# Stanford Unveils New Microscope for Label-Free Live Cell Imaging

> Stanford University researchers have developed Interferometric Image Scanning Microscopy (iISM), a label-free system capable of approximately 120 nanometer resolution for observing living cells.

By PrimaryBrief newsroom · Published 2026-10-17T20:51:19.293194Z
Canonical: https://primarybrief.com/article/stanford-unveils-new-microscope-for-label-free-live-cell-imaging-c8337d53

Stanford University researchers have developed a novel imaging system, Interferometric Image Scanning Microscopy (iISM), that achieves approximately 120 nanometer resolution for living cells without the need for chemical labels [1][4]. The findings were detailed in *Light: Science & Applications* in February 2026 [2][4]. This breakthrough allows scientists to observe the intricate structures and movements within cells for extended periods without damaging them [1][3].

The iISM system represents a significant step forward in biological imaging. It provides an unprecedented view into cellular processes, which could lead to new discoveries in understanding diseases, developing drugs, and exploring the complex relationships between organisms [3].

## What the Records Show
The iISM system combines interferometric scattering microscopy (iSCAT) with concepts derived from next-generation confocal microscopes [1][4]. One laser illuminates the cells, while a second laser amplifies the weak scattered signals through interference [1]. Unlike traditional confocal microscopes that use a pinhole and single detector, iISM employs a camera-based array detector [1][2]. This detector captures multiple views of the same region, which are then computationally merged to enhance sharpness, contrast, depth information, and precision [1][5]. This method results in images with about 120 nanometer lateral resolution [1][4].

A key advantage of iISM is its "label-free" approach, meaning it does not require fluorescent tags or dyes that can interfere with cell function or be toxic [2][3][4]. The system uses substantially less illumination power, reducing the risk of photodamage and allowing for longer observation times of cellular structures [1][4]. The research was conducted by Nobel laureate W.E. Moerner, a professor of chemistry and applied physics at Stanford University, and postdoctoral scholar Michelle Küppers [2][3]. The system is also designed to be compatible with existing commercial confocal platforms [4][6].

## Timeline
The research detailing Interferometric Image Scanning Microscopy (iISM) was published in *Light: Science & Applications* on February 27, 2026 [4]. Stanford University released news reports about the development in early March 2026 [3]. Further details on the system's capabilities and ongoing applications were published in October 2026 [1].

## What Has Changed
With iISM, researchers can visualize intracellular structures like the endoplasmic reticulum, mitochondria, lysosomes, and vesicles, and observe their dynamic movements and rearrangements within living cells without fluorescent labels [2][4]. The technology is being applied to study interactions among plant cells, fungi, and bacteria, and to investigate how cancer drugs enter cells [1][3][5]. A future project plans to examine how red blood cells change shape during malaria infection [1][3][5]. Michelle Küppers noted that the system is not intended to replace fluorescence microscopy, but rather to complement it by providing label-free context and dynamics [1][3].

## Public Statements
W.E. Moerner stated that the microscope "provides a fantastic new view into the cell, where you can see the tiny structures and machines in the cell moving, changing, and interacting without having to add fluorescence to observe them" [3]. Küppers added that iISM has "broad applications" and expressed hope that "the life science community will be well served by it, leading to many new discoveries" [3].

## What We Could Not Confirm
The exact dates for widespread commercial availability or integration of iISM into existing laboratory setups could not be confirmed.

## Evidence cited
1. Stanford’s new microscope reveals living cells like never before (sciencedaily.com) — https://www.sciencedaily.com/releases/2026/10/261015073231.htm
2. New microscope reveals living cells in unprecedented detail (eurekalert.org) — https://eurekalert.org/news-releases/1036683
3. New microscope reveals living cells in unprecedented detail (stanford.edu) — https://news.stanford.edu/2026/03/02/new-microscope-reveals-living-cells-unprecedented-detail/
4. Interferometric image scanning microscopy for label-free imaging at 120 nm lateral resolution inside live cells - PubMed (nih.gov) — https://pubmed.ncbi.nlm.nih.gov/41748565/
5. iISM Microscope: Stanford's Breakthrough Reveals Living Cells at 120nm Without Labels (youtube.com) — https://www.youtube.com/watch?v=J9H_5zUBlQ8
6. Interferometric Image Scanning Microscopy (iISM): New Microscope Reveals Living Cells (distilinfo.com) — https://distilinfo.com/stories/interferometric-image-scanning-microscopy-iism-new-microscope-reveals-living-cells.html
7. Stanford University: iISM Microscope sees living cells at 120 nm resolution without fluorescence, revolutionizing cancer, microbe, and other research. (academicjobs.com) — https://academicjobs.com/news/stanford-university-iism-microscope-sees-living-cells-at-120-nm-resolution-without-fluorescence-revolutionizing-cancer-microbe-and-other-research
8. New microscope reveals living cells in unprecedented detail (stanford.edu) — https://news.stanford.edu/2026/03/02/new-microscope-reveals-living-cells-unprecedented-detail/#:~:text=This%20new%20%E2%80%9Clabel%2Dfree%E2%80%9D%20technology,as%20pathogens%20or%20drugs
9. Microscope Reveals Living Cells Without Labels (photonics.com) — https://www.photonics.com/Articles/Microscope_Reveals_Living_Cells_Without_Labels/1
10. Interferometric Image Scanning Microscopy for Label-Free High-Resolution Imaging of Live Cells | Stanford OTL (stanford.edu) — https://otl.stanford.edu/technologies/s26-054
11. New microscope from Stanford University reveals living cells in unprecedented detail - Hübner Photonics (hubner-photonics.com) — https://www.hubner-photonics.com/news/new-microscope-from-stanford-university-reveals-living-cells-in-unprecedented-detail/
12. Stanford's iISM Microscope: A Deep Dive into Label-Free Live Cell Imaging (youtube.com) — https://www.youtube.com/watch?v=F07_rN2-u3s
13. W.E. Moerner wins 2014 Nobel Prize in Chemistry (stanford.edu) — https://news.stanford.edu/2014/10/08/moerner-nobel-chemistry-100814/
14. William E. Moerner – Facts (nobelprize.org) — https://www.nobelprize.org/prizes/chemistry/2014/moerner/facts/
15. William Moerner - Wikipedia (wikipedia.org) — https://en.wikipedia.org/wiki/William_Moerner
16. W.E. Moerner | Biography & Facts | Britannica (britannica.com) — https://www.britannica.com/biography/W-E-Moerner
17. W. E. Moerner | Department of Chemistry (stanford.edu) — https://chemistry.stanford.edu/people/w-e-moerner
18. Interferometric image scanning microscopy for label-free imaging at 120 nm lateral resolution inside live cells | bioRxiv (biorxiv.org) — https://www.biorxiv.org/content/10.1101/2025.09.21.663185v1