  • Indrasis Dasgupta,
  • Totan Das,
  • Biplab Das and
  • Shovanlal Gayen

Beilstein J. Nanotechnol. 2024, 15, 909–924, doi:10.3762/bjnano.15.75

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  • dimensions within the range of 1 to 100 nm [2]. The diminutive size of nanoparticles contributes to a significantly high surface area with respect to volume, resulting in enhanced reactivity, improved stability, and augmented functionality. In the field of nanomaterials, ENMOs are a notable subset. These
  • statistical criteria, such as concordance, specificity, and sensitivity, were examined to characterize the model (Table 2). The developed Bayesian model has a fivefold cross-validated ROC of 0.765, indicating the model’s validity. The ROC for the test set is 0.891, indicating an acceptable external validation
  • result. The training set’s statistical results are summarized in Table 2, showing a strong 98% sensitivity, 86.5% specificity, and 93.2% overall concordance. Twenty uptake-promoting (UPp 1–UPp 20) and twenty uptake-impairing (UIp 1–UIp 20) structural features/fingerprints were generated by the Bayesian
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Published 22 Jul 2024

Facile synthesis of Fe-based metal–organic frameworks from Fe2O3 nanoparticles and their application for CO2/N2 separation

  • Van Nhieu Le,
  • Hoai Duc Tran,
  • Minh Tien Nguyen,
  • Hai Bang Truong,
  • Toan Minh Pham and
  • Jinsoo Kim

Beilstein J. Nanotechnol. 2024, 15, 897–908, doi:10.3762/bjnano.15.74

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  • areas, high thermal stability, changeable pore system sizes, and customizable chemical surfaces [1][2][3][4][5][6]. The family tree of MOFs holds giant lineages such as Zeolitic Imidazolate Framework (ZIF), University of Olso (UiO), Material of Institute Lavoisier (MIL), Dresden University of Technology
  • for 2 h, followed by an additional 12 h at 150 °C in a glass tube before naturally cooling to ambient temperature. To assess the adsorbent’s reusability, five cycles of CO2 adsorption and desorption were conducted at 25 °C. The adsorbent was refreshed for 2 h at 100 °C under vacuum for each cycle
  • concentration was incrementally introduced into the reaction system to control the quality of the as-prepared samples. As shown in Figure 2, reflections of crystalline Fe2O3 were detected in the p-Fe2O3 XRD pattern, which are in absolute agreement with the simulated data, including the (220) and (311) planes in
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Published 19 Jul 2024

Water-assisted purification during electron beam-induced deposition of platinum and gold

  • Cristiano Glessi,
  • Fabian A. Polman and
  • Cornelis W. Hagen

Beilstein J. Nanotechnol. 2024, 15, 884–896, doi:10.3762/bjnano.15.73

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  • ) is a nanofabrication technique that allows for the direct writing of three-dimensional nanostructures [1][2][3]. In FEBID, a gaseous precursor, often an organometallic compound, is injected in the vacuum chamber of a scanning electron microscope (SEM), adsorbed on a substrate, and dissociated by a
  • subsequently sonicated for 2 min in acetone and for 2 min in isopropyl alcohol. All depositions were performed with both GIS nozzles inserted. Deposition, imaging, and EDX analysis were performed in immersion mode at a working distance of 5 mm. Deposition conditions In general, the main parameters that control
  • different injection distances. The order in which the gases were introduced into the chamber before the deposition was started did not have an effect on the composition of the deposited material. Both in the case of the Pt GIS being opened 2 min prior to the water GIS and in the reverse case, the same shape
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Published 18 Jul 2024

The effect of age on the attachment ability of stick insects (Phasmatodea)

  • Marie Grote,
  • Stanislav N. Gorb and
  • Thies H. Büscher

Beilstein J. Nanotechnol. 2024, 15, 867–883, doi:10.3762/bjnano.15.72

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  • ]. Research on the time-dependent decline of body functions has often been focused on vertebrates, especially mammals, but insects have found their way into ageing research as well [2][3][4]. They are easy to maintain and have a short lifespan, and changes in their exoskeleton can be easily observed [5]. The
  • process of ageing has been explored most thoroughly in Drosophila melanogaster (Meigen, 1830) and other dipterans, often with special regards to flight [2][4][6][7][8]. Other studies on ageing in insects included economically or ecologically important species, such the silkworm moth Bombyx mori (L., 1758
  • either of the two components of the overall attachment system. The aim of this study was to answer the following research questions: (1) Does the attachment ability of older animals differ from that of younger animals? (2) Do pull-off and traction forces on the same substrates change during age? (3) Does
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Published 15 Jul 2024

A review on the structural characterization of nanomaterials for nano-QSAR models

  • Salvador Moncho,
  • Eva Serrano-Candelas,
  • Jesús Vicente de Julián-Ortiz and
  • Rafael Gozalbes

Beilstein J. Nanotechnol. 2024, 15, 854–866, doi:10.3762/bjnano.15.71

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  • international bodies such as the European Chemicals Agency (ECHA) [2][3]. Unlike QSAR models for discrete organic molecules, QSARs for NMs are still at an early stage, mainly because of the lack of data available regarding their generation [4], but also because of the intrinsic difficulty to characterize the
  • compositions (Figure 2) formed by different parts such as (i) the core (the inner part of the NM and most of its weight), (ii) the shell (the composition of the surface that interacts with the solvent and biological molecules), (iii) impurities or dopants (minor components deposited on the surface or
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Published 11 Jul 2024

Investigation on drag reduction on rotating blade surfaces with microtextures

  • Qinsong Zhu,
  • Chen Zhang,
  • Fuhang Yu and
  • Yan Xu

Beilstein J. Nanotechnol. 2024, 15, 833–853, doi:10.3762/bjnano.15.70

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  • moving animals, such as the “denticles” found on the surface of shark skin, which enable high-speed swimming [2], as well as the texture of bird feathers [3]. The phenomenon of drag reduction can also be observed on the surface of plants. For example, there is a superhydrophobic structure on the surface
  • ]. Lang et al. [8] constructed rectangular and sinusoidal grooves with 2 mm in width, 3 mm in depth, and 1 mm in spacing, thus mimicking the transverse grooves on the surface of dolphin skin. They observed the effect of the grooves on flow separation and boundary layer using digital particle image
  • surfaces. (2) The analysis of drag reduction performance is mostly based on numerical simulation results, with a lack of technology research regarding the processing of microtextures and of analysis of experimental results. On the one hand, the small size of microtextures may lead to significant errors in
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Published 10 Jul 2024

When nanomedicines meet tropical diseases

  • Eder Lilia Romero,
  • Katrien Van Bocxlaer and
  • Fabio Rocha Formiga

Beilstein J. Nanotechnol. 2024, 15, 830–832, doi:10.3762/bjnano.15.69

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  • article collection. Among the articles, an interesting strategy to improve the bioavailability of benzonidazole towards Chagas disease has been presented by Muraca and colleagues, who reported a stable and safe nanostructured lipid formulation with potential effects against Trypanosoma cruzi [2]. In turn
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Published 08 Jul 2024

Intermixing of MoS2 and WS2 photocatalysts toward methylene blue photodegradation

  • Maryam Al Qaydi,
  • Nitul S. Rajput,
  • Michael Lejeune,
  • Abdellatif Bouchalkha,
  • Mimoun El Marssi,
  • Steevy Cordette,
  • Chaouki Kasmi and
  • Mustapha Jouiad

Beilstein J. Nanotechnol. 2024, 15, 817–829, doi:10.3762/bjnano.15.68

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  • ; photodegradation; transition-metal dichalcogenides; Introduction Water contamination has become a pressing global concern, threatening ecosystems, agriculture, and human well-being [1][2]. The massive industrialization has dramatically contributed to water pollution, which has prompted policymakers to put in
  • 284.6 eV (Supporting Information File 1, Figure S1). For the MoS2 scan, the deconvoluted peaks for Mo 3d show peaks centered around ≈230 eV and ≈233.1 eV corresponding to 3d5/2 and 3d3/2 peaks of Mo 3d [27][28][29]. A small peak appearing at around ≈227.2 eV is ascribed to S 2s (Figure 2b) [28]. In
  • addition, the deconvoluted peaks of S 2p appear at ≈162.9 eV and ≈164.1 eV attributed to the S 2p doublet (2p3/2 and 2p1/2) as shown in Figure 3c [30]. High-resolution scans of W 4f and S 2p are shown in Figure 2e and Figure 2f, W 4f shows deconvoluted peaks at around ≈33.3 eV and ≈35.4 eV corresponding to
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Published 05 Jul 2024

Synthesis of silver–palladium Janus nanoparticles using co-sputtering of independent sources: experimental and theorical study

  • Maria J. Martínez-Carreón,
  • Francisco Solís-Pomar,
  • Abel Fundora,
  • Claudio D. Gutiérrez-Lazos,
  • Sergio Mejía-Rosales,
  • Hector N. Fernández-Escamilla,
  • Jonathan Guerrero-Sánchez,
  • Manuel F. Meléndrez and
  • Eduardo Pérez-Tijerina

Beilstein J. Nanotechnol. 2024, 15, 808–816, doi:10.3762/bjnano.15.67

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  • evaporated concurrently in the aggregation region, which results in the formation of nanoparticles with a variety of structural motifs, such as randomly alloyed, core–shell, and Janus nanoparticles [2]. The study of bimetallic nanoparticles (BNPs) is highly interesting for the scientific community because of
  • crossed Ag–Pd interactions [16]. The final structures were used to generate simulated TEM micrographs using the SimulaTEM package [17] and approximated STEM micrographs, with the assumption that the signal intensity, I, of atoms of atomic number Z goes as I = Zn, where n is a number close to 2 [18]. To
  • this paper. Figure 2 shows two TEM micrographs. In Figure 2a, it can be seen that the nanoparticles have a Janus-type structure. Their growth in a preferential orientation in the assembly process enabled the formation of this complex and hierarchical structure. In addition, it is observed that, in the
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Published 04 Jul 2024

Electron-induced ligand loss from iron tetracarbonyl methyl acrylate

  • Hlib Lyshchuk,
  • Atul Chaudhary,
  • Thomas F. M. Luxford,
  • Miloš Ranković,
  • Jaroslav Kočišek,
  • Juraj Fedor,
  • Lisa McElwee-White and
  • Pamir Nag

Beilstein J. Nanotechnol. 2024, 15, 797–807, doi:10.3762/bjnano.15.66

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  • (FEBID). FEBID is an emerging method for the fabrication of 3D nanostructures. It relies on the local decomposition of precursors in the focal area of an electron beam [1][2][3][4]. In the case of deposition of metals, the interaction with the electrons should ideally lead to a cleavage of all metal
  • properties, which could be used in nanosensing applications [9]. Common FEBID precursors for iron are Fe(CO)5, Fe2(CO)9, Fe3(CO)12, and Fe(C5H5)2. The first one, iron pentacarbonyl, has attracted perhaps the highest amount of attention from the point of view of the elementary reaction with electrons. The
  • is difficult to control at low energies below 2 eV. The abundance of electrons below this energy is uncertain since a large fraction of them does not leave the collision region to the Faraday cup, and the energy resolution is also deteriorated. The absolute energy scale of the electron beam was
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Published 03 Jul 2024

Electrospun polysuccinimide scaffolds containing different salts as potential wound dressing material

  • Veronika Pálos,
  • Krisztina S. Nagy,
  • Rita Pázmány,
  • Krisztina Juriga-Tóth,
  • Bálint Budavári,
  • Judit Domokos,
  • Dóra Szabó,
  • Ákos Zsembery and
  • Angela Jedlovszky-Hajdu

Beilstein J. Nanotechnol. 2024, 15, 781–796, doi:10.3762/bjnano.15.65

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  • )/hydroxyapatite in orthopedics [1][2]. Biocompatible polymers are widely used in biomedical fields, such as stents, drug delivery systems in cancer therapy, bone repair, dentistry, joint prostheses, and tissue engineering [2][3][4][5][6]. Polymers have several advantageous properties for these applications as
  • strategies to fight bacterial pathogens with similar effects to antibiotics and silver is essential. In our study, inorganic salts, namely Zn(O2CCH3)2 and Sr(NO3)2, were added to the polymer fibers. These salts possess antibacterial properties and stimulate cell proliferation as well as tissue regeneration
  • ][37]. This study aimed to create a two-component polymer-composite scaffold as a potential wound dressing material by electrospinning, using antibacterial salts (Zn(O2CCH3)2 or Sr(NO3)2) in addition to PSI. We performed the following experiments: physical and chemical characterization of the fibers by
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Published 02 Jul 2024

Exploring surface charge dynamics: implications for AFM height measurements in 2D materials

  • Mario Navarro-Rodriguez,
  • Andres M. Somoza and
  • Elisa Palacios-Lidon

Beilstein J. Nanotechnol. 2024, 15, 767–780, doi:10.3762/bjnano.15.64

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  • ], sensors [2], and biomedical applications [3][4], among other areas [5][6][7][8]. Graphene-related materials [8], transition metal dichalcogenides [9], boron nitride [10], and MXenes [11], among many others, exhibit novel and exotic properties, which markedly differ from their bulk counterparts [12]. This
  • modulation mode (FM-KPFM) with an AC voltage of 700 mV at 7 kHz using platinum-coated silicon tips (Olympus AC240TM-R3, k = 2 N/m and f0 = 70 kHz). Using a dual lock-in amplifier (Zurich instruments, HF2LI), in addition to the KPFM channel, which provides information on the sample's SP, the 2ωelec
  • line profile comprising both types of flake (Figure 1b) reveals a height of approximately 2 nm, larger than the expected nominal heights of ≈0.9 nm for GO and ≈0.3 nm for rGO. Moreover, the rGO flake appears to be slightly thicker than the GO flake, contradicting the anticipated reduction in thickness
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Published 01 Jul 2024

Green synthesis of biomass-derived carbon quantum dots for photocatalytic degradation of methylene blue

  • Dalia Chávez-García,
  • Mario Guzman,
  • Viridiana Sanchez and
  • Rubén D. Cadena-Nava

Beilstein J. Nanotechnol. 2024, 15, 755–766, doi:10.3762/bjnano.15.63

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  • activity of the CQDs in degrading methylene blue was evaluated under both sunlight and incandescent light irradiation, with measurements taken at 20 min intervals over a 2 h period. The CQDs, with sizes ranging from 1–10 nm, demonstrated notable optical properties, including upconversion and down
  • textile industry is a major contributor to water pollution [1][2]. To address this issue, the textile industry must adopt more sustainable practices in water and energy use, develop environmentally friendly dyes, and implement wastewater treatment processes. Conventional wastewater treatment techniques
  • stirred for an additional 10 min. Subsequently, the mixture was transferred to a Teflon-lined stainless steel autoclave, which was sealed under pressure using a manual press. The autoclave was then placed in a convection oven and maintained at 100°C for 2 h. After the specified time had elapsed, the
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Published 25 Jun 2024

Effect of repeating hydrothermal growth processes and rapid thermal annealing on CuO thin film properties

  • Monika Ozga,
  • Eunika Zielony,
  • Aleksandra Wierzbicka,
  • Anna Wolska,
  • Marcin Klepka,
  • Marek Godlewski,
  • Bogdan J. Kowalski and
  • Bartłomiej S. Witkowski

Beilstein J. Nanotechnol. 2024, 15, 743–754, doi:10.3762/bjnano.15.62

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  • -cleaning [1], anti-corrosion [2], and antibacterial [3] coatings. Like other CuO nanostructures, thin films also show potential for applications in photovoltaic cells [4][5], lithium-ion batteries [6], supercapacitors [7], gas sensors [8], and biosensors [9]. Furthermore, the literature reports their
  • procedure are denoted as “1×”, “2×”, and “3×”, depending on the number of HT+RTA cycles. It is worth highlighting that re-executing the hydrothermal processes does not necessitate any supplementary preparation of samples, for example, surface re-nucleation. Measurement equipment CuO thin films were
  • silicon nitride probe, ScanAsyst-AIR (Bruker). Scanning capacitance microscopy (SCM) measurements were conducted in contact mode using a silicon probe coated with a PtIr layer, SCM-PIT-V2 (Bruker). Capacitance measurements were taken with VAC = 2 V and VDC = 1 V applied. The carrier distribution maps at a
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Published 24 Jun 2024

Level set simulation of focused ion beam sputtering of a multilayer substrate

  • Alexander V. Rumyantsev,
  • Nikolai I. Borgardt,
  • Roman L. Volkov and
  • Yuri A. Chaplygin

Beilstein J. Nanotechnol. 2024, 15, 733–742, doi:10.3762/bjnano.15.61

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  • possible to deterministically produce a nanoscale topography on the surface of almost any substrate [1]. FIB milling was originally established in semiconductor technology [2] and materials science applications [3]. Now it is increasingly used for fabrication of complex micro- and nanoscale structures and
  • of them is the flux of sputtered particles. For a multilayer structure, it can be presented by the extension of the well-known expression [21] as where denotes the flux of sputtered atoms of the i-th material with i = 1 for SiO2 and i = 2 for Si. In the case considered, it is equal to where μi = [Yr
  • computational grid. The experimental angular dependences of the sputtering yield [24] and YSi(θ) [34] were used for the calculations of Fsp,i with μi values of 0.15 for SiO2 (i =1) [24] and 0.3 for Si (i = 2) [35]. The function at t=0 was specified by the structure of the Si substrate covered by a SiO2 layer
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Published 24 Jun 2024

Simultaneous electrochemical determination of uric acid and hypoxanthine at a TiO2/graphene quantum dot-modified electrode

  • Vu Ngoc Hoang,
  • Dang Thi Ngoc Hoa,
  • Nguyen Quang Man,
  • Le Vu Truong Son,
  • Le Van Thanh Son,
  • Vo Thang Nguyen,
  • Le Thi Hong Phong,
  • Ly Hoang Diem,
  • Kieu Chan Ly,
  • Ho Sy Thang and
  • Dinh Quang Khieu

Beilstein J. Nanotechnol. 2024, 15, 719–732, doi:10.3762/bjnano.15.60

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  • and urine are a sign of several diseases, such as gout, Lesch–Nyan disease, obesity, diabetes, high cholesterol levels, and kidney diseases [1][2]. Hypoxanthine (6-hydroxypurine, HYP), a purine derivative, is an indicator of hypoxia [3]. A lower HYP concentration in the cerebrospinal fluid of patients
  • with 0.1 M HCl and distilled water until a supernatant with neutral pH was obtained. The solid was dried at 80 °C for 2 h. This product was then mixed with 30 mL of H2O2 (35%, d = 1.11 g·cm3) at 90 °C under magnetic stirring for 1 h to obtain a clear yellow solution of peroxo titanium complexes. The
  • with different TiO2/GQDs ratios were prepared by mixing different volumes of GQDs and peroxo titanium complex suspensions under stirring at 50 °C for 1 h. The samples are denoted as (0:4)TiO2/GQDs; (1:4)TiO2/GQDs; (2:4)TiO2/GQDs; (4:4)TiO2/GQDs; (4:2)TiO2/GQDs; (4:1)TiO2/GQDs; (4:0)TiO2/GQDs. The
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Published 20 Jun 2024

Reduced subthreshold swing in a vertical tunnel FET using a low-work-function live metal strip and a low-k material at the drain

  • Kalai Selvi Kanagarajan and
  • Dhanalakshmi Krishnan Sadhasivan

Beilstein J. Nanotechnol. 2024, 15, 713–718, doi:10.3762/bjnano.15.59

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  • device. The lifetime of devices is reduced because of leakage currents [1]. Leakage increases when thin SiO2 is used as gate dielectric material. The subthreshold swing (SS) is 60 mV/dec for the thermionic injection of electrons in field-effect transistors (FETs) [2]. In practical implementations, the SS
  • the source. The gate length is 8 nm, the gate oxide thickness is 2 nm, and the gate height is 53 nm. The component has a symmetric dual source, measuring 50 nm in height and 20 nm on each side. The drain is 48 nm in length and 5 nm in height. The gate work function is optimized to 3.8 eV. The highly
  • doped source (p++ type), channel (n+ type), and drain (n++ type) materials exhibit doping concentrations of 1 × 1020, 1 × 1017, and 1 × 1019 cm−3, respectively. The molybdenum live metal strip has a length of 2 nm and a height of 1 nm. The drain region is reduced by adding SiO2 to the middle of the
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Published 19 Jun 2024

Elastic modulus of β-Ga2O3 nanowires measured by resonance and three-point bending techniques

  • Annamarija Trausa,
  • Sven Oras,
  • Sergei Vlassov,
  • Mikk Antsov,
  • Tauno Tiirats,
  • Andreas Kyritsakis,
  • Boris Polyakov and
  • Edgars Butanovs

Beilstein J. Nanotechnol. 2024, 15, 704–712, doi:10.3762/bjnano.15.58

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  • ; Introduction Significant advancements in both material and device technologies related to monoclinic gallium oxide (β-Ga2O3) have been achieved in the current decade [1][2]. Recently, attention has been directed towards it due to its outstanding properties [3] such as ultrawide band gap (4.4–4.9 eV) and
  • (11−2) and (−112) planes were identified with 2.2 Å interlayer spacing, indicating [021] growth direction. The presence of NWs with various crystalline orientations suggests either the absence of one dominant preferential growth direction due to the low-symmetry monoclinic phase or other growth
  • mechanisms alongside the vapour–liquid–solid (VLS) method. Following an examination via SEM, it became evident that the NWs exhibit variations in their dimensions, highlighting a nonuniform geometry (Figure 2). The observed NWs and NB-like structures exhibited various cross-sections, including square-like
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Published 18 Jun 2024

Enhancing higher-order modal response in multifrequency atomic force microscopy with a coupled cantilever system

  • Wendong Sun,
  • Jianqiang Qian,
  • Yingzi Li,
  • Yanan Chen,
  • Zhipeng Dou,
  • Rui Lin,
  • Peng Cheng,
  • Xiaodong Gao,
  • Quan Yuan and
  • Yifan Hu

Beilstein J. Nanotechnol. 2024, 15, 694–703, doi:10.3762/bjnano.15.57

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  • ; Introduction Multifrequency atomic force microscopy (AFM) has become an important tool for nanoscale imaging and characterization [1][2]. This technique involves the excitation and detection of multiple frequencies to improve data acquisition speed, sensitivity, and resolution, as well as to enable material
  • , respectively. dn and bn satisfy the following expressions: Assuming l = L and using the macroscale cantilever parameters studied in this paper, that is, E = 166 GPa, m = 0.04 kg/m, L = 2.75 cm, w = 1 cm, d = 1.8 mm, and c = 0.01 kg/ms, the Bode plot can be obtained as shown in Figure 2. The result shows that
  • positions were simulated and analyzed. The first two orders of modal frequencies for different left side lengths l obtained through modal analysis are shown in Table 2. The total length of the cantilever is kept constant during the simulation, that is, the right side length L keeps changing with the left
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Published 17 Jun 2024

Gold nanomakura: nanoarchitectonics and their photothermal response in association with carrageenan hydrogels

  • Nabojit Das,
  • Vikas,
  • Akash Kumar,
  • Sanjeev Soni and
  • Raja Gopal Rayavarapu

Beilstein J. Nanotechnol. 2024, 15, 678–693, doi:10.3762/bjnano.15.56

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  • temperature [2]. The mean free path of an electron is influenced by shape/size of the metal nanoparticles which ultimately governs their physical, chemical, optical, magnetic, catalytic, and electronic properties [3]. All plasmonic metals exhibit optical phenomena over a range of electromagnetic radiation
  • prepared as shown in step 1 and were used subsequently in step 2 for the preparation of AuNMs. Figure 1b shows the absorption spectra of Au seed capped with different surfactants. Absorption spectra of CTAB-AuNM, MTAB-AuNM, and DTAB-AuNM in the range of visible to NIR are shown in Figure 1c. The absorption
  • that might occur as the gels solidify. The absorption spectra were measured at 2 min intervals for a total duration of 4 min when the hydrogels completely solidified. We observed no major difference in the absorption spectrum in all three types of AuNMs (i.e., CTAB-AuNM, MTAB-AuNM, and DTAB-AuNM
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Published 07 Jun 2024

Functional fibrillar interfaces: Biological hair as inspiration across scales

  • Guillermo J. Amador,
  • Brett Klaassen van Oorschot,
  • Caiying Liao,
  • Jianing Wu and
  • Da Wei

Beilstein J. Nanotechnol. 2024, 15, 664–677, doi:10.3762/bjnano.15.55

Graphical Abstract
  • form of collagen [1] and microtubules and microfilaments [2], and externally in the form of silk [3] and hair [4][5]. Among these prevalent, quasi-one-dimensional structures, here we loosely define biological “hairs” as high-aspect-ratio structures that are external and passive. This definition is
  • that larger organisms dedicate more energy and resources to growing and maintaining hair. This finding motivates the following questions: (1) What are the purposes of hair? (2) How do these purposes vary with organism size? For countless animal species, hairs are strategically placed throughout the
  • . Bacteria, such as Pseudomonas aeruginosa (2 µm in size), use thin filaments (up to several micrometers long), known as pilus (type IV), to attach to surfaces and, in effect, “tow” themselves around on the surface [64]. Bacteriophages (≈100 nm in size) rely on their tail filaments to attach to their hosts
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Published 06 Jun 2024
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