Green and energy-efficient methods for the production of metallic nanoparticles

• Mitra Naghdi,
• Mehrdad Taheran,
• Satinder K. Brar,
• M. Verma,
• R. Y. Surampalli and
• J. R. Valero

Beilstein J. Nanotechnol. 2015, 6, 2354–2376, doi:10.3762/bjnano.6.243

• surface of NPs which is responsible for the electrostatic repulsion and consequently stability at wide range of pH (2–10) and electrolyte concentration (up to 10−2 M of NaCl) [63]. Thekkae Padil and Cernik used gum karaya (GK) to produce copper oxide (CuO) NPs from CuCl2 at 75 °C for 60 min. According to

NanoE-Tox: New and in-depth database concerning ecotoxicity of nanomaterials

• Katre Juganson,
• Angela Ivask,
• Irina Blinova,
• Monika Mortimer and
• Anne Kahru

Beilstein J. Nanotechnol. 2015, 6, 1788–1804, doi:10.3762/bjnano.6.183

• oxide (CuO), and iron oxide (FeOx; Fe2O3, Fe3O4). Altogether, NanoE-Tox database consolidates data from 224 articles and lists altogether 1,518 toxicity values (EC50/LC50/NOEC) with corresponding test conditions and physico-chemical parameters of the ENMs as well as reported toxicity mechanisms and

• sensitive organism (data derived from three or more articles) the toxicity order was as follows: Ag > ZnO > CuO > CeO2 > CNTs > TiO2 > FeOx. We believe NanoE-Tox database contains valuable information for ENM environmental hazard estimation and development of models for predicting toxic potential of ENMs

• : carbon nanotubes (CNTs), fullerenes, silver (Ag), titanium dioxide (TiO2), zinc oxide (ZnO), cerium dioxide (CeO2), copper oxide (CuO), and iron oxide (FeOx; Fe2O3, Fe3O4). Furthermore, all these ENMs, except CuO, are listed by the Organisation for Economic Co-operation and Development (OECD) Working

Effects of swift heavy ion irradiation on structural, optical and photocatalytic properties of ZnO–CuO nanocomposites prepared by carbothermal evaporation method

• Sini Kuriakose,
• D. K. Avasthi and
• Satyabrata Mohapatra

Beilstein J. Nanotechnol. 2015, 6, 928–937, doi:10.3762/bjnano.6.96

• Sini Kuriakose D. K. Avasthi Satyabrata Mohapatra School of Basic and Applied Sciences, Guru Gobind Singh Indraprastha University, Dwarka, New Delhi 110078, India Inter University Accelerator Centre, New Delhi 110067, India 10.3762/bjnano.6.96 Abstract ZnO–CuO nanocomposite thin films were

• prepared by carbothermal evaporation of ZnO and Cu, combined with annealing. The effects of 90 MeV Ni7+ ion irradiation on the structural and optical properties of ZnO–CuO nanocomposites were studied by using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), UV–visible

• absorption spectroscopy and Raman spectroscopy. XRD studies showed the presence of ZnO and CuO nanostructures in the nanocomposites. FESEM images revealed the presence of nanosheets and nanorods in the nanocomposites. The photocatalytic activity of ZnO–CuO nanocomposites was evaluated on the basis of

Structure and mechanism of the formation of core–shell nanoparticles obtained through a one-step gas-phase synthesis by electron beam evaporation

• Andrey V. Nomoev,
• Sergey P. Bardakhanov,
• Makoto Schreiber,
• Dashima G. Bazarova,
• Nikolai A. Romanov,
• Boris B. Baldanov,
• Bair R. Radnaev and
• Viacheslav V. Syzrantsev

Beilstein J. Nanotechnol. 2015, 6, 874–880, doi:10.3762/bjnano.6.89

• work can aid future researchers hoping to produce new types of core–shell particles using the electron beam evaporation method. Results and Discussion Structure of Cu@silica particles In the original work [7], XRD analysis on the bulk Cu@silica samples revealed Cu, Cu2O, and CuO phases in the powder. A

• different contrast were also observed on the surface of some shells and were identified to be CuO and Cu2O by SAED measurements. Thus, after formation of the shell, some copper had also adsorbed onto the shell surface. These were likely oxidized after the nanoparticles were exposed to the air. In addition

Overview of nanoscale NEXAFS performed with soft X-ray microscopes

• Peter Guttmann and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2015, 6, 595–604, doi:10.3762/bjnano.6.61

• NEXAFS-TXM. As a result of this investigation it was found that neither Cd nor S diffuse into the CuO phase after the deposition of CdS on the CuO nanowires [60][61]. The possibility to study the oxidation state of Mn dopants in titanate nanostructures was reported in [62]. Additionally, using the

Inorganic Janus particles for biomedical applications

• Isabel Schick,
• Steffen Lorenz,
• Dominik Gehrig,
• Stefan Tenzer,
• Wiebke Storck,
• Karl Fischer,
• Dennis Strand,
• Frédéric Laquai and
• Wolfgang Tremel

Beilstein J. Nanotechnol. 2014, 5, 2346–2362, doi:10.3762/bjnano.5.244

• -nanoparticles. This was demonstrated for the first time by the formation of Cu@Fe3O4 heterodimers [57], which was an unexpected result due to the high stability of binary copper oxides, e.g., CuO, Cu2O, as well as the ternary phases CuFe2O4, copper substituted Fe3O4, or CuFeO2. In comparison to solid state

Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays

• Christoph Rehbock,
• Jurij Jakobi,
• Lisa Gamrad,
• Selina van der Meer,
• Daniela Tiedemann,
• Ulrike Taylor,
• Wilfried Kues,
• Detlef Rath and
• Stephan Barcikowski

Beilstein J. Nanotechnol. 2014, 5, 1523–1541, doi:10.3762/bjnano.5.165

• [156], TiO2, ZnO [157], Ni, NiTi, NiFe, Ti [11] and MoS2 [158] on the viability of mammalian cell lines were studied. Furthermore, some studies addressed antimicrobial effects of Ni [159] and Ag nanoparticles [160][161]. Additionally, some authors reported on the application of laser-fabricated CuO

Organic and inorganic–organic thin film structures by molecular layer deposition: A review

• Pia Sundberg and
• Maarit Karppinen

Beilstein J. Nanotechnol. 2014, 5, 1104–1136, doi:10.3762/bjnano.5.123

Integration of ZnO and CuO nanowires into a thermoelectric module

• Dario Zappa,
• Simone Dalola,
• Guido Faglia,
• Elisabetta Comini,
• Matteo Ferroni,
• Caterina Soldano,
• Vittorio Ferrari and
• Giorgio Sberveglieri

Beilstein J. Nanotechnol. 2014, 5, 927–936, doi:10.3762/bjnano.5.106

• , 25123, Brescia, Italy Dipartimento di Ingegneria dell’Informazione, University of Brescia, via Branze 38, 25123, Brescia, Italy Currently at ETCs.r.l., via Gobetti 101, 40129 Bologna, Italy 10.3762/bjnano.5.106 Abstract Zinc oxide (ZnO, n-type) and copper oxide (CuO, p-type) nanowires have been

• experimental set-up, leading to results in agreement with available literature with potential improvement. Combining bundles of ZnO and CuO nanowires in a series of five thermocouples on alumina leads to a macroscopic prototype of a planar thermoelectric generator (TEG) unit. This demonstrates the possibility

• the power supply. A thermoelectric device mainly consists of a series of elementary thermoelectric units, which in the simplest assembly consist of a pair of p and n materials. A prototype of thermoelectric module has been fabricated [22], combining five n-(ZnO) and p-type (CuO) nanowires-based

Antimicrobial properties of CuO nanorods and multi-armed nanoparticles against B. anthracis vegetative cells and endospores

• Pratibha Pandey,
• Merwyn S. Packiyaraj,
• Himangini Nigam,
• Gauri S. Agarwal,
• Beer Singh and
• Manoj K. Patra

Beilstein J. Nanotechnol. 2014, 5, 789–800, doi:10.3762/bjnano.5.91

• Devices Division Defence R&D Establishment, New Campus, Jhansi Road, Gwalior, India Defence Laboratory, Jodhpur, India 10.3762/bjnano.5.91 Abstract Two different kinds of CuO nanoparticles (NPs) namely CuO nanorods (PS2) and multi-armed nanoparticles (P5) were synthesized by wet and electrochemical

• oxides have been used in the later work as well. However, the application of corrosive chemicals along with the nanoparticles indicates their limited utility for decontamination of indoors, sensitive equipment and surfaces. Recently we reported strong bactericidal activity of nanometer-scaled CuO against

• a large number of gram-positive and gram-negative bacteria [16]. CuO nanostructures were reported as potential antibacterial agents by other groups as well [17][18][19][20]. Trapalis et al. [17] and Akhavan et al. [18] reported CuO–SiO2 composite thin film and CuO/Cu(OH)2 nanostructure, respectively

Catalytic activity of nanostructured Au: Scale effects versus bimetallic/bifunctional effects in low-temperature CO oxidation on nanoporous Au

• Lu-Cun Wang,
• Yi Zhong,
• Haijun Jin,
• Daniel Widmann,
• Jörg Weissmüller and
• R. Jürgen Behm

Beilstein J. Nanotechnol. 2013, 4, 111–128, doi:10.3762/bjnano.4.13

• fresh sample exhibits a single sharp desorption peak with a maximum at 275 °C, equal to that on the NPG(Ag)-4 catalyst (see Figure 7a). Vacuum-annealing-induced reduction of fully oxidized copper films (2 nm thick, grown by physical vapor deposition) has shown that CuO started to form Cu2O at around 200

Plasmonics-based detection of H₂ and CO: discrimination between reducing gases facilitated by material control

• Gnanaprakash Dharmalingam,
• Nicholas A. Joy,
• Benjamin Grisafe and
• Michael A. Carpenter

Beilstein J. Nanotechnol. 2012, 3, 712–721, doi:10.3762/bjnano.3.81

• sensitivity of the response to parameters such as shape, size and composition of the nanoparticles [14]. Ando et al. have reported, in one of the earlier investigations of sensing at high temperatures, the plasmonic sensing characteristics of Au nanoparticles when embedded in a CuO matrix, at a working

Self-assembled monolayers and titanium dioxide: From surface patterning to potential applications

• Yaron Paz

Beilstein J. Nanotechnol. 2011, 2, 845–861, doi:10.3762/bjnano.2.94

• area. The hydrophobic–hydrophilic patterning is then obtained photocatalytically by exposure of the entire area to UV light, thus, degrading the SAM from the TiO2 domains. This approach was demonstrated with CuO domains prepared by oxidation of Cu that had been deposited by electroless deposition on