Publications by authors named "Peter K Kristensen"
The recycling of lithium-ion batteries (LIBs) has been dogged by air pollutants containing fluoride (e.g. HF, PF, POF).
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- Water is a highly reactive and abundant substance that significantly affects the properties of metal-organic frameworks (MOFs), which are a rapidly developing class of materials.
- Research shows that high-pressure water vapor can drastically change the structure and characteristics of MOF glasses, particularly a variant known as ZIF-62.
- Key findings highlight that under specific heat treatments and water vapor pressures, the melting and glass transition temperatures of the MOF can drop by over 100 °C, while its hardness and Young's modulus can increase by up to 100%.
Hetero-photocatalytic graphene-TiO materials have, in the literature, been found to possess better photocatalytic activity for environmental applications compared to pure TiO. These types of materials can be prepared in different ways; however, their photocatalytic performance and quality are not easily controlled and reproduced. Therefore, we synthetized graphene oxide-TiO nanoparticles by sol-gel reaction from TiCl, as precursor, with two different methods of synthesis and with a graphene oxide (GO) loading ranging from 0 to 1.
View Article and Find Full Text PDFIn the stage lighting and entertainment market, light engines (LEs) for lighting fixtures are often based on high-intensity discharge (HID) bulbs. Switching to LED-based light engines gives possibilities for fast switching, additive color mixing, a longer lifetime, and potentially, more energy-efficient systems. The lumen output of a single LED is still not sufficient to replace an HID source in high-output profile fixtures, but combining multiple LEDs can create an LE with a similar output, but with added complexity.
View Article and Find Full Text PDFNonfouling tunable βCD dextran polymer films for protein applications.
ACS Appl Mater Interfaces
February 2015
Article Synopsis
- Researchers developed tunable polymeric β-cyclodextrin (βCD) films that can be adjusted for thickness and βCD content to improve their functionality and reduce protein adsorption.
- The films, created from βCD dextran polymers and attached to silicon oxide using "click" chemistry, show controlled topology with heights ranging from 2.5 to 12.5 nm.
- Tests demonstrated that while thicker films had limited access to βCD cavities for certain probes, enhancing ionic strength with NaCl significantly improved access and also reduced nonspecific protein adhesion by 5- to 10-fold compared to uncoated surfaces.
Antireflective properties of one-dimensional periodically microstructured lens surfaces (refractive index 1.5) are studied with the Green's function surface integral equation method, and design guidelines are obtained. Special attention is given to the requirement of having practically all incident light transmitted in the fundamental transmission diffraction order.
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