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Papers by Werner Blau

Journal of Materials Chemistry C, 2020

Monolayer-enriched liquid phase exfoliated WS2 is embedded into a polymer matrix. The resultant t... more Monolayer-enriched liquid phase exfoliated WS2 is embedded into a polymer matrix. The resultant thin films are homogeneous, mechanically robust and smooth. Optical monolayer properties (e.g. photoluminescence) of the WS2 are retained in the films.

Nature Communications, 2019

Elementary tellurium is currently of great interest as an element with potential promise in nano-... more Elementary tellurium is currently of great interest as an element with potential promise in nano-technology applications because of the recent discovery regarding its three two-dimensional phases and the existence of Weyl nodes around its Femi level. Here, we report on the unique nano-photonic properties of elemental tellurium particles [Te(0)], as harvest from a culture of a tellurium-oxyanion respiring bacteria. The bacterially-formed nano-crystals prove effective in the photonic applications tested compared to the chemically-formed nano-materials, suggesting a unique and environmentally friendly route of synthesis. Nonlinear optical measurements of this material reveal the strong saturable absorption and nonlinear optical extinctions induced by Mie scattering over broad temporal and wavelength ranges. In both cases, Te-nanoparticles exhibit superior optical nonlinearity compared to graphene. We demonstrate that biological tellurium can be used for a variety of photonic applicatio...

Advanced Materials for Optics and Electronics, 1994

Frontiers in Optics, 2003

Organic light emitting diodes with a novel metallic nanowire array anode were fabricated from cop... more Organic light emitting diodes with a novel metallic nanowire array anode were fabricated from copper filled porous alumina. A light-emitting polymer was used as the emissive material. Electrical characteristics and electroluminescence spectra are presented.

2016 10th International Congress on Advanced Electromagnetic Materials in Microwaves and Optics (METAMATERIALS), 2016

Chemistry – A European Journal, 2017

Journal of Nanoscience and Nanotechnology, 2017

Nonlinear Optics for the Information Society, 2001

The understanding of the topological partitioning of electronic properties (TPEP) approach descri... more The understanding of the topological partitioning of electronic properties (TPEP) approach described in ref 6 was enhanced. Distributed polarisability calculations were employed to investigate the effect of interaction on electronic properties in molecular assemblies. It was found that as molecules become more polarised, they become less polarisable. Charge flow between two water molecules is only significant along the direction of the hydrogen bond.

MRS Proceedings, 2001

A new design for a field effect transistor able to push back the physical limits of Moore's L... more A new design for a field effect transistor able to push back the physical limits of Moore's Law is described. An ab initio computational approach is presented that can be further developed to characterize the ON/OFF states of such a device. Distributed response analysis (M. in het Panhuis, P.L.A. Popelier, R.W. Munn, J.G. Ágyán (2001), J. Chem. Phys. 114, 7951-7961) is employed to investigate conductive behavior. The method demonstrates that in analogy to conduction an electron can move across a possible conjugated molecular switching element (para-nitroaniline) in an electric field.

Physics and Chemistry of Finite Systems: From Clusters to Crystals, 1992

Nanometric gold colloids in water, varying in size from 20–4000A possess a large third order nonl... more Nanometric gold colloids in water, varying in size from 20–4000A possess a large third order nonlinear optical response at wavelengths of 612nm and 651nm. Near the surface plasmon resonance frequency it is reported to be very strongly resonantly enhanced1,2. We have performed experiments to determine values for the imaginary part of the nonlinear susceptibility. They are found to be of the orders 10−17m2/V2 (10−9 esu). According to the free electron theory χ(3) should vary as the inverse third power of the particle radius2. In our experiments, however, we find no relationship between nonlinearity and particle size. The experimental curves are fitted using a theoretical rate equation model. From this we can obtain the excited state properties of the particles quantitatively.