Open menu

Nanotechnology Spotlight

Behind the buzz and beyond the hype:
Our Nanowerk-exclusive feature articles

RSS Subscribe to our Nanotechnology Spotlight feed

Showing Spotlights 49 - 56 of 1646 in category (newest first):

 

New synthesis method for graphene using agricultural waste

grapheneResearchers have proposed an alternative way of making graphene from rice husk. This research, using an ordinary synthetic apparatus and abundant agricultural waste, suggest that low cost graphene materials could now be easily and cheaply synthesized on an industrial scale. Due to its abundance, risk husk has already received much attention as a starting material in generating high-value-added materials such as silica and porous carbon.

Posted: Apr 7th, 2014

Brain-on-a-chip

artificial_brainScientists have great expectations that nanotechnologies will bring them closer to the goal of creating computer systems that can simulate and emulate the brain's abilities for sensation, perception, action, interaction and cognition while rivaling its low power consumption and compact size - basically a brain-on-a-chip. Already, scientists are working hard on laying the foundations for what is called neuromorphic engineering - a new interdisciplinary discipline that includes nanotechnologies and whose goal is to design artificial neural systems with physical architectures similar to biological nervous systems.

Posted: Apr 4th, 2014

Interwoven solar cells turn T-shirt into a power textile

woven_solar_cellNew solar cell technology allows your T-shirt to generate power from its interwoven solar cell wires. Researchers have developed a novel efficient wire-shaped polymer solar cell by incorporating a thin layer of titania nanoparticles between the photoactive material and electrode. An aligned carbon nanotube fiber enabled high flexibility and stability of the resulting polymer solar cell. These miniature polymer solar cell wires, when woven into textiles, can serve as a power source.

Posted: Apr 3rd, 2014

Smallest DNA origami nanorobot yet has a switchable flap

nanobot_with_flapNot to be confused with the nanorobots of science fiction, for medical nanotechnology researchers a nanorobot, or nanobot, is a popular term for molecules with a unique property that enables them to be programmed to carry out a specific task. In what is the smallest 3D DNA origami box so far, researchers in Italy have now fabricated a nanorobot with a switchable flap that, when instructed with a freely defined molecular message, can perform a specifically programmed duty. Slightly larger nanocontainers with a controllable lid have already been demonstrated by others to be suitable for the delivery of drugs or molecular signals, but this new cylindrical nanobot has an innovative opening mechanism.

Posted: Apr 2nd, 2014

Digital nanofluidics - manipulating water droplets on surfaces

nanodropletsExisting nanofluidic approaches to facilitate the manipulation of ultra-small amounts of liquids usually require their confinement within quasi-1D nanochannels or nanopores. In these devices, the movement of the liquid objects must follow pre-designed routes. Researchers have now demonstrated a new platform for digital nanofluidics where water nanodroplets are trapped between a mica surface and graphene. Here, with the assistance of a graphene protection layer and ice-like lubricant monolayer, water nanodroplets can be moved, merged, separated, and patterned into regular arrays freely within a two-dimensional channel.

Posted: Mar 31st, 2014

Novel water treatment technology
surfaces at Ingenuity Lab

planetConcern about the depletion of global water resources has grown rapidly in the past decade due to our increasing global population and growing demand for other diverse applications. Since only 2.5% of the Earth's water is fresh, it has been reported that almost half of the world's population is at risk of a water crisis by the year 2025. Accordingly, significant research efforts have been focused on the desalination of brackish/seawater and the remediation and reuse of wastewater to meet the agricultural, industrial, and domestic water demands.

Posted: Mar 27th, 2014

Nanotechnology water remediation with bulky graphene materials

water_dropIndividual graphene sheets and their functionalized derivatives have been used to remove metal ions and organic pollutants from water. These graphene-based nanomaterials show quite high adsorption performance as adsorbents. However they also cause additional cost because the removal of these adsorbent materials after usage is difficult and there is the risk of secondary environmental pollution unless the nanomaterials are collected completely after usage. One solution to this problem would be the assembly of individual sheets into three-dimensional (3D) macroscopic structures which would preserve the unique properties of individual graphene sheets, and offer easy collecting and recycling after water remediation.

Posted: Mar 26th, 2014

Spit on it - Micro fuel cell powered by saliva

micro_fuel_cellBy miniaturizing microbial fuel cells, it becomes possible to build miniature energy harvesters that could power lab-on-chip or point-of-care diagnostics devices independent of any external power source. Because micro-sized microbial fuel cells utilize less electrode area and less liquid fuel volume than their macro-sized counterparts, optimizing the electrodes and the fuel sources are the most important factors in designing a micro-sized MFC for maximum power production.

Posted: Mar 24th, 2014