162,149 research outputs found
Data for: Ultrasonic Spray Deposition of TiO2 Electron Transport Layers for High Efficiency Hybrid Perovskite Solar Cells
No full textData for use within the submitted paper "Ultrasonic Spray Deposition of TiO2 Electron Transport Layers for High Efficiency Hybrid Perovskite Solar Cells" by Sun et al
Controlled covalent surface immobilisation of proteins and peptides using plasma methods
No full textAbstract not availableBryan R. Coad, Marek Jasieniak, Stefani S. Griesser, Hans J. Griesse
Sol-gel thin films for photonic application
No full textFor the fabrication of photonic devices the sol-gel technique is a potentially lucrative alternative to methods such as physical vapor or chemical vapor deposition because of its solution-processability, low cost and relative ease of production. In this work we harness this potential by developing based photonic devices which incorporate highly luminescent CdSe@ZnS core-shell semiconductor quantum dots (QDs) doped within inorganic (TiO2, ZrO2) or hybrid organic-inorganic sol-gel films. As a pre-requisite to the formation of such devices, luminescent waveguides emitting between green and red have been obtained and their optical properties have been characterized. The photochemical stability of these waveguides was found to highly dependent on the exact sol-gel material used. QDs:Titania based composites were found to be inherently photo-unstable due to photoelectron injection into the bulk matrix and subsequent nanocrystal oxidation. In comparison, zirconia composites were significantly more robust with high photoluminescence retained up to annealing temperatures of 300 °C. Despite this difference in photo-chemical stability, both titania and zirconia composite waveguides exhibited amplified stimulated emission (ASE) with one-photon and two-photon optical pumping, however only zirconia based waveguides exhibited long term photostability. This Zirconia based films have been used for the realization of distributed feedback lasers and Bragg micro-cavities
3D printed lattices as an activation and expansion platform for T cell therapy
No full textLink to a related website: https://eprints.qut.edu.au/107857/1/107587.pdf, Open Access via UnpaywallAbstract not availableBahman Delalat, Frances Harding, Batjargal Gundsambuu, Elena M. De-Juan-Pardo, Felix M. Wunner, Marie-Luise Wille, Marek Jasieniak, Kristen A.L. Malatesta, Hans J. Griesser, Antonio Simula, Dietmar W. Hutmacher, Nicolas H. Voelcker, Simon C. Barr
[Report to Chief J. E. Curry, by an unknown author #1]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
[Report to Chief J. E. Curry, by an unknown author #2]
No full textReport to Chief J. E. Curry, by an unknown author. The report contains a list of officers who gave depositions to the United States Attorney
Luminescence and amplified stimulated emission in CdSe-ZnS-nanocrystal-doped TiO2 and ZrO2 waveguides
No full textA reproducible route for the preparation of high-quality CdSe–ZnS-doped titania and zirconia waveguides is presented. The
optical properties of the resultant composite materials are found to be sensitive to the semiconducting properties of the host
matrix. Titania-based composites are seen to be inherently photounstable because of photoelectron injection into the bulk matrix
and subsequent nanocrystal (NC) oxidation. In comparison, zirconia composites are significantly more robust with high
photoluminescence (PL) retained for annealing temperatures up to 300 °C. Both titania and zirconia composite waveguides
exhibit amplified stimulated emission (ASE); however only zirconia-based waveguides exhibit long-term photostability (loss of
less than 30%ASE intensity after more than 40 min continuous excitation).We conclude that the low electron affinity of zirconia
and its inherent high refractive index makes it an ideal candidate for NC-based optical waveguides
Engineering of semiconductor nanocrystals for light emitting applications
No full textSemiconductor nanocrystals are rapidly spreading into the display and lighting markets. Compared with liquid crystal and organic LED displays, nanocrystalline quantum dots (QDs) provide highly saturated colors, wide color gamut, resolution, rapid response time, optical efficiency, durability and low cost. This remarkable progress has been made possible by the rapid advances in the synthesis of colloidal QDs and by the progress in understanding the intriguing new physics exhibited by these nanoparticles. In this review, we provide support to the idea that suitably engineered core/graded-shell QDs exhibit exceptionally favorable optical properties, photoluminescence and optical gain, while keeping the synthesis facile and producing QDs well suited for light emitting applications. Solid-state laser emitters can greatly profit from QDs as efficient gain materials. Progress towards fabricating low threshold, solution processed DFB lasers that are optically pumped using one- and two-photon absorption is reviewed. In the field of display technologies, the exploitation of the exceptional photoluminescence properties of QDs for LCD backlighting has already advanced to commercial levels. The next big challenge is to develop the electroluminescence properties of QD to a similar state. We present an overview of QLED devices and of the great perspectives for next generation display and lighting technologies
Murder on the mountain: author talk with Peter J. Wosh
No full textAuthor talk by Peter J. Wosh on May 5th, 2022, on his book, "Murder on the Mountain: crime, passion, and punishment in gilded age New Jersey.
ToF-SIMS multivariate analysis of surface-grafted small bioactive molecules
No full textLink to a related website: https://digital.library.adelaide.edu.au/dspace/bitstream/2440/113363/3/hdl_113363.pdf, Open Access via UnpaywallIn the development of bioactive coatings on biomaterials, it is essential to characterize the successful fabrication and the uniformity of intended coatings by sensitive surface analytical techniques, so as to ensure reliable interpretation of observed biointerfacial responses. This can, however, be challenging when small bioactive molecules are grafted onto biomaterials surfaces at sub- and near-monolayer densities. Time-of-flight secondary ion mass spectrometry (ToF-SIMS) provides the required sensitivity, but ion signals from small grafted molecules may still be dominated by fragment ions from the underlying polymer. In such cases, multivariate analysis provides valuable enhancement of spectral data, as illustrated here by examples comprising the surface grafting of bioactive serrulatane molecules, the peptide GRGDSP, the oligonucleotide 15-thymidine, and the antifungal compound Amphotericin B. The authors also show how ToF-SIMS plus principal component analysis can distinguish between covalent grafting and physisorption of the antibiotics caspofungin and micafungin.Marek Jasieniak, Bryan R. Coad and Hans J. Griesser
- …
