Wet-spinning of magneto-responsive helical chitosan microfibers

• Dorothea Brüggemann,
• Johanna Michel,
• Naiana Suter,
• Matheus Grande de Aguiar and
• Michael Maas

Beilstein J. Nanotechnol. 2020, 11, 991–999, doi:10.3762/bjnano.11.83

• immunogenicity [17] and, therefore, has become highly used in tissue regeneration [18][19]. Chitosan fibers are particularly well-suited for tissue engineering due to their highly porous scaffold architecture [20]. Using electrospinning, chitosan fibers can be produced with a diameter ranging from several tens

• of nanometers to a few micrometers [21]. Blends of chitosan with alginate, silk, fibroin, cellulose or collagen can also be processed into composite fibers by electrospinning [22]. Wet-spinning is another well-established method of fabricating chitosan fibers with a diameter in the micrometer range

• ]. Additionally, by using either wet-spinning or electrospinning techniques, nanoparticles can be suspended into the viscous spinning solution and embedded into the fiber matrix. For example, silver nanoparticles have been incorporated into electrospun chitosan fibers enabling antibacterial activity in wound

A novel dry-blending method to reduce the coefficient of thermal expansion of polymer templates for OTFT electrodes

• Xiangdong Ye,
• Bo Tian,
• Yuxuan Guo,
• Fan Fan and
• Anjiang Cai

Beilstein J. Nanotechnol. 2020, 11, 671–677, doi:10.3762/bjnano.11.53

• a sol–gel precursor by adding tetraethyl orthosilicate (TEOS) to polyvinyl pyrrolidone (PVP), and then synthesized a silica/PVP nanofiber composite by electrospinning. The content of silica nanofibers in the composite is 9.1 wt %, and the CTE was decreased by ca. 40%. Jeyranpour et al. [13] studied

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

• environmental monitoring, industry, aviation, and transportation. In this paper, heterostructured CuO–ZnO-loaded CNF membranes (CNFMs) were prepared successfully by a combination of electrospinning, heat treatment, and hydrothermal synthesis. The influence of the synthesis parameters on morphology, structure

• three times, and the degradation rate remained above 90%. Keywords: electrospinning; composite nanofibers; heterostructured CuO–ZnO; hydrothermal synthesis; photocatalysis; semiconductor oxide; Introduction Water remediation is one of the main scientific research subjects regarding environmental

• , electrical, mechanical and chemical properties, which might result in applications in photocatalysis [26]. Electrospinning is a simple and convenient method for preparing composite nanofibers (CNFs) [27][28][29][30][31]. CNFs have been widely applied as carrier material due to their outstanding

Four self-made free surface electrospinning devices for high-throughput preparation of high-quality nanofibers

• Yue Fang and
• Lan Xu

Beilstein J. Nanotechnol. 2019, 10, 2261–2274, doi:10.3762/bjnano.10.218

• Yue Fang Lan Xu National Engineering Laboratory for Modern Silk, College of Textile and Engineering, Soochow University, 199 Ren-ai Road, Suzhou 215123, China 10.3762/bjnano.10.218 Abstract Four different self-made free surface electrospinning (FSE) techniques, namely, modified bubble

• -electrospinning (MBE), modified free surface electrospinning (MFSE), oblique section free surface electrospinning (OSFSE) and spherical section free surface electrospinning (SSFSE), designed for high-throughput preparation of high-quality nanofibers, are presented in this paper. The mechanisms of fiber

• device performs best, providing the highest quality and yield of nanofibers. The SSFE device could yield 20.03 g/h of nanofibers at an applied voltage of 40 kV. Keywords: electric field; free surface electrospinning; high-throughput preparation; Maxwell 3D; mechanism; nanofibers; Introduction Due to

A novel all-fiber-based LiFePO₄/Li₄Ti₅O₁₂ battery with self-standing nanofiber membrane electrodes

• Li-li Chen,
• Hua Yang,
• Mao-xiang Jing,
• Chong Han,
• Fei Chen,
• Xin-yu Hu,
• Wei-yong Yuan,
• Shan-shan Yao and
• Xiang-qian Shen

Beilstein J. Nanotechnol. 2019, 10, 2229–2237, doi:10.3762/bjnano.10.215

• , Chongqing, 400715, China 10.3762/bjnano.10.215 Abstract Electrodes with high conductivity and flexibility are crucial to the development of flexible lithium-ion batteries. In this study, three-dimensional (3D) LiFePO4 and Li4Ti5O12 fiber membrane materials were prepared through electrospinning and directly

• network; electrospinning; flexible electrodes; lithium ion battery; nanofiber; self-standing electrodes; Introduction With the rapid development of renewable energy technologies, electric vehicles and electronic devices, energy storage technology has become a focus of global research [1][2][3][4][5][6][7

• increased, the utilization ratio of the active material is improved, and the structural stability of the material is enhanced [18][27][28]. Therefore, it is highly desirable to fabricate all-fiber-based batteries to achieve high performance for practical applications [34][35]. Electrospinning is an

Review of advanced sensor devices employing nanoarchitectonics concepts

• Katsuhiko Ariga,
• Tatsuyuki Makita,
• Masato Ito,
• Taizo Mori,
• Shun Watanabe and
• Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

• , vinylidenefluoride-tetrafluoroethylene-hexafluoropropylene, and an ionic liquid, 1-butyl-3-methylimidazolium bis(trifluoromethanesulphonyl)imide, through an electrospinning process. The prepared sensor can only sense normal pressure without significant disturbance up to a bending radius of 80 µm. This sensor system

Optimization and performance of nitrogen-doped carbon dots as a color conversion layer for white-LED applications

• Tugrul Guner,
• Hurriyet Yuce,
• Didem Tascioglu,
• Eren Simsek,
• Umut Savaci,
• Aziz Genc,
• Servet Turan and
• Mustafa M. Demir

Beilstein J. Nanotechnol. 2019, 10, 2004–2013, doi:10.3762/bjnano.10.197

• to inorganic phosphors that are commonly employed in white-LED configurations. Keywords: color conversion layer; electrospinning; nitrogen-doped carbon dots; PVP; solid-state lighting; white LED; white-light generation; Introduction Light-emitting carbon dots (CDots) are a new class of

• of the red emission component on the white-light properties. Additionally, composite fibers were prepared by electrospinning of the water-based PVP/N-CDots. By adjusting the amount of fibers in the color conversion layers, the quality of the generated white light was improved, and a high CRI together

• first, 3.0 g of PVP was mixed with 2.5 mL of ethanol and 2.5 mL of pure water in a glass vial. Then, 2.0 mL of the PVP solution was mixed with 15.0 µL of the N-CDot dispersion for electrospinning. The PVP/N-CDot fibers were fabricated by employing a potential difference of 15 kV and a flow rate of 1 mL

Nanostructured and oriented metal–organic framework films enabling extreme surface wetting properties

• Andre Mähringer,
• Julian M. Rotter and
• Dana D. Medina

Beilstein J. Nanotechnol. 2019, 10, 1994–2003, doi:10.3762/bjnano.10.196

• example, sol–gel synthesis, electrochemical deposition, anodization, electrochemical polymerization, electrospinning, plasma treatment, chemical or hydrothermal methods, vapor deposition, layer-by-layer assembly or laser ablation [19][27][28][29][30][31][32][33][34][35][36][37][38][39]. However, the

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

• Carol López de Dicastillo,
• Cristian Patiño,
• María José Galotto,
• Yesseny Vásquez-Martínez,
• Claudia Torrent,
• Daniela Alburquenque,
• Alejandro Pereira and
• Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

• this work, novel, hollow, calcined titanium dioxide nanospheres (CSTiO2) were successfully synthesized for the first time through the combination of electrospinning and atomic layer deposition techniques. Poly(vinylpyrrolidone) (PVP) electrosprayed spherical particles were double-coated with alumina

• ; atomic layer deposition; electrospinning; hollow nanospheres; titanium dioxide; Introduction Microbial contamination and the increase of multidrug bacterial resistance have become two major current concerns for food safety and human health due to the number of food-borne diseases and nosocomial

• [10][15]. In this work, the combination of electrospinning and atomic layer deposition (ALD) technologies are presented as an innovative strategy to develop titanium dioxide hollow nanospheres with controlled and homogeneous dimensions. Electrospinning is a technique able to produce different

High-temperature resistive gas sensors based on ZnO/SiC nanocomposites

• Vadim B. Platonov,
• Marina N. Rumyantseva,
• Alexander S. Frolov,
• Alexey D. Yapryntsev and
• Alexander M. Gaskov

Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151

• dispersed silicon carbide (SiC). In this work, ZnO and SiC nanofibers were synthesized by electrospinning of polymer solutions followed by heat treatment, which is necessary for polymer removal and crystallization of semiconductor materials. ZnO/SiC nanocomposites (15–45 mol % SiC) were obtained by mixing

• an n–n heterojunction at the ZnO/SiC interface. Keywords: electrospinning; high temperature gas sensor; n–n heterojunction; ZnO/SiC nanocomposite; Introduction The risk of air pollution is growing due to the development of new technologies in the chemical, metallurgical and food industries, the use

• been practically studied. A few works of the MO/SiC composite material based on highly dispersed silicon carbide [8][15] showed the stability of the material structure at 600 °C and its high response to carbon monoxide. Electrospinning is inexpensive tool widely used today for preparation porous

Tailoring the magnetic properties of cobalt ferrite nanoparticles using the polyol process

• Malek Bibani,
• Romain Breitwieser,
• Alex Aubert,
• Vincent Loyau,
• Silvana Mercone,
• Souad Ammar and
• Fayna Mammeri

Beilstein J. Nanotechnol. 2019, 10, 1166–1176, doi:10.3762/bjnano.10.116

• fibers, made by electrospinning [9]. Focusing on this latter class of materials, the polymer exhibiting the most interesting ferro-and piezoelectric properties is a semi-crystalline fluoropolymer: poly(vinylidene fluoride) or PVDF. Mixing PVDF with magnetic nanoparticles leads to a higher polymer

An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO₂ hybrid composite

• Mamta Sham Lal,
• Thirugnanam Lavanya and
• Sundara Ramaprabhu

Beilstein J. Nanotechnol. 2019, 10, 781–793, doi:10.3762/bjnano.10.78

• carbon nanofiber/TiO2 (Cu/CuO/PCNF/TiO2) composite uniformly covered with TiO2 nanoparticles was synthesized by electrospinning and a simple hydrothermal technique. The synthesized composite exhibits a unique morphology and excellent supercapacitive performance, including both electric double layer and

• have been envisaged as a prospective electrode material due to its good mechanical strength, high surface area, relatively high conductivity [11][12]. Hence, carbon nanofibers produced by electrospinning, which is a cost-effective, simple and industry-viable technology, offer high production rate, high

• behavior. Herein, we report a novel approach for the fabrication of a Cu/CuO/porous carbon nanofiber (PCNF)/TiO2 (Cu/CuO/PCNF/TiO2) composite that is uniformly covered by TiO2 nanoparticles and is synthesized using the electrospinning method together with a hydrothermal technique, followed by air

Graphene-enhanced metal oxide gas sensors at room temperature: a review

• Dongjin Sun,
• Yifan Luo,
• Marc Debliquy and
• Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

• the single components. The mechanisms through which graphene enhances the sensing performance of MOS sensors will be interpreted in the following sections. Wang et al. [35] reported that a formaldehyde (HCHO) sensor based on SnO2–GO composites, fabricated via electrospinning, exhibited a three times

• electrospinning. The Co3O4–rGO room-temperature sensor showed excellent sensitivity to low concentrations of NH3, an ultrafast response time of only 4 s with exceptional selectivity to NH3. The authors claimed that the introduction of rGO exhibiting a strong attraction to NH3 played a crucial role in improving

Nanocellulose: Recent advances and its prospects in environmental remediation

• Katrina Pui Yee Shak,
• Yean Ling Pang and
• Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

• cellulose pulp is required to produce CNF/CNC. In general, most CNCs and CNFs are produced through breaking down the cellulose fibres into nanosize fragments (top-down process), except for BC and electrospun cellulose nanofiber (ECNF) which utilize bacteria and an electrospinning technique (bottom-up

• counter collision, ball milling, blending, cryocrushing, electrospinning, extrusion, grinding, homogenization, refining, steam explosion, ultrasonication, or a combination thereof. Chemical reaction Effective and energy-efficient nanocellulose preparation techniques are being pursued to sustain and meet

Effect of electrospinning process variables on the size of polymer fibers and bead-on-string structures established with a 2³ factorial design

• Paulina Korycka,
• Adam Mirek,
• Katarzyna Kramek-Romanowska,
• Marcin Grzeczkowicz and
• Dorota Lewińska

Beilstein J. Nanotechnol. 2018, 9, 2466–2478, doi:10.3762/bjnano.9.231

• diameter of uniform and heterogeneous fibers (with and without bead-on-string structures) and the size of beads obtained during the electrospinning process. A 23 factorial design was performed to determine the influence of the following factors: electrical voltage, flow rate and dynamic viscosity of the

• viscosity, while the voltage had the greatest influence on the bead-free fiber diameter. The interactions between the studied factors were also analyzed. It was found that the presented method can be used for the design of an optimal and cost-effective electrospinning process, allowing the desired product

• to be obtained with expected features. Keywords: bead-on-string structure; electrospinning; factorial design; polymer fiber; Introduction Since the beginning of the 21st century, the interest in electrospinning processes has been growing constantly. The reason for this is the wide range of

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

• Muhammad Imran,
• Nunzio Motta and
• Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

• in everyday life. Herein, we review recent developments of gas sensors based on electrospun 1D nanostructures in different sensing platforms, including optical, conductometric and acoustic resonators. After explaining the principle of electrospinning, we classify sensors based on the type of

• benefits and limitations for every approach. Keywords: 1D nanostructures; conductometric devices; electrospinning; gas sensors; optical sensors; resonators; Review 1 Introduction The monitoring and control of air pollutants, toxic gases and explosives has become increasingly important for human wellness

• produced by many different approaches. For example, by use of a molten-salt method, wet (or liquid) chemistry, nanocarving, self-catalyst growth, template-assisted (or sacrificial template) synthesis, chemical vapour deposition, thermal evaporation, spray pyrolysis or electrospinning [34][35][36]. Among

Biomimetic and biodegradable cellulose acetate scaffolds loaded with dexamethasone for bone implants

• Aikaterini-Rafailia Tsiapla,
• Varvara Karagkiozaki,
• Veroniki Bakola,
• Foteini Pappa,
• Panagiota Gkertsiou,
• Eleni Pavlidou and
• Stergios Logothetidis

Beilstein J. Nanotechnol. 2018, 9, 1986–1994, doi:10.3762/bjnano.9.189

• work, a drug-delivery nanoplatform system consisting of polymeric celluloce acetate (CA) scaffolds loaded with dexamethasone was fabricated through electrospinning. Atomic force microscopy (AFM) and scanning electron microscopy (SEM) indicated the successful fabrication of these structures

• inflammations along with a simultaneous controlled release of the drug. Keywords: drug delivery; electrospinning; nanocoatings; orthopedics; tissue engineering; Introduction The application of nanotechnology in medicine, known as nanomedicine, aims to overcome problems associated with diseases at the

• are placed as coatings in medical devices in order to enhance the biocompatibility [2][3][4]. One technique to produce such coatings is electrospinning, which yields long micro- and nanofibers [5]. More specifically, physical and synthetic polymeric fibers of 30–20000 nm in length are produced by

Influence of the preparation method on the photocatalytic activity of Nd-modified TiO₂

• Patrycja Parnicka,
• Paweł Mazierski,
• Tomasz Grzyb,
• Wojciech Lisowski,
• Ewa Kowalska,
• Bunsho Ohtani,
• Adriana Zaleska-Medynska and
• Joanna Nadolna

Beilstein J. Nanotechnol. 2018, 9, 447–459, doi:10.3762/bjnano.9.43

• materials for various applications. According to the literature, RE-modified TiO2 could be prepared through a wide spectrum of methods, such as sol–gel [18][25], hydrothermal [23][26][27], solvothermal [28], electrospinning [29], co-precipitation [30] and electrochemical [8] methods. In our previous papers

Facile synthesis of ZnFe₂O₄ photocatalysts for decolourization of organic dyes under solar irradiation

• Arjun Behera,
• Debasmita Kandi,
• Sanjit Manohar Majhi,
• Satyabadi Martha and
• Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 436–446, doi:10.3762/bjnano.9.42

• ZnFe2O4 by different physical (SSR and μW) and chemical (PC and SPC) methods with the formation of different structures [22]. Ponhan et al. prepared ZnFe2O4 nanofibres by electrospinning at room temperature. The resultant ZnFe2O4/PVP composite nano-fibres were calcined at 500, 600 and 700 °C for 2 h in a

Engineering of oriented carbon nanotubes in composite materials

• Razieh Beigmoradi,
• Abdolreza Samimi and
• Davod Mohebbi-Kalhori

Beilstein J. Nanotechnol. 2018, 9, 415–435, doi:10.3762/bjnano.9.41

• and production ability of the fibers in semi-industrial quantities [44]. The two methods commonly used to make CNT/nanofiber are described below. Electrospinning: Electrospinning (ES) can be used to produce fibers from a viscous solution of polymer/CNTs, it is also employed for aligning CNTs in the

• arranged CNTs (b). Adapted with permission from [42], copyright 2009 American Chemical Society. Schematic structure of an aligned CNT in a polymer nanofiber. TEM micrograph, adapted with permission from [48], copyright 2003 American Chemical Society. An electrospinning workflow illustrates a standard

• electrospinning setup, including power supply, syringe pump and collector plate and other collectors developed to collect oriented fibers. (I) [50][53][54][55], (II) [56], (III) [57], (IV) [58], (V) [59], (VI) [60], (VII) [61][62], (VIII) [63], (IX) [64], (X) [65]. SEM images: (I) Reproduced with permission from

Synthesis and characterization of electrospun molybdenum dioxide–carbon nanofibers as sulfur matrix additives for rechargeable lithium–sulfur battery applications

• Ruiyuan Zhuang,
• Shanshan Yao,
• Maoxiang Jing,
• Xiangqian Shen,
• Jun Xiang,
• Tianbao Li,
• Kesong Xiao and
• Shibiao Qin

Beilstein J. Nanotechnol. 2018, 9, 262–270, doi:10.3762/bjnano.9.28

• using an electrospinning technique followed by calcination, using sol–gel precursors and polyacrylonitrile (PAN) as a processing aid. The resulting samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, Brunauer–Emmet–Teller (BET

• coefficient, low interfacial resistance and much better electrochemical performance than pristine sulfur cathodes. Keywords: electrochemical performance; electrospinning; lithium–sulfur batteries; MoO2–CNFs; sulfur matrix; Introduction Lithium–sulfur (Li–S) batteries are considered to be the most promising

• precursors and self-templates, which were used as anode materials in lithium ion batteries [22][23]. However, since electrospinning is a simple and versatile method for producing fibers from a variety of materials on a large scale, it has attracted much attention in both research and commerce [24]. The

Electrical properties of a liquid crystal dispersed in an electrospun cellulose acetate network

• Doina Manaila Maximean,
• Octavian Danila,
• Pedro L. Almeida and
• Constantin Paul Ganea

Beilstein J. Nanotechnol. 2018, 9, 155–163, doi:10.3762/bjnano.9.18

• nano- and micro-fiber cellulose mats used to prepare the electro-optical cells were produced by electrospinning [21][22][28] from an isotropic solution (15%) of cellulose acetate (CA, Aldrich, MW = 60.000 g·mol−1, 40% acetyl groups) in a mixture of dimethylacetamide/acetone (1:2). The solution was

• , Cp. Optical transmission of the sample CA/E7 as a function of the applied ac electric field. Schematic representation of electrospinning cellulose fibers from solution. Experimental set-up for the optical transmission measurement. Extracted values of the DS characteristic constants for the CA/E7

Oxidative stabilization of polyacrylonitrile nanofibers and carbon nanofibers containing graphene oxide (GO): a spectroscopic and electrochemical study

• İlknur Gergin,
• Ezgi Ismar and
• A. Sezai Sarac

Beilstein J. Nanotechnol. 2017, 8, 1616–1628, doi:10.3762/bjnano.8.161

• Istanbul, Turkey 10.3762/bjnano.8.161 Abstract In this study, a precursor for carbon nanofibers (CNF) was fabricated via electrospinning and carbonized through a thermal process. Before carbonization, oxidative stabilization should be applied, and the oxidation mechanism also plays an important role

• properties of the few-layered GO are: GO consists of a few layers (1–10 layers) and the average thickness of the layer is smaller than 4 nm. The specific surface area of GO is larger than 550 m2/g. GO consists of 68.44 atom % C, 30.92 atom % O and 0.63 atom % S. For electrospinning, PAN dissolved in DMF and

• electrospinning. Before the electrospinning process, GO was also added to the PAN/DMF solution to obtain PAN/GO nanofibers. After electrospinning of the PAN/GO nanofibers, the PAN/GO samples underwent the same heat treatment (oxidation and carbonization) as the PAN nanofibers. Rotating and fixed collectors were

Fabrication of hierarchically porous TiO₂ nanofibers by microemulsion electrospinning and their application as anode material for lithium-ion batteries

• Jin Zhang,
• Yibing Cai,
• Xuebin Hou,
• Xiaofei Song,
• Pengfei Lv,
• Huimin Zhou and
• Qufu Wei

Beilstein J. Nanotechnol. 2017, 8, 1297–1306, doi:10.3762/bjnano.8.131

• -nozzle microemulsion electrospinning (ME-ES) method followed by calcining. The experimental results indicated that TiO2 nanofibers with the higher TBT/paraffin oil ratio demonstrated more axially aligned channels and a larger specific surface area. Furthermore, they presented superior lithium-ion storage

• batteries; microemulsion electrospinning (ME-ES); multichannel; Introduction The increasing demand for energy has heightened the need for the development of renewable resources because fossil fuels, which are currently the most common energy resources, are a finite resource [1][2][3][4]. Battery industry

• and nanorods are considered to be promising electrode materials for excellent lithium-ion battery performance. This is partly because of their small size enabling fast electron transport and decreasing retardation at the interface [21][22]. Electrospinning, a simple and versatile method, has been

Hierarchically structured nanoporous carbon tubes for high pressure carbon dioxide adsorption

• Julia Patzsch,
• Deepu J. Babu and
• Jörg J. Schneider

Beilstein J. Nanotechnol. 2017, 8, 1135–1144, doi:10.3762/bjnano.8.115

• created by nanocasting [29]. All of these approaches have allowed for the synthesis of ordered hierarchical macro–mesoporous materials [24]. Electrospinning is a versatile technique for the synthesis of different one-dimensional forms such as fibers, tubes or wires for various applications such as gas

• fibres (1) In a similar manner as described in [38], electrospinning was performed in a homebuilt apparatus. Polystyrene (PS) fibres were electrospun from a 16 wt % PS THF/DMF 3:2 solution. After aging the spinning solution overnight, it was loaded into a glass syringe equipped with a stainless-steel

• expressed in g/mol. Results and Discussion In Figure 1 the overall synthesis strategy for the preparation of carbon tubes (4) and SiC tubes (5) is shown schematically. PS fibres (1) prepared by the electrospinning technique were subjected to a plasma treatment for effective tethering of the silica