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Search for "metal nanoparticles" in Full Text gives 204 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Current state of laser synthesis of metal and alloy nanoparticles as ligand-free reference materials for nano-toxicological assays
Beilstein J. Nanotechnol. 2014, 5, 1523–1541, doi:10.3762/bjnano.5.165
- a defined surface area, inhibiting further growth and coalescence (Figure 5B) [81]. Next to gold nanoparticles, size control of less noble metal nanoparticles like silver or AuAg alloys may also be relevant for toxicological assays, as particle size, which goes along with changes in curvature and
Protein-coated pH-responsive gold nanoparticles: Microwave-assisted synthesis and surface charge-dependent anticancer activity
Beilstein J. Nanotechnol. 2014, 5, 1452–1462, doi:10.3762/bjnano.5.158
- lower costs and minimal side effects [24]. Because of their biocompatibility, noble metal nanoparticles, particularly AuNPs, are more preferable in various biomedical applications, including highly sensitive diagnostic assays [25], thermal ablation, radiotherapy enhancement [26][27][28], as well as for
Microstructural and plasmonic modifications in Ag–TiO2 and Au–TiO2 nanocomposites through ion beam irradiation
Beilstein J. Nanotechnol. 2014, 5, 1419–1431, doi:10.3762/bjnano.5.154
- ion beam induced growth of nanoparticles and structural modifications in the titania matrix. Keywords: noble metal–titania nanocomposite; surface plasmon resonance; swift heavy ions; Introduction Metal nanoparticles embedded in dielectric matrices in the form of nanocomposites have gained
- utilized to fabricate different multifunctional nanocomposites for different applications [7][8][9]. Generally, the main motivation behind the use of an insulating matrix is to maintain the necessary separation between metal nanoparticles (resulting from differences in surface energy of the individual
- semiconducting matrices, such as SnO2 [10], ZnO [11] and CdS [12] for the embedding of noble metal nanoparticles has shown great potential. Thin films and nanostructures of TiO2 are probably one of the most investigated systems for different applications, such as memristors, dye-sensitized solar cells
Synthesis, characterization, and growth simulations of Cu–Pt bimetallic nanoclusters
Beilstein J. Nanotechnol. 2014, 5, 1371–1379, doi:10.3762/bjnano.5.150
- Institutes of Health The authors would like to acknowledge to the NSF for support with grants DMR-1103730, “Alloys at the Nanoscale: The Case of Nanoparticles Second Phase and PREM: NSF PREM Grant # DMR 0934218; “Oxide and Metal Nanoparticles- The Interface Between Life Sciences and Physical Sciences”. In
Review of nanostructured devices for thermoelectric applications
Beilstein J. Nanotechnol. 2014, 5, 1268–1284, doi:10.3762/bjnano.5.141
- the initial film thickness and RTA time and temperature [131]. Metal nanoparticles on silicon, suitable for MaCE production of SiNWs, can be also obtained by sinking silicon in an aqueous solution of HF and metal salts, such as AgNO3 [132][133][134][135], for a very short time (galvanic displacement
Effects of palladium on the optical and hydrogen sensing characteristics of Pd-doped ZnO nanoparticles
Beilstein J. Nanotechnol. 2014, 5, 1261–1267, doi:10.3762/bjnano.5.140
- controls the gas sensing characteristics, have been reported in ZnO films [23]. The sensitivity and selectivity characteristics of the gas sensor are associated with the deep hole-trap states and vacancies on the ZnO surface by the electron transfer mechanism [23][24]. The Pd metal nanoparticles modify the
Purification of ethanol for highly sensitive self-assembly experiments
Beilstein J. Nanotechnol. 2014, 5, 1254–1260, doi:10.3762/bjnano.5.139
- noble metal nanoparticles onto porous substrates, the most popular being the adsorption and decomposition of a precursor material, such as a salt of the respective noble metal. This technique is widely used to produce catalysts in industry [37]. We decided to use the most common gold compound
Enhanced photocatalytic hydrogen evolution by combining water soluble graphene with cobalt salts
Beilstein J. Nanotechnol. 2014, 5, 1167–1174, doi:10.3762/bjnano.5.128
- -SO3 avoids the aggregation of the catalyst to some extent. These results are consistent with the better performance and the higher hydrogen evolution from the system with G-SO3. As mentioned above, the TEM results showed that cobalt metal nanoparticles may form during the process in both cases. XPS
- , corresponding to the Co 2p orbital (Supporting Information File 1, Figure S3). The cobalt lines in the spectra, however, were assigned to cobalt(II) [65], not to cobalt(0). This is different from the TEM results and in contrast to the grown cobalt metal nanoparticles on graphene [66]. ICP-MS measurements were
Nanodiamond-DGEA peptide conjugates for enhanced delivery of doxorubicin to prostate cancer
Beilstein J. Nanotechnol. 2014, 5, 937–945, doi:10.3762/bjnano.5.107
- tumor types [6][7][8][9]. Currently, there are several clinically approved nanoparticle-based cancer drugs using liposomes, nanoparticle albumin-bound (nab) technology, dendrimers, polymeric, carbon, and metal nanoparticles [6][8]. Gold nanorods, iron magnetic nanoparticles, polymer nanospheres, lipids
Gas sensing with gold-decorated vertically aligned carbon nanotubes
Beilstein J. Nanotechnol. 2014, 5, 910–918, doi:10.3762/bjnano.5.104
- , regardless of the nanotube length. Keywords: alignment; carbon nanotubes; decoration; gas sensors; metal nanoparticles; thermal CVD; Introduction The interest in gas sensing for reaching a widespread, continuous pollution detection and control has been growing steadily in the last decades due to the
- )-functionalized multi-walled nanotubes randomly arranged was significantly improved for NO2 gas detection [15]. Later, VA-CNTs produced by PECVD were functionalized with nominally 5 nm-thick metal nanoparticles by magnetron sputtering, providing a higher sensitivity to NO2 [16]. Based on these reported results
Resonance of graphene nanoribbons doped with nitrogen and boron: a molecular dynamics study
Beilstein J. Nanotechnol. 2014, 5, 717–725, doi:10.3762/bjnano.5.84
- synthesised through chemical functionalization with hydroxy and methyl groups or hydrogen [10], the decoration with quantum dots [11], noble metal nanoparticles (NPs) [12], or complex biomolecular structures [13][14]. A number of works have been conducted to investigate the properties of graphene derivatives
Nanostructure sensitization of transition metal oxides for visible-light photocatalysis
Beilstein J. Nanotechnol. 2014, 5, 696–710, doi:10.3762/bjnano.5.82
- photosensitization of semiconductors for potential applications in solar cells and photocatalysis. Another interesting phenomenon related to plasmonic metal nanoparticles is that the metal themselve may also be used as a photocatalyst for photo-oxidation or even water splitting. Carbon nanostructure as the
Enhanced photocatalytic activity of Ag–ZnO hybrid plasmonic nanostructures prepared by a facile wet chemical method
Beilstein J. Nanotechnol. 2014, 5, 639–650, doi:10.3762/bjnano.5.75
- made to improve the photocatalytic efficiency of ZnO by decreasing the rate of recombination of electrons and holes by surface modification with noble metal nanoparticles [19][20][21][22][23][24]. Surface modification of ZnO nanostructures with noble metal nanoparticles improves the photocatalytic
- of their recombination rate [19]. Secondly, noble metal nanoparticles on ZnO exhibit localized surface plasmon resonance (LSPR) absorption of light which can have significant impact on semiconductor photocatalysis. The LSPR wavelength of noble metal nanoparticles can be tuned from near UV to the
- visible region by controlling their size, shape, inter-particle spacing and surrounding medium [25]. In case of ZnO modified with noble metal nanoparticles, LSPR absorption can lead to enhanced utilization of UV–visible light as compared to pure ZnO [26][27][28]. Silver nanoparticles decorated ZnO
High activity of Ag-doped Cd0.1Zn0.9S photocatalyst prepared by the hydrothermal method for hydrogen production under visible-light irradiation
Beilstein J. Nanotechnol. 2014, 5, 587–595, doi:10.3762/bjnano.5.69
- that the added Ag was not completely doped in the Cd0.1Zn0.9S. The addition of Ag also caused a new absorption appearing at about 295 nm for Ag(0.01)-doped Cd0.1Zn0.9S and Ag(0.03)-doped Cd0.1Zn0.9S (Figure 5b,c), corresponding to the presence of Ag metal nanoparticles [25] that can be formed
One pot synthesis of silver nanoparticles using a cyclodextrin containing polymer as reductant and stabilizer
Beilstein J. Nanotechnol. 2014, 5, 380–385, doi:10.3762/bjnano.5.44
- range of applications including optics, catalysis and biomedical science [1][2][3][4]. Many strategies have been established in the formation of metal nanoparticles, for example chemical or electrochemical reduction, irradiation or thermal decomposoion [5][6][7][8]. Most of these methods require
- ][13]. In the synthesis of metal nanoparticles the use of polymers as external steric or electrosteric stabilizer is an established method to control the particle growth, limit oxidation and stabilize the nanoparticle dispersion [5][14][15][16]. However, there are only a few examples for polymers
- result of surface plasmon resonance of noble metal nanoparticles [22]. UV–vis absorption spectroscopy is an established method to characterize the formation of silver nanoparticles and their shape [23]. Figure 2 shows the UV–vis absorption spectra of the metallopolymer solution 2a. The spectra exhibit
En route to controlled catalytic CVD synthesis of densely packed and vertically aligned nitrogen-doped carbon nanotube arrays
Beilstein J. Nanotechnol. 2014, 5, 219–233, doi:10.3762/bjnano.5.24
- reported. The field emission characteristics of N-CNTs have also been demonstrated to be superior to that of pristine CNTs [12]. Moreover, N-CNTs emerged as material of an improved capability to anchor metal nanoparticles through nitrogen coupling [13][14] and to form catalytically active centres, e.g
- have iron particles encapsulated inside the core, the channels of the N-CNTs were free from metal nanoparticles suggesting that, for instance, a partial removal of the catalyst residues could occur while removing N-CNTs from the quartz surface. Representative TEM images of N-CNTs from Synthesis VIII
Synthesis of embedded Au nanostructures by ion irradiation: influence of ion induced viscous flow and sputtering
Beilstein J. Nanotechnol. 2014, 5, 105–110, doi:10.3762/bjnano.5.10
- Au nanoparticles into the glass substrate. Keywords: embedded nanoparticles; ion beam irradiation; recoil implantation; Introduction Noble-metal nanoparticles (NPs) are of great interest due to their large surface-to-volume ratio and their enhanced absorption of visible light. The shape- and size
Dye-doped spheres with plasmonic semi-shells: Lasing modes and scattering at realistic gain levels
Beilstein J. Nanotechnol. 2013, 4, 974–987, doi:10.3762/bjnano.4.110
- ; spaser; Introduction Noble metal nanoparticles are of current interest both in fundamental and applied science because of their localized plasmonic resonances (LPR) in the visible and near infrared range of the optical spectrum. The simplest nanoparticle geometry is spherical, but the spectral position
Influence of particle size and fluorination ratio of CFx precursor compounds on the electrochemical performance of C–FeF2 nanocomposites for reversible lithium storage
Beilstein J. Nanotechnol. 2013, 4, 705–713, doi:10.3762/bjnano.4.80
- metal nanoparticles encapsulated in layers of graphitic carbon were formed. The agglomerates are interlinked by multiwall carbon nanotubes which are formed in situ [34][35][36]. Although these systems enhanced the cycling stability of the conversion reaction greatly because of the tight embedding of
Guided immobilisation of single gold nanoparticles by chemical electron beam lithography
Beilstein J. Nanotechnol. 2013, 4, 336–344, doi:10.3762/bjnano.4.39
- Patrick A. Schaal Ulrich Simon Institute of Inorganic Chemistry and JARA – Fundamentals of Future Information Technology, RWTH Aachen University, Landoltweg 1, D-52056 Aachen, Germany 10.3762/bjnano.4.39 Abstract The fabrication of periodic arrays of single metal nanoparticles is of great current
- order to overcome this threshold and to facilitate the processing, alternative approaches have been developed, which utilise the self-assembly capabilities of chemically tailored metal nanoparticles. Amongst others, Enderle et al. demonstrated very recently the formation of gold nanodots by self
High-resolution electrical and chemical characterization of nm-scale organic and inorganic devices
Beilstein J. Nanotechnol. 2013, 4, 318–319, doi:10.3762/bjnano.4.35
- convertors based on metal nanoparticles with a dye to shift the wavelengths. Improving the lifetime of organic solar cells requires incorporating optically transparent inorganic barriers in between the polymer films to prevent moisture penetration. Unfortunately, these organic systems represent an even more
Plasmonic oligomers in cylindrical vector light beams
Beilstein J. Nanotechnol. 2013, 4, 57–65, doi:10.3762/bjnano.4.6
- , a project which has, to the best of our knowledge, not been attempted so far. Keywords: near-field microscopy; oligomers; plasmons; radial and azimuthal polarization; Introduction Plasmonics is the optics of metal nanoparticles. If an external light field impinges on a metal nanoparticle
- developed an alternative route, which proved to be highly fruitful, cf. Figure 2. By replacing the closed metal-rings of the SRRs by individual but strongly coupled metal nanoparticles, we were able to retain a number of the described properties of the SRRs and yet drastically blue-shift the resonant
Characterization and properties of micro- and nanowires of controlled size, composition, and geometry fabricated by electrodeposition and ion-track technology
Beilstein J. Nanotechnol. 2012, 3, 860–883, doi:10.3762/bjnano.3.97
The morphology of silver nanoparticles prepared by enzyme-induced reduction
Beilstein J. Nanotechnol. 2012, 3, 404–414, doi:10.3762/bjnano.3.47
- silver nanoparticles are shown as an exemplary application for quantitative analysis. Keywords: EGNP; enzymatically grown silver nanoparticles; enzyme-induced deposition; nanoflower; SERS; Introduction The application of metal nanoparticles in the field of bioanalytics extends the possibilities of
- biomolecular detection significantly and may satisfy the ever-growing interest in ultrasensitive detection methods for different applications [1]. Due to their interesting and unique properties, metal nanoparticles have the potential to meet the requirements for different biomolecular investigations based on
- optical, electrical, electrochemical, or gravimetric detection schemes [2][3][4]. Concerning their optical properties, metal nanoparticles are characterized by high extinction coefficients as well as large scattering cross sections, making them prospective candidates for optical approaches based on
Approaches to nanostructure control and functionalizations of polymer@silica hybrid nanograss generated by biomimetic silica mineralization on a self-assembled polyamine layer
Beilstein J. Nanotechnol. 2011, 2, 760–773, doi:10.3762/bjnano.2.84
- typical diameter of 1–3 nm (Figure 8d) and a well-resolved crystalline lattice (Figure 8c inset). Therefore, similar to LPEI@silica powder materials [28][43], nanograsses on substrate surfaces also show the ability to serve as nanoreactors for the generation of metal nanoparticles, leading to a facile
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