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Archive for the 'Energy' Category

More energy

Posted by J. Storrs Hall on April 2nd, 2009

The power density is large compared to that of macroscale motors: >1e15 W/m^3. For comparison, Earth intercepts ~1e17 watts of solar radiation. (Cooling constraints presumably preclude the steady-state operation of a cubic meter of these devices at this power density.) Nanosystems p. 339 It is difficult, even for someone who has been working with these [...]

“Cold fusion” redux?

Posted by J. Storrs Hall on March 24th, 2009

20 years ago, in the wake of the cold fusion excitement-turned-debacle, I noticed an interesting fact. The people doing the experiments were divided into two classes: The electrochemists who believed that fusion was happening were doing their experiments in plastic tubs and glassware, whereas the physicists who believed that no fusion was really happening were [...]

Videos from Convergence08 Unconference available

Posted by Jim Lewis on March 20th, 2009

Jeriaska has made available videos of presentations from Convergence08, held on November 15-16, 2008 in Mountain View, California, to examine the convergence of NBIC (Nano-Bio-Info-Cogno) technologies. Among those of special interest to Nanodot readers: Mapping a Cone of Uncertainty, Paul Saffo Convergence: Artificial Intelligence Panel, Peter Norvig, Steve Omohundro, Ben Goertzel, Barney Pell Convergence: Synthetic [...]

Nanotechnology may replace platinum catalyst for fuel cells with doped carbon nanotubes

Posted by Jim Lewis on February 27th, 2009

The discovery that nitrogen-doped, metal-free carbon nanotubes make better electrodes than do platinum nanoparticles may open the way for inexpensive nanotech fuel cells.

Making energy transfer in solar cells more efficient

Posted by Jim Lewis on February 2nd, 2009

Canadian scientists have discovered how chemical structure can elicit a quantum state that permits the ultrafast movement of energy along an organic polymer.

Preparing semiconducting carbon nanotubes for nanotechnology applications

Posted by Jim Lewis on January 19th, 2009

A method that eliminates metallic single walled carbon nanotubes from mixtures leaving fully functional semiconducting SWCNTs may open the way for various nanotech applications that require pure semiconducting SWCNTs.

Nanotechnology to make inexpensive solar cells more efficient

Posted by Jim Lewis on January 12th, 2009

An open-access review article describes how a layer of nanoparticles of different sizes, compositions, and shapes enhances the efficiency of thin-film solar cells.

Tell NIST how nanotechnology could address a critical national and societal need

Posted by Jim Lewis on December 29th, 2008

If you have a proposal on how nanotech could address a critical national and societal need, the National Institute of Standards and Technology (NIST) wants to hear from you.

The weather machine

Posted by J. Storrs Hall on December 23rd, 2008

The following is an edited and revised version of the talk I gave at the Global Catastrophic Risks conference that was held in conjunction with Convergence 08 (and which I reprised for Convergence). I’m posting it here because it seems to me that this is exactly the kind of thing Foresight was founded for: to [...]

Using nanotechnology to separate electrons and holes in thin-film solar cells

Posted by Jim Lewis on December 3rd, 2008

A nanostructure called a “gyroid” provides the basis for a more efficient, inexpensive nanotech solar cell.

Mass production method for nanotechnology wonder material

Posted by Jim Lewis on November 11th, 2008

The publication of a method to mass produce graphene has opened the way to further study of this remarkable nanomaterial.

Nanotechnology provides antireflective coating to boost solar cell efficiency

Posted by Jim Lewis on November 5th, 2008

By nearly eliminating the light lost to solar cells by reflection, a nanotech coating promises to increase solar cell efficiency.

Computational nanotechnology designs more efficient material for solar cells

Posted by Jim Lewis on October 22nd, 2008

Combining electrically conductive polymers, transition metal atoms, and spin-coating to form thin films could lead to solar cells with two major advantages that would make them more efficient at converting light to electricity.

European conference focuses on nanotechnology as alternative to fossil fuels

Posted by Jim Lewis on October 15th, 2008

Nanotech pathways to a sustainable energy economy are generating a great deal of interest in Europe.

Another nanotechnology route to better ultracapacitors for energy storage

Posted by Jim Lewis on September 26th, 2008

Chemically modified graphene has found in manganese oxide nanoflower/carbon nanotube array a rival nanotech material to improve energy storage using ultracapacitors.

Graphene nanotechnology promises better power storage

Posted by Jim Lewis on September 18th, 2008

Chemically modified graphene (CMG) may lead to ultracapacitors that can store about twice as much electrical charge as is possible with current commercially available materials.

Nanotechnology defines gold catalysts to near atomic precision

Posted by Jim Lewis on September 12th, 2008

A very powerful electron microscope capable of resolving single gold atoms has revealed why some gold nanoparticles work and some don’t.

Nanowire network may provide hydrogen for fuel via nanotechnology

Posted by Jim Lewis on September 4th, 2008

A web of single-crystalline titanium disilicide absorbs light efficiently and may be a useful catalyst to split water.

Multiple nanotechnology paths lead to harvesting solar energy

Posted by Jim Lewis on August 26th, 2008

Two stories today in ScienceDaily point to different nanotech applications that could enable a solar solution to our energy problems.

Nanotechnology provides key to turning waste into ethanol

Posted by Jim Lewis on August 21st, 2008

A new nanotech catalyst now enables the efficient conversion of syngas to ethanol.