Building the Microscopes of Tomorrow

The STROBE Science & Technology Center brings together imaging science experts from seven universities and partners with national labs, industry and academe to push the boundaries of imaging science capabilities and technologies, while building a diverse workforce that is prepared for 21st century careers in science and technology.

RESEARCH HIGHLIGHTS

High-fidelity imaging of highly periodic structures enabled by vortex high harmonic beams

B. Wang, et al., Optica, 10, 1245-1252, (2023).

STROBE scientists solved a major imaging challenge by demonstrating high fidelity short wavelength imaging of highly-periodic structures for the . . .

Detecting, distinguishing, and spatiotemporally tracking photogenerated charge and heat at the nanoscale

H. L. Weaver, et al., ACS Nano, 17, 19011-19021, (2023).

Since dissipative processes are ubiquitous in semiconductors, characterizing how electronic and thermal energy transduce and transport at the nanoscale is . . .

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STROBE IN THE NEWS

From circuit boards to micro thrusters, an FLC alumnus solders a remarkable path in engineering

August 27, 2024|Fort Lewis College News|

Thanks to the PEAQS program, Max Krauss (Computer Engineering, '24), got to sharpen his skills . . .

Through hands-on research, PEAQS program helps students discover their love, passion for research

August 27, 2024|Fort Lewis College News|

The Partnership for Education and the Advancement of Quantum and nanoSciences recently received its second, . . .

STROBE AWARDS

Congratulations to Laura Waller for being Awarded the Max Planck-Humboldt Medal for Outstanding Achievement in Computational Microscopy

September 10, 2024|The Max Planck Society and the Alexander von Humboldt Foundation|

Laura Waller, professor of electrical engineering and computer sciences at University of California Berkeley, . . .

Congratulations to Benjamin Hammel and Emma Nelson for receiving Poster Awards at the CU Boulder Innovation in Materials Symposium 2024

August 16, 2024|University of Colorado Boulder|

Congratulations to Benjamin Hammel for receiving the First Place Poster Award and Emma Nelson for . . .

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STROBE IN THE NEWS

From circuit boards to micro thrusters, an FLC alumnus solders a remarkable path in engineering

August 27, 2024|Fort Lewis College News|

Thanks to the PEAQS program, Max Krauss (Computer Engineering, '24), got to sharpen his skills . . .

Through hands-on research, PEAQS program helps students discover their love, passion for research

August 27, 2024|Fort Lewis College News|

The Partnership for Education and the Advancement of Quantum and nanoSciences recently received its second, . . .

More News

STROBE AWARDS

Congratulations to Laura Waller for being Awarded the Max Planck-Humboldt Medal for Outstanding Achievement in Computational Microscopy

September 10, 2024|The Max Planck Society and the Alexander von Humboldt Foundation|

Laura Waller, professor of electrical engineering and computer sciences at University of California Berkeley, . . .

Congratulations to Benjamin Hammel and Emma Nelson for receiving Poster Awards at the CU Boulder Innovation in Materials Symposium 2024

August 16, 2024|University of Colorado Boulder|

Congratulations to Benjamin Hammel for receiving the First Place Poster Award and Emma Nelson for . . .

More Awards

Speculum-free portable preterm imaging system T.

Low-density diamondlike amorphous carbon at nanost $Low-density diamondlike amorphous carbon at nanostructured metal-diamond interfaces B. McBennett, Y. Esashi, N. W. Jenkins, A. Beardo, Y. Shao, E. E. Nelson, T. H. Culman, B. Abad, M. Tanksalvala, T. D. Frazer, S. Marks, W. Chao, S. Yazdi, J. L. Knobloch, H. C. Kapteyn, M. M. Murnane, Physical Review Materials, 8, 096001, (2024). DOI: 10.1103/physrevmaterials.8.096001 Next-generation nanoelectronic, energy, and quantum technologies require increasingly stringent thermal, optical, mechanical, and electrical properties of component materials, often surpassing the limits of widely used materials such as silicon. Diamond, an ultrawide bandgap semiconductor, is a promising material for these applications because of its very high stiffness, thermal conductivity, and electron mobility. However, incorporating diamond into devices that require high-quality metal-diamond interfaces is challenging. In this work, we use a suite of electron microscopy measurements to reveal an ultrathin amorphous carbon layer that emerges at metal-diamond interfaces after electron beam lithography. Using extreme ultraviolet scatterometry, we nondestructively determine lower bounds on the layer's Young's modulus and thermal conductivity, which at >230GPa and >1.1 W/(mK) are indicative of a diamondlike form of amorphous carbon with high 𝑠⁢𝑝3 bonding. However, extreme ultraviolet coherent diffractive imaging reflectometry and energy-dispersive x-ray spectroscopy measurements indicate a low and likely inhomogeneous density in the range of 1–2g/cm3. The low density of such a stiff and conductive layer could indicate that it contains nanometer-scale voids or atomic-scale vacancies. The appearance of this unusual layer illustrates the nanofabrication challenges for diamond and highlights the need for better techniques to characterize surfaces and interfaces in nanoscale devices.$

Elucidating the role of Cr migration in Ni-Cr expo

Low-Light Phase Retrieval With Implicit Generative $Low-Light Phase Retrieval With Implicit Generative Priors R. Manekar, E. Negrini, M. Pham, D. Jacobs, J. Srivastava, S. J. Osher, J. Miao, IEEE Transactions on Image Processing, 33, 4728-4737, (2024). DOI: 10.1109/tip.2024.3445739 Phase retrieval (PR) is fundamentally important in scientific imaging and is crucial for nanoscale techniques like coherent diffractive imaging (CDI). Low radiation dose imaging is essential for applications involving radiation-sensitive samples. However, most PR methods struggle in low-dose scenarios due to high shot noise. Recent advancements in optical data acquisition setups, such as in-situ CDI, have shown promise for low-dose imaging, but they rely on a time series of measurements, making them unsuitable for single-image applications. Similarly, data-driven phase retrieval techniques are not easily adaptable to data-scarce situations. Zero-shot deep learning methods based on pre-trained and implicit generative priors have been effective in various imaging tasks but have shown limited success in PR. In this work, we propose low-dose deep image prior (LoDIP), which combines in-situ CDI with the power of implicit generative priors to address single-image low-dose phase retrieval. Quantitative evaluations demonstrate LoDIP’s superior performance in this task and its applicability to real experimental scenarios.$

Time-efficient filtering of imaging polarimetric d

Quantitative Assessment of Collagen Remodeling dur

Atomic structures of a bacteriocin targeting Gram-

CryoEM reveals oligomeric isomers of a multienzyme

Antenna-coupled infrared nanospectroscopy of intra

Morphological and mechanical characterization of a

Cryo-EM structure of a human LECT2 amyloid fibril

Analysis of Strain and Defects in Tellurium-WSe2 M $Analysis of Strain and Defects in Tellurium-WSe2 Moire Heterostructures Using Scanning Nanodiffraction B. Sari, S. E. Zeltmann, C. Zhao, P. M. Pelz, A. Javey, A. M. Minor, C. Ophus, M. C. Scott, ACS Nano, 17, 22326-22333, (2023). DOI: 10.1021/acsnano.3c04283 In recent years, there has been an increasing focus on 2D nongraphene materials that range from insulators to semiconductors to metals. As a single-elemental van der Waals semiconductor, tellurium (Te) has captivating anisotropic physical properties. Recent work demonstrated growth of ultrathin Te on WSe2 with the atomic chains of Te aligned with the armchair directions of the substrate using physical vapor deposition (PVD). In this system, a moiré superlattice is formed where micrometer-scale Te flakes sit on top of the continuous WSe2 film. Here, we determined the precise orientation of the Te flakes with respect to the substrate and detailed structure of the resulting moiré lattice by combining electron microscopy with image simulations. We directly visualized the moiré lattice using center of mass-differential phase contrast (CoM-DPC). We also investigated the local strain within the Te/WSe2 layered materials using scanning nanodiffraction techniques. There is a significant tensile strain at the edges of flakes along the direction perpendicular to the Te chain direction, which is an indication of the preferred orientation for the growth of Te on WSe2. In addition, we observed local strain relaxation regions within the Te film, specifically attributed to misfit dislocations, which we characterize as having a screw-like nature. The detailed structural analysis gives insight into the growth mechanisms and strain relaxation in this moiré heterostructure.$

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