What is DRS in chemistry?
Abstract. Differential reflectance spectroscopy (DRS) is a surface analytical technique. It uses ultraviolet (UV), visible, or infrared (IR) light as a probing medium. The interaction of light with “strongly absorbing materials”, such as metals, alloys, semiconductors, etc.
What is the difference between UV VIS and UV DRS?
UV-VIS most often refers to absorption spectroscopy, measured by transmission, whereas DRS specifically refers to diffuse reflection spectroscopy. Normally, the former is used for solutions/suspensions or thin films, whereas the latter is used for solids – optically rough films or powders.
What is IR reflection?
reflected infrared In remote sensing, infrared which is solar-generated electromagnetic radiation that has been reflected from an object. Characteristically, reflected infrared radiation has a wavelength between 0.7 μm and 3 μm and is therefore near-infrared.
What is principle of UV spectroscopy?
The Principle of UV-Visible Spectroscopy is based on the absorption of ultraviolet light or visible light by chemical compounds, which results in the production of distinct spectra. Spectroscopy is based on the interaction between light and matter.
What is UV spectroscopy in chemistry?
UV-Vis spectroscopy is an analytical technique that measures the amount of discrete wavelengths of UV or visible light that are absorbed by or transmitted through a sample in comparison to a reference or blank sample.
What is diffuse transmittance?
Note: In a frosted incandescent light bulb, the diffuse transmittance is approximately the ratio of (a) the total optical power generarted by the filament to (b) the total optical power exiting from the bulb. 2. The transmittance measured with diffusely incident lightwaves.
What is diffuse transmission?
Diffuse transmission is when light rays are widely spread, useful when we want to obscure the light source and produce a uniform appearance of light on the transmitting surface. Example: Inside-frosted glass.
What type of technique is FTIR spectroscopy?
Fourier transform infrared spectroscopy (FTIR) is a technique which is used to obtain infrared spectrum of absorption, emission, and photoconductivity of solid, liquid, and gas. It is used to detect different functional groups in PHB. FTIR spectrum is recorded between 4000 and 400 cm−1.