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Low-energy electron diffraction (LEED) is a technique for the determination of the surface structure of single-crystalline materials by bombardment with a collimated beam of low-energy electrons (30–200 eV) [1] and observation of diffracted electrons as spots on a fluorescent screen. LEED may be used in one of two ways:
The LEED Green Building Rating System (LEED) is a program that provides third-party verification of green buildings. The LEED program rates commercial buildings, homes, neighborhoods, retail, healthcare, schools, including every phase of the respective building lifecycle, including design, construction, operations, and maintenance.
Here, this is done in a typical LEED set-up, however, in LEEM, there are complicated electron optics that allow for imaging of the resultant diffraction patterns and hence, the surface of the sample. Kinematic or elastic backscattering occurs when low energy (1-100 eV) electrons impinge on a clean, well-ordered crystalline specimen.
Starting in November, new permit applications for high-rise residential building must submit documentation to achieve LEED certification, and that requirement ratchets up to LEED Silver in 2009 and LEED Gold in 2012. There are also requirements to meet additional LEED standards, nearly equal to those for mid-size commercial buildings.
LEED has evolved since 1998 to more accurately represent and incorporate emerging green building technologies. LEED has developed building programs specific to new construction (NC), core and shell (CS), commercial interiors (CI), existing buildings (EB), neighborhood development (ND), homes (LEED for Homes), retail, schools, and healthcare.
LEED for Neighborhood Development (LEED-ND), where "LEED" stands for Leadership in Energy and Environmental Design, is a United States–based rating system that integrates the principles of smart growth, urbanism, and green building into a national system for neighborhood design. LEED certification provides independent, third-party ...
Example of inner shell ionization edge (core loss) EELS data from La 0.7 Sr 0.3 MnO 3, acquired on a scanning transmission electron microscope. There are several basic flavors of EELS, primarily classified by the geometry and by the kinetic energy of the incident electrons (typically measured in kiloelectron-volts, or keV).
For example, the IgCC is focused specifically on construction, whereas LEED covers the entire lifecycle of a building, including its operation and maintenance. Additionally, the IgCC is a model code, which means that it has the force of law in jurisdictions that adopt it, whereas LEED is a voluntary certification program that developers choose ...