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Moretti M, Limongi T, Testi C, Milanetti E, De Angelis MT, Parrotta EI, Scalise S, Santamaria G, Allione M, Lopatin S, Torre B, Zhang P, Marini M, Perozziello G, Candeloro P, Pirri CF, Ruocco G, Cuda G, Di Fabrizio E. Direct Visualization and Identification of Membrane Voltage-Gated Sodium Channels from Human iPSC-Derived Neurons by Multiple Imaging and Light Enhanced Spectroscopy. SMALL METHODS 2022; 6:e2200402. [PMID: 35595684 DOI: 10.1002/smtd.202200402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/22/2022] [Indexed: 06/15/2023]
Abstract
In this study, transmission electron microscopy atomic force microscopy, and surface enhanced Raman spectroscopy are combined through a direct imaging approach, to gather structural and chemical information of complex molecular systems such as ion channels in their original plasma membrane. Customized microfabricated sample holder allows to characterize Nav channels embedded in the original plasma membrane extracted from neuronal cells that are derived from healthy human induced pluripotent stem cells. The identification of the channels is accomplished by using two different approaches, one of them widely used in cryo-EM (the particle analysis method) and the other based on a novel Zernike Polynomial expansion of the images bitmap. This approach allows to carry out a whole series of investigations, one complementary to the other, on the same sample, preserving its state as close as possible to the original membrane configuration.
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Affiliation(s)
- Manola Moretti
- King Abdullah University of Science and Technology, SMILEs lab, PSE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Tania Limongi
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129, Torino, Italy
| | - Claudia Testi
- Center for Life Nanoscience, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161, Rome, Italy
| | - Edoardo Milanetti
- Center for Life Nanoscience, Istituto Italiano di Tecnologia, Viale Regina Elena 291, 00161, Rome, Italy
- Department of Physics, Sapienza University, Piazzale Aldo Moro 5, Rome, 00185, Italy
| | - Maria Teresa De Angelis
- Laboratory of Stem Cell Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Elvira I Parrotta
- Laboratory of Stem Cell Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Stefania Scalise
- Laboratory of Stem Cell Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Gianluca Santamaria
- Laboratory of Stem Cell Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Marco Allione
- King Abdullah University of Science and Technology, SMILEs lab, PSE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Sergei Lopatin
- King Abdullah University of Science and Technology, Imaging and Characterization Core lab, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Bruno Torre
- King Abdullah University of Science and Technology, SMILEs lab, PSE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Peng Zhang
- King Abdullah University of Science and Technology, SMILEs lab, PSE Division, Thuwal, 23955-6900, Kingdom of Saudi Arabia
| | - Monica Marini
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129, Torino, Italy
| | - Gerardo Perozziello
- BionNEM lab and Nanotechnology Research Center, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Patrizio Candeloro
- BionNEM lab and Nanotechnology Research Center, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Candido Fabrizio Pirri
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129, Torino, Italy
| | - Giancarlo Ruocco
- Department of Physics, Sapienza University, Piazzale Aldo Moro 5, Rome, 00185, Italy
| | - Giovanni Cuda
- Laboratory of Stem Cell Biology, Department of Experimental and Clinical Medicine, University Magna Graecia, Campus S. Venuta, Viale Europa, Catanzaro, 88100, Italy
| | - Enzo Di Fabrizio
- Dipartimento di Scienza Applicata e Tecnologia, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129, Torino, Italy
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Chang RYK, Chow MY, Khanal D, Chen D, Chan HK. Dry powder pharmaceutical biologics for inhalation therapy. Adv Drug Deliv Rev 2021; 172:64-79. [PMID: 33705876 DOI: 10.1016/j.addr.2021.02.017] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 02/17/2021] [Accepted: 02/25/2021] [Indexed: 12/13/2022]
Abstract
Therapeutic biologics such as genes, peptides, proteins, virus and cells provide clinical benefits and are becoming increasingly important tools in respiratory medicine. Pulmonary delivery of therapeutic biologics enables the potential for safe and effective treatment option for respiratory diseases due to high bioavailability while minimizing absorption into the systemic circulation, reducing off-target toxicity to other organs. Development of inhalable powder formulation requires stabilization of complex biological materials, and each type of biologics may present unique challenges and require different formulation strategy combined with manufacture process to ensure biological and physical stabilities during production and over shelf-life. This review examines key formulation strategies for stabilizing proteins, nucleic acids, virus (bacteriophages) and bacterial cells in inhalable powders. It also covers characterization methods used to assess physicochemical properties and aerosol performance of the powders, biological activity and structural integrity of the biologics, and chemical analysis at the nanoscale. Furthermore, the review includes manufacture technologies which are based on lyophilization and spray-drying as they have been applied to manufacture Food and Drug Administration (FDA)-approved protein powders. In perspective, formulation and manufacture of inhalable powders for biologic are highly challenging but attainable. The key requirements are the stability of both the biologics and the powder, along with the powder dispersibility. The formulation to be developed depends on the manufacture process as it will subject the biologics to different stresses (temperature, mechanical and chemical) which could lead to degradation by different pathways. Stabilizing excipients coupled with the suitable choice of process can alleviate the stability issues of inhaled powders of biologics.
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Moretti M, La Rocca R, Perrone Donnorso M, Torre B, Canale C, Malerba M, Das G, Sottile R, Garofalo C, Achour A, Kärre K, Carbone E, Di Fabrizio E. Clustering of Major Histocompatibility Complex-Class I Molecules in Healthy and Cancer Colon Cells Revealed from Their Nanomechanical Properties. ACS NANO 2021; 15:7500-7512. [PMID: 33749234 DOI: 10.1021/acsnano.1c00897] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
The activation of the T cell mediated immune response relies on the fine interaction between the T cell receptor on the immune cell and the antigen-presenting major histocompatibility complex (MHC) molecules on the membrane surface of antigen-presenting cells. Both the distribution and quantity of MHC/peptide complexes and their adequate morphological presentation affect the activation of the immune cells. In several types of cancer the immune response is down-regulated due to the low expression of MHC-class I (MHC-I) molecules on the cell's surface, and in addition, the mechanical properties of the membrane seem to play a role. Herein, we investigate the distribution of MHC-I molecules and the related nanoscale mechanical environment on the cell surface of two cell lines derived from colon adenocarcinoma and a healthy epithelial colon reference cell line. Atomic force microscopy (AFM) force spectroscopy analysis using an antibody-tagged pyramidal probe specific for MHC-I molecules and a formula that relates the elasticity of the cell to the energy of adhesion revealed the different population distributions of MHC-I molecules in healthy cells compared to cancer cells. We found that MHC-I molecules are significantly less expressed in cancer cells. Moreover, the local elastic modulus is significantly reduced in cancer cells. We speculate that these results might be related to the proven ability of cancer cells to evade the immune system, not only by reducing MHC-I cell surface expression but also by modifying the local mechanical properties affecting the overall morphology of MHC-I synapse presentation to immune cells.
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Affiliation(s)
- Manola Moretti
- Single Molecule Imaging by Light Enhanced Spectroscopies Lab, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Jeddah, Kingdom of Saudi Arabia
| | - Rosanna La Rocca
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | | | - Bruno Torre
- Single Molecule Imaging by Light Enhanced Spectroscopies Lab, King Abdullah University of Science and Technology, 23955-6900 Thuwal, Jeddah, Kingdom of Saudi Arabia
| | - Claudio Canale
- Department of Physics, University of Genova, Via Dodecaneso 33, 16146 Genova, Italy
| | - Mario Malerba
- Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genova, Italy
| | - Gobind Das
- Department of Physics, Khalifa University, P. O. Box 127788 Abu Dhabi, United Arab Emirates
| | - Rosa Sottile
- Katharine Hsu Lab, Memorial Sloan Kettering Cancer Center, 1275 York Avenue, New York, New York 10065, United States
| | - Cinzia Garofalo
- Department for Experimental and Clinical Medicine, University of Catanzaro, Viale Europa, 88100 Catanzaro, Italy
| | - Adnane Achour
- Science for Life Laboratory, Department of Medicine, Solna, Karolinska Institute, and Division of Infectious Diseases, Karolinska University Hospital, 17176 Solna, Stockholm, Sweden
| | - Klas Kärre
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institute, Biomedicum Solnavägen 9, 17165 Solna, Stockholm, Sweden
| | - Ennio Carbone
- Dipartimento Medicina di Precisione, Università della Campania, via L. De Crecchio, 7, 80138 Naples, Italy
| | - Enzo Di Fabrizio
- Department of Applied Physics, Polytechnic University of Turin, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy
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Liu Q, Kim S, Ma X, Yu N, Zhu Y, Deng S, Yan R, Zhao H, Liu M. Ultra-sharp and surfactant-free silver nanowire for scanning tunneling microscopy and tip-enhanced Raman spectroscopy. NANOSCALE 2019; 11:7790-7797. [PMID: 30951064 DOI: 10.1039/c8nr08983c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Chemically-synthesized single-crystalline silver nanowire (AgNW) probes can combine the scanning tunneling microscopy (STM) technique with tip-enhanced Raman scattering spectroscopy (TERS) for complementary morphological and chemical information with nanoscale spatial resolution. However, its performance has been limited by the blunt nanowire tip geometry, the insulating surfactant layer coating AgNW surfaces, and the thermal-induced mechanical vibrations. Here, we report a reproducible fabrication method for the preparation of sharp-tip AgNW-based TERS probes. By removing the polyvinylpyrrolidone (PVP) surfactant molecules from the AgNW surfaces for stable electrical conductivity and controlling the protruding length with μm-level accuracy for improved mechanical stability, we demonstrate atomic-resolution STM imaging with the sharp-tip AgNW probe. Furthermore, the sharp-tip AgNW has an excellent TER enhancement (∼1.1 × 106), which is about 66 folds of that achieved by regular AgNWs. Our experiments demonstrate that AgNWs with clean interfaces and the proper tip geometry can provide reliable and reproducible STM and TER characterizations, which remove the hurdles preventing the implementation of AgNW in STM-based near-field optical applications for a broad community.
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Affiliation(s)
- Qiushi Liu
- Department of Electrical and Computer Engineering, Bourns College of Engineering, University of California-Riverside, Riverside, California 92521, USA.
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Gao L, Zhao H, Li T, Huo P, Chen D, Liu B. Atomic Force Microscopy Based Tip-Enhanced Raman Spectroscopy in Biology. Int J Mol Sci 2018; 19:E1193. [PMID: 29652860 PMCID: PMC5979470 DOI: 10.3390/ijms19041193] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 04/09/2018] [Accepted: 04/10/2018] [Indexed: 12/15/2022] Open
Abstract
Most biological phenomena occur at the nanometer scale, which is not accessible by the conventional optical techniques because of the optical diffraction limitation. Tip-enhanced Raman spectroscopy (TERS), one of the burgeoning probing techniques, not only can provide the topography characterization with high resolution, but also can deliver the chemical or molecular information of a sample beyond the optical diffraction limitation. Therefore, it has been widely used in various structural analyses pertaining to materials science, tissue engineering, biological processes and so on. Based on the different feedback mechanisms, TERS can be classified into three types: atomic force microscopy based TERS system (AFM-TERS), scanning tunneling microscopy based TERS system (STM-TERS) and shear force microscopy based TERS system (SFM-TERS). Among them, AFM-TERS is the most widely adopted feedback system by live biosamples because it can work in liquid and this allows the investigation of biological molecules under native conditions. In this review, we mainly focus on the applications of AFM-TERS in three biological systems: nucleic acids, proteins and pathogens. From the TERS characterization to the data analysis, this review demonstrates that AFM-TERS has great potential applications to visually characterizing the biomolecular structure and crucially detecting more nano-chemical information of biological systems.
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Affiliation(s)
- Lizhen Gao
- Institute of Photo-biophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Huiling Zhao
- Institute of Photo-biophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Tianfeng Li
- Institute of Photo-biophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Peipei Huo
- Laboratory of Functional Molecules and Materials, School of Physics and Optoelectronic Engineering, Shandong University of Technology, Xincun West Road 266, Zibo 255000, China.
| | - Dong Chen
- Institute of Photo-biophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
| | - Bo Liu
- Institute of Photo-biophysics, School of Physics and Electronics, Henan University, Kaifeng 475004, China.
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Deckert-Gaudig T, Taguchi A, Kawata S, Deckert V. Tip-enhanced Raman spectroscopy - from early developments to recent advances. Chem Soc Rev 2018. [PMID: 28640306 DOI: 10.1039/c7cs00209b] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
An analytical technique operating at the nanoscale must be flexible regarding variable experimental conditions while ideally also being highly specific, extremely sensitive, and spatially confined. In this respect, tip-enhanced Raman scattering (TERS) has been demonstrated to be ideally suited to, e.g., elucidating chemical reaction mechanisms, determining the distribution of components and identifying and localizing specific molecular structures at the nanometre scale. TERS combines the specificity of Raman spectroscopy with the high spatial resolution of scanning probe microscopies by utilizing plasmonic nanostructures to confine the incident electromagnetic field and increase it by many orders of magnitude. Consequently, molecular structure information in the optical near field that is inaccessible to other optical microscopy methods can be obtained. In this general review, the development of this still-young technique, from early experiments to recent achievements concerning inorganic, organic, and biological materials, is addressed. Accordingly, the technical developments necessary for stable and reliable AFM- and STM-based TERS experiments, together with the specific properties of the instruments under different conditions, are reviewed. The review also highlights selected experiments illustrating the capabilities of this emerging technique, the number of users of which has steadily increased since its inception in 2000. Finally, an assessment of the frontiers and new concepts of TERS, which aim towards rendering it a general and widely applicable technique that combines the highest possible lateral resolution and extreme sensitivity, is provided.
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7
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Bonhommeau S, Lecomte S. Tip-Enhanced Raman Spectroscopy: A Tool for Nanoscale Chemical and Structural Characterization of Biomolecules. Chemphyschem 2017; 19:8-18. [DOI: 10.1002/cphc.201701067] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/04/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Sébastien Bonhommeau
- University of Bordeaux; Institut des Sciences Moléculaires; CNRS UMR 5255; 351 cours de la Libération 33405 Talence cedex France
| | - Sophie Lecomte
- University of Bordeaux; Institut de Chimie et Biologie des Membranes et des Nano-objets; CNRS UMR 5248; Allée Geoffroy Saint Hilaire 33600 Pessac France
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Sereda V, Lednev IK. Two Mechanisms of Tip Enhancement of Raman Scattering by Protein Aggregates. APPLIED SPECTROSCOPY 2017; 71:118-128. [PMID: 27407009 DOI: 10.1177/0003702816651890] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Tip-enhanced Raman spectroscopy (TERS) is a powerful tool for probing the surface of biological species with nanometer spatial resolution. Here, we report the TER spectra of an individual insulin fibril, the protein cast film and a short peptide (LVEALYL) microcrystal mimicking the fibril core. Two different types of TER spectra were acquired depending on the "roughness" of the probed surface at the molecular level. A fully reproducible, low-intensity, normal Raman-type spectrum was characteristic of the top flat surface of the microcrystal while highly variable, higher intensity TER spectra were obtained for the edges of the microcrystal, cast film, and fibril. As a result, two tip enhancement mechanisms of Raman scattering, long- and short-range, were proposed by analogy with the physical and chemical enhancement mechanisms, respectively, known for surface-enhanced Raman spectroscopy.
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Deckert-Gaudig T, Kurouski D, Hedegaard MAB, Singh P, Lednev IK, Deckert V. Spatially resolved spectroscopic differentiation of hydrophilic and hydrophobic domains on individual insulin amyloid fibrils. Sci Rep 2016; 6:33575. [PMID: 27650589 PMCID: PMC5030623 DOI: 10.1038/srep33575] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2016] [Accepted: 08/31/2016] [Indexed: 12/14/2022] Open
Abstract
The formation of insoluble β-sheet-rich protein structures known as amyloid fibrils is associated with numerous neurodegenerative diseases, such as Alzheimer's and Parkinson's disease. A detailed understanding of the molecular structure of the fibril surface is of interest as the first contact with the physiological environment in vivo and plays a decisive role in biological activity and associated toxicity. Recent studies reveal that the inherent sensitivity and specificity of tip-enhanced Raman scattering (TERS) renders this technique a compelling method for fibril surface analysis at the single-particle level. Here, the reproducibility of TERS is demonstrated, indicating its relevance for detecting molecular variations. Consequently, individual fibrils are systematically investigated at nanometer spatial resolution. Spectral parameters were obtained by band-fitting, particularly focusing on the identification of the secondary structure via the amide III band and the differentiation of hydrophobic and hydrophilic domains on the surface. In addition multivariate data analysis, specifically the N-FINDR procedure, was employed to generate structure-specific maps. The ability of TERS to localize specific structural domains on fibril surfaces shows promise to the development of new fibril dissection strategies and can be generally applied to any (bio)chemical surface when structural variations at the nanometer level are of interest.
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Affiliation(s)
- Tanja Deckert-Gaudig
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany
| | - Dmitry Kurouski
- Chemistry Department Northwestern University, 2145 Sheridan rd, Evanston, IL 60208, USA
| | - Martin A. B. Hedegaard
- Department of Chemical Engineering, Biotechnology and Environmental Technology, University of Southern Denmark, Campusvej 55, 5230 Odense M, Denmark
| | - Pushkar Singh
- Institute for Physical Chemistry and Abbe School of Photonics, University of Jena, Helmholtzweg 4, 07743 Jena, Germany
| | - Igor K. Lednev
- Department of Chemistry, University at Albany, State University of New York, 1400 Washington Avenue, Albany, New York 12222, United States
| | - Volker Deckert
- Leibniz Institute of Photonic Technology (IPHT), Albert-Einstein-Str. 9, 07745 Jena, Germany
- Institute for Physical Chemistry and Abbe School of Photonics, University of Jena, Helmholtzweg 4, 07743 Jena, Germany
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Langelüddecke L, Singh P, Deckert V. Exploring the Nanoscale: Fifteen Years of Tip-Enhanced Raman Spectroscopy. APPLIED SPECTROSCOPY 2015; 69:1357-71. [PMID: 26554759 DOI: 10.1366/15-08014] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Spectroscopic methods with high spatial resolution are essential to understand the physical and chemical properties of nanoscale materials including biological and chemical materials. Tip-enhanced Raman spectroscopy (TERS) is a combination of surface-enhanced Raman spectroscopy (SERS) and scanning probe microscopy (SPM), which can provide high-resolution topographic and spectral information simultaneously below the diffraction limit of light. Even examples of sub-nanometer resolution have been demonstrated. This review intends to give an introduction to TERS, focusing on its basic principle and the experimental setup, the strengths followed by recent applications, developments, and perspectives in this field.
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Affiliation(s)
- Lucas Langelüddecke
- Institute of Physical Chemistry and Abbe Center of Photonics, University of Jena, Helmholtzweg 4, D-07743 Jena, Germany
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Boujday S, de la Chapelle ML, Srajer J, Knoll W. Enhanced Vibrational Spectroscopies as Tools for Small Molecule Biosensing. SENSORS 2015; 15:21239-64. [PMID: 26343666 PMCID: PMC4610423 DOI: 10.3390/s150921239] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/15/2015] [Revised: 08/06/2015] [Accepted: 08/10/2015] [Indexed: 12/28/2022]
Abstract
In this short summary we summarize some of the latest developments in vibrational spectroscopic tools applied for the sensing of (small) molecules and biomolecules in a label-free mode of operation. We first introduce various concepts for the enhancement of InfraRed spectroscopic techniques, including the principles of Attenuated Total Reflection InfraRed (ATR-IR), (phase-modulated) InfraRed Reflection Absorption Spectroscopy (IRRAS/PM-IRRAS), and Surface Enhanced Infrared Reflection Absorption Spectroscopy (SEIRAS). Particular attention is put on the use of novel nanostructured substrates that allow for the excitation of propagating and localized surface plasmon modes aimed at operating additional enhancement mechanisms. This is then be complemented by the description of the latest development in Surface- and Tip-Enhanced Raman Spectroscopies, again with an emphasis on the detection of small molecules or bioanalytes.
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Affiliation(s)
- Souhir Boujday
- UPMC Univ Paris 6, UMR CNRS 7197, Laboratoire de Réactivité de Surface, 4 Place Jussieu, F-75005 Paris, France.
- CNRS, UMR 7197, Laboratoire de Réactivité de Surface, F-75005 Paris, France.
- Center for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
| | - Marc Lamy de la Chapelle
- Université Paris 13, Sorbonne Paris Cité, Laboratoire CSPBAT, CNRS, (UMR 7244), 74 rue Marcel Cachin, F-93017 Bobigny, France.
| | - Johannes Srajer
- AIT Austrian Institute of Technology, Donau City Strasse 1, A-1220 Vienna, Austria.
| | - Wolfgang Knoll
- Center for Biomimetic Sensor Science, 50 Nanyang Drive, Singapore 637553, Singapore.
- AIT Austrian Institute of Technology, Donau City Strasse 1, A-1220 Vienna, Austria.
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Sharma G, Deckert-Gaudig T, Deckert V. Tip-enhanced Raman scattering--Targeting structure-specific surface characterization for biomedical samples. Adv Drug Deliv Rev 2015; 89:42-56. [PMID: 26130490 DOI: 10.1016/j.addr.2015.06.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2015] [Revised: 06/11/2015] [Accepted: 06/19/2015] [Indexed: 11/16/2022]
Abstract
Tip-enhanced Raman scattering (TERS) has become a powerful tool for nanoscale structural analysis for several branches of organic, inorganic, and biological chemistry. This highly sensitive technique enables molecular characterization with a lateral resolution far beyond Abbe's diffraction limit and correlates structural and topographic information on a nanometer scale. In this review, the current experimental concepts with respect to their strengths and obstacles are introduced and discussed. A further focus was set to biochemistry comprising applications like nucleic acids, proteins, and microorganisms, thus demonstrating the potential use towards the pharmaceutically relevant challenges where nanometer resolution is required.
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Affiliation(s)
- Gaurav Sharma
- Institute for Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, Friedrich Schiller-University Jena, D-07743 Jena, Germany
| | - Tanja Deckert-Gaudig
- Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, D-07745 Jena, Germany
| | - Volker Deckert
- Institute for Physical Chemistry and Abbe Center of Photonics, Helmholtzweg 4, Friedrich Schiller-University Jena, D-07743 Jena, Germany; Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, D-07745 Jena, Germany.
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Bhattacharjee S, Brayden DJ. Development of nanotoxicology: implications for drug delivery and medical devices. Nanomedicine (Lond) 2015; 10:2289-305. [DOI: 10.2217/nnm.15.69] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Current nanotoxicology research suffers from suboptimal in vitro models, lack of in vitro–in vivo correlations, variability within in vitro protocols, deficits in both material purity and physicochemical characterization. Reliable nanomaterial toxicity and mechanistic insights are required for health and toxicity risk assessments. Much in vitro toxicological data is inconclusive in designating whether nanomaterials for drug delivery and medical device implants are truly safe. A critique is presented to analyze the interface between toxicology and nanopharmaceuticals. Deficiencies of existing practices in toxicology are reviewed and useful emerging techniques (e.g., lab-on-a-chip, tissue engineering, atomic force microscopy, high-content analysis) are highlighted. Cross-fertilization between disciplines will aid development of biocompatible delivery and implant platforms while improvements are being suggested for better translation of nanotoxicology.
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Affiliation(s)
| | - David J Brayden
- Conway Institute, University College Dublin (UCD), Dublin, Ireland
- School of Veterinary Medicine, University College Dublin (UCD), Dublin, Ireland
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Affiliation(s)
- Karen A. Antonio
- University of Notre Dame, Department of
Chemistry and Biochemistry, Notre
Dame, Indiana 46556, United States
| | - Zachary D. Schultz
- University of Notre Dame, Department of
Chemistry and Biochemistry, Notre
Dame, Indiana 46556, United States
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15
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Alabastri A, Tuccio S, Giugni A, Toma A, Liberale C, Das G, Angelis FD, Fabrizio ED, Zaccaria RP. Molding of Plasmonic Resonances in Metallic Nanostructures: Dependence of the Non-Linear Electric Permittivity on System Size and Temperature. MATERIALS 2013; 6:4879-4910. [PMID: 28788366 PMCID: PMC5452772 DOI: 10.3390/ma6114879] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2013] [Revised: 10/08/2013] [Accepted: 10/10/2013] [Indexed: 01/07/2023]
Abstract
In this paper, we review the principal theoretical models through which the dielectric function of metals can be described. Starting from the Drude assumptions for intraband transitions, we show how this model can be improved by including interband absorption and temperature effect in the damping coefficients. Electronic scattering processes are described and included in the dielectric function, showing their role in determining plasmon lifetime at resonance. Relationships among permittivity, electric conductivity and refractive index are examined. Finally, a temperature dependent permittivity model is presented and is employed to predict temperature and non-linear field intensity dependence on commonly used plasmonic geometries, such as nanospheres.
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Affiliation(s)
| | - Salvatore Tuccio
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.
| | - Andrea Giugni
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.
| | - Andrea Toma
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.
| | - Carlo Liberale
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.
| | - Gobind Das
- Istituto Italiano di Tecnologia, Via Morego 30, Genova 16163, Italy.
| | | | - Enzo Di Fabrizio
- King Abdullah University of Science and Technology (KAUST), Physical Science and Engineering (PSE) Division, Biological and Environmental Science and Engineering (BESE) Division, Thuwal 23955-6900, Kingdom of Saudi Arabia.
- Bio-Nanotechnology and Engineering for Medicine (BIONEM), Department of Experimental and Clinical Medicine, University of Magna Graecia Viale Europa, Germaneto, Catanzaro 88100, Italy.
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16
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Paulite M, Blum C, Schmid T, Opilik L, Eyer K, Walker GC, Zenobi R. Full spectroscopic tip-enhanced Raman imaging of single nanotapes formed from β-amyloid(1-40) peptide fragments. ACS NANO 2013; 7:911-20. [PMID: 23311496 DOI: 10.1021/nn305677k] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
This study demonstrates that spectral fingerprint patterns for a weakly scattering biological sample can be obtained reproducibly and reliably with tip-enhanced Raman spectroscopy (TERS) that correspond well with the conventional confocal Raman spectra collected for the bulk substance. These provided the basis for obtaining TERS images of individual self-assembled peptide nanotapes using an automated, objective procedure that correlate with the simultaneously obtained scanning tunneling microscopy (STM) images. TERS and STM images (64 × 64 pixels, 3 × 3 μm²) of peptide nanotapes are presented that rely on marker bands in the Raman fingerprint region. Full spectroscopic information in every pixel was obtained, allowing post-processing of data and identification of species of interest. Experimentally, the "gap-mode" TERS configuration was used with a solid metal (Ag) tip in feedback with a metal substrate (Au). Confocal Raman data of bulk nanotapes, TERS point measurements with longer acquisition time, atomic force microscopy images, and an infrared absorption spectrum of bulk nanotapes were recorded for comparison. It is shown that the unique combination of topographic and spectroscopic data that TERS imaging provides reveals differences between the STM and TERS images, for example, nanotapes that are only weakly visible in the STM images, a coverage of the surface with an unknown substance, and the identification of a patch as a protein assembly that could not be unambiguously assigned based on the STM image alone.
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Affiliation(s)
- Melissa Paulite
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, ETH Zurich, 8093 Zurich, Switzerland
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