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Search for "room temperature" in Full Text gives 1379 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Orally administered docetaxel-loaded chitosan-decorated cationic PLGA nanoparticles for intestinal tumors: formulation, comprehensive in vitro characterization, and release kinetics

  • Sedat Ünal,
  • Osman Doğan and
  • Yeşim Aktaş

Beilstein J. Nanotechnol. 2022, 13, 1393–1407, doi:10.3762/bjnano.13.115

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  • room temperature. 250 mg of mucin, 0.295 mg of diethylenetriamine pentaacetic acid (DTPA), 250 mg of sodium chloride, 110 mg of potassium chloride, 250 μL of sterile egg yolk emulsion, and 1 mL of RPMI were dissolved in 50 mL of ultrapure water while being magnetically stirred at room temperature to
  • . In order to evaluate the penetration of formulations, 500 μL of NP dispersion was added onto this artificial mucus model and left for incubation for 24 h at room temperature. The artificial mucus containing NPs was removed from each well after 24 h. To completely clean the mucus, the gelatin layer
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Published 23 Nov 2022

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

  • Nirmalendu S. Mishra and
  • Pichiah Saravanan

Beilstein J. Nanotechnol. 2022, 13, 1380–1392, doi:10.3762/bjnano.13.114

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  • was fixed at 80 wt %. The obtained mixture was placed in a boat-type alumina crucible and subjected to heat treatment in a tube furnace at 900 °C for 3 h with a heating ramp rate of 5 °C/min under nitrogen atmosphere. Finally, the obtained MBN was naturally cooled to room temperature, washed multiple
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Published 22 Nov 2022

Supramolecular assembly of pentamidine and polymeric cyclodextrin bimetallic core–shell nanoarchitectures

  • Alexandru-Milentie Hada,
  • Nina Burduja,
  • Marco Abbate,
  • Claudio Stagno,
  • Guy Caljon,
  • Louis Maes,
  • Nicola Micale,
  • Massimiliano Cordaro,
  • Angela Scala,
  • Antonino Mazzaglia and
  • Anna Piperno

Beilstein J. Nanotechnol. 2022, 13, 1361–1369, doi:10.3762/bjnano.13.112

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  • (nanoG) and 0.2 cm path length quartz cells (nanoGS and nanoGSP) at room temperature (≈25 °C). The zeta potential, average hydrodynamic diameter, and width of distribution (polydispersity index, PDI) measurements were carried out by a Zetasizer Nano ZS (Malvern Instrument, Malvern, U.K.) at 25 °C in
  • (PolyCD = 1.71 mg/mL, Au = 28.17 µg/mL). PolyCD Au NPs, referred to as nanoGS, were stabilized for 12 h at room temperature before subsequent use. The synthesized nanoG was used as a seed material for subsequent silver shell growth, as follows: 40.5 μL of 10−1 M ascorbic acid and 13.5 µL of 10−1 M AgNO3
  • were added three times at room temperature, every hour, to a solution of nanoG (6.75 mL) to obtain nanoGS determined by a light orange staining of the solution. After each addition of silver ions, the mixture was kept under magnetic stirring at room temperature (20–25 °C) for 1 h. The reduction of
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Published 18 Nov 2022

Straight roads into nowhere – obvious and not-so-obvious biological models for ferrophobic surfaces

  • Wilfried Konrad,
  • Christoph Neinhuis and
  • Anita Roth-Nebelsick

Beilstein J. Nanotechnol. 2022, 13, 1345–1360, doi:10.3762/bjnano.13.111

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  • in the transfer of a system consisting of biological tissues and water working at room temperature to an arrangement of a metallic device and hot liquid iron. Rather, (i) the structure of the original biological models is too complex for an economically realistic solution, (ii) the derived structures
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Published 17 Nov 2022

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

  • Vishal Dutta,
  • Ankush Chauhan,
  • Ritesh Verma,
  • C. Gopalkrishnan and
  • Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

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  • energies. Many persistent organic contaminants can be degraded at room temperature through the oxidizing power of VB holes in bismuth oxyhalides [26]. BiOCl, BOI, BiOBr, and composites made from them have been widely reported due to their excellent photocatalytic properties [27][28][29]. However, the
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Published 11 Nov 2022

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

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  • Earth’s crust and a well-known p-type and narrow-bandgap (≈0.35 eV at room temperature) semiconductor material. Tellurium is widely used in thermoelectric devices, piezoelectric devices, photoconductive devices, gas sensing, nonlinear optical devices, solar cells, photonic crystals, holographic recording
  • materials [29][31] and one-dimensional nanostructures [17][18][28][47]. However, VRH was not observed in our t-Te roll-like NWs, indicating low disorder in these nanostructures. Mobility values of more than 700 cm2/Vs have also been reported at room temperature for t-Te NWs [48]. However, in this case, the
  • -nanobelt back-gated FET devices on SiO2/Si substrates. These nanostructures exhibit p-type conductivity with superior room temperature field-effect hole mobility compared to bulk and nanostructures of Te previously synthesized by other methods. The analysis of the temperature dependence of the electrical
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Published 08 Nov 2022

Studies of probe tip materials by atomic force microscopy: a review

  • Ke Xu and
  • Yuzhe Liu

Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104

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  • bias-assisted electroreduced gold ions in mesoporous silica films on a conductive substrate. It works in the air with high relative humidity (RH) at room temperature and leads to the growth of fine wires attached to the tip with tens to hundreds of nanometers. Under room temperature conditions with
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Published 03 Nov 2022

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

  • Yinglin Ma,
  • Xiangyun Xiao and
  • Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

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Published 27 Oct 2022

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

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  • intended to deliver active ingredients that are sensitive to heat, as these systems can be prepared from water-based polymer solutions at room temperature. The polymer dissolves in the tissue after the administration and the incorporated drug is released in this way. The dissolution time required to
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Published 24 Oct 2022

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

Graphical Abstract
  • . Then, the sample was annealed at 550 °C for two hours and let to cool to room temperature. For preparation of the MgO@g-C3N4 heterojunction material, both MgO and urea were mixed, ground, and placed in a 100 mL crucible, followed by annealing at 550 °C for two hours (Figure 1). Then, the samples were
  • let to cool to room temperature naturally. Different mass ratios of MgO and g-C3N4 were prepared, that is, 1%, 3% and 5%, named as x-MgO@g-C3N4 (x = 1, 3, and 5%). Characterization A variety of analytical techniques have been employed to evaluate the morphology and the physical, chemical, and optical
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Published 18 Oct 2022

A cantilever-based, ultrahigh-vacuum, low-temperature scanning probe instrument for multidimensional scanning force microscopy

  • Hao Liu,
  • Zuned Ahmed,
  • Sasa Vranjkovic,
  • Manfred Parschau,
  • Andrada-Oana Mandru and
  • Hans J. Hug

Beilstein J. Nanotechnol. 2022, 13, 1120–1140, doi:10.3762/bjnano.13.95

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  • the connectors on the cryostat bottom plate and feedthroughs of the UHV system, low-heat-conductive phosphor bronze wires [41] are used. The wires run down along the LHe tank with several attachment points to further reduce the heat flow from the room-temperature UHV flange connectors to the cryostat
  • conditions, that is, in air and at room temperature, to a level that the piezo motor slider still reliably moves at a piezo motor voltage pulse amplitude of ±70 V. The screws are then fixed with a small droplet of Torr Seal glue. The slider then still moves after a UHV system bake-out and at low temperatures
  • cantilever, the deflection noise obtained with typical deflection sensors is negligible such that thermal noise is dominant. Recently, Feng et al. [29] have demonstrated that at room temperature a force derivative of 78 nN/m is detectable in a bandwidth of 1 Hz, which is of particular importance for the
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Published 11 Oct 2022

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

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  • structure for endogenous nitrogen-doping in a green synthesis of CD-based room-temperature phosphorescent (RTP) materials. The materials had lifetimes of up to 271.2 ms with a lower energy gap and 350 nm of excitation (0.32 eV). Furthermore, when iron ions (Fe3+) were introduced, they displayed appropriate
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Published 05 Oct 2022

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

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  • of CTC. Materials and Methods Preparation of photocatalysts The preparation of Bi2O3. Briefly, 5 g of Bi (NO3)3·5H2O was added into a crucible, then heated to 520 °C at a heating rate of 5 °C/min, and maintained for 2 h. Next, it was naturally cooled to room temperature and the resulting yellow bulks
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Published 28 Sep 2022

Analytical and numerical design of a hybrid Fabry–Perot plano-concave microcavity for hexagonal boron nitride

  • Felipe Ortiz-Huerta and
  • Karina Garay-Palmett

Beilstein J. Nanotechnol. 2022, 13, 1030–1037, doi:10.3762/bjnano.13.90

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  • ] (e.g., quantum computation [2] and quantum networks [3]). Color centers in 2D hBN and diamonds are among the most promising candidates for solid-state single-photon emission at room temperature [4][5]. Nonetheless, in contrast with bulk diamond, the 2D nature of hBN, hosting color centers (i.e., in
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Published 27 Sep 2022

Influence of water contamination on the sputtering of silicon with low-energy argon ions investigated by molecular dynamics simulations

  • Grégoire R. N. Defoort-Levkov,
  • Alan Bahm and
  • Patrick Philipp

Beilstein J. Nanotechnol. 2022, 13, 986–1003, doi:10.3762/bjnano.13.86

Graphical Abstract
  • ., a few hundred picoseconds in simulations compared to µs in experiments) leading to an overall higher irradiation density yet keeping the sample at room temperature. To reproduce an ion beam, the initial positions of the argon ions were randomized in the surface plane. Each simulation set consisted
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Published 21 Sep 2022

Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge

  • Dick Hartmann Douma,
  • Lodvert Tchibota Poaty,
  • Alessio Lamperti,
  • Stéphane Kenmoe,
  • Abdulrafiu Tunde Raji,
  • Alberto Debernardi and
  • Bernard M’Passi-Mabiala

Beilstein J. Nanotechnol. 2022, 13, 975–985, doi:10.3762/bjnano.13.85

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  • ; Introduction The search for room-temperature magnetic semiconductors has been the driving force behind the increasing interest of material scientists and solid-state physicists in magnetic oxides [1]. This is due to their potential applications as building block of spintronic devices. Magnetic oxides are
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Published 15 Sep 2022

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

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  • (standard microscopy slides (soda lime glass); Carl Roth GmbH & Co. KG, Karlsruhe, Germany) with the same propolis sample. Experiments were carried out at room temperature (24.00 ± 0.53 °C) and a relative humidity of 36.80% ± 9.0%. For every condition, 50–150 single tests were performed on different spots
  • prepared mandibles washed with water (BM H2O), prepared mandibles washed with chloroform and water (BM chloroform), prepared mandibles washed with acetone and water (BM acetone). All experiments were conducted using the micro-force tester Basalt-01 at room temperature (24 °C) with a maximum applied force
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Published 14 Sep 2022

DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection

  • Nathalie B. F. Almeida,
  • Thiago A. S. L. Sousa,
  • Viviane C. F. Santos,
  • Camila M. S. Lacerda,
  • Thais G. Silva,
  • Rafaella F. Q. Grenfell,
  • Flavio Plentz and
  • Antero S. R. Andrade

Beilstein J. Nanotechnol. 2022, 13, 873–881, doi:10.3762/bjnano.13.78

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  • , and T at each position and was purchased from IDT DNA Technologies [18]. CE-SELEX Three CE-SELEX selection cycles were performed. To initiate in vitro selection, 800 μM ssDNA was heated at 95 °C for 5 min, snap-cooled on ice for 15 min and left at room temperature for 10 min. After that, it was
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Published 02 Sep 2022

Self-assembly of C60 on a ZnTPP/Fe(001)–p(1 × 1)O substrate: observation of a quasi-freestanding C60 monolayer

  • Guglielmo Albani,
  • Michele Capra,
  • Alessandro Lodesani,
  • Alberto Calloni,
  • Gianlorenzo Bussetti,
  • Marco Finazzi,
  • Franco Ciccacci,
  • Alberto Brambilla,
  • Lamberto Duò and
  • Andrea Picone

Beilstein J. Nanotechnol. 2022, 13, 857–864, doi:10.3762/bjnano.13.76

Graphical Abstract
  • sublimated by Knudsen effusion cells. The deposition flux was 0.5 ML/min, with 1 ML = 3.06 Å, as monitored by a quartz microbalance. C60 was evaporated on top of 1 ML ZnTPP/Fe(001)–p(1 × 1)O. STM images have been acquired at room temperature in constant-current mode with custom-made electrochemically etched
  • W tips. Scanning tunneling spectroscopy (STS) data, that is, dI/dV curves for the investigation of the sample density of states (DOS), have been collected at room temperature, using a lock-in amplifier with a modulation amplitude of 60 mV. All STM and STS measurements have been carried out while
  • the deposition has been performed with the substrate kept at room temperature, we can estimate that Ed for C60 diffusing on ZnTPP is significantly lower than 25 meV. It is worth to notice that the ZnTPP buffer layer remarkably decreases Ed with respect to the case of C60 deposited at room temperature
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Published 30 Aug 2022

Ultrafast signatures of magnetic inhomogeneity in Pd1−xFex (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

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  • contents of 3.8, 6.2 and 8.0 atom %. At room temperature, the behavior of the responses for the films with 3.8 and 6.2 atom % of iron is similar to the responses obtained from the pure Pd film. The abovementioned fast component for these films has approximately the same lifetime, ≈0.3 ps. The lifetime of
  • transients shown in Figure 1. In panel (a) the amplitude As for each sample is normalized to its magnitude at room temperature. Temperature dependences of the amplitudes of the fast (squares/solid lines) (a) and the slow (circles/dashed lines) (c) photoinduced demagnetization components; characteristic times
  • measurements at temperatures from 4.2 to 300 K, the films under study were mounted to the cold finger of the Janis ST-500 helium-flow cryostat. Permanent NdFeB magnets were fixed there, creating a magnetic field directed along the easy axis of the thin film in its plane with a magnitude of 470 Oe at room
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Published 25 Aug 2022

Temperature and chemical effects on the interfacial energy between a Ga–In–Sn eutectic liquid alloy and nanoscopic asperities

  • Yujin Han,
  • Pierre-Marie Thebault,
  • Corentin Audes,
  • Xuelin Wang,
  • Haiwoong Park,
  • Jian-Zhong Jiang and
  • Arnaud Caron

Beilstein J. Nanotechnol. 2022, 13, 817–827, doi:10.3762/bjnano.13.72

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  • interfacial energies between a eutectic Ga–In–Sn liquid alloy and single nanoscopic asperities of SiOx, Au, and PtSi have been determined in the temperature range between room temperature and 90 °C by atomic force spectroscopy. For all asperities used here, we find that the interfacial tension of the eutectic
  • , on the one hand, and their non-toxicity and low vapor pressure, on the other hand. Room-temperature-liquid Ga-based alloys are considered for direct writing and printing stretchable and flexible electronic devices, such as antennas or wires [5][6][7]. Such applications and the related processing of
  • liquid metals strongly depend on their surface and interfacial properties. The surface tension of room-temperature-liquid Ga-based alloys has been reported to be lowered by a thin surface oxide layer [8]. In [9], the authors electrochemically controlled the growth and removal of gallium oxide to tune the
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Published 23 Aug 2022

Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production

  • Chun-Da Liao,
  • Andrea Capasso,
  • Tiago Queirós,
  • Telma Domingues,
  • Fatima Cerqueira,
  • Nicoleta Nicoara,
  • Jérôme Borme,
  • Paulo Freitas and
  • Pedro Alpuim

Beilstein J. Nanotechnol. 2022, 13, 796–806, doi:10.3762/bjnano.13.70

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  • until the furnace reached room temperature. Graphene transfer For the preparation of the various PMMA solutions, PMMA-15k (Sigma-Aldrich, 200336) and PMMA-550k (Alfa Aesar, 43982) powders were dissolved in anisole (Merck, 801452) in different proportions, as indicated in Table 1. PMMA-950k (MicroChem
  • up with a target substrate (SiO2/Si wafer). The sample was dried in a vacuum chamber (ca. 10−4 Torr) at room temperature for 2 h. For PMMA removal, the entire sample was vertically dipped into an acetone bath for 4 h. After that, the exposed graphene on a SiO2/Si substrate was again vertically dipped
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Published 18 Aug 2022

Gelatin nanoparticles with tunable mechanical properties: effect of crosslinking time and loading

  • Agnes-Valencia Weiss,
  • Daniel Schorr,
  • Julia K. Metz,
  • Metin Yildirim,
  • Saeed Ahmad Khan and
  • Marc Schneider

Beilstein J. Nanotechnol. 2022, 13, 778–787, doi:10.3762/bjnano.13.68

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  • loading of FITC-dextran was determined by dissolving the gelatin network using enzymatic degradation. The fluorescence intensity of the resulting solution was measured [18]. Therefore, 5 mg of freeze-dried GNPs were dispersed in 5 mL PBS containing 2.5 mg trypsin at room temperature. After 6 h of
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Published 16 Aug 2022

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

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  • samples are i) the high cost of the enzyme, ii) low stability of biomolecules at room temperature, and iii) difficulties in using interference-free selective detection of a specific OP. However, nonenzymatic electrochemical nanosensors could easily be employed as rapid, cost-effective, easy-to-handle
  • detection limit and long-term stability at room temperature. Graphene oxide (GO), consisting of a monolayer of sp2-hybridized carbon atom network, has already been used in electrocatalysis, nanoelectronics, bionanosensors, and sustainable energy storage systems due to its larger active surface area
  • 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
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Published 28 Jul 2022

Nanoarchitectonics of the cathode to improve the reversibility of Li–O2 batteries

  • Hien Thi Thu Pham,
  • Jonghyeok Yun,
  • So Yeun Kim,
  • Sang A Han,
  • Jung Ho Kim,
  • Jong-Won Lee and
  • Min-Sik Park

Beilstein J. Nanotechnol. 2022, 13, 689–698, doi:10.3762/bjnano.13.61

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  • poured into a 200 mL Teflon-lined autoclave for heating at 90 °C for 6 h. After the temperature naturally dropped down to room temperature, the ZnxCoy/CNT precipitate was collected by vacuum filtration, washed with methanol, and then dried at 80 °C. After carbonization at 900 °C for 6 h under Ar
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Published 21 Jul 2022
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