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

• ; 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

Engineered titania nanomaterials in advanced clinical applications

• Padmavati Sahare,
• Paulina Govea Alvarez,
• Juan Manual Sanchez Yanez,
• Gabriel Luna-Bárcenas,
• Samik Chakraborty,
• Sujay Paul and
• Miriam Estevez

Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15

• (GNP2) presented good osseointegration [61]. In another recent study, TiO2 nanotubes (TNT) were grown on the surface of medical-grade titanium alloy and then coated with silver nps (Ag nps) to improve the antimicrobial properties of the implants. Moreover, to avoid direct contact of Ag nps with human

• ]. Likewise, silver nps were used to inhibit snake venom toxicity completely [119]. Recently, Chakrabartty et al. found that TiO2 nps are able to neutralize the venom-induced lethal activity of Daboia russelii and Naja kaouthia. Also, hemorrhagic, coagulant, and anticoagulant effects of viper venom were

Modification of a SERS-active Ag surface to promote adsorption of charged analytes: effect of Cu²⁺ ions

• Bahdan V. Ranishenka,
• Andrei Yu. Panarin,
• Irina A. Chelnokova,
• Sergei N. Terekhov,
• Peter Mojzes and
• Vadim V. Shmanai

Beilstein J. Nanotechnol. 2021, 12, 902–912, doi:10.3762/bjnano.12.67

• , caused aggregation of the resulting positively charged Ag NPs. Nevertheless, the proposed approach enabled the successful analysis of a number of negatively charged analytes. Silver NPs treated with polyethylenimine, spermine, or spermidine were successfully used for the detection of negatively charged

• detector (Princeton Instruments). Spectra were excited by a 441.6 nm of a He–Cd laser. Synthesis of silver NPs The synthetic procedure was analogous to that described in [36]. 50 mL of deionized water, 42 mg of sodium bicarbonate, 15 mg sodium citrate, and 450 mg of water-free glucose were added into a

• DMSO at 80 °C for 5 h in the presence of catalytic quantities of sodium iodide. Finally, the substrates were repeatedly rinsed with hot distilled water and dried. Silver NPs adsorptive immobilization kinetics study PEI-modified glass substrates 5 × 10 mm in size were placed in 3 mL (great excess) of Ag

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

• [141]. In addition, the antimicrobial efficiency of silver and copper nanoparticles have also been improved through the development of Si–Ag and Si–Cu NPs. This achievement is specifically important when NPs present cytotoxic effects. Silver NPs were immobilized on hollow silica nanospheres or

Multilayer capsules made of weak polyelectrolytes: a review on the preparation, functionalization and applications in drug delivery

• Varsha Sharma and
• Anandhakumar Sundaramurthy

Beilstein J. Nanotechnol. 2020, 11, 508–532, doi:10.3762/bjnano.11.41

• synthesis of NPs in the shell itself via the polyol reduction method has proved to be effective as it results in a dense and homogenous distribution of the NPs within the capsules [74]. Figure 5a,b shows TEM and AFM images of the successful incorporation and distribution of in situ synthesized silver NPs

Hybrid Au@alendronate nanoparticles as dual chemo-photothermal agent for combined cancer treatment

• Anouchka Plan Sangnier,
• Romain Aufaure,
• Laurence Motte,
• Claire Wilhelm,
• Erwann Guenin and
• Yoann Lalatonne

Beilstein J. Nanotechnol. 2018, 9, 2947–2952, doi:10.3762/bjnano.9.273

• ]. More recently, synthesis of gold and silver NPs have been developed using HMPB molecules [16][17][18]. For gold NPs, HMBPs act as both Au chelating and reducing agent comparable to citrates in the well-known Turkevich–Frens synthesis [19][20]. Besides, gold NPs exhibit a unique surface plasmonic

Synthesis of hafnium nanoparticles and hafnium nanoparticle films by gas condensation and energetic deposition

• Irini Michelakaki,
• Nikos Boukos,
• Dimitrios A. Dragatogiannis,
• Spyros Stathopoulos,
• Costas A. Charitidis and
• Dimitris Tsoukalas

Beilstein J. Nanotechnol. 2018, 9, 1868–1880, doi:10.3762/bjnano.9.179

• the sensitivity of gas sensors [12], twinned silver NPs show important different chemical activity compared to their single crystalline counterparts [13]. These and many other examples illustrate that investigating the morphology and structure of metal NPs is essential for their efficient utilization

Photoluminescence of CdSe/ZnS quantum dots in nematic liquid crystals in electric fields

• Margarita A. Kurochkina,
• Elena A. Konshina and
• Daria Khmelevskaia

Beilstein J. Nanotechnol. 2018, 9, 1544–1549, doi:10.3762/bjnano.9.145

• fields. The control of the QD luminescence in an LC matrix has both scientific and practical interest. The photoluminescence (PL) of liquid crystals doped with silver NPs, carbon nanotubes and quantum semiconductor nanoparticles were discussed in [11][12]. The control of PL of a nematic liquid crystal

Noble metal-modified titania with visible-light activity for the decomposition of microorganisms

• Maya Endo,
• Zhishun Wei,
• Kunlei Wang,
• Baris Karabiyik,
• Kenta Yoshiiri,
• Paulina Rokicka,
• Bunsho Ohtani,
• Agata Markowska-Szczupak and
• Ewa Kowalska

Beilstein J. Nanotechnol. 2018, 9, 829–841, doi:10.3762/bjnano.9.77

• found that gold existed mainly in zero valent form, whereas silver existed in both zero valent and oxidized forms (mainly as Ag+). It is proposed that although zero valent silver NPs were formed during photodeposition (brown colour of suspension, which is characteristic for spherical silver NPs with

• (Figure 4 (right)). The intrinsic absorption of anatase titania was observed at wavelengths shorter than 400 nm (Eg > 3 eV), and LSPR peaks appeared at longer wavelengths for gold NPs (λmax at ca. 560 nm) than for silver NPs (λmax at ca. 450 nm), correlating well with reported data for spherical NPs of

• . The higher activity of Ag/TiO2(FP6) compared to Ag/TiO2(ST01) in the dark is presumably caused by larger NPs of silver in Ag/TiO2(FP6) (Table 1), because there is a tendency that antibacterial activity increases with an increase in the size of silver NPs [65]. Indeed, the highest activity in the dark

The role of ligands in coinage-metal nanoparticles for electronics

• Ioannis Kanelidis and
• Tobias Kraus

Beilstein J. Nanotechnol. 2017, 8, 2625–2639, doi:10.3762/bjnano.8.263

• electron donating hydroxyl groups. The resulting film with the interconnected silver NPs (Figure 7) had a conductivity of 225 S/cm and was used to electrically connect light-emitting diodes [134]. 4 Ligands in particle–polymer composites 4.1 Formulations Metal nanoparticles have been used to fill polymers

• the silver NPs with surfactants resulted in surfactant-coated particles and increased the composite conductivity to 2 × 105 S/cm compared to untreated silver nanoparticles (5 × 10−7 S/cm). Sintering at 150 °C further improved conductivity [137]. Jiang et al. reported the effects of ligand length on

• thiophene ring is shown to form a bond with the silver NPs and resulted in a uniform distribution of the nanoparticles in the composite. Films of the composite prepared by spin coating exhibited a 1.5-times higher electrical conductivity (176 S/cm) compared to films prepared only from the PEDOT:PSS mixture

Synthesis and characterization of noble metal–titania core–shell nanostructures with tunable shell thickness

• Bartosz Bartosewicz,
• Marta Michalska-Domańska,
• Malwina Liszewska,
• Dariusz Zasada and
• Bartłomiej J. Jankiewicz

Beilstein J. Nanotechnol. 2017, 8, 2083–2093, doi:10.3762/bjnano.8.208

• great potential for use in these applications [18][19]. Surface plasmon resonance properties of gold and silver NPs can increase the optical absorption of titania and extend its absorption band to the visible light region. Such CSNs could allow one of the most important limitations in broader use of

• report a general and simple approach to the synthesis of Ag@TiO2 and Au@TiO2 CSNs (Scheme 1). The proposed method works well for both gold and silver NPs without any additional adjustments and without the need for special reaction conditions. It also allows control of the shell thickness in the range of

Advances and challenges in the field of plasma polymer nanoparticles

• Andrei Choukourov,
• Pavel Pleskunov,
• Daniil Nikitin,
• Valerii Titov,
• Artem Shelemin,
• Mykhailo Vaidulych,
• Anna Kuzminova,
• Pavel Solař,
• Jan Hanuš,
• Jaroslav Kousal,
• Ondřej Kylián,
• Danka Slavínská and
• Hynek Biederman

Beilstein J. Nanotechnol. 2017, 8, 2002–2014, doi:10.3762/bjnano.8.200

• weak metal–polymer interaction. As a result, phase-separated core@shell NPs are created, an example of which is shown in Figure 13a. Here, silver NPs enveloped by shells of HMDSO plasma polymer are shown. The structure of the NPs, in which multiple metal inclusions of about 5 nm diameter are

Optical response of heterogeneous polymer layers containing silver nanostructures

• Miriam Carlberg,
• Florent Pourcin,
• Olivier Margeat,
• Judikaël Le Rouzo,
• Gérard Berginc,
• Rose-Marie Sauvage,
• Jörg Ackermann and
• Ludovic Escoubas

Beilstein J. Nanotechnol. 2017, 8, 1065–1072, doi:10.3762/bjnano.8.108

• ; Introduction Noble metal nanoparticles (NPs) are of considerable interest in various domains, ranging from chemistry to medicine and light filtering [1][2][3][4][5][6]. Silver NPs are especially challenging because of the possibility to control the phenomenon of light–matter interaction in the visible

• NPs, the thin film layers will absorb in the visible wavelength range. This leads to applications of plasmonic thin film layers for photodetectors [10], photovoltaics [6][11] or nonreflective coatings [12][13][14]. In this works, silver NPs were chosen for their high electric field enhancement in the

• the addition of Lorentz functions centered at the different energies. In summary, silver NPs that absorb over the entire visible wavelength range were synthesized, and the nature of the absorption peak of the colloidal solution was determined. Additionally, the optical response in thin film layers was

α-((4-Cyanobenzoyl)oxy)-ω-methyl poly(ethylene glycol): a new stabilizer for silver nanoparticles

• Jana Lutze,
• Miguel A. Bañares,
• Marcos Pita,
• Andrea Haase,
• Andreas Luch and
• Andreas Taubert

Beilstein J. Nanotechnol. 2017, 8, 627–635, doi:10.3762/bjnano.8.67

• anchors. Keywords: cyano anchor group; poly(ethylene glycol); polymer coating; silver nanoparticles; Introduction Nanoparticles (NPs), especially metal NPs such as gold and silver NPs (SNPs), are currently among the most popular research subjects and many particles have been suggested for applications

Hydrophilic silver nanoparticles with tunable optical properties: application for the detection of heavy metals in water

• Paolo Prosposito,
• Federico Mochi,
• Erica Ciotta,
• Mauro Casalboni,
• Fabio De Matteis,
• Iole Venditti,
• Laura Fontana,
• Giovanna Testa and
• Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1654–1661, doi:10.3762/bjnano.7.157

• salt (C3H7S2O3Na, 3MPS, Sigma-Aldrich, 98%) were used as received. Deionized water (electrical conductivity less than 1 μΩ/cm at room temperature) was obtained from a Millipore Milli-Q water purification system. Synthesis a: silver NPs (AgNPs) were prepared at room temperature in a single phase system

Tight junction between endothelial cells: the interaction between nanoparticles and blood vessels

• Yue Zhang and
• Wan-Xi Yang

Beilstein J. Nanotechnol. 2016, 7, 675–684, doi:10.3762/bjnano.7.60

• liver, acute inflammation responses and increase the apoptosis of cells. Interestingly, these results are accompanied by an increasing production of reactive oxidative species (ROS) [23]. Silver NPs also hold the ability to generate ROS, which cause oxidative stress [24]. In addition, they can also

Unraveling the neurotoxicity of titanium dioxide nanoparticles: focusing on molecular mechanisms

• Bin Song,
• Yanli Zhang,
• Jia Liu,
• Xiaoli Feng,
• Ting Zhou and
• Longquan Shao

Beilstein J. Nanotechnol. 2016, 7, 645–654, doi:10.3762/bjnano.7.57

• nanoparticles [69]. In addition, copper oxide NPs [70], silica NPs [71], zinc oxide NPs [72], and silver NPs [73] were shown to induce autophagy in in vitro studies. TiO2 NPs were also capable of inducing autophagy. Studies showed that TiO2 NPs could induce autophagy in normal lung cells [74] and in primary

• of the PARP-1 promoter in human keratinocytes (HaCat) [97][98]. Silver NPs had the ability to change DNA methylation as well [99]. In a recent study, DNA methylation status, regulated by DNMTs in the A549 cell line, could be altered by oxidative stress induced by TiO2 NPs [100]. As OS is a main

Sonochemical co-deposition of antibacterial nanoparticles and dyes on textiles

• Ilana Perelshtein,
• Anat Lipovsky,
• Nina Perkas,
• Tzanko Tzanov and
• Aharon Gedanken

Beilstein J. Nanotechnol. 2016, 7, 1–8, doi:10.3762/bjnano.7.1

• is the direct impregnation of textiles in the reactant solution. Other methods such as chemical vapor deposition (CVD) of silver NPs on textiles have also been used [1]. Among the various other coating techniques the sonochemical immobilization was carried out on a large variety of substrates

Protein corona – from molecular adsorption to physiological complexity

• Lennart Treuel,
• Dominic Docter,
• Michael Maskos and
• Roland H. Stauber

Beilstein J. Nanotechnol. 2015, 6, 857–873, doi:10.3762/bjnano.6.88

• silver NPs it was shown that their cytotoxicity is predominantly caused by the release of silver ions even when polymer coatings were applied [25][113][153]. The somewhat independent modes of action of the NP surface and the core need therefore to be considered in detail to assess the biological impact

Influence of size, shape and core–shell interface on surface plasmon resonance in Ag and Ag@MgO nanoparticle films deposited on Si/SiO_x

• Sergio D’Addato,
• Daniele Pinotti,
• Maria Chiara Spadaro,
• Guido Paolicelli,
• Vincenzo Grillo,
• Sergio Valeri,
• Luca Pasquali,
• Luca Bergamini and
• Stefano Corni

Beilstein J. Nanotechnol. 2015, 6, 404–413, doi:10.3762/bjnano.6.40

• optical behaviour of the substrate is determined by Si only, that is, that the contribution of a possible top Si oxide layer is negligible (see Supporting Information File 1). This hypothesis is reinforced by the low value of the thickness of the oxide layer estimated by XPS. The silver NPs are modelled

Nanoparticle interactions with live cells: Quantitative fluorescence microscopy of nanoparticle size effects

• Li Shang,
• Karin Nienhaus,
• Xiue Jiang,
• Linxiao Yang,
• Katharina Landfester,
• Volker Mailänder,
• Thomas Simmet and
• G. Ulrich Nienhaus

Beilstein J. Nanotechnol. 2014, 5, 2388–2397, doi:10.3762/bjnano.5.248

• clathrin-dependent pathways. In agreement with our results, other studies also showed that clathrin-dependent uptake plays an important role in the internalization of nanoparticles, e.g., silver NPs (diameter: 50 nm) [42] and polystyrene NPS (diameter: 40 nm) [43]. The presence of dynasore also reduced the

Localized surface plasmon resonances in nanostructures to enhance nonlinear vibrational spectroscopies: towards an astonishing molecular sensitivity

• Dan Lis and
• Francesca Cecchet

Beilstein J. Nanotechnol. 2014, 5, 2275–2292, doi:10.3762/bjnano.5.237

• nanoparticles directly into the liquid [79]. Although the phase matching condition was not fulfilled, the average particle spacing had been adjusted such as to be smaller than the coherence length, while the pump wavelength was matching the localized surface plasmon resonance of the silver NPs. In this first

The surface properties of nanoparticles determine the agglomeration state and the size of the particles under physiological conditions

• Christoph Bantz,
• Olga Koshkina,
• Thomas Lang,
• Hans-Joachim Galla,
• C. James Kirkpatrick,
• Roland H. Stauber and
• Michael Maskos

Beilstein J. Nanotechnol. 2014, 5, 1774–1786, doi:10.3762/bjnano.5.188

• hydrodynamic radius of 57 nm and 69 nm for the aggregate component. As these sizes are not superposed by the scattering signal of proteins, this observation gives evidence of a reduced diameter for the samples PEG@POS-NH2Q1 and PEG@POS-NH2Q2 in presence of proteins. For silver NPs, an additional sterical

Synthesis of embedded Au nanostructures by ion irradiation: influence of ion induced viscous flow and sputtering

• Udai B. Singh,
• D. C. Agarwal,
• S. A. Khan,
• S. Mohapatra,
• H. Amekura,
• D. P. Datta,
• Ajay Kumar,
• R. K. Choudhury,
• T. K. Chan,
• Thomas Osipowicz and
• D. K. Avasthi

Beilstein J. Nanotechnol. 2014, 5, 105–110, doi:10.3762/bjnano.5.10

• this problem. Stepanov et al. [22] have shown that the implantation of 60 keV Ag ions with fluences of (2–4) × 1016 ions/cm2 leads to the formation of silver NPs in glass near room temperature. It has been shown that Au atoms get buried [10] during the ion beam irradiation of thin films. Ion beam