Materials Literature
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Carbon nanotubes (CNTs) are among the most highly studied nanomaterials due to their unique (and intertwined) mechanical and electrical properties. Recent advances in fabrication have allowed devices to be fabricated that are capable of applying a twisting force to individual CNTs while measuring mechanical and electr…
In this work, we performed a systematic study on the photoluminescence and scattering spectra of individual gold nanostructures that were lithographically defined. We identify the role of plasmons in photoluminescence as modulating the energy transfer between excited electrons and emitted photons. By comparing photolu…
Nanosilver is most attractive for its bactericidal properties in modern textiles, food packaging, and biomedical applications. Concerns, however, about released Ag(+) ions during dispersion of nanosilver in liquids have limited its broad use. Here, nanosilver supported on nanostructured silica is made with closely con…
Fragment assembly using structural motifs excised from other solved proteins has shown to be an efficient method for ab initio protein-structure prediction. However, how to construct accurate fragments, how to derive optimal restraints from fragments, and what the best fragment length is are the basic issues yet to be…
ZnO nanostructures were synthesized by hydrothermal method using different molar ratios of cetyltrimethylammonium bromide (CTAB) and Sodium dodecyl sulfate (SDS) as structure directing agents. The effect of surfactants on the morphology of the ZnO crystals was investigated by field emission scanning electron microscop…
Surface-enhanced Raman scattering (SERS) is one of the most straightforward applications of the so-called nanoplasmonics. This powerful molecular spectroscopy technique is based on the enhancement of the inelastic scattering from molecules located near nanostructured metallic surfaces when these are illuminated and su…
PURPOSE: Modern imaging technologies such as CT, PET, SPECT, and MRI employ contrast agents to visualize the tumor microenvironment, providing information on malignancy and response to treatment. Currently, all clinical imaging agents require chemical labeling, i.e. with iodine (CT), radioisotopes (PET/SPECT), or para…
The increasing commercial production of engineered nanoparticles (ENPs) has led to concerns over the potential adverse impacts of these ENPs on biota in natural environments. Silver nanoparticles (AgNPs) are one of the most widely used ENPs and are expected to enter natural ecosystems. Here we examined the effects of…
Rigid, porous objects and surfactants serve as powerful templates for the formation of mesoporous and macroporous materials. When both types of template are combined in a single synthesis, materials with intricate architectures and hierarchical porosity can be obtained. In this tutorial review, we explain how to condu…
The cell is certainly one of the most complex and exciting systems in Nature that scientists are still trying to fully understand. Such a challenge pushes material scientists to seek to reproduce its perfection by building biomimetic materials with high-added value and previously unmatched properties. Thanks to their…
In this review, a brief survey is offered on the main nanotechnology synthetic approaches available to heterogeneous catalysis, and a few examples are provided of their usefulness for such applications. We start by discussing the use of colloidal, reverse micelle, and dendrimer chemistry in the production of active me…
Photovoltaic (PV) technologies for solar energy conversion represent promising routes to green and renewable energy generation. Despite relevant PV technologies being available for more than half a century, the production of solar energy remains costly, largely owing to low power conversion efficiencies of solar cells…
In this paper the analysis of upconversion luminescence dynamics in tellurite and germanate glasses doped with Ho<sup>3+</sup> and sensitized by Yb<sup>3+</sup> in 8:1 molar ratio was presented. Population of energy levels was calculated using Runge-Kutta method. The influence of pump power (976 nm) radiation on popul…
From a point of a signal-to-background ratio, phosphors are a key component of micro channel plate (MCP) based x-ray framing cameras. In an MCP based framing camera, x-ray signal is converted to electrons, gated, amplified, and converted back to optical signal on the phosphor. To operate x-ray framing cameras in a har…
A prediction tool, based on a kinetic theory of gas model, previously developed for the thermal properties prediction of ZnO bulk crystal and nanostructures is used in order to be compared with existing literature results. As thermal conductivity measurement for nanostructures are seldom, the aim is to understand the…
This paper reports on the structure, mechanical, and photocatalytic properties of titanium dioxide ( TiO 2 ) and tungsten oxide ( WO 3 ) films on a brass substrate. TiO 2 and WO 3 films have been successfully deposited on brass by a simple sol‐gel dip‐coating method and it has been shown that, while both films possess…
ZnO hexagonal bipods have been synthesized by a hydrothermal method using NaAOT as template. Co-doped ZnO bipods show obvious room temperature ferromagnetic behaviours. Phase composition, microstructure, and x-ray photoemission spectra analysis indicate that there is no Co cluster exsisting in the samples, and the fer…
Here, we present direct correlation of luminescence properties to the atomic structures of Sialon:Ce phosphors. Luminescence of β-Sialon is revealed attributed to the intergrowth of a unit layer of α-Sialon:Ce-type structure on β-grain surfaces. The dense doping at fault sites either on the surface of or inside the α-…
We report the observation of reentrant spin glass state in the bilayered manganite with nominal composition La4/3Sr5/3Mn2O7. The studied compound transforms from a high temperature paramagnetic phase with antiferromagnetic type short range magnetic correlation to a ferromagnetic phase upon cooling. On further cooling,…
Nanocrystalline silicon quantum dots (nc-Si QDs) with various sizes and various doping concentrations were fabricated by supplying different flow rates of silane (SiH 4 ) gas and phosphine (PH 3 ) gas, respectively, under very high frequency (VHF; 144 MHz) plasma. With an increase in the flow rate of SiH 4 gas, the me…