Article
Geochemistry & Geophysics
James O. Thompson, Daniel B. Williams, Rachel J. Lee, Michael S. Ramsey
Summary: Acquiring accurate high temperature laboratory-based infrared emission spectra of geologic samples is crucial for understanding their radiative and spectral properties. A new micro-furnace design improved the measurement accuracy and expanded the temperature and spectral ranges for sample and calibration data acquisition. This study demonstrated changes in emissivity spectra of forsterite, quartz, and Hawaiian basalt samples, providing insights for thermal/mass flux calculations and satellite data analysis.
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
(2021)
Article
Spectroscopy
Evgeniy A. Paukshtis, Evgenii V. Kovalyov, Tatiana S. Glazneva, Sergei G. Kazarian
Summary: A new approach using a mirror sub-strate for infrared spectroscopic analysis of fiberglass materials enables detection of hard-to-analyze research samples.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2021)
Article
Multidisciplinary Sciences
Rosario Javier-Astete, Jessenia Melo, Jorge Jimenez-Davalos, Gaston Zolla
Summary: This study validated a model for the classification of wood species and a universal model for the rapid determination of cellulose, hemicellulose, and lignin using FTIR spectroscopy coupled with chemometrics. The results showed that the full spectra can be used to differentiate different species and identify infrared peaks associated with cellulose, hemicellulose, and lignin. In addition, the full spectra helped build a three species universal model for quantifying the principal wood chemical components. Therefore, the study demonstrated that FTIR-ATR, together with chemometrics, is a reliable method for discriminating wood species and determining wood chemical composition.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Dezhuang Ji, Xuan Li, Moh'd Rezeq, Wesley Cantwell, Lianxi Zheng
Summary: A thermal emissivity modulator based on single-walled carbon nanotubes (SWCNTs) is realized by ionic gating and demonstrated to have potential in thermal camouflage and infrared display applications.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Environmental Sciences
Mary F. Langsdale, Martin Wooster, Jeremy J. Harrison, Michael Koehl, Christoph Hecker, Simon J. Hook, Elsa Abbott, William R. Johnson, Alessandro Maturilli, Laurent Poutier, Ian C. Lau, Franz Brucker
Summary: Information on spectral emissivity is crucial for retrieving and evaluating land surface temperature estimates from remote sensing. Differences in SE measurements have a significant impact on satellite LST estimation. The study suggests that variations in SE measurements derived from laboratory setups may be larger than previously assumed.
Article
Agriculture, Dairy & Animal Science
Linda Cerna, Maria E. Rodriguez Espinosa, Weixian Zhang, Peiqiang Yu
Summary: Feed processing methods can induce molecular structure changes in chickpeas, which in turn affects their nutritional value for ruminant animals. This study used vibrational molecular spectroscopy to reveal the molecular structure features of different chickpea varieties and detect the molecular structure changes induced by thermal processing methods. The results showed that the molecular structure of chickpeas is associated with nutrient availability for animals.
Article
Multidisciplinary Sciences
Natalia Szulc, Michal Burdukiewicz, Marlena Gasior-Glogowska, Jakub W. Wojciechowski, Jaroslaw Chilimoniuk, Pawel Mackiewicz, Tomas Sneideris, Vytautas Smirnovas, Malgorzata Kotulska
Summary: Several disorders are related to amyloid aggregation of proteins, and identifying amyloids usually requires high resolution microscopies or less expensive methods like infrared spectroscopy. Different experimental methods can lead to peptide misclassification. Bioinformatics methods show good robustness to weak supervision.
SCIENTIFIC REPORTS
(2021)
Review
Medicine, General & Internal
Francesco Vigo, Alessandra Tozzi, Muriel Disler, Alessia Gisi, Vasileios Kavvadias, Tilemachos Kavvadias
Summary: Although spectroscopic techniques have been known since the first half of the twentieth century, their evolution has significantly accelerated after the 2000s due to the development of new computer technologies for analyzing large amounts of data. These techniques are now not limited to analytical chemistry, but are also useful instruments in the medical field. The analysis of urine samples using spectroscopy provides a potential diagnostic tool for early detection of diseases, with its versatility, speed, and ability to obtain a large volume of information.
Article
Nanoscience & Nanotechnology
Angela Vasanelli, Yanko Todorov, Baptiste Dailly, Sebastien Cosme, Djamal Gacemi, Andrew Haky, Isabelle Sagnes, Carlo Sirtori
Summary: Plasmons can form in heavily doped semiconductor layers without the need for potential barrier for electronic confinement, making them perfect absorbers for incandescent emission. By injecting microwave current in the doped layer, the temperature of the electron gas can be modulated, enabling high frequency thermal emission up to 50 MHz. The frequency-dependent thermal emission is well modeled theoretically with a potential frequency cutoff in the tens of GHz envisioned.
Review
Biochemistry & Molecular Biology
Giuseppina Gullifa, Laura Barone, Elena Papa, Stefano Materazzi, Roberta Risoluti
Summary: This article introduces the wide application of on-line thermally induced evolved gas analysis (OLTI-EGA) in various fields and reviews the latest applications of Evolved Gas Analysis coupled with infrared spectrometers (EGA-FTIR) online. The collected references from 2019, 2020, 2021, and early 2022 are briefly described, providing researchers with easy access to sometimes hard-to-locate applications.
Article
Biochemistry & Molecular Biology
Kornelia Lach, Aneta Kowal, Marta Perek-Polnik, Pawel Jakubczyk, Christopher J. Arthur, Wioletta Bal, Monika Drogosiewicz, Bozenna Dembowska-Baginska, Wieslawa Grajkowska, Jozef Cebulski, Radoslaw Chaber
Summary: This study evaluated the potential of FTIR spectroscopy as a diagnostic tool for medulloblastoma (MB). The results showed significant differences in FTIR spectra between MB and normal brain tissue, indicating that FTIR spectroscopy can be used to differentiate them to some extent. Therefore, it may be a valuable method to expedite and enhance histological diagnosis.
Article
Chemistry, Physical
Stanislav Rizevsky, Mikhail Matveyenka, Dmitry Kurouski
Summary: Lipids can modify the structure of amyloid-associated proteins and affect their rates of aggregation. Atomic force microscopy infrared spectroscopy was used to study the structure of insulin oligomers and observed strong interactions between lipids and proteins during the oligomer formation.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Josh Davies-Jones, Philip R. Davies, Arthur Graf, Dan Hewes, Katja E. Hill, Michael Pascoe
Summary: This study provides a detailed comparison between electron microscopy and nano-infrared microscopy for imaging microbial nanostructures. It demonstrates that spectroscopic mapping, with its surface sensitivity, chemical specificity, and non-destructive nature, offers significant advantages over transmission electron microscopy in the study of biological samples.
Article
Geology
Minghai Fu, Jingjing Dai, Xianguang Wang, Zhenghua Hu, Xudong Ma, Bo Peng, Xin Wan
Summary: Infrared spectroscopy is an innovative tool that can rapidly identify alteration minerals, improving our understanding of mineralization and enhancing prospecting efficiency.
ORE GEOLOGY REVIEWS
(2023)
Article
Geology
Jingjing Dai, Longxian Zhao, Bin Lin, Pan Tang, Minghai Fu
Summary: This study used thermal infrared (TIR) spectroscopy to investigate the zonation patterns of skarn minerals in the Jiama Cu-Mo deposit in Tibet, China. It found that the TIR characteristics of garnet can be used to identify different types of skarns. The study also observed variations in these TIR features at different locations and depths, highlighting the potential of TIR spectroscopy in skarn ore exploration.
ORE GEOLOGY REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Chenghao Wan, David Woolf, Colin M. Hessel, Jad Salman, Yuzhe Xiao, Chunhui Yao, Albert Wright, Joel M. Hensley, Mikhail A. Kats
Summary: The induced-transmission filter (ITF) utilizes a thin metallic layer to select a specific transmission band and suppress others, and a switchable mid-infrared ITF has been introduced for modulation of the filter response. This switchable feature is enabled by the reversible phase transition of a subwavelength film of vanadium dioxide (VO2), opening up new possibilities for tunable devices. The fabrication process involves thin-film VO2 on a suspended membrane, enabling the integration of VO2 into various thin-film assemblies compatible with physical vapor deposition processes.
Article
Materials Science, Multidisciplinary
Gregory R. Holdman, Gabriel R. Jaffe, Demeng Feng, Min Seok Jang, Mikhail A. Kats, Victor W. Brar
Summary: The use of silicon as a sail material for laser sail-based spacecraft poses thermal management challenges, as silicon can experience thermal runaway at high temperatures. Even under the most optimistic assumptions of material quality, temperatures above 400-500 K can lead to thermal runaway. In addition, above a design-specific threshold laser intensity, nonlinear two-photon absorption can also trigger thermal runaway.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Jonathan L. King, Alireza Shahsafi, Zhen Zhang, Chenghao Wan, Yuzhe Xiao, Chengzi Huang, Yifei Sun, Patrick J. Roney, Shriram Ramanathan, Mikhail A. Kats
Summary: We designed a temperature-dependent coating to counteract changes in blackbody radiation distribution caused by temperature, leveraging the nonhysteretic insulator-to-metal phase transition of SmNiO3. Our coating maintains nearly constant thermal radiance at each wavelength within the long-wave infrared atmospheric-transparency window over a temperature range of at least 20 degrees C. It can conceal thermal gradients and transient temperature changes from infrared imaging systems, including those that discriminate by wavelength.
Article
Nanoscience & Nanotechnology
Hongyan Mei, Alexander Koch, Chenghao Wan, Jura Rensberg, Zhen Zhang, Jad Salman, Martin Hafermann, Maximilian Schaal, Yuzhe Xiao, Raymond Wambold, Shriram Ramanathan, Carsten Ronning, Mikhail A. Kats
Summary: In this study, we demonstrated the ability to spatially modify metal oxides using a direct writing approach with a focused ion beam system. By doping a wide-bandgap semiconductor, zinc oxide, we achieved variable carrier concentrations, and by defect engineering a correlated semiconductor, vanadium dioxide, we locally modified its insulator-to-metal transition temperature. This area-selective modification method provides a simple and mask-less route to fabricate optical structures.
Article
Optics
Chunhui Yao, Hongyan Mei, Yuzhe Xiao, Alireza Shahsafi, William Derdeyn, Jonathan L. King, Chenghao Wan, Raluca O. Scarlat, Mark H. Anderson, Mikhail A. Kats
Summary: Temperature-dependent errors in infrared spectroscopy measurements can be corrected by implementing optical attenuation or applying correction factors.
Article
Chemistry, Multidisciplinary
Samir Rosas, Keegan A. Schoeller, Edward Chang, Hongyan Mei, Mikhail A. Kats, Kevin W. Eliceiri, Xinyu Zhao, Filiz Yesilkoy
Summary: Label-free and nondestructive mid-infrared vibrational hyperspectral imaging is an important tissue analysis tool that provides spatially resolved biochemical information. This study introduces an advanced mid-infrared spectrochemical tissue imaging modality using metasurfaces to capture quantitative molecular maps of large-area murine brain tissue sections. The results demonstrate that plasmonic metasurfaces enhance chemical contrast in infrared images and enable the detection of ultrathin tissue regions. This imaging method has the potential to have a broad impact on translational research and clinical histopathology.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Tiancheng Wang, Yuzhe Xiao, Jonathan L. King, Mikhail A. Kats, Kathleen J. Stebe, Daeyeon Lee
Summary: The study proposes a bioinspired PDRC structure that demonstrates excellent cooling, thinness, tunability, scalability, and mechanical robustness, achieved through mimicking the properties of natural materials.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Hongyan Mei, Guodong Ren, Boyang Zhao, Jad Salman, Gwan Yeong Jung, Huandong Chen, Shantanu Singh, Arashdeep S. Thind, John Cavin, Jordan A. Hachtel, Miaofang Chi, Shanyuan Niu, Graham Joe, Chenghao Wan, Nick Settineri, Simon J. Teat, Bryan C. Chakoumakos, Jayakanth Ravichandran, Rohan Mishra, Mikhail A. Kats
Summary: This work demonstrates that a bulk crystal with subtle periodic modulations in its structure, Sr9/8TiS3, exhibits transparent and positive-uniaxial properties in the mid- to far-infrared range, with extraordinary index n(e) = 4.5 and ordinary index n(o) = 2.4. The unique structural modulations contribute to the formation of highly oriented electron clouds, resulting in record birefringence.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Gabriel R. Jaffe, Gregory R. Holdman, Min Seok Jang, Demeng Feng, Mikhail A. Kats, Victor Watson Brar
Summary: Laser sails powered by ground-based lasers could achieve relativistic speeds, allowing for fast interstellar travel. However, interplanetary dust poses a significant threat to the survival of laser sails during acceleration. Simulations demonstrate that a single dust particle can trigger a thermal runaway process, destroying the entire sail. Proposed mitigation strategies include increasing thermal conductivity and isolating absorptive regions of the sail.
Article
Materials Science, Multidisciplinary
Alexander Koch, Hongyan Mei, Jura Rensberg, Martin Hafermann, Jad Salman, Chenghao Wan, Raymond Wambold, Daniel Blaschke, Heidemarie Schmidt, Jurgen Salfeld, Sebastian Geburt, Mikhail A. A. Kats, Carsten Ronning
Summary: This study demonstrates the heavy and hyper doping of ZnO with gallium (Ga) ions using a focused ion beam (FIB) system combined with post-implantation laser annealing. The ion implantation allows for the incorporation of impurities with high concentrations, while the laser annealing process activates the dopants close to or beyond the solid-solubility limit of Ga in ZnO. Heavy doped ZnO:Ga with a free-carrier concentration of approximately 10^(21) cm^(-3) and a plasma wavelength of 1.02 μm is achieved, making it a promising plasmonic material for applications in the near infrared regime.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Chemistry, Multidisciplinary
Manchen Hu, Emma Belliveau, Yilei Wu, Pournima Narayanan, Demeng Feng, Rabeeya Hamid, Natalia Murrietta, Ghada H. Ahmed, Mikhail A. Kats, Daniel N. Congreve
Summary: The deposition of a bulk heterojunction upconversion film using organic semiconductors has been achieved through a single-step solution-processed method. This materials system shows great promise for solid-state upconversion applications.
Article
Optics
P. Huft, Y. Song, T. M. Graham, K. Jooya, S. Deshpande, C. Fang, M. Kats, M. Saffman
Summary: In this paper, we present an approach for trapping cold atoms in a two-dimensional optical trap array generated without any active device. The design allows for the formation of arrays of bright or dark traps, or both simultaneously, and solves the problem of out-of-focus trapped atoms in periodic optical lattices. The experimental results demonstrate the successful creation of a 2D array of 1225 dark trap sites and the near perfect removal of Talbot plane traps using a high power yet low cost laser.
Article
Materials Science, Multidisciplinary
Demeng Feng, Raymond A. Wambold, Yuzhe Xiao, Chenghao Wan, Zhaoning Yu, Victor W. Brar, Mikhail A. Kats
Summary: The researchers proposed a method to enhance the optical pressure on a metal film suspended in free space by structuring it with a periodic array of nanoscale slots. However, their result contradicts the law of momentum conservation. Recalculations of the optical forces show that there was no enhancement, but instead matched the standard radiation-pressure relation.
