The National Institute of Standards and Technology (NIST) seeks to fabricate custom micropillar arrays for use as reference materials in measuring phosphorus concentration in silicon via Atom Probe Tomography. This requirement is a total small business set-aside under NAICS code 541713. No specific budget amount or performance location is mentioned in the description. No non-bid or submission timelines are provided. The arrays must be pre-sharpened and directly compatible with modern atom probe instruments.