Quantitative Chemical Analysis at the Nanoscale Using the Photothermal Induced Resonance Technique.

ABSTRACT: Photothermal induced resonance (PTIR), also known as AFM-IR, is a scanning probe technique that provides sample composition information with a lateral resolution down to 20 nm. Interest in PTIR stems from its ability to identify unknown samples at the nanoscale thanks, in first approximation, to the direct comparability of PTIR spectra with far-field infrared databases. The development of rapidly tuning quantum cascade lasers has increased the PTIR throughput considerably, making nanoscale hyperspectral imaging within a reasonable time frame possible. Consequently, a better understanding of PTIR signal generation and of the fine details of PTIR analysis has become of paramount importance for extending complex IR analysis methods developed in the far-field, e.g., for classification and hype

SUBMITTER: Ramer G 

PROVIDER: S-EPMC5841475 | biostudies-literature | 2017 Dec

REPOSITORIES: biostudies-literature