Advanced Light Source的动态

I am happy to announce the publication of my most recent article in Wiley's Advanced Functional Materials entitled "Detection and Signal Processing for Near-Field Nanoscale Fourier Transform Infrared Spectroscopy." The theoretical (and experimental) work meticulously steps through the detection and signal processing steps that occur in the background to enable scattering-type #nanoscale-#FTIR. Each processing step is modeled as a linear operator, and all calculations are shown (especially if you dive into the SI). An algebraic expression is derived that can be easily used to approximate the sample's local extinction coefficient by using the real and imaginary parts of the nano-FTIR spectrum as inputs. The algebraic model is valid in the weak oscillator limit and matches ATR-FTIR absorption data better than the phase, imaginary part, or ratio of reflection coefficients. My collaborators (Hans Bechtel and Robert Kostecki) and I hope the article will be of benefit to new users and seasoned practitioners alike, who want to have a deeper understanding of the technique, and/or want a springboard for developing additional rigorous #nanoscale-#FTIR data interpretation approaches. The work was a collaboration between Berkeley Lab / Baylor University Baylor Chemistry & Biochemistry Department / Advanced Light Source #AFM #sSNOM #nanoFTIR #NanoOptics #MaterialsCharacterization #IR #MaterialsScience