Excellent for use with any application that requires a NIST traceable size standard with a very narrow standard deviation.
Product Detail
Thermo Scientific NanosphereTM Size Standards are highly uniform polystyrene spheres calibrated within billionths of a meter (nanometers) with NIST traceable methodology. One nanometer is 0.001 micrometer (µm) or 10 Angstroms. Nanosphere size standards are ideal for the calibration of electron and atomic force microscopes. They are also used in laser light scattering studies and colloidal systems research. The 20 to 900 nm range of spheres is convenient for checking the sizes of bacteria, viruses, ribosomes and sub-cellular components.
They are available as uniform polymer spheres in a range of discrete sizes from 20 to 900 nanometers (nm). The spherical diameters are calibrated with linear dimensions transferred from NIST by methods developed at Thermo Fisher Scientific. Spheres are used instead of irregularly shaped particles to minimize the response of analytical systems to shape effects. The standards are packaged as aqueous suspensions in 15 milliliter (mL) dropper-tipped bottles. The concentrations are optimized for ease of dispersion and colloidal stability. The spheres have a density of 1.05 g/cm3 and an index of refraction of 1.59 @ 589 nm (25°C).
Each package contains a Certificate of Calibration and Traceability to NIST which includes a description of the calibration method and its uncertainty, and a table of chemical and physical properties. A Material Safety Data Sheet, with handling and disposal instructions, is also included. Packages are lot-numbered for convenient technical service and support after the sale.
Thermo Fisher Scientific has its own engineering, production and metrology facilities for better quality control and response to customer needs. In addition to this line of polymer size standards, we also offer calibration standards in silica and glass materials. Ask our technical service department for information about specific applications or other product needs not listed here.