In microbial fuell cells, the anode material as the medium of electron transfer and as the support for biofilm formation is a key component that determines the effectiveness and efficiency of power generation. Generally, the anode will perform better if the anode material has a greater specific surface area and higher affinity for living bacterial cells. The direct carbonization of low-cost and naturally available materials provides a potential alternative to commercial anodes with high specific surface area. In new work, scientists demonstrate a new procedure to generate novel macroporous carbon prepared from a fibrous loofah sponge.
Researchers demonstrate a strategy for the fabrication of memristive nanodevices with stable and tunable performance by assembling ferritin monolayer inside a on-wire lithography-generated 12 nm gap. This work work uses the unique high iron loading capacity of Archaeoglobus fulgidus ferritin. The iron loading in the nanocages drastically impacts the performance of the memristive devices. The higher iron loading amount contributes to better memristive performance due to higher electrochemical activity of the ferric complex core.
Their unique combinations of liquid and solid-like properties allow liquid crystals to be used pervasively in the electro-optical display technology - known as liquid crystal display (LCD). In new work, researchers have observed that a dilute suspension of a small amount of multi-walled carbon nanotubes in a nematic liquid crystal (in the nematic LC phase the molecules are oriented in parallel but not arranged in well-defined planes) results in a significantly faster nematic switching effect on application of an electric field.
The government of Thailand, realizing the importance of nanotechnology to economic growth, established the National Nanotechnology Center (NANOTEC) in 2003 as one of four national research centers under the National Science and Technology Development Agency. With an annual budget of US$11 million, NANOTEC is the key research funding agency for nanotechnology in Thailand. NANOTEC is investing in nanotechnology as a means of differentiating and adding value so that domestic products can compete effectively.
Silicon offers a unique combination between mechanical and electrical properties making it one of the most developed materials in semiconductor industry. However, silicon is brittle and cannot be flexed, hindering its potential for high performance electronics that is flexible, stretchable or applied to irregular shapes. Researchers have now developed a pragmatic approach to achieve high performance integrated electronic systems, including thermoelectric energy harvesters, onto flexible silicon substrates.
Researchers in Canada have demonstrated that it is possible to achieve graphite-like charge/discharge behavior in a sodium ion battery anodes through a controlled dilation of the intergraphene spacing in a tailored carbon. They utilized common peat moss as the carbon precursor, tuning the synthesis process to create macroscopically open nanoscale pseudographitic structures that also offers a unique high rate capability and superb charge-discharge cycling stability.
Previous work in stretchable, flexible electronics has shown that conventional, silicon wafer based fabrication techniques can be modified to apply electronics conformally to the heterogeneous topography of the skin. Now, researchers have demonstrated the development of a device platform that enables high precision temperature mapping of the skin in ways that have, until now, been extremely difficult in research and impossible to implement for widespread use.
The quest for efficient low-cost solutions for solar energy conversion faces many obstacles, both, fundamental and technical. As a result, even 'ideal' solar cells have maximum intrinsic efficiency - known as the Shockley-Queisser (S-Q) limit - of 33% for the illumination by the non-concentrated sunlight. A number of architectures have been proposed for reducing losses in solar cells in order to overcome the S-Q single-junction limit. Now, researchers have proposed a new way to break the fundamental S-Q limit by using a mechanism of thermal up-conversion.