Sanghoon Song
YOU?
Author Swipe
View article: Terahertz-field activation of polar skyrons
Terahertz-field activation of polar skyrons Open
View article: Determining the nanostructure of polymer foams using 3D ptycho-tomography for inertial fusion energy applications
Determining the nanostructure of polymer foams using 3D ptycho-tomography for inertial fusion energy applications Open
Polymer foams play a critical role in contemporary inertial fusion energy (IFE) target designs by enhancing energy yield and optimizing implosion dynamics. However, the lack of high-resolution characterization of the nanostructure of these…
View article: Nanoscale Ultrafast Lattice Modulation with Hard X-ray Free Electron Laser
Nanoscale Ultrafast Lattice Modulation with Hard X-ray Free Electron Laser Open
Understanding and controlling microscopic dynamics across spatial and temporal scales has driven major progress in science and technology over the past several decades. While ultrafast laser-based techniques have enabled probing nanoscale …
View article: Structure and ultrafast dynamics of tri-nuclear Ag-/Tl–Pt2POP4 complexes in solution
Structure and ultrafast dynamics of tri-nuclear Ag-/Tl–Pt2POP4 complexes in solution Open
The energetics and dynamics of ion assembly in solution has broad influence in nanomaterials and inorganic synthesis. To investigate the fundamental processes involved, we present a time-resolved x-ray solution scattering (TR-XSS) study of…
View article: Nanoscale Ultrafast Lattice Modulation with Hard X-ray Free Electron Laser
Nanoscale Ultrafast Lattice Modulation with Hard X-ray Free Electron Laser Open
Understanding and controlling microscopic dynamics across spatial and temporal scales has driven major progress in science and technology over the past several decades. While ultrafast laser-based techniques have enabled probing nanoscale …
View article: Dynamics of nanoscale phase decomposition in laser ablation
Dynamics of nanoscale phase decomposition in laser ablation Open
Laser ablation is a process that bears both fundamental physics interest and has wide industrial applications. For decades, the lack of probes on the relevant time and length scales has prevented access to the highly nonequilibrium phase d…
View article: Scalable Van Der Waals Integration of III‐N Devices Over 2D Materials for CMOS‐Compatible Architectures
Scalable Van Der Waals Integration of III‐N Devices Over 2D Materials for CMOS‐Compatible Architectures Open
Advances in semiconductor technology have been primarily driven by exponentially reducing the size of silicon transistors and pushing the quantum limit. However, continued scaling becomes extremely difficult in accordance with Moore's law.…
View article: 1.6‐Inch Transparent Micro‐Display with Pixel Circuit Integrated microLED Chip Array by Misalignment‐Free Transfer (Adv. Mater. 9/2025)
1.6‐Inch Transparent Micro‐Display with Pixel Circuit Integrated microLED Chip Array by Misalignment‐Free Transfer (Adv. Mater. 9/2025) Open
View article: Hidden domain boundary dynamics toward crystalline perfection
Hidden domain boundary dynamics toward crystalline perfection Open
A central paradigm of nonequilibrium physics concerns the dynamics of heterogeneity and disorder, impacting processes ranging from the behavior of glasses to the emergent functionality of active matter. Understanding these complex mesoscop…
View article: Direct observation of ultrafast cluster dynamics in supercritical carbon dioxide using X-ray Photon Correlation Spectroscopy
Direct observation of ultrafast cluster dynamics in supercritical carbon dioxide using X-ray Photon Correlation Spectroscopy Open
Supercritical fluids exhibit distinct thermodynamic and transport properties, making them of particular interest for a wide range of scientific and engineering applications. These anomalous properties emerge from structural heterogeneities…
View article: Nanometer-Scale Acoustic Wave Packets Generated by Stochastic Core-Level Photoionization Events
Nanometer-Scale Acoustic Wave Packets Generated by Stochastic Core-Level Photoionization Events Open
We demonstrate that the absorption of femtosecond hard x-ray pulses excites quasispherical, high-amplitude, and high-wave-vector coherent acoustic phonon wave packets using an all hard-x-ray pump-probe scattering experiment. The time- and …
View article: Structural Evolution of Photoexcited Methylcobalamin toward a CarH-like Metastable State: Evidence from Time-Resolved X-ray Absorption and X-ray Emission
Structural Evolution of Photoexcited Methylcobalamin toward a CarH-like Metastable State: Evidence from Time-Resolved X-ray Absorption and X-ray Emission Open
CarH is a protein photoreceptor that uses a form of B12, adenosylcobalamin (AdoCbl), to sense light via formation of a metastable excited state. Aside from AdoCbl bound to CarH, methylcobalamin (MeCbl) is the only other example─…
View article: <i>In situ</i> coherent x-ray scattering reveals polycrystalline structure and discrete annealing events in strongly coupled nanocrystal superlattices
<i>In situ</i> coherent x-ray scattering reveals polycrystalline structure and discrete annealing events in strongly coupled nanocrystal superlattices Open
Solution-phase bottom up self-assembly of nanocrystals into superstructures such as ordered superlattices is an attractive strategy to generate functional materials of increasing complexity, including very recent advances that incorporate …
View article: Augmented interpretation of HER2, ER, and PR in breast cancer by artificial intelligence analyzer: enhancing interobserver agreement through a reader study of 201 cases
Augmented interpretation of HER2, ER, and PR in breast cancer by artificial intelligence analyzer: enhancing interobserver agreement through a reader study of 201 cases Open
Background Accurate classification of breast cancer molecular subtypes is crucial in determining treatment strategies and predicting clinical outcomes. This classification largely depends on the assessment of human epidermal growth factor …
View article: Hidden domain boundary dynamics towards crystalline perfection
Hidden domain boundary dynamics towards crystalline perfection Open
A central paradigm of non-equilibrium physics concerns the dynamics of heterogeneity and disorder, impacting processes ranging from the behavior of glasses to the emergent functionality of active matter. Understanding these complex mesosco…
View article: Inflamed immune phenotype predicts favorable clinical outcomes of immune checkpoint inhibitor therapy across multiple cancer types
Inflamed immune phenotype predicts favorable clinical outcomes of immune checkpoint inhibitor therapy across multiple cancer types Open
Background The inflamed immune phenotype (IIP), defined by enrichment of tumor-infiltrating lymphocytes (TILs) within intratumoral areas, is a promising tumor-agnostic biomarker of response to immune checkpoint inhibitor (ICI) therapy. How…
View article: In situ coherent X-ray scattering reveals polycrystalline structure and discrete annealing events in strongly-coupled nanocrystal superlattices
In situ coherent X-ray scattering reveals polycrystalline structure and discrete annealing events in strongly-coupled nanocrystal superlattices Open
Solution-phase bottom up self-assembly of nanocrystals into superstructures such as ordered superlattices is an attractive strategy to generate functional materials of increasing complexity, including very recent advances that incorporate …
View article: A versatile pressure-cell design for studying ultrafast molecular-dynamics in supercritical fluids using coherent multi-pulse x-ray scattering
A versatile pressure-cell design for studying ultrafast molecular-dynamics in supercritical fluids using coherent multi-pulse x-ray scattering Open
Supercritical fluids (SCFs) can be found in a variety of environmental and industrial processes. They exhibit an anomalous thermodynamic behavior, which originates from their fluctuating heterogeneous micro-structure. Characterizing the dy…
View article: Hard X-ray Generation and Detection of Nanometer-Scale Localized Coherent Acoustic Wave Packets in SrTiO$_3$ and KTaO$_3$
Hard X-ray Generation and Detection of Nanometer-Scale Localized Coherent Acoustic Wave Packets in SrTiO$_3$ and KTaO$_3$ Open
We demonstrate that the absorption of femtosecond x-ray pulses can excite quasi-spherical high-wavevector coherent acoustic phonon wavepackets using an all x-ray pump and probe scattering experiment. The time- and momentum-resolved diffuse…
View article: Directly observing atomic-scale relaxations of a glass forming liquid using femtosecond X-ray photon correlation spectroscopy
Directly observing atomic-scale relaxations of a glass forming liquid using femtosecond X-ray photon correlation spectroscopy Open
Glass forming liquids exhibit structural relaxation behaviors, reflecting underlying atomic rearrangements on a wide range of timescales. These behaviors play a crucial role in determining many material properties. However, the relaxation …
View article: Artificial intelligence-powered spatial analysis of tumor-infiltrating lymphocytes for prediction of prognosis in resected colon cancer
Artificial intelligence-powered spatial analysis of tumor-infiltrating lymphocytes for prediction of prognosis in resected colon cancer Open
View article: 1446 Pan-cancer methylation analysis reveals a significant correlation of immune-desert phenotype with methylation aberrancy
1446 Pan-cancer methylation analysis reveals a significant correlation of immune-desert phenotype with methylation aberrancy Open
Background Recently, the degree of methylation aberrancy, or methylation burden has shown inverse correlation with tumor immunogenicity measured by gene expression profile (GEP) reflecting activated immune cells across multiple cancer type…
View article: 1293 Fragmented pattern of tumor mass is related to fibroblast activation mitigating spatial interaction between tumor and immune cells
1293 Fragmented pattern of tumor mass is related to fibroblast activation mitigating spatial interaction between tumor and immune cells Open
Background Microscopic tumor fragmentation has shown association with the immune landscape of tumor microenvironment (TME).1 The current study aimed to further investigate the effect of the tumor fragmentation index (TFI), defin…
View article: Deep learning model improves tumor-infiltrating lymphocyte evaluation and therapeutic response prediction in breast cancer
Deep learning model improves tumor-infiltrating lymphocyte evaluation and therapeutic response prediction in breast cancer Open
Tumor-infiltrating lymphocytes (TILs) have been recognized as key players in the tumor microenvironment of breast cancer, but substantial interobserver variability among pathologists has impeded its utility as a biomarker. We developed a d…
View article: Hard x-ray – optical four-wave mixing using a split-and-delay line
Hard x-ray – optical four-wave mixing using a split-and-delay line Open
New, hard x-ray free electron lasers (FEL) produce intense femtosecond-to-attosecond pulses at angstrom wavelengths, giving access to the fundamental spatial and temporal scales of matter. These revolutionary light sources open the door to…
View article: Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mo stretchy="false">(</mml:mo><mml:msub><mml:mrow><mml:mi>TaSe</mml:mi></mml:mrow><mml:mrow><mml:mn>4</mml:mn></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mo stretchy="false">)</mml:mo></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub><mml:mi mathvariant="normal">I</mml:mi></mml:mrow></mml:math>
Ultrafast X-Ray Scattering Reveals Composite Amplitude Collective Mode in the Weyl Charge Density Wave Material Open
We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe_{4})_{2}I following ultrafast infrared photoexcitation. From the time-dependent diffraction signal at the CDW sidebands we identify a…
View article: Enhanced charge density wave with mobile superconducting vortices in La<sub>1.885</sub>Sr<sub>0.115</sub>CuO<sub>4</sub>.
Enhanced charge density wave with mobile superconducting vortices in La<sub>1.885</sub>Sr<sub>0.115</sub>CuO<sub>4</sub>. Open
Superconductivity in the cuprates is found to be intertwined with charge and spin density waves. Determining the interactions between the different types of order is crucial for understanding these important materials. Here, we elucidate t…
View article: 1285 Spatial analysis of tumor-infiltrating lymphocytes (TILs) based on HER2 expression across multiple cancer types
1285 Spatial analysis of tumor-infiltrating lymphocytes (TILs) based on HER2 expression across multiple cancer types Open
Background Newer strategies of targeting HER2 such as novel HER2-targeted agents and combination with immune checkpoint inhibitors (ICIs) call for development of newer biomarkers based on deeper understanding of biology. To understand the …
View article: Ultrafast x-ray scattering reveals composite amplitude collective mode in the Weyl charge density wave material (TaSe$_4$)$_2$I
Ultrafast x-ray scattering reveals composite amplitude collective mode in the Weyl charge density wave material (TaSe$_4$)$_2$I Open
We report ultrafast x-ray scattering experiments of the quasi-1D charge density wave (CDW) material (TaSe$_4$)$_2$I following photoexcitation with femtosecond infrared laser pulses. From the time-dependent diffraction signal at the CDW sid…
View article: Testing the data framework for an AI algorithm in preparation for high data rate X-ray facilities
Testing the data framework for an AI algorithm in preparation for high data rate X-ray facilities Open
The advent of next-generation X-ray free electron lasers will be capable of delivering X-rays at a repetition rate approaching 1 MHz continuously. This will require the development of data systems to handle experiments at these type of fac…