What Substrates are Used for Raman Spectroscopy?

university wafer substrates

Helping Researchers With Raman Spectroscopy Substrate Needs

A Phd requested a quote on the following:

I am interested in your quartz wafers, specifically those with 0.35mm thickness, for Raman spectroscopy applications. Do you have Raman spectra available for these wafers? If so I would appreciate it if you would send those to me.

Reference #221172 for specs and pricing.

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What is Raman Spectra?

Raman spectra are graphs that show the intensity of Raman scattering as a function of the energy or wavelength of the scattered light. They provide information about the vibrational and rotational modes of molecules in a sample, which can be used to identify and characterize chemical compounds. Raman spectra are typically obtained by illuminating a sample with a laser and measuring the inelastic scattering of photons using a spectrometer. The resulting spectrum contains peaks at specific energies or wavelengths, corresponding to the vibrational modes of the molecules in the sample. Each peak in the spectrum is associated with a specific vibrational mode, which can be used to identify the molecular structure of the sample. Raman spectra are a powerful tool for chemical analysis and are used in a wide range of applications in fields such as materials science, chemistry, biology, and medicine.



What is Raman Spectroscopy?

Raman spectroscopy is a spectroscopic technique that involves the interaction of light with matter to provide information about vibrational and rotational modes of molecules. It measures the inelastic scattering of photons by a sample, resulting in a Raman spectrum that can be used to identify and characterize chemical compounds.

How are Silicon Substrates Used With Raman Spectroscopy?

Silicon is a common substrate material in Raman spectroscopy because it is optically transparent and has a low Raman scattering cross-section, which minimizes background noise in the Raman spectra. Additionally, silicon substrates are often coated with a thin layer of silicon dioxide (SiO2), which provides a smooth and flat surface for the sample to be analyzed. The SiO2 layer also enhances the Raman signal by creating a surface-enhanced Raman scattering (SERS) effect.

What other Substrates Work Well with Raman Spectroscopy?

The choice of substrate material for Raman spectroscopy depends on the nature of the sample and the experimental conditions. Silicon is a commonly used substrate for Raman spectroscopy due to its low Raman scattering cross-section and high optical transparency. Other materials such as glass, quartz, and sapphire can also be used as substrates, depending on the specific application. The thickness and roughness of the substrate can also affect the Raman signal intensity, so it is important to choose a substrate with a suitable thickness and surface quality. In some cases, special substrates, such as those with nanostructured surfaces, can be used to enhance the Raman signal through surface-enhanced Raman scattering (SERS). Ultimately, the choice of substrate material and specifications should be optimized for the specific sample and experimental conditions to obtain the best results.

What are Raman Spectrometer Certified Reference Standard?

Raman spectrometer certified reference standards are high-quality samples that have been extensively characterized and certified for use in calibrating and validating Raman spectrometers. These standards are typically used to ensure that Raman instruments are working accurately and producing consistent results over time.

Certified reference standards for Raman spectroscopy can include a range of materials, such as inorganic compounds, organic compounds, and polymers. They are typically characterized using multiple analytical techniques, such as X-ray diffraction, infrared spectroscopy, and thermal analysis, to ensure their purity and structural integrity. The standards are then analyzed using a Raman spectrometer under controlled conditions to establish their Raman spectra and validate the performance of the instrument.

Raman spectrometer certified reference standards are important for ensuring the accuracy and reliability of Raman spectroscopy measurements, and are used in a wide range of applications, including pharmaceuticals, biomedical research, forensics, and materials science.

Raman Spectrometer Certified Reference Standard

A government researcher asked for the following:

I am looking for a raman spectrometer certified reference standard.  I prefer a Si wafer.  Do you have any that would suffice and are certified for QA purposes?

Refrence #225404 for specs and pricing.

What is a Raman Spectrometer?

A Raman spectrometer is an instrument that uses Raman spectroscopy to analyze the vibrational and rotational modes of molecules in a sample. It works by illuminating a sample with a laser and measuring the inelastic scattering of photons as the laser light interacts with the sample. The scattered photons are then collected and analyzed using a spectrometer to generate a Raman spectrum, which provides information about the chemical composition and molecular structure of the sample.

A Raman spectrometer typically consists of several components, including a laser source, a sample holder, a microscope or other optics for focusing the laser light onto the sample, and a spectrometer for collecting and analyzing the scattered photons. Raman spectrometers can be configured in a variety of ways, depending on the specific application and sample requirements.

Raman spectrometers are widely used in a range of fields, including materials science, chemistry, biology, and medicine, for applications such as chemical analysis, quality control, and characterization of materials. They are a powerful analytical tool that can provide detailed information about the chemical and structural properties of a wide range of materials.