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NanoIR Spectroscopy & Imaging: Recent Developments and Applications

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NanoIR through Peak Force Infrared (PFIR) Microscopy

Presented by Xiaoji Xu, Ph.D., Lehigh University (September 01, 2021)

_{PRESENTATION HIGHLIGHTS}

[00:00:47] Review of Abbe's diffaction limit, photothermal AFM-IR, and PeakForce Tapping
[00:09:05] Introduction to peak force infrared microscopy (PFIR)
[00:14:25] PFIR for hard/rough samples
[00:17:17] PFIR for soft samples
[00:18:43] PFIR for aerosols
[00:21:00] Other applications of PFIR
[00:22:32] Specialized PFIR: multi-pulse PFIR, PFIR with pump/probe geometry
[00:25:20] Specialized PFIR: Liquid-phase PFIR
[00:31:48] Summary of PFIR capabilities

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Presented by Dmitry Kurouski, Ph.D., Texas A&M University (September 01, 2021)

_{PRESENTATION HIGHLIGHTS}

[00:01:06] Why use both raman and IR spectroscopy for structural characterization?
[00:03:12] Why IR reveals a variety of spectra unavailable via raman spectroscopy
[00:05:34] How nano-raman and nanoIR overcome traditional spatial resolution limits
[00:07:56] Demonstrating the complementarity of TERS and AFM-IR on viruses
[00:12:30] Observing amino acid composition & secondary structure of viral particles
[00:13:14] Structural analysis of oligomers as the fundamental cause of Parkinson's disease
[00:16:56] Understanding how the secondary structural organization and surface structure information of populations of oligomers change

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Presented by Cassandra Phillips, Ph.D., Application Scientist, Bruker (September 01, 2021)

_{PRESENTATION HIGHLIGHTS}

[00:00:20] Why surface sensitivity matters
[00:01:43] Volume probing vs.surface probing
[00:03:15] PMMA wedge demonstration sample
[00:05:00] Demo: Resonance-enhanced mode
[00:06:00] Demo: Surface sensitive mode setup and data acquisition
[00:10:30] Demo: Finding the position at which the infrared signal saturates
[00:11:05] Demo: Generating and interpreting the height image
[00:13:12] Demo: Analyzing a new dataset

Are there any hardware updates needed to scan in surface sensitivity mode if you already have an Anasys nanoIR platform?

Is there a special probe for surface sensitivity mode?

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▶ Watch On-Demand | 15 Minutes

Presented by Cassandra Phillips, Ph.D., Application Scientist, Bruker (September 01, 2021)

_{PRESENTATION HIGHLIGHTS}

[00:00:48] Live setup and real-time scan with Bruker's new AFM-IR platform and Nanoscope 6 controller
[00:03:55] Demo: Switching the laser wavenumber and interpreting signal inversion
[00:05:00] Demo: Switching from sample scanning to tip scanning information
[00:06:10] Demo: PeakForce QNM in air using infrared imaging instrumentation/configuration
[00:09:57] Demo: Achieving unmatched lateral resolution in a PS-b-PMMA aggregate sample

How do you select the right cantilever for this new [tapping mode] configuration?

Are nanometers at 80 nm to 200 nm in diameter difficult o measure with this platform? How do you affix them onto a wafer?

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