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Search for "nanospheres" in Full Text gives 135 result(s) in Beilstein Journal of Nanotechnology.

Silver-decorated gel-shell nanobeads: physicochemical characterization and evaluation of antibacterial properties

  • Marta Bartel,
  • Katarzyna Markowska,
  • Marcin Strawski,
  • Krystyna Wolska and
  • Maciej Mazur

Beilstein J. Nanotechnol. 2020, 11, 620–630, doi:10.3762/bjnano.11.49

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  • -incorporated silver nanoparticles. Results and Discussion Preparation and physicochemical characterization of silver-decorated gel-shell nanobeads The preparation of sulfonated polystyrene beads with embedded silver nanoparticles (PSSAg) is schematically shown in Figure 1. First, polystyrene nanospheres are
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Published 14 Apr 2020

Label-free highly sensitive probe detection with novel hierarchical SERS substrates fabricated by nanoindentation and chemical reaction methods

  • Jingran Zhang,
  • Tianqi Jia,
  • Yongda Yan,
  • Li Wang,
  • Peng Miao,
  • Yimin Han,
  • Xinming Zhang,
  • Guangfeng Shi,
  • Yanquan Geng,
  • Zhankun Weng,
  • Daniel Laipple and
  • Zuobin Wang

Beilstein J. Nanotechnol. 2019, 10, 2483–2496, doi:10.3762/bjnano.10.239

Graphical Abstract
  • ], nanostars [17][18], nanoantennas [19], and nanospheres [20]; these have been successfully machined by existing lithography-based technologies. Furthermore, hierarchical substrates have also been fabricated by a combination of lithography [21][22][23][24][25] and self-assembly. Matricardi et al. [21] used
  • the template-assisted assembly of gold nanospheres with patterned PDMS molds featuring square array geometries with lattice parameters of 400 to 1600 nm and hole diameters of 230 to 960 nm. Then 4-acetamidothiophenol at 10−4 mol/L was detected using this substrate. Domenici et al. [22] used electron
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Published 13 Dec 2019

Nonlinear absorption and scattering of a single plasmonic nanostructure characterized by x-scan technique

  • Tushar C. Jagadale,
  • Dhanya S. Murali and
  • Shi-Wei Chu

Beilstein J. Nanotechnol. 2019, 10, 2182–2191, doi:10.3762/bjnano.10.211

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  • reasonable. Sample preparation As samples, we used 80 nm diameter gold nanospheres commercially available from BBI Solutions, UK. Before use, the nanostructure solution was sonicated for 2 min to avoid particle aggregation. Then, one drop of the solution was placed on polysine slides (Thermo Fisher
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Published 06 Nov 2019

Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria

  • Carol López de Dicastillo,
  • Cristian Patiño,
  • María José Galotto,
  • Yesseny Vásquez-Martínez,
  • Claudia Torrent,
  • Daniela Alburquenque,
  • Alejandro Pereira and
  • Juan Escrig

Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167

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  • this work, novel, hollow, calcined titanium dioxide nanospheres (CSTiO2) were successfully synthesized for the first time through the combination of electrospinning and atomic layer deposition techniques. Poly(vinylpyrrolidone) (PVP) electrosprayed spherical particles were double-coated with alumina
  • and titanium dioxide, and after a calcination process, hollow nanospheres were obtained with a radius of approximately 345 nm and shell thickness of 17 nm. The structural characterization was performed using electron microscopy, and X-ray diffraction and small-angle X-ray diffraction evidenced an
  • anatase titanium dioxide crystalline structure. Thermogravimetric analysis and Fourier-transform infrared spectroscopy studies demonstrated the absence of polymer residue after the calcination process. The antimicrobial properties of the developed CSTiO2 hollow nanospheres were evaluated against different
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Published 19 Aug 2019

Revisiting semicontinuous silver films as surface-enhanced Raman spectroscopy substrates

  • Malwina Liszewska,
  • Bogusław Budner,
  • Małgorzata Norek,
  • Bartłomiej J. Jankiewicz and
  • Piotr Nyga

Beilstein J. Nanotechnol. 2019, 10, 1048–1055, doi:10.3762/bjnano.10.105

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  • . Chemical methods allow for fabrication, in solution or on surfaces, of nanostructures of various shapes including: nanospheres [5], spheres coated with a thin dielectric shell [10], dielectric core-metallic shell particles [11][12], nanostars [13], microflowers [14] and aggregates [15], just to mention a
  • -structured surfaces made of glass [25][26], GaN [27][28][29], Si [30], TiO2 [31], Al2O3 [32], Ti [33], polymers [34], or planar surfaces coated with nano/microspheres resulting in metal film on nanospheres MFON [35][36], and Au nanocrescents on a monolayer of polystyrene nanospheres [37]. Additionally
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Published 15 May 2019
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  • -selected nanospheres. Conclusion In this study, the performance of SERS labels based on Au NPs and organic dyes resonant at 633 nm was investigated by a combination of Raman and TEM analysis. The AuNTs were designed in order to support multiple electromagnetic hot spots for any polarization direction of
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Published 10 May 2019

Serum type and concentration both affect the protein-corona composition of PLGA nanoparticles

  • Katrin Partikel,
  • Robin Korte,
  • Dennis Mulac,
  • Hans-Ulrich Humpf and
  • Klaus Langer

Beilstein J. Nanotechnol. 2019, 10, 1002–1015, doi:10.3762/bjnano.10.101

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  • blood clearance mechanisms of nanospheres [34]. However, one has to keep in mind that this is probably not the sole mechanism of elimination. For instance, Hu and co-workers supposed that adsorption of platelet factor 4 also promotes rapid clearance from the bloodstream (Table S2, Supporting Information
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Published 06 May 2019

Self-assembly and wetting properties of gold nanorod–CTAB molecules on HOPG

  • Imtiaz Ahmad,
  • Floor Derkink,
  • Tim Boulogne,
  • Pantelis Bampoulis,
  • Harold J. W. Zandvliet,
  • Hidayat Ullah Khan,
  • Rahim Jan and
  • E. Stefan Kooij

Beilstein J. Nanotechnol. 2019, 10, 696–705, doi:10.3762/bjnano.10.69

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  • for 10 min to reduce (1.0 mM to ≈0.4 mM) the excess CTAB concentration. Similarly, the same solution was centrifuged again at 5600 rpm for 5 min to separate nanospheres from nanorods. The supernatant, consisting mostly of nanorods, was carefully separated from nanospheres stuck at the bottom of the
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Published 13 Mar 2019

Electromagnetic analysis of the lasing thresholds of hybrid plasmon modes of a silver tube nanolaser with active core and active shell

  • Denys M. Natarov,
  • Trevor M. Benson and
  • Alexander I. Nosich

Beilstein J. Nanotechnol. 2019, 10, 294–304, doi:10.3762/bjnano.10.28

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  • of ways. After initial theorizing in the mid-2000s, this has led to the experimental demonstration of the smallest plasmonic laser in a random solution of colloidal gold nanospheres enveloped with dye-doped silica shells [3]. Today, plasmonic nanolasers attract great attention in research. A number
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Published 28 Jan 2019

Targeting strategies for improving the efficacy of nanomedicine in oncology

  • Gonzalo Villaverde and
  • Alejandro Baeza

Beilstein J. Nanotechnol. 2019, 10, 168–181, doi:10.3762/bjnano.10.16

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  • specifically designed for binding to the epidermal growth factor receptors (EGFR) have been anchored on the surface of hollow gold nanospheres [39]. The thiolated version of these aptamers was anchored on the gold surface through the thiol groups producing an average anchorage yield of 250 aptamers per
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Published 14 Jan 2019

Colloidal chemistry with patchy silica nanoparticles

  • Pierre-Etienne Rouet,
  • Cyril Chomette,
  • Laurent Adumeau,
  • Etienne Duguet and
  • Serge Ravaine

Beilstein J. Nanotechnol. 2018, 9, 2989–2998, doi:10.3762/bjnano.9.278

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  • report a new route to synthesize clusters, or so-called colloidal molecules (CMs), which mimic the symmetry of molecular structures made of one central atom. We couple site-specifically functionalized patchy nanoparticles, i.e., valence-endowed colloidal atoms (CAs), with complementary nanospheres
  • , i.e., well-calibrated silica nanospheres or core–shell nanoparticles, were obtained according to a seeded-growth protocol [22] and a method using methoxy poly(ethylene glycol)-thiol as a coupling agent [23], respectively. Their surface functionalization with carboxylic acid groups was performed by a
  • deactivation of the anhydride groups by hydrolysis. With our collection of dimpled particles and satellites, we can build colloidal assemblies that mimic both the chemistry and the geometry of molecules. We first performed a series of experiments by mixing 100 nm carboxylated silica nanospheres with particles
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Published 06 Dec 2018

Graphene-enhanced metal oxide gas sensors at room temperature: a review

  • Dongjin Sun,
  • Yifan Luo,
  • Marc Debliquy and
  • Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

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  • as a gas sensor because of its small bandgap (2.585 eV) and its physical and chemical stability [88][89]. In an early work, Jie et al. [90] reported that a NO2 sensor based on WO3 nanospheres wrapped in graphene sheets, prepared by a simple sol–gel technique, showed a linear response to low
  • concentrations of NO2, while the pure WO3 and graphene sensors did not respond to NO2 at room temperature. The authors claimed that the reason for room-temperature sensing of the composite sensor was the effective charge transfer between graphene and WO3 nanospheres by chemical bonds. The research group
  • confirmed that there existed C–O–W chemical bonds between WO3 and graphene by Raman and XPS measurements. The proposed sensing mechanism is shown in Figure 5. When exposed to oxygen or NO2 molecules, the gas molecules adsorbed on WO3 nanospheres cause the energy band to bend upward via obtaining electrons
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Published 09 Nov 2018

Silencing the second harmonic generation from plasmonic nanodimers: A comprehensive discussion

  • Jérémy Butet,
  • Gabriel D. Bernasconi and
  • Olivier J. F. Martin

Beilstein J. Nanotechnol. 2018, 9, 2674–2683, doi:10.3762/bjnano.9.250

Graphical Abstract
  • from chemically synthetized plasmonic nanospheres in solution, revealing an interesting competition between the centrosymmetry breaking induced by the field variation and the nanoparticle shape [35][37][38][39]. To investigate this issue [40], the meshes describing the nanodimers have been modified as
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Published 15 Oct 2018

Enhancement of X-ray emission from nanocolloidal gold suspensions under double-pulse excitation

  • Wei-Hung Hsu,
  • Frances Camille P. Masim,
  • Armandas Balčytis,
  • Hsin-Hui Huang,
  • Tetsu Yonezawa,
  • Aleksandr A. Kuchmizhak,
  • Saulius Juodkazis and
  • Koji Hatanaka

Beilstein J. Nanotechnol. 2018, 9, 2609–2617, doi:10.3762/bjnano.9.242

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  • most intense generation of hard X-rays. Experimental Colloidal suspensions of gold nanospheres were prepared via kinetically controlled seeded-growth synthesis of citrate-stabilized nanoparticles [32][33][34]. In a 250 mL three-necked round-bottomed flask, 2.2 mM sodium citrate in deionized water (>18
  • solution, the temperature was cooled down to 90 °C and the seeded growth of gold nanospheres was carried out. 1 mL of HAuCl4(aq) solution (25 mM) was injected in the reaction vessel. The reaction was finished after 30 min and the process was repeated twice. The sample was diluted by extracting 55 mL of the
  • an aperture of 2 mm. The orientation of the E1 polarization is shown for reference. X-ray intensities from (a) a water film and (b) a film of a colloidal suspension of gold nanospheres irradiated by a pre-pulse at 80 μJ/pulse and a main pulse at 700 μJ/pulse with different time delays. The automatic
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Published 01 Oct 2018

Hydrothermal-derived carbon as a stabilizing matrix for improved cycling performance of silicon-based anodes for lithium-ion full cells

  • Mirco Ruttert,
  • Florian Holtstiege,
  • Jessica Hüsker,
  • Markus Börner,
  • Martin Winter and
  • Tobias Placke

Beilstein J. Nanotechnol. 2018, 9, 2381–2395, doi:10.3762/bjnano.9.223

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  • nanospheres was also reported by Xia et al. [62] during the synthesis of carbon spheres containing electrocatalysts for oxygen reduction reactions. Heckmann et al. [63] investigated the use of high-temperature-treated hydrothermal carbon spheres as cathode materials for dual-ion cells and found spherical
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Published 05 Sep 2018

Closed polymer containers based on phenylboronic esters of resorcinarenes

  • Tatiana Yu. Sergeeva,
  • Rezeda K. Mukhitova,
  • Irek R. Nizameev,
  • Marsil K. Kadirov,
  • Polina D. Klypina,
  • Albina Y. Ziganshina and
  • Alexander I. Konovalov

Beilstein J. Nanotechnol. 2018, 9, 1594–1601, doi:10.3762/bjnano.9.151

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  • National Research Technical University, K. Marx str. 10, Kazan 420111, Russia A. M. Butlerov Institute of Chemistry, Kazan Federal University, Kremlevskaya str. 18, Kazan 420008, Russia 10.3762/bjnano.9.151 Abstract Novel polymer nanospheres (p(SRA-B)) were prepared by cross-linking a sulfonated
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Published 29 May 2018

Interaction-tailored organization of large-area colloidal assemblies

  • Silvia Rizzato,
  • Elisabetta Primiceri,
  • Anna Grazia Monteduro,
  • Adriano Colombelli,
  • Angelo Leo,
  • Maria Grazia Manera,
  • Roberto Rella and
  • Giuseppe Maruccio

Beilstein J. Nanotechnol. 2018, 9, 1582–1593, doi:10.3762/bjnano.9.150

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  • thick metal layers (gold films deposited by thermal evaporation and cobalt films deposited by magnetron sputtering) and successively removing the metal-capped spherical, nanoscale materials (termed “nanospheres” throughout the remainder of this article) by careful tape stripping with carbon tape in
  • . Successively, reactive ion etching was used to selectively remove the portion of the gold film not protected by the nanospheres. The etch rate (2.9 nm/min) was estimated measuring the thickness of the gold film for different etching times. Finally, the nanosphere residues were removed by oxygen plasma
  • adhesion between the particles and the substrate. Instead, in the case of functionalized substrates, the electrostatic interactions between negatively charged polystyrene nanospheres and a positively charged surface allowed the formation of relatively ordered colloid patterns extended over a centimeter
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Published 29 May 2018

Optical near-field mapping of plasmonic nanostructures prepared by nanosphere lithography

  • Gitanjali Kolhatkar,
  • Alexandre Merlen,
  • Jiawei Zhang,
  • Chahinez Dab,
  • Gregory Q. Wallace,
  • François Lagugné-Labarthet and
  • Andreas Ruediger

Beilstein J. Nanotechnol. 2018, 9, 1536–1543, doi:10.3762/bjnano.9.144

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  • nanospheres appears darker, while the apexes of the nanotriangles, corresponding to the hot spots, appear brighter. The features of the processed images can be extracted with a high spatial resolution confirming that we have a near-field image, as a diffraction limited image could not reach such a high
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Published 23 May 2018

Excitation of nonradiating magnetic anapole states with azimuthally polarized vector beams

  • Aristeidis G. Lamprianidis and
  • Andrey E. Miroshnichenko

Beilstein J. Nanotechnol. 2018, 9, 1478–1490, doi:10.3762/bjnano.9.139

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  • illuminated by such beams. We propose several configuration schemes where magnetic anapole modes of simple or hybrid nature can be detected in silicon nanospheres, nanodisks and nanopillars. Keywords: anapole excitation; dielectric nano-optics; multipolar expansion; T-matrix method; vector beams
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Published 17 May 2018

Cr(VI) remediation from aqueous environment through modified-TiO2-mediated photocatalytic reduction

  • Rashmi Acharya,
  • Brundabana Naik and
  • Kulamani Parida

Beilstein J. Nanotechnol. 2018, 9, 1448–1470, doi:10.3762/bjnano.9.137

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  • adsorption technique. Moreover, the combination of rGH with TiO2 nanospheres suppressed the recombination of photoinduced charges and facilitated the transport of photoelectrons for efficient photocatalytic reduction of Cr(VI) under irradiation with UV radiation. Thus, the fabricated photocatalyst exhibited
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Published 16 May 2018

Chemistry for electron-induced nanofabrication

  • Petra Swiderek,
  • Hubertus Marbach and
  • Cornelis W. Hagen

Beilstein J. Nanotechnol. 2018, 9, 1317–1320, doi:10.3762/bjnano.9.124

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  • precursor, thus highlighting the importance of the actual chemical nature of the substrate [31]. This Thematic Series is completed by publications on interesting applications of FEBID. This concerns the fabrication and characterization of magnetic cobalt nanospheres on cantilever tips for magnetic resonance
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Published 30 Apr 2018

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

  • Jaison Jeevanandam,
  • Ahmed Barhoum,
  • Yen S. Chan,
  • Alain Dufresne and
  • Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

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Published 03 Apr 2018

Bioinspired self-healing materials: lessons from nature

  • Joseph C. Cremaldi and
  • Bharat Bhushan

Beilstein J. Nanotechnol. 2018, 9, 907–935, doi:10.3762/bjnano.9.85

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Published 19 Mar 2018

Facile synthesis of a ZnO–BiOI p–n nano-heterojunction with excellent visible-light photocatalytic activity

  • Mengyuan Zhang,
  • Jiaqian Qin,
  • Pengfei Yu,
  • Bing Zhang,
  • Mingzhen Ma,
  • Xinyu Zhang and
  • Riping Liu

Beilstein J. Nanotechnol. 2018, 9, 789–800, doi:10.3762/bjnano.9.72

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  • BiOI nanolayers. As pure ZnO, sample B-6 (Figure 2c) presents nanospheres with a highly smooth surface, which is possibly caused by calcination [38]. In order to make further investigations on the ZnO/BiOI heterostructure, TEM and HRTEM analysis were applied. Figure S2a, Supporting Information File 1
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Published 05 Mar 2018

Cyclodextrin-assisted synthesis of tailored mesoporous silica nanoparticles

  • Fuat Topuz and
  • Tamer Uyar

Beilstein J. Nanotechnol. 2018, 9, 693–703, doi:10.3762/bjnano.9.64

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  • a highly challenging task to date. MSNs are commonly synthesized by surfactant-templated sol–gel reactions [12][13]. In this regard, mesoporous silica nanospheres are the most commonly used form of silica particles that are produced using a pore templating agent, such as cetyltrimethylammonium
  • was increased from 0.10 to 0.60% (w/v). MSNs were also synthesized at low CTAC content (0.2% (w/v)) and two different β-CD concentrations (0.75 and 1.5% (w/v)). Figure 7 displays the TEM and STEM images of the respective particles, where inter-linked silica nanospheres were generated at a β-CD content
  • constant β-CD concentration of 1% (w/v). Figure 8 shows the SEM images of the respective particles. At low CTAC concentration (0.10% (w/v)), the formation of large connected particles was observed with a mean particle size of 1500 nm. With an increased CTAC concentration of 0.40% (w/v), silica nanospheres
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Published 22 Feb 2018
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