Materials Literature
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Introduction Amolecule is said to be mesogenic if it is able to form liquid crystalline phases. However, the actual occurrence of liquid crystallinity depends on other factors as well. In thermotropic systems, the liquid crystalline phase only exists within a particular temperature range. It lies between the crystal m…
Energy needs of future mobile devices Renewable energy – portable energy sources The increasing need for portable energy storage density due to the growing number of miniaturized and thin devices is driving the current development of energy storage in phones and other portable devices [1]. Figure 3.1 shows the develop…
In a fusion device, long pulse operation adds a set of specific constraints on actuators and internal components. Some of these issues are analyzed through the 20-year experience of Tore Supra which is, to date, the largest Tokamak that is able to run long-duration discharges (hundreds of seconds). Superconducting mag…
S12363 is a potent therapeutic agent with a strong in vitro activity against a variety of tumor types but also a high in vivo toxicity. Loading of this drug into long-circulating liposomes is expected to enhance its therapeutic index. Pharmacokinetics of liposomal S12363 showed that circulating S12363 was entrapped in…
The conductivity of colloidal inks composed of poly(ethylene glycol) (PEG), 2-(4-tert-Butylphenyl)-5-(4-biphenylyl)- 1,3,4-oxadiazole (tPBD) or polystyrene-tPBD copolymerized colloids (PS-PBD) and carbon black (CB) were investigated to establish their percolation characteristics. The PS-PBD colloid supported inks (PEG…
In order to understand the thermal quenching of rare-earth doped phosphors, the clarification of electronic energy structure of excited states is an important step. As an experimental approach, the photoconductivity measurement of the phosphor is one of the effective methods to clarify the direct interaction of the ex…
Block copolymers have drawn increasing attention for fabricating functional nanomaterials due to their properties of self-assembly. In particular, photonic crystals hold promise for multiple optical applications. We prepared 1D photonic crystals with polystyrene-b-poly(2-vinyl pyridine) (PS-b-P2VP) lamellar films whic…
Integrated photonics has the potential of fabricating a diverse set of photonic systems on a single substrate. At nanoscales (< 100 nm), the properties of material depend on quantum confinements. The challenge is to integrate these unique properties of nanostructures into low-cost manufacturing. For material depositio…
We present the use of luminescent terbium complexes (LTCs) as FRET donors and luminescent semiconductor quantum dots (QDs) as FRET acceptors for spectroscopic ruler measurements. The LTCs were labeled to polyhistidine-appended peptides which self-assembled onto three different QDs allowing optical multiplexed measurem…
Single pulse femtosecond laser damage in transparent dielectrics has been shown to occur through nonlinear damage mechanisms that can allow material removal on scales well below the classical limit of the order of the wavelength of the incident light. These mechanisms can be harnessed to allow the optical machining of…
Cerium-doped lanthanum fluoride colloidal nanocrystals offer a way to improve radiation therapy through the enhanced absorption of high-energy photons. Lanthanum fluoride nanocrystals doped with 10% cerium and capped with oleic acid were synthesized in anhydrous methanol as platelets 3-6 nm in diameter and 1-3 nm thic…
Optical emission spectroscopy (OES) measurements were carried out to study premixed C2H4/O2 and C2H4/C2H2/O2 combustion flame for diamond deposition with and without a CO2 laser excitation. Strong emissions from radicals C2 and CH were observed in the visible range in all the OES spectra acquired. By adding a continuo…
The non-polar m-plane GaN film and polarized InGaN/GaN light-emitting diode (LED) grown by metal-organic chemical vapor deposition (MOCVD) on LiAlO2(100) substrates were investigated. Firstly, the simulation of excitonic transition energies and polarization effects on band structure of non-polar plane GaN was studied…
A metallic nanoparticle can act as an optical antenna, enhancing the fluorescence of nearby fluorescent molecules. We investigate the effects of a silica spacer layer on this fluorescence enhancement. Numerical simulations using the Finite- Difference Time Domain (FDTD) method is performed to find the optimum size for…
We have studied the fluence dependence of the laser tailoring of colloidal gold particles with radii below R = 25 nm. For this purpose gold nanoparticles in solution have been irradiated with nanosecond-pulsed laser light applying fluences between F = (25 ± 2) mJ/cm2 and F = (49 ± 2) mJ/cm2. In general, laser tailorin…
We have implemented a polarization-resolved coherent anti-Stokes Raman scattering (CARS) microscopy, based on the continuous variation of the incident linear polarization at the pump and Stokes wavelengths, together with a polarized analysis of the anti-Stokes signal. In isotropic media, such as solutions, this techni…
In vitro studies were initiated to determine the suitability of murine and rat macrophages as delivery vehicles for gold nanoshells in the treatment of gliomas. Visualization of macrophage accumulation in and around gliomas may be accomplished using magnetic resonance imaging (MRI) and superparamagnetic iron oxide nan…
In this work, we show that the resonant angle of surface plasmons (SPs) excited on a unique type of nanostructured metal can be significantly different from the calculated values. We also find that the excitation of SPs can significantly enhance photoelectron emission on the structured metal surfaces.
A new type of cationically polymerizable organic-inorganic hybrid nanocomposite with micro-patternability and tailor able thermomechanical properties has been developed[1]. The material has been built by co-condensation of 3-glycidyloxypropyl-triethoxysilane and phenyltriethoxysilane followed by subsequent mixing with…
Indium phosphide (InP) nanocrystals show similar absorbance and emission spectra to CdTe quantum dots, but unlike particles containing cadmium, may potentially be used in in vivo applications. However, the particles are more challenging to make water-soluble, show broader emission spectra than most quantum dots, and t…