SERS Substrate 'RandaS'

Item Code: SERS-AG-35-1
Preliminary
Product specifications are subject to change, delivery time is less predictable.
Full production
Product specifications are stable. Delivery time is predictable.
Replacement in due course
The product is to be replaced. Please contact us regarding forseeable changes
Not for new designs
The product is to be discontinued. Please contact us for production plans.
Orders still accepted, deliveries still possible
The product will be discontinued soon but we still have some stock of finished items or neccessary components.
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Discontinued
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Available (in stock) Not in stock

Description

The 'RandaS' SERS Substrate

Small form factor and very cost efficient SERS substrates. RandaS are vacuum packed separately in 1.5 ml microcentrifuge tubes. These substrates are used in numerous analytical applications from trace analysis to medical diagnostics. The form factor and packing are ideal for immersion and analysis of liquid (buffered) samples.
The active area is the same for the complete SERS substrates made by AtoID, just form factor and coatings are different. Stochastic nanostructure features fragments from tens of nanometers to few microns and such variety meets resonance criteria for many different vibrational modes of molecules. That is the reason why you will always get a high SERS activity with a variety of analytes if only the molecules are well adsorbed.

Electric Conductivity

Another useful feature is that the active area is electrically conductive. This allows you to use an electric field to polarize the molecules having poles of positive and negative charge and bring them closer to the substrate. The surface resistance is approx. 1 Ohm/mm.

Substrate Design

The substrate is made from silicate glass, which itself is a weak Raman scatterer. On the other hand, glass is extremely cost-effective and stable, which makes this substrate suitable for routine analysis in the chemical industry and medical diagnostics. The substrate material is what makes it suitable for all ways of use: immersion, powder or gas.
We specify 2 months shelf life, nonetheless, we have used substrates, which were produced 6 to 12 months prior to use and have not noticed any significant degradation.

Minimum Order: 50 pcs.


Last edited on: 10 November 2022
Parameter Minimum Value Typical Value Maximum Value
 Overall size, mm - 12.5x5x1 -
 Active area, mm - 3x5 -
 Excitation wavelengths, nm - 442 to NIR (tested) -
 Coating - silver -
 Substrate - silicate glass -
 Shelf Life - 6 months -
 Typical lead time - 2 weeks -
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