Standoff Detection using a Spatial Heterodyne Raman Spectrometer
Demonstrated that the technique works in the visible, and provides high resolution (6 cm-1) Raman spectra with a large spectral range. Much higher resolution is possible. ? Demonstrated the wide-area capability without loss of resolution and minimal loss of intensity. ? Demonstrated with pulsed laser and gated detection for ambient light discrimination. ? Demonstrated standoff capability with and without a telescope. ? Pointed out some key issues that still need to be addressed including stability of optical mounts, quality of optics, anti-Stokes overlap, and the need for excellent bandpass filtering.
Getting accurate IR spectra on monolayer of molecules
April 18th 2024Creating uniform and repeatable monolayers is incredibly important for both scientific pursuits as well as the manufacturing of products in semiconductor, biotechnology, and. other industries. However, measuring monolayers and functionalized surfaces directly is. difficult, and many rely on a variety of characterization techniques that when used together can provide some degree of confidence. By combining non-contact atomic force microscopy (AFM) and IR spectroscopy, IR PiFM provides sensitive and accurate analysis of sub-monolayer of molecules without the concern of tip-sample cross contamination. Dr. Sung Park, Molecular Vista, joined Spectroscopy to provide insights on how IR PiFM can acquire IR signature of monolayer films due to its unique implementation.
Single Cell and Microplastic Analysis by ICP-MS with Automated Micro-Flow Sample Introduction
April 25th 2024Single cell ICP-MS (scICP-MS) is increasingly seen as a powerful and fast tool for the measurement of elements in individual cells, mainly due to the high sensitivity and selectivity of ICP-MS. Analysis is performed in the same way as single nanoparticle (spICP-MS) analysis, which has become a well-established technique for the analysis of nanoparticles and particles.
