Raman Imaging and Spectrometers
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This year's RamanFest conference brought together an exceptional gathering of scientists and innovators exploring the many dimensions of Raman spectroscopy. Over two days, the event offered a rich and interdisciplinary program that reflected both the depth of theoretical inquiry and the breadth of practical applications emerging from Raman-based technologies. From probing atomic vibrations to enabling real-time diagnostics, the presentations exemplified a shared spirit of curiosity, precision, and collaboration.
The event opened with a focus on foundational studies, where Raman spectroscopy continues to illuminate the intricate relationships between atomic-scale structure, vibrational behavior, and material properties. Olivier Pagès and his international collaborators, from Université de Lorraine (France), introduced a nuanced percolation-based model to interpret Raman spectra in disordered A1-xBxC semiconductor alloys. This approach, which moves beyond the traditional virtual crystal approximation, enables a deeper understanding of how local bond environments influence vibrational dynamics, particularly under varying symmetries and pressure-induced phase transitions.
Building on this theoretical depth, Henrik Hoyer of TU Darmstadt (Germany) presented modulation excitation Raman spectroscopy as a way to probe active lattice dynamics in copper–ceria catalysts. His work revealed critical insights into the Mars–van Krevelen mechanism and surface oxygen vacancy behavior, findings that could inform the rational design of catalytic systems.
Nimrod Bachar from Ariel University (Israel) explored magneto-elastic interactions in i-MAX 2D materials using low-temperature Raman spectroscopy. By modeling temperature-dependent phonon shifts across an antiferromagnetic transition, his team quantified spin–phonon coupling in a rare-earth layered material system, revealing rich quantum magnetic behavior.
These studies collectively demonstrated Raman spectroscopy’s enduring power as a probe of fundamental physical phenomena and a guide for theoretical advancement.
As the focus shifted toward applications, the conference spotlighted the expanding role of Raman spectroscopy in life sciences, environmental research, and process monitoring. The technique’s non-invasive nature, molecular specificity, and compatibility with complex sample types are enabling breakthroughs across a wide spectrum of disciplines.
Dr. Jyothi Balachandran Nair of the Leibniz Institute (Germany) presented a SERS-based nanoparticle system to monitor chemotherapeutic effects at the single-cell level, with impressive sensitivity and clinical promise for hard-to-detect cancers. In a similar spirit, Victoria Barygina from the University of Florence (Italy) introduced a multimodal optical sensor capable of distinguishing stress-related biomarkers in skin via Raman, fluorescence, and reflectance modalities, achieving 100% classification accuracy in preliminary trials.
Jessica Gabb of IS-Instruments (UK) demonstrated a deep UV Raman spectrometer tailored for biological samples, capable of resolving otherwise fluorescence-masked features and tracking key stages in antibody purification workflows. Her work highlighted Raman’s growing utility in quality assurance for biomanufacturing.
Stefan Schlatt from the University of Münster (Germany) presented a compelling vision for non-destructive sperm analysis using Raman spectroscopy. His work connects decades of sperm morphology research to new optical methods capable of assessing DNA integrity and fertility potential, bridging the gap between reproductive biology and clinical technology.
Closing this section, Daniele Barbiero of CNR-IFN (Italy) showcased a novel Raman-based method for detecting hydrogen gas produced by Clostridium contamination in milk. His team's approach, which merges classical microbiological principles with modern optical diagnostics, provides a highly sensitive and practical tool for food safety applications. As a HORIBA partner, his position in this lineup emphasized the company's support of real-world, instrument-driven solutions grounded in Raman innovation.
At the cutting edge of spatial resolution and chemical sensitivity, tip-enhanced Raman spectroscopy (TERS) and plasmonic-based approaches took center stage in this section. These technologies are now capable of imaging individual nanostructures and interfaces with chemical specificity that rival electron microscopy, without requiring invasive sample preparation.
Naresh Kumar from ETH Zurich (Switzerland) demonstrated TERS imaging of functional thin films, revealing hidden interfacial chemistries in polymer blends, solar cells, and thermochromic coatings. His study on Sb2Se3-based photovoltaics in particular uncovered chemically diffuse interfaces and unexpected dopant incorporation that influence device performance.
Volker Deckert and his team in Friedrich Schiller University (Germany) explored TERS on polymer nanoparticles, coupling Raman mapping with AFM nanoindentation to link chemical structure with mechanical behavior. Their study highlighted how reversible micelle cross-linking affects nanoparticle stiffness, offering molecular-level insight into the optimization of drug delivery platforms.
Yury Gogotsi of Drexel University (USA) shared the latest applications of TERS and SERS to MXenes, a family of 2D transition metal carbides. His presentation emphasized how vibrational signatures, especially under in situ electrochemical conditions, reveal oxidation pathways, ion insertion, and surface charge-transfer behavior in energy storage systems.
Bringing the HORIBA perspective, Alice Fiocco and collaborators presented intriguing “magic bands” observed in TERS spectra of MoS2 and WS2 on specially engineered gold substrates capped with monolayer h-BN. Their work not only demonstrated the enhancement capabilities of optimized plasmonic substrates but also contributed new insight into h-BN–induced proximity effects and their dependence on excitation wavelength.
Looking toward the future, several presentations demonstrated how artificial intelligence and machine learning are transforming Raman spectroscopy into an intelligent, adaptive platform for autonomous measurement, prediction, and optimization.
Jana Hahn of the Paul-Ehrlich-Institut (Germany) introduced machine learning tools for analyzing protein–adjuvant interactions in vaccines. Her team used autoencoders and synthetic data generation to outperform classical curve-fitting methods in quantifying spectral components, pointing toward real-time quality control solutions in biopharma.
From China’s Laser Fusion Research Center, Wenbo Mo and Shuang Ni shared AI-based strategies for spectral-image fusion in tumor diagnostics and for intelligent segmentation in theoretical Raman calculations. Their work bridges optical measurement with high-performance computation, enabling more interpretable, data-rich outputs from complex biological systems.
Silke Christiansen of Fraunhofer IKTS (Germany) presented a vision for Raman spectroscopy as the central node in a correlative, multi-modal data ecosystem. Through her use of the Correlyze platform and HORIBA's nanoGPS registration tools, she showed how Raman can be fused with X-ray, electron, and infrared data to support AI-enhanced material and tissue analysis across scales.
Adding to this, Clara Dubois of HORIBA France unveiled a smart synthesis reactor that integrates real-time Raman spectroscopy with machine learning in a closed-loop system. Her approach enabled autonomous optimization of catalyst production by dynamically adjusting synthesis conditions in response to spectral feedback, an elegant convergence of spectroscopy, AI, and automation.
RamanFest 2025 conference offered a compelling snapshot of a field in motion, at once grounded in deep physical theory and accelerating toward transformative applications. Across each session, what stood out was not only the technical sophistication of the work presented, but also the sense of openness, collaboration, and shared purpose among participants.
Whether advancing models of lattice disorder, optimizing nanocarriers for targeted drug delivery, or deploying AI to decode complex spectral data, the community is collectively charting a path toward broader adoption and deeper integration of Raman spectroscopy across disciplines.
As the boundaries of science and technology continue to blur, RamanFest event reaffirmed that Raman spectroscopy is more than a diagnostic tool. It is a bridge between scales, disciplines, and communities, connecting the molecular world to societal challenges with clarity, precision, and purpose.
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