New IR imaging modalities for cancer detection and for intra-cell chemical mapping with a sub-diffraction mid-IR s-SNOM
File(s)c5fd00150a.pdf (3.91 MB)
Published version
Author(s)
Type
Journal Article
Abstract
We present two new modalities for generating chemical maps. Both are mid-IR based and aimed at the biomedical community, but they differ substantially in their technological readiness. The first, so-called "Digistain", is a technologically mature "locked down" way of acquiring diffraction-limited chemical images of human cancer biopsy tissue. Although it is less flexible than conventional methods of acquiring IR images, this is an intentional, and key, design feature. It allows it to be used, on a routine basis, by clinical personnel themselves. It is in the process of a full clinical evaluation and the philosophy behind the approach is discussed. The second modality is a very new, probe-based "s-SNOM", which we are developing in conjunction with a new family of tunable "Quantum Cascade Laser" (QCL) diode lasers. Although in its infancy, this instrument can already deliver ultra-detailed chemical images whose spatial resolutions beat the normal diffraction limit by a factor of ∼1000. This is easily enough to generate chemical maps of the insides of single cells for the first time, and a range of new possible scientific applications are explored.
Date Issued
2016-06-01
Date Acceptance
2015-11-30
Citation
Faraday Discussions, 2016, 187, pp.539-553
ISSN
1364-5498
Publisher
Royal Society of Chemistry
Start Page
539
End Page
553
Journal / Book Title
Faraday Discussions
Volume
187
Copyright Statement
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
License URL
Sponsor
Engineering & Physical Science Research Council (E
Grant Number
EP/K503733/1
Subjects
Chemical Physics
0306 Physical Chemistry (Incl. Structural)
0904 Chemical Engineering
Publication Status
Published
Date Publish Online
2015-11-30