Browsing by Author "BLAU, WERNER"
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Measurement of Degree of Order in Mixed Polarised Fluorescent Polymer Liquid Crystal Films
BLAU, WERNER (1998)Raman spectroscopy is used to investigate the degree of order found in in situ photopolymerised films exhibiting polarised emission. Studies indicate that the mixed system shows differing degrees of order for its two ... -
Measurement of nanotube content in pyrolytically generated carbon soot
COLEMAN, JONATHAN; BLAU, WERNER; DRURY, ANNA (2000)Carbon nanotubes can be efficiently separated from impurity material in carbon soot using a conjugated polymer filtration system as monitored by EPR, allowing the calculation of purity of the crude carbon soot. -
Modeling of nonlinear absorption of 5,10-a(2)b(2) porphyrins in the nanosecond regime.
BLAU, WERNER; WANG, JING JING; SENGE, MATHIAS (2013)The nonlinear absorption (NLA) properties of free base and metalated porphyrins with a unique 5,10- A2B2 substitution pattern were studied with open Z-scan technique at 532 nm in the nanosecond regime over a broad range ... -
Molecular Engineering of Nonplanar Porphyrin and Carbon Nanotube Assemblies- a Linear and Nonlinear Spectroscopic and Modeling Study
GIORDANI, SILVIA; SENGE, MATHIAS; RICKARD, DAVID; BLAU, WERNER (2011)The importance of molecular conformation to the nature and strength of noncovalent interactions existing between a series of increasingly nonplanar tetraphenylporphyrin (TPP) derivatives and carbon nanotubes was systematically ... -
Morphological and mechanical properties of carbon-nanotube-reinforced semicrystalline and amorphous polymer composites
COLEMAN, JONATHAN NESBIT; BLAU, WERNER (American Institute of Physics, 2002)In this work, multiwalled carbon nanotubes were investigated as potential mechanical reinforcement agents in two hosts, polyvinyl alcohol (PVA) and poly(9-vinyl carbazole) (PVK). It was found that, by adding various ... -
Multi-walled carbon nanotubes covalently functionalized with polyhedral oligomeric silsesquioxanes for optical limiting
BLAU, WERNER; WANG, JUN (2010)A soluble polyhedral oligomeric silsesquioxane (POSS) functionalized multi-walled carbon nanotube (MWCNT) hybrid material (MWCNT/POSS) was synthesized, in which the POSS content was estimated to be 44wt.%. This material ... -
Near-infrared dye having a large ultrafast third-order susceptibility
BLAU, WERNER (1986)Efficient degenerate four-wave mixing of 160-psec infrared light pulses at ? = 1.064 ?m in solutions of a new dye that absorbs between 1.0 and 1.6 ?m is reported. A Kerr-like third-order susceptibility of X(3)xyyx = 8 ? ... -
New axially aryloxy substituted gallium phthalocyanines for nonlinear optics
BLAU, WERNER (2003)The ability to control reductions in the saturation energy density is important from the point of view of realizing applications where one would require successive layers in the practical limiter to be fabricated from ... -
New rigid backbone conjugated organic polymers with large fluorescence quantum yields
BLAU, WERNER (1995)The effect on optical emission of the presence of carbon?carbon triple bond linkages in conjugated aromatic copolymers is studied and leads to fluorescence quantum yields of up to 50%, substantially higher than most ... -
Non-linear optical properties of Group 10 metal alkynyls and their polymers
BLAU, WERNER (1991)Conjugated diacetylene and phenylacetylene systems incorporating Group 10 transition-metal complexes have been obtained via lithium acetylide intermediates. In the UV?VIS spectra, the positioning of the longest-wavelength ... -
Nonlinear absorption properties of 5,10-A2B2 porphyrins - correlation of molecular structure with the nonlinear responses
BLAU, WERNER; SENGE, MATHIAS; WANG, JING (2013)The nonlinear absorption properties of two series of novel free base and metalated meso 5,10-A 2 B 2 sub- stituted porphyrins, both bearing p -tolyl as an A substituent and TMS-ethynyl or bromine as a B substitu- ent, ... -
Nonlinear absorption properties of some 1,4,8,11,15,18,22,25-octaalkylphthalocyanines and their metallated derivatives
BLAU, WERNER (2003)The third-order nonlinear optical properties of a series of 15 unmetallated and metallated 1,4,8,11,15,18,22,25-octaalkylphthalocyanines have been investigated. The palladium-metallated compound is the strongest nonlinear ... -
Nonlinear optical propagation in a tandem structure comprising nonlinear absorption and scattering materials
BLAU, WERNER (2014)Laser propagation in a tandem structure comprising carbon nanotubes and phthalocyanines is studied by Z-scan method. Due to the different mechanisms of the two materials, the laser beam can be attenuated with different ... -
Nonlinear Optical Properties of Graphene and Carbon Nanotube Composites
BLAU, WERNER (InTech Europe, 2011)The rapid development of nanoscience and nanotechnology provides lots of new opportunities for nonlinear optics. A growing number of nanomaterials have been shown to possess remarkable nonlinear optical (NLO) properties, ... -
Optical limiting study of double wall carbon nanotube-Fullerene hybrids
BLAU, WERNER; WANG, JUN (2010)In order to merge complementary temporal and spatial nonlinear optical characteristics of Fullerene and carbon nanotubes, synthesis of double wall carbon nanotube?Fullerene hybrid was performed by covalently linking DWNT ... -
Optical phase conjugation In a soluble polymer
BLAU, WERNER (1986)Degenerate four-wave mixing of picosecond light pulses in polydiacetylene dissolved in toluene has been observed. Phase conjugate reflectivities of over 100% were obtained. The origin of the non-linear interaction was found ... -
Origin of electrophosphorescence from a doped polymer light emitting diode
BLAU, WERNER (2001)The origin of electrophosphorescence from a doped polymer light emitting diode(LED)has been investi- gated. A luminescent polymer host, poly (9,9-dioctylfluorene)(PFO), was doped with a red phosphorescent dye, ... -
Percolation-dominated conductivity in a conjugated-polymer-carbon-nanotube composite
COLEMAN, JONATHAN NESBIT; BARKLIE, ROBERT CHARLES; BLAU, WERNER (1998)We have made electrical measurements on a system using carbon nanotubes as the dopant material. A semiconjugated, organic polymer was mixed with carbon nanotubes to form a wholly organic composite. Composite formation from ... -
Phase-matched gratings for enhanced forward degenerate four-wave mixing
BLAU, WERNER (1995)A phase-matched grating to enhance the second-order diffracted signals generated by forward degenerate four-wave mixing has been proposed and demonstrated for the first time to the authors' knowledge. Experiments have been ... -
Photodarkening effect and the optical nonlinearity in a quantum-confined, semiconductor-doped glass
BLAU, WERNER (1990)The room-temperature optical nonlinear behavior of a quantum-confined CdSe-doped glass with ?25-?-size particles is examined. The photodarkening effect is found to be important in this glass. The effect and its influence ...