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Bashir S, Aiman A, Chaudhary AA, Khan N, Ahanger IA, Sami N, Almugri EA, Ali MA, Khan SUD, Shahid M, Basir SF, Hassan MI, Islam A. Probing protein aggregation through spectroscopic insights and multimodal approaches: A comprehensive review for counteracting neurodegenerative disorders. Heliyon 2024; 10:e27949. [PMID: 38689955 PMCID: PMC11059433 DOI: 10.1016/j.heliyon.2024.e27949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 03/01/2024] [Accepted: 03/08/2024] [Indexed: 05/02/2024] Open
Abstract
Aberrant accumulation of protein misfolding can cause aggregation and fibrillation and is one of the primary characteristic features of neurodegenerative diseases. Because they are disordered, misfolded, and aggregated proteins pose a significant setback in drug designing. The structural study of intermediate steps in these kinds of aggregated proteins will allow us to determine the conformational changes as well as the probable pathways encompassing various neurodegenerative disorders. The analysis of protein aggregates involved in neurodegenerative diseases relies on a diverse toolkit of biophysical techniques, encompassing both morphological and non-morphological methods. Additionally, Thioflavin T (ThT) assays and Circular Dichroism (CD) spectroscopy facilitate investigations into aggregation kinetics and secondary structure alterations. The collective application of these biophysical techniques empowers researchers to comprehensively unravel the intricate nature of protein aggregates associated with neurodegeneration. Furthermore, the topics covered in this review have summed up a handful of well-established techniques used for the structural analysis of protein aggregation. This multifaceted approach advances our fundamental understanding of the underlying mechanisms driving neurodegenerative diseases and informs potential therapeutic strategies.
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Affiliation(s)
- Sania Bashir
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Ayesha Aiman
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Anis Ahmad Chaudhary
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Nashrah Khan
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Ishfaq Ahmad Ahanger
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Neha Sami
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Eman Abdullah Almugri
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Mohamed A.M. Ali
- Department of Biology, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
- Department of Biochemistry, Faculty of Science, Ain Shams University, Abbassia, 11566, Cairo, Egypt
| | - Salah-Ud-Din Khan
- Department of Biochemistry, College of Medicine, Imam Mohammad Ibn Saud Islamic Universi-ty (IMSIU), Riyadh, 11623, Saudi Arabia
| | - Mohammad Shahid
- Department of Basic Medical Sciences, College of Medicine, Prince Sattam Bin Abdulaziz University, AlKharj, 11942, Saudi Arabia
| | - Seemi Farhat Basir
- Department of Biosciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Md Imtaiyaz Hassan
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
| | - Asimul Islam
- Centre for Interdisciplinary Research in Basic Sciences, Jamia Millia Islamia, Jamia Nagar, New Delhi, 110025, India
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Abd Aziz NA, Awang N, Chan KM, Kamaludin NF, Mohamad Anuar NN. Organotin (IV) Dithiocarbamate Compounds as Anticancer Agents: A Review of Syntheses and Cytotoxicity Studies. Molecules 2023; 28:5841. [PMID: 37570810 PMCID: PMC10421081 DOI: 10.3390/molecules28155841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 08/13/2023] Open
Abstract
Organotin (IV) dithiocarbamate has recently received attention as a therapeutic agent among organotin (IV) compounds. The individual properties of the organotin (IV) and dithiocarbamate moieties in the hybrid complex form a synergy of action that stimulates increased biological activity. Organotin (IV) components have been shown to play a crucial role in cytotoxicity. The biological effects of organotin compounds are believed to be influenced by the number of Sn-C bonds and the number and nature of alkyl or aryl substituents within the organotin structure. Ligands target and react with molecules while preventing unwanted changes in the biomolecules. Organotin (IV) dithiocarbamate compounds have also been shown to have a broad range of cellular, biochemical, and molecular effects, with their toxicity largely determined by their structure. Continuing the investigation of the cytotoxicity of organotin (IV) dithiocarbamates, this mini-review delves into the appropriate method for synthesis and discusses the elemental and spectroscopic analyses and potential cytotoxic effects of these compounds from articles published since 2010.
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Affiliation(s)
| | - Normah Awang
- Center for Toxicology and Health Risk Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (N.A.A.A.); (K.M.C.); (N.F.K.); (N.N.M.A.)
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3
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Ma X, Liu Q, Yu N, Xu D, Kim S, Liu Z, Jiang K, Wong BM, Yan R, Liu M. 6 nm super-resolution optical transmission and scattering spectroscopic imaging of carbon nanotubes using a nanometer-scale white light source. Nat Commun 2021; 12:6868. [PMID: 34824270 PMCID: PMC8617169 DOI: 10.1038/s41467-021-27216-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 11/03/2021] [Indexed: 11/09/2022] Open
Abstract
Optical transmission and scattering spectroscopic microscopy at the visible and adjacent wavelengths denote one of the most informative and inclusive characterization methods in material research. Unfortunately, restricted by the diffraction limit of light, it cannot resolve the nanoscale variation in light absorption and scattering, diagnostics of the local inhomogeneity in material structure and properties. Moreover, a large quantity of nanomaterials has anisotropic optical properties that are appealing yet hard to characterize through conventional optical methods. There is an increasing demand to extend the optical hyperspectral imaging into the nanometer length scale. In this work, we report a super-resolution hyperspectral imaging technique that uses a nanoscale white light source generated by superfocusing the light from a tungsten-halogen lamp to simultaneously obtain optical transmission and scattering spectroscopic images. A 6-nm spatial resolution in the visible to near-infrared wavelength regime (415-980 nm) is demonstrated on an individual single-walled carbon nanotube (SW-CNT). Both the longitudinal and transverse optical electronic transitions are measured, and the SW-CNT chiral indices can be identified. The band structure modulation in a SW-CNT through strain engineering is mapped.
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Affiliation(s)
- Xuezhi Ma
- grid.266097.c0000 0001 2222 1582Department of Electrical and Computer Engineering, University of California — Riverside, Riverside, CA 92521 USA
| | - Qiushi Liu
- grid.266097.c0000 0001 2222 1582Department of Electrical and Computer Engineering, University of California — Riverside, Riverside, CA 92521 USA
| | - Ning Yu
- grid.266097.c0000 0001 2222 1582Department of Chemical and Environmental Engineering, University of California — Riverside, Riverside, CA 92521 USA
| | - Da Xu
- grid.266097.c0000 0001 2222 1582Department of Electrical and Computer Engineering, University of California — Riverside, Riverside, CA 92521 USA
| | - Sanggon Kim
- grid.266097.c0000 0001 2222 1582Department of Chemical and Environmental Engineering, University of California — Riverside, Riverside, CA 92521 USA
| | - Zebin Liu
- grid.12527.330000 0001 0662 3178State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, 100084 Beijing, China
| | - Kaili Jiang
- grid.12527.330000 0001 0662 3178State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics, Tsinghua University, 100084 Beijing, China
| | - Bryan M. Wong
- grid.266097.c0000 0001 2222 1582Department of Chemical and Environmental Engineering, University of California — Riverside, Riverside, CA 92521 USA ,grid.266097.c0000 0001 2222 1582Materials Science and Engineering program, University of California — Riverside, Riverside, CA 92521 USA
| | - Ruoxue Yan
- Department of Chemical and Environmental Engineering, University of California - Riverside, Riverside, CA, 92521, USA. .,Materials Science and Engineering program, University of California - Riverside, Riverside, CA, 92521, USA.
| | - Ming Liu
- Department of Electrical and Computer Engineering, University of California - Riverside, Riverside, CA, 92521, USA.
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Infrared-spectroscopic, dynamic near-field microscopy of living cells and nanoparticles in water. Sci Rep 2021; 11:21860. [PMID: 34750511 PMCID: PMC8576021 DOI: 10.1038/s41598-021-01425-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Accepted: 10/26/2021] [Indexed: 11/17/2022] Open
Abstract
Infrared fingerprint spectra can reveal the chemical nature of materials down to 20-nm detail, far below the diffraction limit, when probed by scattering-type scanning near-field optical microscopy (s-SNOM). But this was impossible with living cells or aqueous processes as in corrosion, due to water-related absorption and tip contamination. Here, we demonstrate infrared s-SNOM of water-suspended objects by probing them through a 10-nm thick SiN membrane. This separator stretches freely over up to 250 µm, providing an upper, stable surface to the scanning tip, while its lower surface is in contact with the liquid and localises adhering objects. We present its proof-of-principle applicability in biology by observing simply drop-casted, living E. coli in nutrient medium, as well as living A549 cancer cells, as they divide, move and develop rich sub-cellular morphology and adhesion patterns, at 150 nm resolution. Their infrared spectra reveal the local abundances of water, proteins, and lipids within a depth of ca. 100 nm below the SiN membrane, as we verify by analysing well-defined, suspended polymer spheres and through model calculations. SiN-membrane based s-SNOM thus establishes a novel tool of live cell nano-imaging that returns structure, dynamics and chemical composition. This method should benefit the nanoscale analysis of any aqueous system, from physics to medicine.
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Nano-FTIR spectroscopic identification of prebiotic carbonyl compounds in Dominion Range 08006 carbonaceous chondrite. Sci Rep 2021; 11:11656. [PMID: 34079034 PMCID: PMC8172632 DOI: 10.1038/s41598-021-91200-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2021] [Accepted: 05/24/2021] [Indexed: 12/02/2022] Open
Abstract
Meteorites contain organic matter that may have contributed to the origin of life on Earth. Carbonyl compounds such as aldehydes and carboxylic acids, which occur in meteorites, may be precursors of biologically necessary organic materials in the solar system. Therefore, such organic matter is of astrobiological importance and their detection and characterization can contribute to the understanding of the early solar system as well as the origin of life. Most organic matter is typically sub-micrometer in size, and organic nanoglobules are even smaller (50–300 nm). Novel analytical techniques with nanoscale spatial resolution are required to detect and characterize organic matter within extraterrestrial materials. Most techniques require powdered samples, consume the material, and lose petrographic context of organics. Here, we report the detection of nanoglobular aldehyde and carboxylic acids in a highly primitive carbonaceous chondrite (DOM 08006) with ~ 20 nm spatial resolution using nano-FTIR spectroscopy. Such organic matter is found within the matrix of DOM 08006 and is typically 50–300 nm in size. We also show petrographic context and nanoscale morphologic/topographic features of the organic matter. Our results indicate that prebiotic carbonyl nanoglobules can form in a less aqueous and relatively elevated temperature-environment (220–230 °C) in a carbonaceous parent body.
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Yao Z, Chen X, Wehmeier L, Xu S, Shao Y, Zeng Z, Liu F, Mcleod AS, Gilbert Corder SN, Tsuneto M, Shi W, Wang Z, Zheng W, Bechtel HA, Carr GL, Martin MC, Zettl A, Basov DN, Chen X, Eng LM, Kehr SC, Liu M. Probing subwavelength in-plane anisotropy with antenna-assisted infrared nano-spectroscopy. Nat Commun 2021; 12:2649. [PMID: 33976184 PMCID: PMC8113487 DOI: 10.1038/s41467-021-22844-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 03/29/2021] [Indexed: 02/03/2023] Open
Abstract
Infrared nano-spectroscopy based on scattering-type scanning near-field optical microscopy (s-SNOM) is commonly employed to probe the vibrational fingerprints of materials at the nanometer length scale. However, due to the elongated and axisymmetric tip shank, s-SNOM is less sensitive to the in-plane sample anisotropy in general. In this article, we report an easy-to-implement method to probe the in-plane dielectric responses of materials with the assistance of a metallic disk micro-antenna. As a proof-of-concept demonstration, we investigate here the in-plane phonon responses of two prototypical samples, i.e. in (100) sapphire and x-cut lithium niobate (LiNbO3). In particular, the sapphire in-plane vibrations between 350 cm-1 to 800 cm-1 that correspond to LO phonon modes along the crystal b- and c-axis are determined with a spatial resolution of < λ/10, without needing any fitting parameters. In LiNbO3, we identify the in-plane orientation of its optical axis via the phonon modes, demonstrating that our method can be applied without prior knowledge of the crystal orientation. Our method can be elegantly adapted to retrieve the in-plane anisotropic response of a broad range of materials, i.e. subwavelength microcrystals, van-der-Waals materials, or topological insulators.
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Affiliation(s)
- Ziheng Yao
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA ,grid.184769.50000 0001 2231 4551Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Xinzhong Chen
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA
| | - Lukas Wehmeier
- grid.4488.00000 0001 2111 7257Institute of Applied Physics, Technische Universität Dresden, Dresden, Germany ,grid.4488.00000 0001 2111 7257ct.qmat, Dresden-Würzburg Cluster of Excellence-EXC 2147, Technische Universität Dresden, Dresden, Germany
| | - Suheng Xu
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA ,grid.21729.3f0000000419368729Department of Physics, Columbia University, New York, NY USA
| | - Yinming Shao
- grid.21729.3f0000000419368729Department of Physics, Columbia University, New York, NY USA
| | - Zimeng Zeng
- grid.12527.330000 0001 0662 3178State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China
| | - Fanwei Liu
- grid.12527.330000 0001 0662 3178State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China
| | - Alexander S. Mcleod
- grid.21729.3f0000000419368729Department of Physics, Columbia University, New York, NY USA
| | - Stephanie N. Gilbert Corder
- grid.184769.50000 0001 2231 4551Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Makoto Tsuneto
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA
| | - Wu Shi
- grid.184769.50000 0001 2231 4551Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA ,grid.47840.3f0000 0001 2181 7878Department of Physics, University of California, Berkeley, CA USA ,grid.8547.e0000 0001 0125 2443Institute of Nanoelectronic Devices and Quantum Computing, Fudan University, Shanghai, China
| | - Zihang Wang
- grid.47840.3f0000 0001 2181 7878Department of Physics, University of California, Berkeley, CA USA
| | - Wenjun Zheng
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA
| | - Hans A. Bechtel
- grid.184769.50000 0001 2231 4551Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - G. L. Carr
- grid.202665.50000 0001 2188 4229National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY USA
| | - Michael C. Martin
- grid.184769.50000 0001 2231 4551Advanced Light Source Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Alex Zettl
- grid.184769.50000 0001 2231 4551Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA ,grid.47840.3f0000 0001 2181 7878Department of Physics, University of California, Berkeley, CA USA
| | - D. N. Basov
- grid.21729.3f0000000419368729Department of Physics, Columbia University, New York, NY USA
| | - Xi Chen
- grid.12527.330000 0001 0662 3178State Key Laboratory of Low-Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing, China
| | - Lukas M. Eng
- grid.4488.00000 0001 2111 7257Institute of Applied Physics, Technische Universität Dresden, Dresden, Germany ,grid.4488.00000 0001 2111 7257ct.qmat, Dresden-Würzburg Cluster of Excellence-EXC 2147, Technische Universität Dresden, Dresden, Germany
| | - Susanne C. Kehr
- grid.4488.00000 0001 2111 7257Institute of Applied Physics, Technische Universität Dresden, Dresden, Germany
| | - Mengkun Liu
- grid.36425.360000 0001 2216 9681Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY USA ,grid.202665.50000 0001 2188 4229National Synchrotron Light Source II, Brookhaven National Laboratory, Upton, NY USA
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7
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Vighi M, Bayo J, Fernández-Piñas F, Gago J, Gómez M, Hernández-Borges J, Herrera A, Landaburu J, Muniategui-Lorenzo S, Muñoz AR, Rico A, Romera-Castillo C, Viñas L, Rosal R. Micro and Nano-Plastics in the Environment: Research Priorities for the Near Future. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2021; 257:163-218. [PMID: 34487249 DOI: 10.1007/398_2021_69] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Plastic litter dispersed in the different environmental compartments represents one of the most concerning problems associated with human activities. Specifically, plastic particles in the micro and nano size scale are ubiquitous and represent a threat to human health and the environment. In the last few decades, a huge amount of research has been devoted to evaluate several aspects of micro/nano-plastic contamination: origin and emissions, presence in different compartments, environmental fate, effects on human health and the environment, transfer in the food web and the role of associated chemicals and microorganisms. Nevertheless, despite the bulk of information produced, several knowledge gaps still exist. The objective of this paper is to highlight the most important of these knowledge gaps and to provide suggestions for the main research needs required to describe and understand the most controversial points to better orient the research efforts for the near future. Some of the major issues that need further efforts to improve our knowledge on the exposure, effects and risk of micro/nano-plastics are: harmonization of sampling procedures; development of more accurate, less expensive and less time-consuming analytical methods; assessment of degradation patterns and environmental fate of fragments; evaluating the capabilities for bioaccumulation and transfer to the food web; and evaluating the fate and the impact of chemicals and microorganisms associated with micro/nano-plastics. The major gaps in all sectors of our knowledge, from exposure to potentially harmful effects, refer to small size microplastics and, particularly, to the occurrence, fate and effects of nanoplastics.
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Affiliation(s)
| | - Javier Bayo
- Department of Chemical and Environmental Engineering, Technical University of Cartagena, Cartagena, Spain
| | | | - Jesús Gago
- Instituto Español de Oceanografía (IEO), Vigo, Spain
| | - May Gómez
- EOMAR: Marine Ecophysiology Group, IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | - Javier Hernández-Borges
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna, San Cristóbal de La Laguna, Spain
- Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna, San Cristóbal de La Laguna, Spain
| | - Alicia Herrera
- EOMAR: Marine Ecophysiology Group, IU-ECOAQUA, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain
| | | | - Soledad Muniategui-Lorenzo
- Grupo Química Analítica Aplicada, Instituto Universitario de Medio Ambiente (IUMA), Centro de Investigaciones Científicas Avanzadas (CICA), Facultade de Ciencias, Universidade da Coruña, A Coruña, Spain
| | - Antonio-Román Muñoz
- Departamento de Biología Animal, Facultad de Ciencias, Universidad de Málaga, Málaga, Spain
| | - Andreu Rico
- IMDEA-Water Institute, Madrid, Spain
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | - Cristina Romera-Castillo
- Department of Marine Biology and Oceanography, Institut de Ciències del Mar-CSIC, Barcelona, Spain
| | - Lucía Viñas
- Instituto Español de Oceanografía (IEO), Vigo, Spain
| | - Roberto Rosal
- Department of Chemical Engineering, University of Alcalá, Madrid, Spain.
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Yalcin SE, Legg BA, Yeşilbaş M, Malvankar NS, Boily JF. Direct observation of anisotropic growth of water films on minerals driven by defects and surface tension. SCIENCE ADVANCES 2020; 6:eaaz9708. [PMID: 32832658 PMCID: PMC7439304 DOI: 10.1126/sciadv.aaz9708] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 06/10/2020] [Indexed: 05/10/2023]
Abstract
Knowledge of the occurrences of water films on minerals is critical for global biogeochemical and atmospheric processes, including element cycling and ice nucleation. The underlying mechanisms controlling water film growth are, however, misunderstood. Using infrared nanospectroscopy, amplitude-modulated atomic force microscopy, and molecular simulations, we show how water films grow from water vapor on hydrophilic mineral nanoparticles. We imaged films with up to four water layers that grow anisotropically over a single face. Growth usually begins from the near edges of a face where defects preferentially capture water vapor. Thicker films produced by condensation cooling completely engulf nanoparticles and form thicker menisci over defects. The high surface tension of water smooths film surfaces and produces films of inhomogeneous thickness. Nanoscale topography and film surface energy thereby control anisotropic distributions and thicknesses of water films on hydrophilic mineral nanoparticles.
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Affiliation(s)
- Sibel Ebru Yalcin
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA
- Microbial Sciences Institute, Yale University, West Haven, CT 06516, USA
| | - Benjamin A. Legg
- Physical Sciences Division, Pacific Northwest National Laboratory, Richland, WA 99352, USA
- Department of Materials Science and Engineering, University of Washington, Seattle, WA 98195, USA
| | - Merve Yeşilbaş
- Department of Chemistry, Umeå University, SE-901 87 Umeå, Sweden
| | - Nikhil S. Malvankar
- Department of Molecular Biophysics and Biochemistry, Yale University, New Haven, CT 06511, USA
- Microbial Sciences Institute, Yale University, West Haven, CT 06516, USA
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9
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Ogliore RC, Dwyer C, Krawczynski MJ, Couvy H, Eisele M, Filiberto J. Identification of Large Isotope Anomalies in Quartz by Infrared Spectroscopy. APPLIED SPECTROSCOPY 2019; 73:767-773. [PMID: 31107100 DOI: 10.1177/0003702819842558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
We report an infrared (IR) spectroscopic technique to detect quartz grains with large isotope anomalies. We synthesized isotopically doped quartz and used Fourier transform infrared spectroscopy (FT-IR) in two different instruments: a traditional far-field instrument and a neaSpec nanoFT-IR, to quantify the shift in the peak of the Si-O stretch near 780 cm-1 as a function of isotope composition, and the uncertainty in this shift. From these measurements, we estimated the minimum detectable isotope anomaly using FT-IR. The described technique can be used to nondestructively detect very small (30 nm) presolar grains. In particular, supernova grains, which can have very large isotope anomalies, are detectable by this method.
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Affiliation(s)
- Ryan C Ogliore
- 1 Department of Physics, Washington University in St. Louis, St. Louis, MO, USA
| | - Cosette Dwyer
- 2 W. M. Keck Science Department, Scripps College, Claremont, CA, USA
| | - Michael J Krawczynski
- 3 Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA
| | - Hélène Couvy
- 3 Department of Earth & Planetary Sciences, Washington University in St. Louis, St. Louis, MO, USA
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Chen X, Hu D, Mescall R, You G, Basov DN, Dai Q, Liu M. Modern Scattering-Type Scanning Near-Field Optical Microscopy for Advanced Material Research. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2019; 31:e1804774. [PMID: 30932221 DOI: 10.1002/adma.201804774] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 02/27/2019] [Indexed: 05/27/2023]
Abstract
Infrared and optical spectroscopy represents one of the most informative methods in advanced materials research. As an important branch of modern optical techniques that has blossomed in the past decade, scattering-type scanning near-field optical microscopy (s-SNOM) promises deterministic characterization of optical properties over a broad spectral range at the nanoscale. It allows ultrabroadband optical (0.5-3000 µm) nanoimaging, and nanospectroscopy with fine spatial (<10 nm), spectral (<1 cm-1 ), and temporal (<10 fs) resolution. The history of s-SNOM is briefly introduced and recent advances which broaden the horizons of this technique in novel material research are summarized. In particular, this includes the pioneering efforts to study the nanoscale electrodynamic properties of plasmonic metamaterials, strongly correlated quantum materials, and polaritonic systems at room or cryogenic temperatures. Technical details, theoretical modeling, and new experimental methods are also discussed extensively, aiming to identify clear technology trends and unsolved challenges in this exciting field of research.
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Affiliation(s)
- Xinzhong Chen
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Debo Hu
- Division of Nanophotonics, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Ryan Mescall
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
| | - Guanjun You
- Shanghai Key Lab of Modern Optical Systems and Engineering Research Center of Optical Instrument and System, Ministry of Education, University of Shanghai for Science and Technology, Shanghai, 200093, China
| | - D N Basov
- Department of Physics, Columbia University, New York, NY, 10027, USA
| | - Qing Dai
- Division of Nanophotonics, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, China
| | - Mengkun Liu
- Department of Physics and Astronomy, Stony Brook University, Stony Brook, NY, 11794, USA
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11
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Nanoscale infrared imaging analysis of carbonaceous chondrites to understand organic-mineral interactions during aqueous alteration. Proc Natl Acad Sci U S A 2019; 116:753-758. [PMID: 30602454 DOI: 10.1073/pnas.1816265116] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Organic matter in carbonaceous chondrites is distributed in fine-grained matrix. To understand pre- and postaccretion history of organic matter and its association with surrounding minerals, microscopic techniques are mandatory. Infrared (IR) spectroscopy is a useful technique, but the spatial resolution of IR is limited to a few micrometers, due to the diffraction limit. In this study, we applied the high spatial resolution IR imaging method to CM2 carbonaceous chondrites Murchison and Bells, which is based on an atomic force microscopy (AFM) with its tip detecting thermal expansion of a sample resulting from absorption of infrared radiation. We confirmed that this technique permits ∼30 nm spatial resolution organic analysis for the meteorite samples. The IR imaging results are consistent with the previously reported association of organic matter and phyllosilicates, but our results are at much higher spatial resolution. This observation of heterogeneous distributions of the functional groups of organic matter revealed its association with minerals at ∼30 nm spatial resolution in meteorite samples by IR spectroscopy.
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Dendisová M, Jeništová A, Parchaňská-Kokaislová A, Matějka P, Prokopec V, Švecová M. The use of infrared spectroscopic techniques to characterize nanomaterials and nanostructures: A review. Anal Chim Acta 2018; 1031:1-14. [DOI: 10.1016/j.aca.2018.05.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 05/15/2018] [Accepted: 05/16/2018] [Indexed: 01/25/2023]
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14
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Wang H, Wang L, Jakob DS, Xu XG. Tomographic and multimodal scattering-type scanning near-field optical microscopy with peak force tapping mode. Nat Commun 2018; 9:2005. [PMID: 29784951 PMCID: PMC5962580 DOI: 10.1038/s41467-018-04403-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 04/20/2018] [Indexed: 11/10/2022] Open
Abstract
Scattering-type scanning near-field optical microscopy (s-SNOM) enables nanoscale spectroscopic imaging and has been instrumental for many nano-photonic discoveries and in situ studies. However, conventional s-SNOM techniques with atomic force microscopy tapping mode operation and lock-in detections do not provide direct tomographic information with explicit tip−sample distance. Here, we present a non-traditional s-SNOM technique, named peak force scattering-type scanning near-field optical microscopy (PF-SNOM), by combination of peak force tapping mode and time-gated light detection. PF-SNOM enables direct sectioning of vertical near-field signals from a sample surface for both three-dimensional near-field imaging and spectroscopic analysis. Tip-induced relaxation of surface phonon polaritons are revealed and modeled by considering tip damping. PF-SNOM also delivers a spatial resolution of 5 nm and can simultaneously measure mechanical and electrical properties together with optical near-field signals. PF-SNOM is expected to facilitate three-dimensional nanoscale near-field characterizations and correlative in situ investigations on light-induced mechanical and electrical effects. Scanning near-field optical microscopy (SNOM) offers nanometer-scale spatial resolution, but generally does not retain tomographic information. Here, Wang et al. develop peak-force SNOM to section scattered fields and improve imaging resolution.
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Affiliation(s)
- Haomin Wang
- Department of Chemistry, Lehigh University, 6 E Packer Avenue, Bethlehem, PA, 18015, USA
| | - Le Wang
- Department of Chemistry, Lehigh University, 6 E Packer Avenue, Bethlehem, PA, 18015, USA
| | - Devon S Jakob
- Department of Chemistry, Lehigh University, 6 E Packer Avenue, Bethlehem, PA, 18015, USA
| | - Xiaoji G Xu
- Department of Chemistry, Lehigh University, 6 E Packer Avenue, Bethlehem, PA, 18015, USA.
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Freitas RO, Deneke C, Maia FCB, Medeiros HG, Moreno T, Dumas P, Petroff Y, Westfahl H. Low-aberration beamline optics for synchrotron infrared nanospectroscopy. OPTICS EXPRESS 2018; 26:11238-11249. [PMID: 29716048 DOI: 10.1364/oe.26.011238] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 03/28/2018] [Indexed: 06/08/2023]
Abstract
Synchrotron infrared nanospectroscopy is a recently developed technique that enables new possibilities in the broadband chemical analysis of materials in the nanoscale, far beyond the diffraction limit in this frequency domain. Synchrotron infrared ports have exploited mainly the high brightness advantage provided by electron storage rings across the whole infrared range. However, optical aberrations in the beam produced by the source depth of bending magnet emission at large angles prevent infrared nanospectroscopy to reach its maximum capability. In this work we present a low-aberration optical layout specially designed and constructed for a dedicated synchrotron infrared nanospectroscopy beamline. We report excellent agreement between simulated beam profiles (from standard wave propagation and raytracing optics simulations) with experimental measurements. We report an important improvement in the infrared nanospectroscopy experiment related to the improved beamline optics. Finally, we demonstrate the performance of the nanospectroscopy endstation by measuring a hyperspectral image of a polar material and we evaluate the setup sensitivity by measuring ultra-thin polymer films down to 6 nm thick.
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Levasseur-Regourd AC, Agarwal J, Cottin H, Engrand C, Flynn G, Fulle M, Gombosi T, Langevin Y, Lasue J, Mannel T, Merouane S, Poch O, Thomas N, Westphal A. Cometary Dust. SPACE SCIENCE REVIEWS 2018; 214:64. [PMID: 35095119 PMCID: PMC8793767 DOI: 10.1007/s11214-018-0496-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/16/2018] [Indexed: 05/15/2023]
Abstract
This review presents our understanding of cometary dust at the end of 2017. For decades, insight about the dust ejected by nuclei of comets had stemmed from remote observations from Earth or Earth's orbit, and from flybys, including the samples of dust returned to Earth for laboratory studies by the Stardust return capsule. The long-duration Rosetta mission has recently provided a huge and unique amount of data, obtained using numerous instruments, including innovative dust instruments, over a wide range of distances from the Sun and from the nucleus. The diverse approaches available to study dust in comets, together with the related theoretical and experimental studies, provide evidence of the composition and physical properties of dust particles, e.g., the presence of a large fraction of carbon in macromolecules, and of aggregates on a wide range of scales. The results have opened vivid discussions on the variety of dust-release processes and on the diversity of dust properties in comets, as well as on the formation of cometary dust, and on its presence in the near-Earth interplanetary medium. These discussions stress the significance of future explorations as a way to decipher the formation and evolution of our Solar System.
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Affiliation(s)
- Anny-Chantal Levasseur-Regourd
- Sorbonne Université; UVSQ; CNRS/INSU; Campus Pierre et Marie Curie, BC 102, 4 place Jussieu, F-75005 Paris, France, Tel.: + 33 144274875,
| | - Jessica Agarwal
- Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, D-37077, Göttingen, Germany
| | - Hervé Cottin
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), UMR CNRS 7583, Université Paris-Est Créteil et Université Paris Diderot, Institut Pierre Simon Laplace, 94000 Créteil, France
| | - Cécile Engrand
- Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), CNRS/IN2P3 Université Paris Sud - UMR 8609, Université Paris-Saclay, Bâtiment 104, 91405 Orsay Campus, France
| | - George Flynn
- SUNY-Plattsburgh, 101 Broad St, Plattsburgh, NY 12901, United States
| | - Marco Fulle
- INAF - Osservatorio Astronomico, Via Tiepolo 11, 34143 Trieste Italy
| | - Tamas Gombosi
- Department of Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | - Yves Langevin
- Institut dAstrophysique Spatiale (IAS), CNRS/Université Paris Sud, Bâtiment 121, 91405 Orsay France
| | - Jérémie Lasue
- IRAP, Université de Toulouse, CNRS, UPS, CNES, Toulouse, France
| | - Thurid Mannel
- Space Research Institute, Austrian Academy of Sciences, Schmiedlstrasse 6, 8042 Graz, Austria; Physics Institute, University of Graz, Universitätsplatz 5, 8010 Graz, Austria
| | - Sihane Merouane
- Max-Planck-Institut für Sonnensystemforschung, Justus-von-Liebig-Weg, 3, D-37077, Göttingen, Germany
| | - Olivier Poch
- Institut de Planétologie et d'Astrophysique de Grenoble (IPAG), Univ. Grenoble Alpes, CNRS, IPAG, 38000 Grenoble, France
| | - Nicolas Thomas
- Physikalisches Institut, Universität Bern, Sidlerstrasse 5, 3012, Bern, Switzerland
| | - Andrew Westphal
- Space Sciences Laboratory, U.C. Berkeley, Berkeley, California 94720-7450 USA
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Hao Z, Bechtel HA, Kneafsey T, Gilbert B, Nico PS. Cross-Scale Molecular Analysis of Chemical Heterogeneity in Shale Rocks. Sci Rep 2018; 8:2552. [PMID: 29416052 PMCID: PMC5803189 DOI: 10.1038/s41598-018-20365-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 01/10/2018] [Indexed: 11/13/2022] Open
Abstract
The organic and mineralogical heterogeneity in shale at micrometer and nanometer spatial scales contributes to the quality of gas reserves, gas flow mechanisms and gas production. Here, we demonstrate two molecular imaging approaches based on infrared spectroscopy to obtain mineral and kerogen information at these mesoscale spatial resolutions in large-sized shale rock samples. The first method is a modified microscopic attenuated total reflectance measurement that utilizes a large germanium hemisphere combined with a focal plane array detector to rapidly capture chemical images of shale rock surfaces spanning hundreds of micrometers with micrometer spatial resolution. The second method, synchrotron infrared nano-spectroscopy, utilizes a metallic atomic force microscope tip to obtain chemical images of micrometer dimensions but with nanometer spatial resolution. This chemically "deconvoluted" imaging at the nano-pore scale is then used to build a machine learning model to generate a molecular distribution map across scales with a spatial span of 1000 times, which enables high-throughput geochemical characterization in greater details across the nano-pore and micro-grain scales and allows us to identify co-localization of mineral phases with chemically distinct organics and even with gas phase sorbents. This characterization is fundamental to understand mineral and organic compositions affecting the behavior of shales.
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Affiliation(s)
- Zhao Hao
- Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California, 94720, USA
| | - Hans A Bechtel
- Advanced Light Source, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California, 94720, USA
| | - Timothy Kneafsey
- Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California, 94720, USA
| | - Benjamin Gilbert
- Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California, 94720, USA
| | - Peter S Nico
- Earth and Environmental Sciences Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, California, 94720, USA.
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Freitas RO, Maia FCB, Deneke C, Moreno T, Dumas P, Westfahl H, Petroff Y. Infrared Nanospectroscopy at the LNLS: Current Status and Ongoing Developments. ACTA ACUST UNITED AC 2017. [DOI: 10.1080/08940886.2017.1338420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Raul O. Freitas
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials, Campinas, Sao Paulo, Brazil
| | - Francisco C. B. Maia
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials, Campinas, Sao Paulo, Brazil
| | - Christoph Deneke
- Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials, Campinas, Sao Paulo, Brazil
- Departamento de Fisica Aplicada, Instituto de Fisica “Gleb Wataghin,” Universidade Estadual de Campinas, Campinas, Sao Paulo, Brazil
| | | | - Paul Dumas
- SOLEIL Synchrotron, Gif-sur-Yvette, France
| | - Harry Westfahl
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials, Campinas, Sao Paulo, Brazil
| | - Yves Petroff
- Brazilian Synchrotron Light Laboratory (LNLS), Brazilian Center for Research in Energy and Materials, Campinas, Sao Paulo, Brazil
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Wooden DH, Ishii HA, Zolensky ME. Cometary dust: the diversity of primitive refractory grains. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2017; 375:20160260. [PMID: 28554979 PMCID: PMC5454228 DOI: 10.1098/rsta.2016.0260] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/13/2017] [Indexed: 05/07/2023]
Abstract
Comet dust is primitive and shows significant diversity. Our knowledge of the properties of primitive cometary particles has expanded significantly through microscale investigations of cosmic dust samples (anhydrous interplanetary dust particles (IDPs), chondritic porous (CP) IDPs and UltraCarbonaceous Antarctic micrometeorites, Stardust and Rosetta), as well as through remote sensing (Spitzer IR spectroscopy). Comet dust are aggregate particles of materials unequilibrated at submicrometre scales. We discuss the properties and processes experienced by primitive matter in comets. Primitive particles exhibit a diverse range of: structure and typology; distribution of constituents; concentration and form of carbonaceous and refractory organic matter; Mg- and Fe-contents of the silicate minerals; sulfides; existence/abundance of type II chondrule fragments; high-temperature calcium-aluminium inclusions and ameboid-olivine aggregates; and rarely occurring Mg-carbonates and magnetite, whose explanation requires aqueous alteration on parent bodies. The properties of refractory materials imply there were disc processes that resulted in different comets having particular selections of primitive materials. The diversity of primitive particles has implications for the diversity of materials in the protoplanetary disc present at the time and in the region where the comets formed.This article is part of the themed issue 'Cometary science after Rosetta'.
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Affiliation(s)
- D H Wooden
- NASA Ames Research Center, Moffett Field, CA 94035-0001, USA
| | - H A Ishii
- University of Hawaii, Hawai'i Institute of Geophysics and Planetology, Honolulu, HI 96822, USA
| | - M E Zolensky
- NASA Johnson Space Center, ARES, X12 2010 NASA Parkway, Houston, TX 77058-3607, USA
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Gainsforth Z, Butterworth AL, Stodolna J, Westphal AJ, Huss GR, Nagashima K, Ogliore R, Brownlee DE, Joswiak D, Tyliszczak T, Simionovici AS. Constraints on the formation environment of two chondrule-like igneous particles from Comet 81P/Wild 2. METEORITICS & PLANETARY SCIENCE 2015; 50:976-1004. [PMID: 31031558 PMCID: PMC6480418 DOI: 10.1111/maps.12445] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Using chemical and petrologic evidence and modeling, we deduce that two chondrule-like particles named Iris and Callie, from Stardust cometary track C2052,12,74, formed in an environment very similar to that seen for type II chondrules in meteorites. Iris was heated near liquidus, equilibrated, and cooled at ≤ 100 °C/hr and within ≈ 2 log units of the IW buffer with a high partial pressure of Na such as would be present with dust enrichments of ≈ 103. There was no detectable metamorphic, nebular or aqueous alteration. In previous work Ogliore et al. (2012) reported that Iris formed late, > 3 Myr after CAIs, assuming 26Al was homogenously distributed, and was rich in heavy oxygen. Iris may be similar to assemblages found only in interplanetary dust particles and Stardust cometary samples called Kool particles. Callie is chemically and isotopically very similar but not identical to Iris.
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Affiliation(s)
- Zack Gainsforth
- Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA 94720 USA
| | - Anna L. Butterworth
- Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA 94720 USA
| | - Julien Stodolna
- Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA 94720 USA
| | - Andrew J. Westphal
- Space Sciences Laboratory, University of California at Berkeley, Berkeley, CA 94720 USA
| | - Gary R. Huss
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa, Honolulu, HI 96822 USA
| | - Kazu Nagashima
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa, Honolulu, HI 96822 USA
| | - Ryan Ogliore
- Hawai’i Institute of Geophysics and Planetology, University of Hawai’i at Mānoa, Honolulu, HI 96822 USA
| | - Donald E. Brownlee
- Department of Astronomy, University of Washington, Seattle, WA 98195 USA
| | - David Joswiak
- Department of Astronomy, University of Washington, Seattle, WA 98195 USA
| | - Tolek Tyliszczak
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA
| | - Alexandre S. Simionovici
- Institut des Sciences de la Terre, Observatoire des Sciences de l’Univers de Grenoble, Grenoble, France
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Centrone A. Infrared Imaging and Spectroscopy Beyond the Diffraction Limit. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2015; 8:101-26. [PMID: 26001952 DOI: 10.1146/annurev-anchem-071114-040435] [Citation(s) in RCA: 153] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Progress in nanotechnology is enabled by and dependent on the availability of measurement methods with spatial resolution commensurate with nanomaterials' length scales. Chemical imaging techniques, such as scattering scanning near-field optical microscopy (s-SNOM) and photothermal-induced resonance (PTIR), have provided scientists with means of extracting rich chemical and structural information with nanoscale resolution. This review presents some basics of infrared spectroscopy and microscopy, followed by detailed descriptions of s-SNOM and PTIR working principles. Nanoscale spectra are compared with far-field macroscale spectra, which are widely used for chemical identification. Selected examples illustrate either technical aspects of the measurements or applications in materials science. Central to this review is the ability to record nanoscale infrared spectra because, although chemical maps enable immediate visualization, the spectra provide information to interpret the images and characterize the sample. The growing breadth of nanomaterials and biological applications suggest rapid growth for this field.
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Affiliation(s)
- Andrea Centrone
- Center for Nanoscale Science and Technology, National Institute of Standards and Technology, Gaithersburg, Maryland 20899;
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