| Material / family | Start here when the requirement is… | Quote variables |
|---|
| PSL / polystyrene latex | Monodisperse particle-size references, particle-counter/optical calibration, aerosol work, or deposited wafer references. | Instrument/application, nominal size(s), form/concentration, quantity, certificate/traceability. |
| Silica / SiO₂ | Silica reference behavior, contamination-wafer work, optical/material research, or functionalized silica formulations. | Size, surface treatment/functionalization, powder vs suspension, solvent/concentration, quantity. |
| Borosilicate / glass | Powder/particle-size measurement and methods where glass material properties and available size ranges are appropriate. | Method/instrument, nominal size/range, quantity, sample preparation and documentation. |
| Fluorescent / dyed polymer | Imaging, tracking, optical method development, method visibility or research requiring a colored/fluorescent signal. | Size, color/excitation-emission, surface chemistry, dry/suspension form, concentration/quantity. |
| Functionalized / assay particles | Conjugation, binding, lateral-flow, diagnostic or assay-development workflows. | Core material, size, functional group/coating, concentration, conjugation target and assay conditions. |
| Magnetic / metallic nanoparticles | Research workflows where magnetic response, plasmonic/optical properties or specialized surface chemistry are part of the method. | Composition, size, morphology, coating/functionalization, concentration and application. |