Experimental investigation of usage of POE lubricants with Al₂O₃, graphene or CNT nanoparticles in a refrigeration compressor

• Kayhan Dağıdır and
• Kemal Bilen

Beilstein J. Nanotechnol. 2023, 14, 1041–1058, doi:10.3762/bjnano.14.86

• becoming more and more common due to their unique thermal properties [14]. Akkaya et al. [15] experimentally explored the lubrication properties of sepiolite (SP) and its carbon composites carbon black (CB), MWCNT, and reduced graphene oxide (rGO) in a refrigeration compressor. Consequently, the addition

Nanoarchitectonics of photothermal materials to enhance the sensitivity of lateral flow assays

• Elangovan Sarathkumar,
• Rajasekharan S. Anjana and
• Ramapurath S. Jayasree

Beilstein J. Nanotechnol. 2023, 14, 988–1003, doi:10.3762/bjnano.14.82

• reduced graphene oxide (rGO), SERS imaging can be done along with photothermal therapy [84]. Recently, our group developed a multifunctional rGO–Au nanoscale architecture loaded with Raman dye and anticancer drugs for fluorescence/SERS imaging-guided breast cancer therapy. Under activation of a laser at

• diagnostic tools. Based on the photothermal principle, very recently, Shirshahi et al. developed LFA strips for the detection of E. coli O157:H7 strains of bacteria. They used reduced graphene oxide as both tracer and photothermal signal amplification material. After the deposition of rGO on the test line

Evaluation of electrosynthesized reduced graphene oxide–Ni/Fe/Co-based (oxy)hydroxide catalysts towards the oxygen evolution reaction

• Karolina Cysewska,
• Marcin Łapiński,
• Marcin Zając,
• Jakub Karczewski,
• Piotr Jasiński and
• Sebastian Molin

Beilstein J. Nanotechnol. 2023, 14, 420–433, doi:10.3762/bjnano.14.34

• performance was also obtained for electrodeposited NiFe LDH combined with GO on nickel foam (GO-NiFe-LDH) [12] and NiFe LDH combined with reduced graphene oxide (rGO) on nickel foam (NiFe-LDH/RGO) [21]. The OER η was determined to be 119 mV and 150 mV determined at 10 mA·cm−2 in 1 M KOH for GO-NiFe-LDH and

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

• incubation with artificial blood plasma, hydroxyapatite bone minerals were formed. The cell survival and cell adhesion of composite-containing MG-63 cells exhibit improved biocompatibility [62]. Also, reduced graphene oxide combined with chitosan was fabricated into a hydrogel by using a tannic acid cross

• wettability of the chitosan/reduced graphene oxide composites with specific acetic acid and lactic acid shows water contact angles of (75.40° ± 4.32°) and (36.71° ± 4.53°) [60]. The anticancer agent cisplatin was loaded into graphene oxide/hydroxyapatite/chitosan composites to enable proliferation of

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

• ; microwave synthesis; oxygen electroreduction; reduced graphene oxide; silver NPs; Introduction Fuel cells and rechargeable metal–air batteries have become an integral part of the renewable energy system because of their superior efficiency, high power density, and reliability. Also, they are

• ). The superior ECSA values of our electrocatalysts are comparable to that of AgCo/electrochemically reduced graphene oxide and AgPdPt nanotubes (Table S3, Supporting Information File 1). Even though ACC-3 displayed a slightly higher ESCA and mass activity as compared to ACC-2, the higher onset potential

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

• graphene oxide networks, (c) carbon nanotubes, and (d) boron nitride networks. Figure 4 was reprinted with permission from [111], Copyright 2021 American Chemical Society. This content is not subject to CC BY 4.0. (a) Schematic illustration of synthesis of SOM-ZIF-8. SOM stands for single-crystal ordered

• ., published by Elsevier, distributed under the terms of the Creative Commons Attribution 4.0 International License, https://creativecommons.org/licenses/by/4.0). Schematic illustrations and SEM images of Prussian blue single crystals encapsulating various kinds of networks: (a) TiO2 networks, (b) reduced

A nonenzymatic reduced graphene oxide-based nanosensor for parathion

• Sarani Sen,
• Anurag Roy,
• Ambarish Sanyal and
• Parukuttyamma Sujatha Devi

Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65

• the fabrication of a robust, nonenzymatic electrochemical-sensing electrode modified with electrochemically reduced graphene oxide (ERGO) to detect PT residues in environmental samples (e.g., soil, water) as well as in vegetables and cereals. The ERGO sensor shows a significantly affected

• at 3000 rpm for 15 min. The product (GO) was collected and dried at room temperature for further studies. Fabrication of electrochemically reduced graphene oxide modified electrodes Before surface modification of GO, a bare glassy carbon electrode (GCE, φ = 3 mm) was polished in 1.0, 0.3, and 0.05

• . Results and Discussion Optimization and characterization of electrochemically reduced graphene oxide formation Figure 1A shows the UV spectra of GO and its change following the electrochemical reduction of GO. It is observed that the absorption peak of GO at 223 nm due to the π–π* transition of the C=C

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

• fractal dimension of 1.79. Tungsten oxide-based fractals A very recent study on the sensing of NO2, acetone, and carbon monoxide was reported by Simon and co-workers. They used Ni nanoparticles to decorate a reduced graphene oxide/WO3 nanocomposite [78]. The WO3 sample annealed at 600 °C shows the

• hydrothermal method to synthesize reduced graphene oxide and pine dendritic BiVO4 composite with an average length of 1–1.5 μm and about 0.6 μm width [82]. In the hybrid composite rGO nanosheets were draped with a pine dendritic morphology. Figure 20 shows the SEM images of GO (Figure 20a), rGO (Figure 20b

Progress and innovation of nanostructured sulfur cathodes and metal-free anodes for room-temperature Na–S batteries

• Marina Tabuyo-Martínez,
• Bernd Wicklein and
• Pilar Aranda

Beilstein J. Nanotechnol. 2021, 12, 995–1020, doi:10.3762/bjnano.12.75

• to be highly underinvestigated despite the advantages an aqueous solution-based synthesis route can offer. Instead, commercial S NPs are increasingly employed in cathodes, for instance, by Chen et al. [58], who wrapped reduced graphene oxide sheets around such NPs (Figure 7B). In this case, 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

• signals, the researchers proposed a single-electrode TENG (SE-TENG) as an intelligent neuromorphic sensor using reduced graphene oxide [90]. Reduced graphene oxide can act as electronic trap, and the output information of the sensor contains real-time stimulation information and information about previous

Nickel nanoparticle-decorated reduced graphene oxide/WO₃ nanocomposite – a promising candidate for gas sensing

• Ilka Simon,
• Alexandr Savitsky,
• Rolf Mülhaupt,
• Vladimir Pankov and
• Christoph Janiak

Beilstein J. Nanotechnol. 2021, 12, 343–353, doi:10.3762/bjnano.12.28

• /WO3 composite and CO gas, a response time (Tres) of 7 min and a recovery time (Trec) of 2 min was determined. Keywords: gas sensing; magnetic measurements; nickel nanoparticles; reduced graphene oxide; tungsten oxide; Introduction Toxic gases as well as volatile organic compounds (VOC) are known air

• achieved [47]. Thermally reduced graphene oxide was tested before with different metals in ionic liquids [48][49]. The decoration of nanoparticles on rGO can be achieved in situ or by mixing previously prepared solutions [50]. Here, we chose the ionic liquid [BMIm][NTf2] for an in situ microwave

• graphene and metal oxide. In the case of reduced graphene oxide (semiconductor), various reasons are considered, such as the appearance of p–n junctions that shift the Fermi level of the oxide. There is evidence of effective charge transfer between graphene and nanospheres through chemical bonds. Emergence

Paper-based triboelectric nanogenerators and their applications: a review

• Jing Han,
• Nuo Xu,
• Yuchen Liang,
• Mei Ding,
• Junyi Zhai,
• Qijun Sun and
• Zhong Lin Wang

Beilstein J. Nanotechnol. 2021, 12, 151–171, doi:10.3762/bjnano.12.12

• ., metal nanowires, conducting polymers, carbon nanotube (CNT) inks, multiwall carbon nanotube (MWCNT) inks, and reduced graphene oxide) [69][70][71][72][73][74][75][76][77][78][79][80][81][82], can be easily absorbed or used as a coating layer on the surface of the paper due to its wettability and

• changing the concentration of the conductive precursors (e.g., AgNWs, carbon nanotubes, and reduced graphene oxide). A special nanoscale paper composed of nanocellulose, which is easy to be synthesized/chemically modified/doped, has attracted great attention in recent years. Generally, cellulose-based

ZnO and MXenes as electrode materials for supercapacitor devices

• Ameen Uddin Ammar,
• Ipek Deniz Yildirim,
• Feray Bakan and
• Emre Erdem

Beilstein J. Nanotechnol. 2021, 12, 49–57, doi:10.3762/bjnano.12.4

• applications that offer high power density, stability, and safety. A specific capacitance of 366 F·g−1 was achieved at 2 mVs-1 [18]. In addition, Li et al. designed an asymmetric pseudosupercapacitor of wavy-Ti3C2Tx/reduced graphene oxide (rGO)/CNT/polyaniline(PANI), in which the Ti3C2Tx MXene is used as

Cu₂O nanoparticles for the degradation of methyl parathion

• Juan Rizo,
• David Díaz,
• Benito Reyes-Trejo and
• M. Josefina Arellano-Jiménez

Beilstein J. Nanotechnol. 2020, 11, 1546–1555, doi:10.3762/bjnano.11.137

• form on its surface. Consequently, both 16 nm and 29 nm NPs have a similar active surface size and the degradation percentage of MP is similar between 16 nm Cu2O (87%) and 29 nm Cu2O (83%). In order to avoid oxidation of Cu2O NPs, reduced graphene oxide (rGO) can be used as a support [54]. Finally, XPS

Antimicrobial metal-based nanoparticles: a review on their synthesis, types and antimicrobial action

• Matías Guerrero Correa,
• Fernanda B. Martínez,
• Cristian Patiño Vidal,
• Camilo Streitt,
• Juan Escrig and
• Carol Lopez de Dicastillo

Beilstein J. Nanotechnol. 2020, 11, 1450–1469, doi:10.3762/bjnano.11.129

• et al. produced coated sheets of reduced graphene oxide (rGO) which formed a composite compound containing ZnO [24][25]. One method that facilitates the large-scale production of nanoparticles is the MCP technique. This method is based on a chemical exchange reaction that occurs due to the heat and

Triboelectric nanogenerator based on Teflon/vitamin B1 powder for self-powered humidity sensing

• Liangyi Zhang,
• Huan Li,
• Yiyuan Xie,
• Jing Guo and
• Zhiyuan Zhu

Beilstein J. Nanotechnol. 2020, 11, 1394–1401, doi:10.3762/bjnano.11.123

• -free humidity sensors by using biocompatible collagen nanofibrils [43]. More recently, Zhang et al. developed a TENG-driven self-powered flexible humidity sensor based on a tin disulfide nanoflower/reduced graphene oxide (SnS2/rGO) hybrid nanomaterial [44]. However, the large-scale application of TENGs

Ultrasensitive detection of cadmium ions using a microcantilever-based piezoresistive sensor for groundwater

• Dinesh Rotake,
• Anand Darji and
• Nitin Kale

Beilstein J. Nanotechnol. 2020, 11, 1242–1253, doi:10.3762/bjnano.11.108

• graphene oxide (RGO)-based sensor and a microfluidic platform fabricated by [25][26][27] can be used with some surface modification for HMIs, but it is mostly capable of detecting in the micromolar range. A polymer-based microcantilever using an encapsulated piezoresistor has been proposed by Kale et al

• only on absorption and fluorescence change and need dynamic acquisition [23]. A magnetic field powered pressure sensor proposed by Khan et al. [24] is capable of measuring pressure in the range of kilopascals but the suitability for the very low pressure caused by HMIs needs to be examined. A reduced

Photothermally active nanoparticles as a promising tool for eliminating bacteria and biofilms

• Mykola Borzenkov,
• Piersandro Pallavicini,
• Angelo Taglietti,
• Laura D’Alfonso,
• Maddalena Collini and
• Giuseppe Chirico

Beilstein J. Nanotechnol. 2020, 11, 1134–1146, doi:10.3762/bjnano.11.98

• nanohole arrays with reduced graphene oxide nanosheets in a unique and flexible polyimide film for laser-gated pathogen inactivation. For the in vivo experiments, the patch was irradiated for 5 min with an LED array (940 nm, 10 W) and the patch surface temperature increased to 52 °C. These tests indicated

• in 77% planktonic P. aeruginosa cell death. In addition, polyurethane nanocomposites containing the same hybrid nanomaterials were also able to eliminate all the surface-grafted P. aeruginosa cells under NIR light irradiation. Reduced graphene oxide, which is characterized by a broad absorption

• % eradication of airborne bacteria [90]. Magnetic reduced graphene oxide functionalized with glutaraldehyde was synthesized to capture and eradicate both Gram-positive (S. aureus) and Gram-negative (E. coli) strains under NIR light irradiation [91]. It was shown that a solution containing 80 ppm of the

Applications of superparamagnetic iron oxide nanoparticles in drug and therapeutic delivery, and biotechnological advancements

• Maria Suciu,
• Corina M. Ionescu,
• Alexandra Ciorita,
• Septimiu C. Tripon,
• Dragos Nica,
• Hani Al-Salami and
• Lucian Barbu-Tudoran

Beilstein J. Nanotechnol. 2020, 11, 1092–1109, doi:10.3762/bjnano.11.94

• PEG and adsorbed on reduced graphene oxide sheets, which enhanced the thermal effect of hyperthermia and reduced the viability of breast cancer cells to less than 25% by reaching 43 °C [152]. Also, Zuvin et al. used 4–5 nm SPIONs conjugated with poly(acrylic acid) and anti-HER2 antibody against breast

Microwave-induced electric discharges on metal particles for the synthesis of inorganic nanomaterials under solvent-free conditions

• Vijay Tripathi,
• Harit Kumar,
• Anubhav Agarwal and
• Leela S. Panchakarla

Beilstein J. Nanotechnol. 2020, 11, 1019–1025, doi:10.3762/bjnano.11.86

• nanoparticles of Cu and Ni and one-dimensional nanorods of CuS, ZnF2, and NiF2 protected with fluorinated amorphous carbon. We have also synthesized reduced graphene oxide and partially rolled graphene by this method. Keywords: electric discharges; microwave synthesis; nanomaterials; transmission electron

• readily without disturbing internal materials. We could also produce reduced graphene oxide and graphene partially rolled into nanoscrolls. We hope that this work encourages further research exploring the possibilities to synthesize other inorganic nanomaterials by microwave-induced electric discharge

• graphene oxide and graphene without using any solvents or additional surfactants. Results and Discussion Smooth surfaces on commercially available metal particles do not create arcs under microwave irradiation. Instead, they heat up or reflects the microwaves. Thus, activating metal surfaces by acid

Electrochemically derived functionalized graphene for bulk production of hydrogen peroxide

• Munaiah Yeddala,
• Pallavi Thakur,
• Anugraha A and
• Tharangattu N. Narayanan

Beilstein J. Nanotechnol. 2020, 11, 432–442, doi:10.3762/bjnano.11.34

• (Se) edge functionalized graphene (reduced graphene oxide (rGO)) was found to undergo a direct four-electron path ORR process in alkaline medium, where rGO undergoes a two-electron path peroxide route ORR [35]. In this process, Se acts as a single atom site catalyst. In a nutshell, depending on the

Simple synthesis of nanosheets of rGO and nitrogenated rGO

• Pallellappa Chithaiah,
• Madhan Mohan Raju,
• Giridhar U. Kulkarni and
• C. N. R. Rao

Beilstein J. Nanotechnol. 2020, 11, 68–75, doi:10.3762/bjnano.11.7

• , 560064, India 10.3762/bjnano.11.7 Abstract A green and facile approach has been developed for the large-scale synthesis of nanosheets of reduced graphene oxide (rGO) and nitrogenated reduced graphene oxide (N-rGO). This has been achieved by direct thermal decomposition of sucrose and glycine at 475 °C

• hydrogen treated (H-rGO) samples. Keywords: nanosheets; nitrogenated reduced graphene oxide (N-rGO); reduced graphene oxide (rGO); supercapacitors; thermal decomposition; Introduction Graphene, the one atom thick two-dimensional material of sp2-hybridized carbon atoms has attracted much attention after

• its discovery [1][2]. It is a fascinating material used in various applications owing to its excellent electrical, optical, mechanical and thermal properties [3][4][5]. It has a unique electronic structure with a linear dispersion of Dirac electrons. Graphene oxide (GO) and reduced graphene oxide (rGO

Advanced hybrid nanomaterials

• Andreas Taubert,
• Fabrice Leroux,
• Pierre Rabu and
• Verónica de Zea Bermudez

Beilstein J. Nanotechnol. 2019, 10, 2563–2567, doi:10.3762/bjnano.10.247

• ]. The mesostructures are highly pH-sensitive, adopting 2D-hexagonal, wormlike or lamellar organization depending on the extent of the electrostatic complexing bonds and on the condensation rate. More complex assemblies involving ternary compositions in “Ternary nanocomposites of reduced graphene oxide

Synthesis and acetone sensing properties of ZnFe₂O₄/rGO gas sensors

• Kaidi Wu,
• Yifan Luo,
• Ying Li and
• Chao Zhang

Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242

• of ZnFe2O4 and reduced graphene oxide (rGO) with different rGO content were prepared via a simple solvothermal method followed by a high-temperature annealing process in an inert atmosphere. The X-ray diffraction analysis confirmed that the introduction of rGO had no effect on the spinel structure of

• ; composites; gas sensor; reduced graphene oxide (rGO); ZnFe2O4 hollow spheres; Introduction As a synthetic raw material in industrial production, acetone is chemically active and extremely flammable. It is toxic if its concentration exceeds 173 ppm, and long-term exposure to acetone poses a serious threat to

• ][25][26][27][28]. An optimum ratio of the composition and the fine nanostructure will contribute to obtaining better gas-sensing properties. A gas sensor with 3 wt % reduced graphene oxide (rGO) incorporated into In2O3 showed a rapid response, an improved stability and a low limit of detection of NO2

Design and facile synthesis of defect-rich C-MoS₂/rGO nanosheets for enhanced lithium–sulfur battery performance

• Chengxiang Tian,
• Juwei Wu,
• Zheng Ma,
• Bo Li,
• Pengcheng Li,
• Xiaotao Zu and
• Xia Xiang

Beilstein J. Nanotechnol. 2019, 10, 2251–2260, doi:10.3762/bjnano.10.217

• composite with both large surface area and high porosity for the use as advanced electrode material in lithium–sulfur batteries. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing reduced graphene oxide (rGO) and amorphous carbon. The conductibility of the cathodes can be

• construction of other high-performance metal disulfide electrodes for electrochemical energy storage. Keywords: annealing; double modification; high-performance electrodes; lithium–sulfur battery; molybdenum disulfide (MoS2); reduced graphene oxide (rGO); Introduction Lithium–sulfur (Li–S) batteries have