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Search for "copper" in Full Text gives 540 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

  • William W. Bryan,
  • Riddhiman Medhi,
  • Maria D. Marquez,
  • Supparesk Rittikulsittichai,
  • Michael Tran and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

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  • , these hydrogel polymers shrink and release water and other materials encapsulated inside. Typically, gold, silver, and copper are the most commonly used materials for NIR activation, with silver being intermediate in both cost and oxidation resistance. Previous efforts have reported the combination of
  • particles, THPC gold-seeded hydrogel particles, and silver nanocapsules were deposited on 300 mesh holey-carbon-coated copper grids and dried overnight before analysis by TEM. We utilized a Cary 50 Scan UV–vis optical spectrometer (Varian) equipped with Cary Win UV software over the wavelength range of 300
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Published 04 Oct 2019

Synthesis and potent cytotoxic activity of a novel diosgenin derivative and its phytosomes against lung cancer cells

  • Liang Xu,
  • Dekang Xu,
  • Ziying Li,
  • Yu Gao and
  • Haijun Chen

Beilstein J. Nanotechnol. 2019, 10, 1933–1942, doi:10.3762/bjnano.10.189

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  • under ambient conditions with a silicon cantilever with L = 115 μm, W = 25 μm, and T = 605 nm. For TEM measurements, the DiP and P2P were diluted with ddH2O to a concentration of 10 μg/mL. 8.5 μL of the dispersion was dripped on the copper grid and dried in air overnight before imaging. Cell cultures
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Published 24 Sep 2019

Facile synthesis of carbon nanotube-supported NiO//Fe2O3 for all-solid-state supercapacitors

  • Shengming Zhang,
  • Xuhui Wang,
  • Yan Li,
  • Xuemei Mu,
  • Yaxiong Zhang,
  • Jingwei Du,
  • Guo Liu,
  • Xiaohui Hua,
  • Yingzhuo Sheng,
  • Erqing Xie and
  • Zhenxing Zhang

Beilstein J. Nanotechnol. 2019, 10, 1923–1932, doi:10.3762/bjnano.10.188

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  • existence of C, O, and Fe elements (Figure 2f, Cu signal is due to the copper grid). The crystallographic structures of the samples are shown in Figure 3a. Excluding the peaks of CC-CNT, all other diffraction peaks can be assigned to Fe2O3 (JCPDS Card No. 25-1402). The samples show the same XRD features at
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Published 23 Sep 2019

Microfluidic manufacturing of different niosomes nanoparticles for curcumin encapsulation: Physical characteristics, encapsulation efficacy, and drug release

  • Mohammad A. Obeid,
  • Ibrahim Khadra,
  • Abdullah Albaloushi,
  • Margaret Mullin,
  • Hanin Alyamani and
  • Valerie A. Ferro

Beilstein J. Nanotechnol. 2019, 10, 1826–1832, doi:10.3762/bjnano.10.177

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  • °C. Niosome morphology The morphological examination of the prepared niosomes was determined using transmission electron microscope (TEM). Briefly, carbon-coated copper grids (400 mesh, agar scientific) were glow discharged in air for 30 seconds. Sample solution (3 µL) was drop-cast on the grids and
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Published 05 Sep 2019

Toxicity and safety study of silver and gold nanoparticles functionalized with cysteine and glutathione

  • Barbara Pem,
  • Igor M. Pongrac,
  • Lea Ulm,
  • Ivan Pavičić,
  • Valerije Vrček,
  • Darija Domazet Jurašin,
  • Marija Ljubojević,
  • Adela Krivohlavek and
  • Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2019, 10, 1802–1817, doi:10.3762/bjnano.10.175

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  • spectrometer (ICPMS) (Agilent, Waldbronn, Germany). Visualization was performed using a TEM 902A instrument (Carl Zeiss Meditec AG, Jena, Germany). The microscope was operated in the bright-field mode and at an acceleration voltage of 80 kV. The TEM samples were prepared on a Formvar®-coated copper grid (SPI
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Published 02 Sep 2019

Synthesis of nickel/gallium nanoalloys using a dual-source approach in 1-alkyl-3-methylimidazole ionic liquids

  • Ilka Simon,
  • Julius Hornung,
  • Juri Barthel,
  • Jörg Thomas,
  • Maik Finze,
  • Roland A. Fischer and
  • Christoph Janiak

Beilstein J. Nanotechnol. 2019, 10, 1754–1767, doi:10.3762/bjnano.10.171

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  • copper or gold grids. The size distribution was determined manually or with the aid of the Gatan Digital Micrograph software from at least 50 individual particles. Selected-area electron diffraction (SAED) patterns have been recorded with the above mentioned TEM instruments. The area selection was
  • samples of copper, silver and gold at 50 eV and 10 eV pass energy and comparison with reference values. Spectra were obtained with an Al Kα X-ray source, using C 1s as a reference for the binding energy [50]. Gas chromatography–mass spectrometry (GC–MS) data were recorded on a Thermo Finnigan Trace DSQ
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Published 21 Aug 2019

Subsurface imaging of flexible circuits via contact resonance atomic force microscopy

  • Wenting Wang,
  • Chengfu Ma,
  • Yuhang Chen,
  • Lei Zheng,
  • Huarong Liu and
  • Jiaru Chu

Beilstein J. Nanotechnol. 2019, 10, 1636–1647, doi:10.3762/bjnano.10.159

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  • contact stiffness contrasts are shown in Figure 7d–f. Among these materials, copper is frequently used to fabricate flexible circuits and PI is often serves as the substrate material in industrial productions. From the results, it can be concluded that for the layer thicknesses in our experiments, a
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Published 07 Aug 2019

Flexible freestanding MoS2-based composite paper for energy conversion and storage

  • Florian Zoller,
  • Jan Luxa,
  • Thomas Bein,
  • Dina Fattakhova-Rohlfing,
  • Daniel Bouša and
  • Zdeněk Sofer

Beilstein J. Nanotechnol. 2019, 10, 1488–1496, doi:10.3762/bjnano.10.147

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  • potential was even lower (approximately −0.1 V vs RHE) after treatment with n-butyllithium, suggesting the introduction of new active sites. Finally, a potential use in lithium ion batteries (LIB) was examined. Our material can be used directly without any binder, additive carbon or copper current collector
  • slurry, which is then coated onto a copper foil (current collector). The copper foil and the additives increase the overall weight, which dramatically decreases the gravimetric energy density. These electrodes are not applicable as anodes in flexible batteries due to the loss of contact between the
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Published 24 Jul 2019

Construction of a 0D/1D composite based on Au nanoparticles/CuBi2O4 microrods for efficient visible-light-driven photocatalytic activity

  • Weilong Shi,
  • Mingyang Li,
  • Hongji Ren,
  • Feng Guo,
  • Xiliu Huang,
  • Yu Shi and
  • Yubin Tang

Beilstein J. Nanotechnol. 2019, 10, 1360–1367, doi:10.3762/bjnano.10.134

Graphical Abstract
  • state of Au on Au/CBO is Au0 [10]. The peaks at 934.1 and 953.8 eV in Figure 5b can be ascribed to Cu 2p3/2 and Cu 2p1/2, respectively [12]. The two peaks at 942.3 and 962.6 eV are satellite peaks of Cu 2p, further confirming that copper in the composite exist in a divalent state [31]. In the Bi 4f
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Published 04 Jul 2019

Janus-micromotor-based on–off luminescence sensor for active TNT detection

  • Ye Yuan,
  • Changyong Gao,
  • Daolin Wang,
  • Chang Zhou,
  • Baohua Zhu and
  • Qiang He

Beilstein J. Nanotechnol. 2019, 10, 1324–1331, doi:10.3762/bjnano.10.131

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  • analyzed using Origin 8 software. Characterization SEM imaging was carried out by dropping sample solutions onto the surface of silicon wafer. After drying, samples were observed using a Hitachi S-5200 microscope. For TEM observation, samples were dropped onto the carbon film of the copper grids and
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Published 28 Jun 2019

Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices

  • Giulia Lo Dico,
  • Bernd Wicklein,
  • Lorenzo Lisuzzo,
  • Giuseppe Lazzara,
  • Pilar Aranda and
  • Eduardo Ruiz-Hitzky

Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129

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  • by coupling the bioactive foam, as anode, to a Pt wire as cathode in a one-pot cell working in 0.1 M of glucose and 0.1 M PBS, at two different pH values (7 and 5.5) and saturated with air. The foam was connected to the potentiostat with a copper wire, glued with colloidal graphite and covered by an
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Published 25 Jun 2019

A silver-nanoparticle/cellulose-nanofiber composite as a highly effective substrate for surface-enhanced Raman spectroscopy

  • Yongxin Lu,
  • Yan Luo,
  • Zehao Lin and
  • Jianguo Huang

Beilstein J. Nanotechnol. 2019, 10, 1270–1279, doi:10.3762/bjnano.10.126

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  • , a small piece of the corresponding sample was cut from the sheet and stirred in 5.0 mL of ethanol overnight to yield a suspension, which was dripped onto a carbon-coated copper grid followed and dried in air. TEM and high-resolution TEM (HR-TEM) images were acquired using a Hitachi HT-7700
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Published 24 Jun 2019

CuInSe2 quantum dots grown by molecular beam epitaxy on amorphous SiO2 surfaces

  • Henrique Limborço,
  • Pedro M.P. Salomé,
  • Rodrigo Ribeiro-Andrade,
  • Jennifer P. Teixeira,
  • Nicoleta Nicoara,
  • Kamal Abderrafi,
  • Joaquim P. Leitão,
  • Juan C. Gonzalez and
  • Sascha Sadewasser

Beilstein J. Nanotechnol. 2019, 10, 1103–1111, doi:10.3762/bjnano.10.110

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  • with the average size of the nanodots. Keywords: copper indium gallium selenide (CuInSe2); quantum dots; Introduction The chalcopyrite compound Cu(In,Ga)Se2 (CIGS) is used as the light absorber layer in thin film solar cells that typically consist of a glass substrate, a Mo back contact, the CIGS
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Published 22 May 2019

Scavenging of reactive oxygen species by phenolic compound-modified maghemite nanoparticles

  • Małgorzata Świętek,
  • Yi-Chin Lu,
  • Rafał Konefał,
  • Liliana P. Ferreira,
  • M. Margarida Cruz,
  • Yunn-Hwa Ma and
  • Daniel Horák

Beilstein J. Nanotechnol. 2019, 10, 1073–1088, doi:10.3762/bjnano.10.108

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  • catalyzed by metal-ion cofactors, such as iron, copper, zinc, and manganese [3]. The non-enzymatic antioxidant defense uses glutathione, vitamins C and E, melatonin, catecholamines, and substances of plant origin, such as phenols and carotenoids, to interrupt undesirable ROS action. Phenolic compounds are
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Published 20 May 2019
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  • samples for TEM analysis were obtained by mixing the AuNT solution (0.2 mg/mL in Au) 1:5 with a 10 mg/mL aqueous solution of polyvinyl alcohol (PVA, 200,000 Mw, on average, from Fluka) and depositing one drop on a copper grid coated with a holey carbon film, according to a well-established procedure which
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Published 10 May 2019

Electronic and magnetic properties of doped black phosphorene with concentration dependence

  • Ke Wang,
  • Hai Wang,
  • Min Zhang,
  • Yan Liu and
  • Wei Zhao

Beilstein J. Nanotechnol. 2019, 10, 993–1001, doi:10.3762/bjnano.10.100

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  • experimentally demonstrated that substitutional doping of TMDs could be achieved by filling the vacancies observed in CVD-grown monolayer TMDs [18]. Liu et al. [19] prepared epitaxial copper-doped ZnO films and observed that the substitution of Cu for Zn and the presence of strong Cu–Zn–O bonds are necessary for
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Published 02 May 2019

Direct growth of few-layer graphene on AlN-based resonators for high-sensitivity gravimetric biosensors

  • Jimena Olivares,
  • Teona Mirea,
  • Lorena Gordillo-Dagallier,
  • Bruno Marco,
  • José Miguel Escolano,
  • Marta Clement and
  • Enrique Iborra

Beilstein J. Nanotechnol. 2019, 10, 975–984, doi:10.3762/bjnano.10.98

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  • typically transferred to the active area of the devices after being grown at high temperatures on copper catalysts [14], or from liquid suspensions [15], but never directly grown on top of the resonators. However, not all the applications require high-quality single-layer graphene; in fact, few-layer
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Published 29 Apr 2019

Effects of gold and PCL- or PLLA-coated silica nanoparticles on brain endothelial cells and the blood–brain barrier

  • Aniela Bittner,
  • Angélique D. Ducray,
  • Hans Rudolf Widmer,
  • Michael H. Stoffel and
  • Meike Mevissen

Beilstein J. Nanotechnol. 2019, 10, 941–954, doi:10.3762/bjnano.10.95

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  • . None of the NPs investigated impaired expression, integrity or functionality of TJs. In accordance with our findings, PEGylated Au-NPs did not alter TJ expression, TEER or Papp of a co-culture model consisting of PBECs and SH-SY5Y [24]. Copper and Ag-NPs on the other hand led to an increase in
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Published 25 Apr 2019

Comparing a porphyrin- and a coumarin-based dye adsorbed on NiO(001)

  • Sara Freund,
  • Antoine Hinaut,
  • Nathalie Marinakis,
  • Edwin C. Constable,
  • Ernst Meyer,
  • Catherine E. Housecroft and
  • Thilo Glatzel

Beilstein J. Nanotechnol. 2019, 10, 874–881, doi:10.3762/bjnano.10.88

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  • of the semiconductor. Typically, dyes are specifically designed to be compatible with one or the other type of device. Consequently, the careful choice of the dye is crucial for the optimal function of n- or p-type DSSCs. Because of its electron-donor character, copper(II) meso-tetrakis(4
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Published 15 Apr 2019

Co-doped MnFe2O4 nanoparticles: magnetic anisotropy and interparticle interactions

  • Bagher Aslibeiki,
  • Parviz Kameli,
  • Hadi Salamati,
  • Giorgio Concas,
  • Maria Salvador Fernandez,
  • Alessandro Talone,
  • Giuseppe Muscas and
  • Davide Peddis

Beilstein J. Nanotechnol. 2019, 10, 856–865, doi:10.3762/bjnano.10.86

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  • the Miller indices. Transmission electron microscopy (TEM) analysis was performed with a JEM-2100 instrument using an accelerating voltage of 200 kV, with the nanoparticles deposited on a copper grid. The average particle size was obtained by measuring the diameter of more than 100 particles randomly
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Published 12 Apr 2019

Novel reversibly switchable wettability of superhydrophobic–superhydrophilic surfaces induced by charge injection and heating

  • Xiangdong Ye,
  • Junwen Hou and
  • Dongbao Cai

Beilstein J. Nanotechnol. 2019, 10, 840–847, doi:10.3762/bjnano.10.84

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  • different sizes using a voltage of 3 V and a 25 V electrical wetting. The maximum contact angle decreased from 150 ± 0.1° to 20° and the contact-angle saturation conditions changed with droplet size. Zahiri et al. [27] reported the reversible active control of surface wettability of copper electrodeposition
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Published 10 Apr 2019

Tungsten disulfide-based nanocomposites for photothermal therapy

  • Tzuriel Levin,
  • Hagit Sade,
  • Rina Ben-Shabbat Binyamini,
  • Maayan Pour,
  • Iftach Nachman and
  • Jean-Paul Lellouche

Beilstein J. Nanotechnol. 2019, 10, 811–822, doi:10.3762/bjnano.10.81

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  • -Twin microscope (FEI, Hillsboro, OR, US) equipped with a 1k × 1k CCD camera (Gatan, Pleasanton, CA, US). Samples for TEM analysis were dispersed in water. A drop of the dispersion was placed on a formvar/carbon film on a 400-mesh copper TEM grid (FCF400-Cu, Electron Microscopy Sciences, Hatfield, PA
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Published 02 Apr 2019

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

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  • ), titanium tetraisopropoxide (Ti{OCH(CH3)2}4, 97%), N,N-dimethylformamide (DMF, 99.8%), copper(II) nitrate trihydrate ((CuNO3)2·3H2O, 98%), 2-propanol (IPA, 99.5%) and N-methyl-2-pyrrolidinone (NMP, 99.5%) were purchased from Sigma-Aldrich and used as received without any further purification. Synthesis of
  • copper(II) nitrate trihydrate [(CuNO3)2·3H2O] was added to this solution and stirred for further 30 min. The blended solution was loaded into a 10 mL disposable syringe with a needle diameter of 0.5 mm, pumped at a speed of 0.3 mL h−1 using a syringe pump. Aluminium foil was used as a collector, and the
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Published 01 Apr 2019

Renewable energy conversion using nano- and microstructured materials

  • Harry Mönig and
  • Martina Schmid

Beilstein J. Nanotechnol. 2019, 10, 771–773, doi:10.3762/bjnano.10.76

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  • : materials and devices” covers the photo-electrochemical growth of platinum catalysts at plasmonic hot spots [6], the laser-assisted local growth of chalcopyrite absorbers [4], the preferential reactive ion etching of silicon by morphological anisotropies [5], the oxidation of copper nanoparticles resulting
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Published 26 Mar 2019

On the transformation of “zincone”-like into porous ZnO thin films from sub-saturated plasma enhanced atomic layer deposition

  • Alberto Perrotta,
  • Julian Pilz,
  • Stefan Pachmajer,
  • Antonella Milella and
  • Anna Maria Coclite

Beilstein J. Nanotechnol. 2019, 10, 746–759, doi:10.3762/bjnano.10.74

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  • with a copper tube (λ = 1.5418 Å). The beam was further parallelized with a layered X-ray mirror and a PIXcel3D-detector that was operated in 1D-mode. A 1/8° divergence, a 10 mm mask, and a P7.5 anti-scatter slit were used in the setup. In situ temperature-dependent XRD studies were performed with a
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Published 21 Mar 2019
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