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Archive for the 'Computational nanotechnology' Category

Femtosecond imaging with near nanometer spatial resolution

Posted by Jim Lewis on August 31st, 2015

Analysis of multiple diffraction images provides high contrast, high quality, full field 3D imaging of surfaces illuminated by extreme ultraviolet photons from a tabletop laser.

Novel wireframe nanostructures from new DNA origami design process

Posted by Jim Lewis on August 18th, 2015

A new set of design rules enables constructing any wireframe nanostructure, which may lead to new medical applications and new nanomachines.

Conference video: Artificial Biochemistry with DNA

Posted by Jim Lewis on August 13th, 2015

Modeling DNA strand displacement cascades according to three simple rules can in principle mimic the temporal dynamics of any other chemical system, presenting a method to model regulatory networks even more complicated than those of biology.

Google Tech Talk video by Feynman Prize Winner

Posted by Jim Lewis on June 24th, 2015

Designing and building spiroligomers, robust building blocks of various 3D shapes made from unnatural amino acids, decorated with various functional groups, and linked rigidly together by pairs of bonds, and a new approach to nanotechnology design software.

Computational nanotechnology reveals complex interactions in double-walled carbon nanotubes

Posted by Jim Lewis on June 8th, 2015

Density functional theory calculations of the electronic properties of double-walled carbon nanotubes (DWCNTs) comprising two concentric zigzag tubes of different chiralities reveal complex effects upon the electronic band gap, identifying candidate combinations for diverse applications from transistors to macroscopic conducting wires.

Computational nanotechnology to benefit from expanded first-principles molecular dynamics

Posted by Jim Lewis on June 7th, 2015

A combination of techniques has made possible the expansion of problems that can be handled by first-principles molecular dynamics from a few hundred atoms to a very large system containing 32,768 atoms.

Conference video: Microscopic Reversibility: The Organizing Principle for Molecular Machines

Posted by Jim Lewis on May 13th, 2015

At the 2013 Conference Dean Astumian contrasted macroscopic machines at static equilibrium and molecular machines at dynamic equilibrium, and presented information ratchets and microscopic reversibility as the organizing principle of molecular machines.

Conference video: Multi-Million Atom Simulations for Single Atom Transistor Structures

Posted by Jim Lewis on May 12th, 2015

At the 2013 Conference Gerhard Klimeck presented the work of his computational nanotechnology network modeling nanoelectronic devices, using simulations of multi-million atom domains to understand the function of single atom devices embedded in larger nanostructures.

Nanothreads formed from smallest possible diamonds

Posted by Jim Lewis on May 2nd, 2015

A new form of carbon produced by very slowly releasing benzene compressed at 200,000 times atmospheric pressure may be the strongest material possible.

Foresight Institute Awards Feynman Prizes in Nanotechnology to Amanda S. Barnard, Joseph W. Lyding

Posted by Jim Lewis on April 23rd, 2015

The Theory Prize was given for research into diamond nanoparticles; the Experimental Prize was given for development of scanning tunneling microscope (STM) technology.

New scaffold for nanotechnology engineered from amyloid-like proteins

Posted by Jim Lewis on April 4th, 2015

Design and computational simulation of amyloid proteins of diverse functions from diverse sources enable the self-assembly of proteins that could provide scaffolds for diverse applications.

Small, fast, electrically-driven nanomotors

Posted by Jim Lewis on March 5th, 2015

Bulk nanoscale technologies were used to create three-segment nanowires of gold and nickel, and magnetic bearings of gold, nickel, and chromium. Combinations of DC and AC electric fields were used to assemble nanomotors that can spin at speeds up to 18,000r.p.m., and for up to 15 hours.

Penta-graphene a new form of carbon for chemistry and nanotechnology

Posted by Jim Lewis on February 4th, 2015

Computational simulations demonstrate that pentagonal tiling to give a variant of graphene based on pentagons rather than on hexagons is dynamically, thermally, and mechanically stable.

New software reveals more molecular machine structures

Posted by Jim Lewis on December 31st, 2014

New software makes it possible to generate 3D structures of proteins without artificially incorporating metal atoms in the proteins, making it possible to study many molecular machines using data that could not previously be analyzed.

Computational framework for structural DNA nanotechnology

Posted by Jim Lewis on December 27th, 2014

A more general computational framework predicts the structures of 2D and 3D-curved DNA nanostructures impossible to predict using previously available computational methods. May lead to 3D-printing DNA nanostructures?

Large, open protein cages designed and built

Posted by Jim Lewis on December 7th, 2014

Design principles have been developed and tested to construct novel synthetic protein monomers that can self-assemble into large, open protein cages for potential use in vaccines and drug delivery.

Broadening the synthetic biology path to molecular nanotechnology

Posted by Jim Lewis on December 6th, 2014

Advances in the de novo design of coiled-coil proteins made by two different research groups proceeding by two different routes demonstrate that the range of protein nanostructures potentially available for various molecular machine systems is significantly larger than the range of such structures already exploited by natural selection.

Using DNA nanotechnology to cast arbitrarily shaped nanoparticles

Posted by Jim Lewis on November 11th, 2014

Metal or other inorganic nanoparticles of 20 to 30-nm scale can be cast in arbitrary 3D shapes and configurations dictated by stiff, atomically precise molds constructed using scaffold DNA origami.

Recent cases of 'accessible' high-tech: Open source chips & Origami robots

Posted by Stephanie C on August 22nd, 2014

Nanotech promises more commonplace access to advanced technology as material and fabrication costs fall and traditional barriers to innovation are removed. Examples are already being seen globally: more access to laptops and cell phones in developing countries, desktop 3D printers, a surge in establishment of shared-use research facilities, etc. A couple recent cases getting attention [...]

Surprisingly real value from virtual reality

Posted by Stephanie C on August 21st, 2014

Speaking of big computation, cyberspace isn’t yet as potent as Neal Stephenson portrayed in Snow Crash and subsequent books, but it’s getting there. A new article in the Wall Street Journal online titled Can World of Warcraft Game Skills Help Land a Job? states that some job seekers are adding gaming skills to their resumes [...]