|Code||Description||Substrate||Size, mm2||Thickness, mm||Active area, mm2||Price, EUR/pc**|
AUITO-1(recommended Raman excitation wavelength 785 nm.)
| Au nanoparticles coated on ITO glass|
(all substrate surface is conductive)
Conductivity </= 50 Ohms/sq.
(recommended Raman excitation wavelength 785 nm.)
|Au nanoparticles coated on microscope slide||glass||25x76||1||25x20*||50|
* available custom size.
** 10% discount for each unit when the order quantity exceeds 20 pcs.
- A variety of substrate materials are obtainable.
- Ag nanoparticles coated on a microscope slide are available.
- Different sizes of nanoparticles are possible.
SERS substrates are prepared using laser-based technology. The typical Raman enhancement factor of SERS based on gold nanoparticles is 106-107.
Recommendations for the use of substrates:
- do not exceed 5 mW of laser average power using 50x(NA=0.5) objective during the measurements in Raman microscopy.
- use the substrates within 2 months from the date of the production.
- Raman spectroscopy
- Chemical identification
- Environment measurements
- Medical diagnostics
SEM MICROGRAPHS OF SERS SUBSTRATES
Fig. 1. a) SEM micrograph of ITO substrate coated with Au nanoparticles; b) and c) SEM images of a glass substrate coated with different size and density of Au nanoparticles.
RAMAN SPECTRA OF SERS SUBSTRATES
The comparison of Raman spectra of 2-Mercaptobenzoic acid on the ITO glass coated with Au nanoparticles (red curve) and on the ITO glass coated with a 10 nm gold film (blue curve) shown in Fig. 2a.
Fig. 2. Raman spectra of 2-Mercaptobenzoic acid on ITO substrate No. AUITO-1 (a) and glass substrate No. AUG-2 (b).
SERS substrate enhances the Raman scattering light from molecules, capable of detecting trace amounts of chemicals and identifying them based on their unique vibrational characteristics.
Measurement conditions of Raman spectra:
Sample preparation: SERS substrates were immersed in an ethanol solution of 1mM Merkaptobenzoic acid for 16 hours. Afterward, substrates were rinsed in ethanol (96%) and dried at room temperature under slow nitrogen gas flow.
Raman measurement: laser wavelength 785 nm; average power 0.9 mW; 50x objective (NA=0.5); grating 1200 l/mm; integration time 100 s.