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Nanoparticles Seen as Artificial Atoms

By Guest PostJune 1, 2012Scienceartificial atom, berkeley lab, capillary pressure, energy devices, epoxy, growth of crystals, haimei zheng, hong gang liao, iron, likun cui, liquid cell, molecular precursors, nanoparticle, organic solvent, platinum, pt3fe nanorod growth, real time imaging, roy kaltschmidt, solution, stephen whitelam, team, trajectories, transmission electron microscopy

Berkeley Lab Researchers Observations of Nanorod Crystal Growth Points Way to Next Generation Energy Devices

In the growth of crystals, do nanoparticles act as “artificial atoms” forming molecular-type building blocks that can assemble into complex structures? This is the contention of a major but controversial theory to explain nanocrystal growth. A study by researchers at the U.S. Department of Energy (DOE)’s Lawrence Berkeley National Laboratory (Berkeley Lab) may resolve the controversy and point the way to energy devices of the future.

Led by Haimei Zheng, a staff scientist in Berkeley Lab’s Materials Sciences Division, the researchers used a combination of transmission electron microscopy and advanced liquid cell handling techniques to carry out real-time observations of the growth of nanorods from nanoparticles of platinum and iron. Their observations support the theory of nanoparticles acting like artificial atoms during crystal growth. (more…)

New Twist on Ancient Math Problem Could Improve Medicine, Microelectronics

By Guest PostMay 15, 2012Scienceancient math problem, carolyn phillips, filling problem, hidden facet, medicine, microelectronics, microprocessor, Nanotechnology, pentagon, protein, radiation beam, sanskrit manuscript, sharon glotzer, silicon chip, solution, starfish, three dimensions, traps, treating tumor, two dimensions, university of connecticut, university of michigan

ANN ARBOR, Mich.— A hidden facet of a math problem that goes back to timeworn Sanskrit manuscripts has just been exposed by nanotechnology researchers at the University of Michigan and the University of Connecticut.

It turns out we’ve been missing a version of the famous “packing problem,” and its new guise could have implications for cancer treatment, secure wireless networks, microelectronics and demolitions, the researchers say.

Called the “filling problem,” it seeks the best way to cover the inside of an object with a particular shape, such as filling a triangle with discs of varying sizes. Unlike the traditional packing problem, the discs can overlap. It also differs from the “covering problem” because the discs can’t extend beyond the triangle’s boundaries. (more…)

Introducing Genome from Yahoo!, a New Solution Capitalizing on Yahoo!’s Vast Data and Designed to Significantly Improve Online Marketing Campaigns

By Guest PostMay 14, 2012Technologyaccuen media, advertiser roi, aol, billy beane, genome, interclick, internet week, josh jacobs, michele morelli, Microsoft, moneyball, new york, omnicom, online advertising, osm, rich riley, solution, Yahoo, yahoo data

Data Driven Best-in-Class Technology Uncovers Optimal Targeted Audiences at Scale in a Premium Media Ecosystem

NEW YORK — At Internet Week New York, Yahoo!, the premier digital media company, today announces Genome from Yahoo! (www.genomeplatform.com), an online advertising solution that combines Yahoo! data with interclick’s third party data and advertisers’ first party data along with a premium media footprint to provide marketers with the most complete, custom audience solution in the industry. Anticipated to be available in July 2012, Genome is the culmination of a strategy that was put in place last year with the display ad agreement with Microsoft and AOL as well as the acquisition of interclick, which Yahoo! acquired in December 2011, to create a next generation audience buying solution with greater targeting and personalization capabilities.

Genome, designed to leverage data to improve advertiser ROI, can provide marketers with actionable insights enabling them to conduct campaigns that help meet their objectives, and overcome an ever-evolving set of industry challenges that include the proliferation of data, fragmentation of technology, and outdated planning and buying techniques. Genome can help marketers organize and navigate the chaos of the data ecosystem while delivering results that can build brand value, increase conversion rates, and grow revenue. Genome combines the best of the technology, data, analytics and media from Yahoo! and interclick; from Yahoo! — premium media and unmatched user data with proven targeting capabilities— and interclick — unified technology stack, third-party data partnerships and expertise in analytics and audiences. (more…)

Not Your Parents’ Chem Labs

By Guest PostApril 25, 2012Educationacetone, anti-inflammatory, balance, benzene, borneol, carbon dioxide, carbon trachloride, catalyst, chalcone, chemical industry, chemistry, cloves, cookbook chemistry, cylindrical container, deane morrison, density, environmental problem, extract, fluid, general chemistry labs, graduated cylinder, grams per milliliter, greener, hazardous, industry, inorganic chemistry, james wollack, jane wissinger, josh jansen, lindsay nevalainen, liquid, marc hillmyer, michelle driessen, molecule, oil, organic chem, organic molecule, plastic, renewable resources, scale, sodium bromide, solution, solvent, university of minnesota, volume

‘Greener’ and more engaging experiments draw students in

As a college student, Michelle Driessen had an all-too-typical experience.

“I hated general chemistry,” she says. “I thought it was terribly boring.”

She had plenty of company. Experiments were all laid out in advance, and the goal seemed to be to get to a predetermined result without blowing up the glassware.

In the old days, “very few students appreciated the point of most general chemistry labs,” adds Driessen. “With cookbook chemistry, you couldn’t have anything go wrong or deviate [from what’s supposed to happen], but I find those things to be the most interesting part of science.” (more…)

First Atomic-Scale Real-Time Movies of Platinum Nanocrystal Growth in Liquids

By Guest PostApril 23, 2012Sciencealex zettl, alivisatos zettl collaboration, anisotropic particle, atomic scale, berkeley lab, crystallographic direction, daniel hellebusch, DNA, electron beam, electron microscope, gold tem mesh, grapheme, graphene liquid cells, growth, growth trajectory, jeong yong lee, jong min yuk, jungwon park, kwanpyo kim, liquid, lynn yarris, membrane, metal, michael crommie, movie, nanocrystal, nanometer scale, nanoparticle growth, ncem, paul alivisatos, peter ercius, platinum nanocrystal, protein, real-time, solution, subnanometer resolution, tem grid, transmission electron microscope, university of california

Berkeley Scientists Create Graphene Liquid Cells for Electron Microscopy Studies of Nanocrystal Formation

They won’t be coming soon to a multiplex near you, but movies showing the growth of platinum nanocrystals at the atomic-scale in real-time have blockbuster potential. A team of scientists with the Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC) Berkeley has developed a technique for encapsulating liquids of nanocrystals between layers of graphene so that chemical reactions in the liquids can be imaged with an electron microscope. With this technique, movies can be made that provide unprecedented direct observations of physical, chemical and biological phenomena that take place in liquids on the nanometer scale. (more…)

Tag Archives: solution

Nanoparticles Seen as Artificial Atoms

New Twist on Ancient Math Problem Could Improve Medicine, Microelectronics

Introducing Genome from Yahoo!, a New Solution Capitalizing on Yahoo!’s Vast Data and Designed to Significantly Improve Online Marketing Campaigns

Not Your Parents’ Chem Labs

First Atomic-Scale Real-Time Movies of Platinum Nanocrystal Growth in Liquids