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Nano-TAB Extensions­--- Nano-TAB extends the ISA-TAB specification for the study file by redefining the concept of a sample and adding a new field called material file to reference the material files that contain description of the material samples.

Material File

Description

(1) The material file describes the composition of the material formulation and is not included in the ISA-TAB specification.  The material file is an important file that is designed to allow for nanomaterial comparison across nanotechnology resources. 

(2) An investigation typically involves the preparation of multiple materials that are tested.  These materials could be of the same chemical composition (same type and amount of chemical components in the sample) or different chemical compositions. Materials having the same chemical composition should be described using one material file. Materials of different chemical composition should be described separately using multiple materials files.

File Format---The material file format leverages a vertical-based spreadsheet format with columns representing multiple values.  TABLE 4 shows an the example subset of the material file..

Nano-TAB Extensions---Since the material file does not exist in the ISA-TAB specification, the entire file is considered an extension.  This file is described in detail in the Appendix.