Abstract
An efficient and low-cost spectroscopic tool, photoacoustic spectroscopy (PAS), is described. Although this tool is suitable for all levels of chemistry and physics laboratories, it is particularly useful in an undergraduate laboratory. PAS is an excellent technique for studying the optical absorption spectra of opaque and highly light-scattering substances such as nanomaterials. It also has the capability of obtaining the depth profiles of crystals and thin films. Unlike in the conventional absorption and fluorescence spectroscopic techniques, PAS monitors the pressure changes in the gas medium surrounding the sample owing to the heat generated as a result of nonradiative deexcitation following optical absorption. The technique virtually requires no sample preparation. A few examples to demonstrate the usefulness of this tool are given. Fundamental knowledge on spectroscopic techniques like PAS will be an asset to those students who opt for graduate studies or those students who go on to a career in industry.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
