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Electron energy loss spectroscopy (EELS) is an analytical technique that enables atomic level chemical and structural characterization of materials, using their electron energy loss spectra. The Infinita Lab network of testing labs, USA, offers the EELS test to our clients in the USA and worldwide.
Electron Energy Loss Spectroscopy (EELS) is based on the principle that high energy electrons passing through a material can lose energy by various mechanisms due to interactions with atomic nuclei or their surrounding electrons. In the EELs technique, a thin sample of the specimen is investigated in a Transmission Electron Microscope (TEM) or Scanning Transmission Electron Microscope (STEM). The energy loss of transmitted electrons is measured and analysed by electron spectroscopy. The energy loss spectra yields information for atomic-level chemical and structural characterization. The EELS technique can identify atomic species, their chemical bonding, oxidation states, electronic properties in valence and conduction bands, as well material surface properties. It is also used with electron tomography, to provide nano-scale, spatial mapping of elements and oxidation states.
Common Uses of Electron Energy Loss Spectroscopy (EELS)
Advantages of Electron Energy Loss Spectroscopy (EELS)
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The EELS technique is used to identify atomic species, their chemical bonding, oxidation states, electronic properties in valence and conduction bands, as well material surface properties. It is also used with electron tomography, to provide nano-scale, spatial mapping of elements and oxidation states.
The EDS spectrum contains sharp peaks that are characteristic X-rays emitted by the atoms of the different elements present in the specimen. In EELS, the energy loss of transmitted electrons is measured and analyzed by electron spectroscopy.
EELS testing requires precision tools and experienced technicians to get the best results. Infinita Lab’s network of testing labs offers EELS test to our clients in the USA and worldwide.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
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