Browsing by Keywords "Nanostructured materials"
Now showing items 21-40 of 47
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Microstructural characterization of medical-grade stainless steel powders prepared by mechanical alloying and subsequent annealing
(Elsevier, 2013)The harmful effect of nickel ions released from conventional stainless steel implants has provided a high level of motivation for the further development of nickel-free stainless steels. In this paper, the microstructure ... -
Nanomechanics using an ultra-small amplitude AFM
(Cambridge University Press, 2001)A new type of AFM is presented which allows for direct measurements of nanomechanical properties in ultra-high vacuum and liquid environments. The AFM is also capable to atomic-scale imaging of force gradients. This is ... -
One-pot synthesis of CdS nanoparticles in the channels of mesosructured silica films and monoliths
(American Chemical Society, 2005)Cd(II)-modified mesoporous silica films and/or monoliths synthesized in one pot using a true liquid crystalline (TLC) approach have been reacted with H2S gas to produce CdS-modified mesostructured nanocomposite materials ... -
Oscillatory exchange coupling in magnetic molecules
(IOP Publishing, 2007)Recently, first-principles calculations based on the spin-dependent density functional theory (DFT) have revealed that the magnetic ground state of a finite linear carbon chain capped by two transition metal (TM) atoms ... -
Photonic devices and systems embedded with nanocyrstals
(SPIE, 2006)We review our research work on the development of photonic devices and systems embedded with nanocyrstals for new functionality within EU Phoremost Network of Excellence on nanophotonics. Here we report on CdSe/ZnS ... -
Probing nanoscale domains of J-Aggregates deposited on a mica surface
(American Chemical Society, 2004)J-aggregates of 1,1′,3,3′-tetraethyl-5,5′,6,6′- tetrachlorobenzimidazolocarbocyanine (TTBC) were deposited on a mica surface and probed by atomic force microscopy operated at tapping mode in air. Optical spectra showed ... -
Quantum effects in electrical and thermal transport through nanowires
(Institute of Physics Publishing, 2001)Nanowires, point contacts and metallic single-wall carbon nanotubes are one-dimensional nanostructures which display important size-dependent quantum effects. Quantization due to the transverse confinement and resultant ... -
Quantum efficiency enhancement in nanocrystals using nonradiative energy transfer with optimized donor-acceptor ratio for hybrid LEDs
(American Institute of Physics, 2009-06-17)The quantum efficiency enhancement in nanocrystal solids is critically important for their efficient use as luminophors on color-conversion light emitting diodes (LEDs). For this purpose, we investigate energy gradient ... -
Quantum transport through one-dimensional aluminum wires
(American Vacuum Society, 2002)Quantum conductance in narrow channels has been well understood by using the two-dimensional electron gas, a model system which has been realized in semiconductor heterojunctions. An essential property of this electron ... -
Self-assembled peptide nanofiber templated ALD growth of TiO2 and ZnO semiconductor nanonetworks
(Wiley - V C H Verlag GmbH & Co. KGaA, 2016)Here peptide amphiphile (PA) nanofiber network is exploited as a three‐dimensional soft template to construct anatase TiO2 and wurtzite ZnO nanonetworks. Atomic layer deposition (ALD) technique is used to coat the organic ... -
Self-assembled peptide nanostructures as a versatile tool for fabrication of nanostructured
(Bilkent University, 2015-01)Several peptides such as amyloid like peptides (ALPs) and peptide amphiphiles (PAs) were synthesized by solid phase peptide synthesis technique. These peptides were utilized in fabrication of nanostructured materials. ALPs ... -
Self-assembled peptide nanostructures for functional materials
(Institute of Physics Publishing, 2016)Nature is an important inspirational source for scientists, and presents complex and elegant examples of adaptive and intelligent systems created by self-assembly. Significant effort has been devoted to understanding these ... -
Solid or liquid? Solidification of a nanoconfined liquid under nonequilibrium conditions
(American Chemical Society, 2006)There has been a long-standing debate about the physical state and possible phase transformations of confined liquids. In this report, we show that a model-confined liquid can behave both as a Newtonian liquid with very ... -
Solventless acid-free synthesis of mesostructured titania: nanovessels for metal complexes and metal nanoclusters
(Wiley - V C H Verlag GmbH & Co. KGaA, 2003)A new and highly reproducible method to obtain mesostructured titania materials is introduced in this contribution. The meso-structured titania is obtained by employing self-assembled structures of non-ionic alkyl-poly(ethylene ... -
Strong interference in planar, multilayer perfect absorbers: achieving high-operational performances in visible and near-infrared regimes
(Institute of Electrical and Electronics Engineers Inc., 2019)Light-Matter Interactions at subwavelength-designed nanostructures have been the subject of intensive study in recent years. The realization of an ideal "blackbody" absorber is an emerging topic in nanophotonics and ... -
Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers
(American Institute of Physics, 2009-02-09)We proposed and demonstrated architectural tuning of color chromaticity by controlling photoluminescence decay kinetics through nonradiative Forster resonance energy transfer in the heterostructure of layer-by-layer spaced ... -
Supramolecular peptide nanofiber morphology affects mechanotransduction of stem cells
(American Chemical Society, 2017-08)Chirality and morphology are essential factors for protein function and interactions with other biomacromolecules. Extracellular matrix (ECM) proteins are also similar to other proteins in this sense; however, the complexity ... -
Swollen liquid crystals (SLCs): A versatile template for the synthesis of nano structured materials
(Royal Society of Chemistry, 2017)Liquid crystal (LCs) is the state of matter that exhibits properties between a conventional liquid and solid crystals. Liquid crystals mainly can be classified into two types: thermotropic and lyotropic liquid crystals. A ... -
Synthesis and size differentiation of Ge nanocrystals in amorphous SiO 2
(Springer, 2006)Germanosilicate layers were grown on Si substrates by plasma enhanced chemical vapor deposition (PECVD) and annealed at different temperatures ranging from 700-1010 °C for durations of 5 to 60 min. Transmission electron ... -
Synthesis of solid solutions of Cd1-xZnxS nanocrystals in the channels of mesostructured silica films
(Royal Society of Chemistry, 2006)In this contribution, we introduce the use of metal ion (Cd(ii) and Zn(ii)) modified mesostructured silica as a reaction medium, to produce a solid solution of Cd1-xZnxS nanocrystals as a thin film. With this approach, a ...
