Mission-driven science and technology advancing the security and well-being of the nation
Nuclear science is a foundational discipline at LLNL and has undergone a resurgence in the past several years. The Nuclear and Chemical Sciences Division, NACS, brings together expertise in the fields of nuclear, radio- and analytical chemistry, nuclear experimental and theoretical physics and particle physics, to support LLNL's programmatic missions including stockpile stewardship, nuclear and chemical forensics, nuclear safeguards, non-proliferation and response. Additionally, NACS scientists are discovering new elements, chasing elusive new particles and answering some of the most fundamental scientific questions about dark matter, neutrino physics, nucleosynthesis and the origins of the universe.
August 23, 2016
A team of Lawrence Livermore National Laboratory researchers has demonstrated the 3D printing of shape-shifting structures that can fold or unfold to reshape themselves when exposed to heat or electricity. The micro-architected structures were fabricated from a conductive, environmentally responsive polymer ink developed at the Lab.
In an article published recently by the journal Scientific Reports (link is external), Lab scientists and engineers revealed a strategy for creating boxes, spirals and spheres from shape memory polymers (SMPs), bio-based "smart" materials that exhibit shape-changes when resistively heated or when exposed to the appropriate temperature.
While the approach of using responsive materials in 3D printing, often known as "4D printing," is not new, LLNL researchers are the first to combine the process of 3D printing and subsequent folding (via origami methods) with conductive smart materials to build complex structures.
August 16, 2016
A new Transmission Electron Microscope (TEM) installed at the Lab earlier this year is giving LLNL researchers a clearer look at the atomic level of structures than they've had before.
The Titan 80-300 TEM, manufactured by FEI Company, was installed in December and brings an expanded capability to the existing transmission electron microscope the Lab has had for about 20 years, according to LLNL staff scientist Joe McKeown. Among the improvements include a high-angle annular dark field (HAADF) detector for scanning transmission electron microscopy (STEM), which allows for Z-contrast imaging due to enhanced scattering from high atomic number elements, and a low-voltage mode for analyzing polymers and biological samples that may be more sensitive to high-energy electrons.
"With the dark field detector, heavier elements appear brighter in contrast, so we can more easily and quickly perform both structural and compositional analysis of microstructures," McKeown said.
August 15, 2016
The 2016 R&D 100 awards, sponsored by the trade journal R&D Magazine, are given annually for the top 100 industrial inventions worldwide and are sometimes called the "Oscars of invention."
Three technologies developed with the expertise of PLS researchers have been tapped as finalists for the awards:
The GLO Transparent Ceramic Scintillator: This instrument dramatically increases high-energy, or mega-electron-volt, radiography throughput by providing seven times faster imaging than glass scintillators and decreases the X-ray dose required to obtain detailed imagery.
The Polyelectrolyte Enabled Liftoff (PEEL): This technology is a robust, scalable method of fabricating freestanding polymer films that are larger, stronger and thinner than what conventional methods can produce.
Solution-Grown Crystals for High-Energy Neutron Detection: This technology is a method for growing large-scale, economical stilbene crystals capable of efficiently distinguishing neutrons from gamma rays without the toxicity, flammability and handling difficulties that commercial liquid scintillators present.
July 8, 2016
The Lawrence Livermore National Laboratory (LLNL) student internship program is designed to allow students to engage in work-study employment opportunities in relevant science, technology, engineering, mathematics (STEM) and administrative fields during the summer academic break. This year, LLNL expects to welcome more than 900 students from universities nationwide and around the world.
Erica West is working with several mentors from the Computational Chemistry and Materials Science Summer School (CCMS) running classical molecular dynamics simulations using the Vienna Ab Initio Simulation Package (VASP) model computer program.
"I am learning some amazing science from meeting with my mentors, attending lectures and discussing science with fellow students. The most interesting thing, at the moment, is learning how to manipulate the molecular dynamics simulation model, VASP. Learning how to properly use VASP has deepened my fundamental understanding of material science and chemistry."
May 31, 2016
The 2016 LLNL Lab-Corps cohort of researchers including PLS's Yongqin Jiao and Michael Stadermann recently returned from in-depth entrepreneurial training at the National Renewable Energy Laboratory in Denver.
An eight-week program that started in early March, the Lab-Corps national training teaches the process of moving high-impact, real-world technologies into the private sector.
"Lab-Corps has demystified the process of building a company for me," Stadermann added. "My most significant learning experience was the application of the scientific method to a non-science problem: We had to formulate hypotheses about our business, customers, value, partners, and then validate them through interviews.
May 17, 2016
Lawrence Livermore National Laboratory chemist Dawn Shaughnessy has been named No. 9 on Fast Company's Top 100 Most Creative People in Business for 2016.
Shaughnessy is the principal investigator of the Heavy Element Group, where she has worked as a nuclear and radiochemist since 2002. In December 2015, the International Union of Pure and Applied Chemistry added three new entries to the periodic table of elements that had been synthesized by a team of researchers led by Shaughnessy. Partnering with the Joint Institute for Nuclear Research in Russia, the group has discovered five new "superheavy" elements since 2004, bearing the atomic numbers 114 to 118 with element 116 named after the Laboratory as Livermorium.