Search results
Search for "decoration" in Full Text gives 71 result(s) in Beilstein Journal of Nanotechnology.
Features and advantages of flexible silicon nanowires for SERS applications
Beilstein J. Nanotechnol. 2019, 10, 725–734, doi:10.3762/bjnano.10.72
- vacuum for one hour at temperatures from 480–560 °C was performed. In the VLS process, 26% SiH4 diluted in Ar with 270 sccm flow rate was deposited for 1 h. In each experiment, the annealing temperature was the same as the VLS process temperature. The Ag nanoparticle decoration of the horizontal SiNWs
- [35]). The influence of the capillary forces will be discussed in the following sections. Ag decoration and morphology of Si nanowires and immersion-induced changes Using 500 °C as the optimal VLS process temperature, we decorated SiNWs through Ag sputtering. The sputtering time varied from 3 to 30
Hydrophilicity and carbon chain length effects on the gas sensing properties of chemoresistive, self-assembled monolayer carbon nanotube sensors
Beilstein J. Nanotechnol. 2019, 10, 565–577, doi:10.3762/bjnano.10.58
- decoration of CNT sidewalls with Au nanoparticles, preventing their mobility and coalescence. The different thiols employed in this work were characterized by Raman spectroscopy (see Figure 2). A Peltier cell was used in order to keep samples at 4 °C and stabilize them, because unbound thiols present high
- CNTs with Au nanoparticles would lead to poor results [36]. Au is mobile on the surface of pristine CNTs, resulting in coalescence effects (uncontrolled size of particles and bad homogeneity in the decoration). Previous works have reported the benefits of employing oxygen-plasma-treated CNTs, which
- need to be subsequently decorated with Au nanoparticles. Oxygenated defects act as anchoring and nucleation sites. Therefore, high control in the decoration homogeneity and the size of Au nanoparticles (avoiding coalescence effects) have been reported in oxygen-plasma-treated CNTs [37]. Since
Ceria/polymer nanocontainers for high-performance encapsulation of fluorophores
Beilstein J. Nanotechnol. 2019, 10, 522–530, doi:10.3762/bjnano.10.53
- polyoxyethanyl α-tocopheryl sebacate [37] significantly reduces oxygen quenching. Last but not least, another possibility is to attach an oxygen scavenger (e.g., diphenylanthracene moieties) to the emissive dye itself [38]. Decoration of the molecular structure of cyanine dyes including a cyclodextrin complex
Targeting strategies for improving the efficacy of nanomedicine in oncology
Beilstein J. Nanotechnol. 2019, 10, 168–181, doi:10.3762/bjnano.10.16
- . This example reflects how the combination of two targeting agents works on three levels of vectorization, namely tissular, cellular and subcellular targeting. As mentioned above, there are unwanted interaction effects between two agents, especially in the case of random decoration. Janus systems have
Nanoporous water oxidation electrodes with a low loading of laser-deposited Ru/C exhibit enhanced corrosion stability
Beilstein J. Nanotechnol. 2019, 10, 157–167, doi:10.3762/bjnano.10.15
- wt % H3PO4; this step defines the pore length L. (b) Removal of the Al substrate and Al2O3 barrier layer with simultaneous pore widening. (c) Laser-induced Ru/C decoration of the nanoporous Al2O3 surface. The photograph of the nanostructured surface after laser coating exhibits five well-defined dark
Wet chemistry route for the decoration of carbon nanotubes with iron oxide nanoparticles for gas sensing
Beilstein J. Nanotechnol. 2019, 10, 105–118, doi:10.3762/bjnano.10.10
- a new, inexpensive approach based on wet chemistry. The effect of process parameters such as the solvent used, the amount of iron salt or the calcination time on the morphology, decoration density and nanocluster size were studied. With the proposed approach, the decoration density can be adjusted
- with iron oxide nanoparticles substantially ameliorated the response towards nitrogen dioxide. Keywords: benzene detection; doping; gas sensor; metal nanoparticle decoration; multiwalled carbon nanotubes; NO2 detection; room temperature gas sensing; surface modification; Introduction Carbon nanotubes
- improving their interaction with gas molecules. Sensitivity and selectivity can be tailored by selecting the type of metal oxide employed, the size of nanoparticles and the decoration density or loading [6][10][11]. Metal oxides have been extensively investigated for sensing a wide range of gases [12][13
High-throughput micro-nanostructuring by microdroplet inkjet printing
Beilstein J. Nanotechnol. 2018, 9, 2372–2380, doi:10.3762/bjnano.9.222
- -containing micelle solution (BCML in o-xylene) are plasma-etched and the decoration of the surface with gold nanoparticles is then finished. (A) Pattern of gold nanoparticles on the reference sample after spin coating of a 10 × 10 mm silicon wafer unit with a gold-containing micelle solution at 7000 rpm and
Fabrication of photothermally active poly(vinyl alcohol) films with gold nanostars for antibacterial applications
Beilstein J. Nanotechnol. 2018, 9, 2040–2048, doi:10.3762/bjnano.9.193
- decoration) have received particular attention [6][7]. Previously, it was shown that these GNSs are highly photothermally active under NIR irradiation in aqueous solution in the form of monolayers grafted on dry glass surfaces and when inkjet-printed on flexible substrates, demonstrating the ability to reach
A visible-light-controlled platform for prolonged drug release based on Ag-doped TiO2 nanotubes with a hydrophobic layer
Beilstein J. Nanotechnol. 2018, 9, 1793–1801, doi:10.3762/bjnano.9.170
- full XPS spectrum of Zn-Ag-TNTs, in which Zn, Ti, Ag and O elements are detected. These spectra suggest the successful decoration of Ag as well as loading of Zn. The presence of C may be attributed to the incorporation from the electrolyte and the organic contamination adsorbed from environment. Figure
- (Figure 5c) show hydrophilicity as well. Meanwhile, the CAs of modified TNTs increased slightly by 19° after decoration with Ag and then decreased by 16° due to the loading of the Zn2+-based drug. Furthermore, organic mutilayers with functional groups, including carboxylates or silanes [32], can be used
- air atmosphere to form anatase phase. Decoration with Ag nanoparticles Chemical reduction was applied to decorate the nanotubes with Ag nanoparticles (AgNPs). The annealed TNTs were soaked in 4 mL 200 mM AgNO3 for 50 min in darkness and then dipped in 6 mL 5 mM NaBH4 for another 50 min. The resulting
Surface-plasmon-enhanced ultraviolet emission of Au-decorated ZnO structures for gas sensing and photocatalytic devices
Beilstein J. Nanotechnol. 2018, 9, 771–779, doi:10.3762/bjnano.9.70
- material for the design of efficient catalytic devices. The NO2 sensing ability of as-deposited ZnO films was investigated with different gas concentrations at an optimized sensing temperature of 120 °C. Surface decoration of plasmonic Au nanoparticles provided an enhanced sensitivity (141 times) with
- time-resolved photoluminescence spectra, which in turn supported our study of the design of efficient NO2 sensing devices and photocatalytic decomposition of organic dyes. The surface decoration of plasmonic Au nanoparticles has been demonstrated as an effective way to enhance the sensitivity and
Fabrication of CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation
Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241
- can be expected to create other ceria-based composite oxide systems with various structures for a broad range of technical applications. Keywords: CeO2; CO oxidation; surface decoration; synergistic interaction; yolk–shell structure; Introduction As one of the most important rare-earth oxides, ceria
- transition-metal mixed-oxide nanostructures. Based on this synthesis method, other CeO2-based composite oxides with various nanostructures can be expected to be fabricated through the pre-formation of CeO2 or CeO2-based solid solution with different morphologies and the subsequent decoration of highly
- decoration of MOx onto the CeO2 surface and the strong synergistic interaction between MOx species and CeO2. For comparison, a commercial CeO2 material was measured under the same conditions for CO oxidation. Complete CO conversion was obtained at 367 and 221 °C over the naked and CuOx-decorated commercial
Methionine-mediated synthesis of magnetic nanoparticles and functionalization with gold quantum dots for theranostic applications
Beilstein J. Nanotechnol. 2017, 8, 1734–1741, doi:10.3762/bjnano.8.174
- be obtained by the creation of proper linkers between magnetic NP and fluorescent or drug probes. One of these linkers is gold, because it is chemically stable, nontoxic and capable to link various biomolecules. In this study, we present a way for a simple and reliable decoration the surface of
- spectroscopy, inductively coupled plasma mass spectroscopy (ICP-MS), and X-ray photoelectron spectroscopy (XPS) of as-formed CoFe2O4 NPs before and after decoration with gold QDs were applied. Keywords: functionalization; gold; magnetic nanoparticles; quantum dots; theranostics; Introduction In current
- –Au NPs. Deconvoluted X-ray photoelectron spectrum (XPS) of Au 4f. FTIR spectra of methionine (a, a′), methionine sulfoxide (b, b′), cobalt ferrite NPs stabilized with methionine (c, c′), and the same NPs after decoration with gold (d, d′) within the indicated wavenumbers. Elemental composition of
Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications
Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159
Comprehensive Raman study of epitaxial silicene-related phases on Ag(111)
Beilstein J. Nanotechnol. 2017, 8, 1357–1365, doi:10.3762/bjnano.8.137
- around 170 °C. At temperatures between 180 and 210 °C the Ag terraces start to show some decoration by locally ordered features developing from the Ag step edges into the terraces (not shown). Still, no long-range order is observed. For deposition temperatures of approximately 220 °C a very clear new
Gas sensing properties of MWCNT layers electrochemically decorated with Au and Pd nanoparticles
Beilstein J. Nanotechnol. 2017, 8, 592–603, doi:10.3762/bjnano.8.64
- experimental approach prevented damage to the MWCNTs and, on the other hand, contributed to reduce (and remove) residual gold ions [39], resulting in the MWCNT surface decoration by metal NPs. Specificallly, the measured open circuit potential was −300 mV versus the reference electrode and the applied
- decoration, in both cases. Oxygen is commonly present in MWCNTs synthesized by the CVD process and is mainly derived from the oxygen adsorbed on the surface, as well as from carbon oxidation events. In both hybrid systems, the atomic percentage of oxygen further increased at the MWCNT surface after metal
- decoration, probably due to the generation of defects during the metal functionalization [40][41]. However, although the total oxygen content in the MWCNT films increased upon metal inclusion, the oxygen/gold elemental ratio decreased, while the oxygen/palladium ratio remained constant. The chemical
Graphene functionalised by laser-ablated V2O5 for a highly sensitive NH3 sensor
Beilstein J. Nanotechnol. 2017, 8, 571–578, doi:10.3762/bjnano.8.61
- , No. 2 and 3). Thus, decoration of graphene with V2O5 lends the sensor some degree of selectivity, and good sensitivity with respect to the reducing pollutant NH3. The introduction of dopants and clusters of atoms into graphene strongly increases the interaction with adsorbing molecules, due to an
Nanostructured carbon materials decorated with organophosphorus moieties: synthesis and application
Beilstein J. Nanotechnol. 2017, 8, 485–493, doi:10.3762/bjnano.8.52
- with the graphitic surface to form an aziridine ring [10]. Finally, the use of the CuAAC reaction [11], between an azide group and a terminal alkyne, has revealed a practical synthetic approach for the decoration of CNMs with a variety of molecular moieties [12][13]. In this work, we present our
- 8 was more easily isolated by filtration and repeated washing for complete removal of the excess reagents while GPs-Nit-PO derivative 9 was recovered using cycles of centrifugation and re-dispersion of the carbon material in a 1:1 isopropyl ether-isopropanol solution. The decoration of the
- 11 and 12 (Scheme 3) [33]. The successful decoration of NMs 11 and 12 was confirmed by elemental analysis and IR spectroscopy (see Supporting Information File 1, Figures S9 and S10) and, finally, they were reacted with compound 3 to afford the functionalized compounds 13 and 14 (Scheme 3). The
Methods for preparing polymer-decorated single exchange-biased magnetic nanoparticles for application in flexible polymer-based films
Beilstein J. Nanotechnol. 2017, 8, 408–417, doi:10.3762/bjnano.8.43
- decoration of NPs by oleic acid followed by ligand exchange with the desired bromopropionyl ester groups. We then built various assemblies of NPs directly on a substrate or suspended in PMMA. Conclusion: The alternative two-step strategy leads to better dispersed polymer-decorated magnetic particles, and the
- consists of a direct grafting of bromopropionyl ester molecules ob the surface of ENPs that were previously recovered and redispersed in a suitable solvent. The second uses an “all in solution” process, based on a prior decoration of ENPs by oleic acid ligands, which were subsequently exchanged by the
Sensitive detection of hydrocarbon gases using electrochemically Pd-modified ZnO chemiresistors
Beilstein J. Nanotechnol. 2017, 8, 82–90, doi:10.3762/bjnano.8.9
- removal of chlorine ions in the liquid phase. Finally, a thermal treatment at 120 °C for 2 h allowed us to maintain hydroxyl (–OH) groups on the oxide surface in order to permit the attachment of Pd NPs during the electrochemical deposition process [45]. Electrochemical decoration of ZnO by Pd NPs Pd@ZnO
- components of the O 1s spectrum, O–Zn and O–C, remains unchanged after the surface functionalization. Therefore, the atomic ratio O–Zn/Zn (the percentage of oxygen bound to metal divided by the total metal percentage) remained stoichiometric, i.e. equal to 1, also after the metal decoration, as reported in
- Table 1. In Pd@ZnO, the presence of palladium confirmed the successful electrochemical decoration of ZnO nanostructures. The Pd 3d high-resolution XPS spectrum is reported in Figure 2. The signal is composed of two doublets. The first one, Pd 3d5/2, at 335.3 ± 0.1eV, was attributed to nanostructured
Facile fabrication of luminescent organic dots by thermolysis of citric acid in urea melt, and their use for cell staining and polyelectrolyte microcapsule labelling
Beilstein J. Nanotechnol. 2016, 7, 1905–1917, doi:10.3762/bjnano.7.182
- and cellular toxicity is possible simply by changing the processing parameters, e.g., the ratio of precursors or the duration of synthesis. We have succeeded in the decoration of polyelectrolyte microcapsules with O-dots synthesized in this way, the former being considered very attractive drug
- -polyelectrolyte deposition, decoration with O-dots and subsequent CaCO3-core decomposition. Left: Possible mechanism of O-dot formation. Right: Appearance of 0.01% O-dots colloidal solution under UV illumination. Supporting Information Supporting Information File 184: Additional pictures and experimental data
Photothermal effect of gold nanostar patterns inkjet-printed on coated paper substrates with different permeability
Beilstein J. Nanotechnol. 2016, 7, 1480–1485, doi:10.3762/bjnano.7.140
- the amphiphilic nature of the poly(ethylene glycol) chains [18]. PEG-SH decoration causes LSPR of GNS to red-shift by about 10 nm, because of the slight local increase in the refractive index related to thiols grafting on the gold surface [18]. GNS decorated with PEG-SH are stable even after repeated
Multiwalled carbon nanotube hybrids as MRI contrast agents
Beilstein J. Nanotechnol. 2016, 7, 1086–1103, doi:10.3762/bjnano.7.102
- review. We present an introduction to the MRI technique and to the mechanism of CA action followed by synthetic routes of MWCNT pretreatment with oxidizing agents and layer-by-layer decoration (LBL) with (non-)ionic electrolytes. Functionalization of super/paramagnetic nanoparticles and the resulting
- both (non-)covalent modifications leading to CA candidates (Figure 1, Figure 2 and Figure 3). One of the first reports of the application of a MWCNT as a CA, published by Richard in 2008, describes the non-covalent decoration of MWCNT with a classical gadolinium ligand – the DTPA derivative [16]. The
- groups and opens up many possibilities for further functionalization, decoration, substitution or direct coordination of metals and their compounds. Carboxylic, hydroxyl (both phenol and alkyl alcohol) and carbonyl groups are formed on the surface and edges of the oxidized nanotubes oMWCNT. These
Photocurrent generation in carbon nanotube/cubic-phase HfO2 nanoparticle hybrid nanocomposites
Beilstein J. Nanotechnol. 2016, 7, 1075–1085, doi:10.3762/bjnano.7.101
- conduction via the CNT. To date, numerous studies have been reported on the decoration of CNTs with metal oxides including TiO2 [7][8] and ZnO [9] for solar cell applications and SnO2 for gas sensors. Reports on the fabrication of an all carbon nanocomposite combining CNTs, graphene and carbon quantum dots
- nanoparticles in the process of CNT decoration. In fact, acid treatment creates defects (vacancies and holes in the side walls) on the CNT surfaces along with carboxyl groups in the case of carboxylic acid treatment [24]. The bond with these carboxyl groups is then created via hydroxyl groups present on the
- overview of Figure 1a, the nanoparticles seem to decorate only specific sites either singularly or in agglomerates. A higher magnification HAADF-STEM image in Figure 1b further reinforces the selective decoration of the HfO2 nanoparticles as several regions of the CNT are devoid of nanoparticles. An
Gold nanoparticles covalently assembled onto vesicle structures as possible biosensing platform
Beilstein J. Nanotechnol. 2016, 7, 655–663, doi:10.3762/bjnano.7.58
- be lost. In this way only the antigen–antibody complex would be broken and the sensor will be reusable. Although, the preparation of nanomaterials in aqueous and organic media has been extensively studied, to our knowledge, there are no studies concerning the surface decoration of vesicles by using
- studies performed on the surface decoration of vesicle structures with AuNPs formed in pure glycerol by using a photochemical process with two irradiation times (8 and 13 min). For that, firstly the AuNP synthesis and the vesicles preparation were carried out. After that the self-assembly of the AuNPs
Novel roles for well-known players: from tobacco mosaic virus pests to enzymatically active assemblies
Beilstein J. Nanotechnol. 2016, 7, 613–629, doi:10.3762/bjnano.7.54
- freedom for a dense decoration with [SA]-enzymes, and a spatial decoupling of the enzymes and the TMV scaffold. About 50% of the CPCys subunits could be decorated with biotin linkers, and virtually all thereof with enzymes (Figure 5B,C), resulting in complete coverage of the TMV sticks by more than a
- -directing RNA. After decoration with bioactive molecules, such arrays ensure stable interlinkage of technical surfaces and biological effector molecules. Adapted with permission from [54], copyright (2011) American Chemical Society. B: Engineered TMV-like particles coating the waveguide setup of an optical
Other Beilstein-Institut Open Science Activities
