Hyperspectral PiFM studies of source rock clearly and powerfully demonstrate the technique's ability to distinguish between inorganic and organic components in geologic mixtures. The differentiation between materials even extends to subclassifications of organics: aliphatic vs. aromatic REF: Eichmann, S., Nowak, D., Jacobi, D., & Burnham, N. (2018). Nanoscale Hyperspectral Characterization of Source Rock in Unconventional Reservoirs using Photo-Induced Force Microscopy. Microscopy and Microanalysis, 24(S1), 1040-1041.

Nanoscale Chemical Composition of Source Rock

Resolving the Nanoscale Chemical Composition of Source Rock using Hyperspectral Photo-Induced Force Microscopy Source rock or shale is a conglomeration of inorganic minerals –  e.g,  silicates and carbonates – interspersed with organic matter. Distinguishing the organic and inorganic phases may explain how nanoscale properties influence the properties of bulk rock. While topographic information (a) offers […] Read more

IR Spectra Replicated by PiFM Spectra

Agreement Between PiFM and Conventional IR Spectra PiFM spectra generally replicate conventional IR spectra recorded from bulk samples, shown in this example of polyethersulfone (PES). Occasionally, slight shifts in peak wavenumber and amplitude are observed in PiFM spectra, arising from the extreme sensitivity of PiFM to localized populations of molecules. One strength of the PiFM […] Read more

PiFM image at 1469 1/cm that identifies the islands as asphaltene, highlighting the sensitivity of PiFM at distinguishing between similar chemical species.

Distinguishing Subtle Chemical Variants

The chemical mapping capability of PiFM is demonstrated in an asphalt sample containing multiple related components. Note in the accompanying spectra that the signal strength for maltene is lower than asphaltene except at ~1501 cm-1 (shown in dotted circles on both PiFM and FTIR spectra). This small difference is easy to overlook until rendered in […] Read more

PiFM Mapping of Silver Nanowires in Transparent Conductors

Mapping Silver Nanowires in Transparent Conductors

These transparent conductors are composed of silver nanowires embedded in clear plastic. AFM topography (left) displays those nanowires that contribute to surface morphology. However, buried nanowires do not appear in topographic images. PiFM imaging (right) does reveal the placement of embedded nanowires by taking advantage of the enhancement of the overlying acrylate polymer signal (1745cm-1) […] Read more

A single self-assembled icosahedral protein cage imaged via PiFM, 20 nm at 1666 1/cm.

Single Self-assembled Icosahedral Protein Cage

Self-assembling proteins are candidates as building blocks for “smart” biomaterials that can potentially exploit the rich structural and functional properties of proteins. This has led to the design of new self-assembling protein structures such as these icosahedral protein cages. Since icosahedral protein cages can encapsulate large volumes, they are often used for vaccine design and […] Read more

PiFM image of PTQ10: IDIC blend films with thermal annealing (TA) treatment.

Nature Communications Publishes PiFM Image of PSC

A new PiFM application paper showing FTIR spectra, PiFM and PiFM+topography images of a polymer solar cell (PSC) with thermal annealing treatment was published in “Nature Communications” by Chenkai Sun, Zhi-Guo Zhang and Yongfang Li, “A low cost and high performance polymer donor material for polymer solar cells.” (doi:10.1038/s41467-018-03207-x) PiFM measurements were taken by William Morrison from Molecular […] Read more

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Presenting Video Shorts from the Applications Lab

Episode 1: Nanoscale Silicon Strain Measurements – Silicon Oxide Stress Measurements.  Photo-induced Force Microscopy – Series – PiFM @ Work presents the first in a series of video shorts from the Applications Lab at Molecular Vista. Episode 1: Nanoscale Silicon Strain Measurements explores silicon oxide stress using the Vista-IR microscope. Please subscribe to our Molecular Vista […] Read more

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