Academic literature on the topic 'Micro-raman method'

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Journal articles on the topic "Micro-raman method"

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ZENG, JUN, PENG TAO, CHANGEN XU, SEN WANG, and JINCHENG XU. "A NOVEL METHOD FOR PREPARING ZnSnO NANOFIBERS." Modern Physics Letters B 23, no. 23 (2009): 2755–61. http://dx.doi.org/10.1142/s0217984909020825.

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This paper reports that ZnSnO nanofibers (ZSNFs) were synthesized by thermal oxidation of ZnSn alloys. ZnSn alloys were prepared by cold press and sintering (powder metallurgy). The structure and optical properties were characterized by X-ray diffraction (XRD), micro-Raman scattering technology, field emission scanning electron microscopy (FESEM) and photoluminescence (PL) spectrum. The micro-Raman scattering spectra of ZSNFs show four Raman peaks at 574, 1156, 1729 and 2330 cm-1. The diameter and length of ZSNFs are about 50 nm and 60 μm, respectively. The room temperature PL spectra of ZSNFs
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Zhang, Jingran, Yongda Yan, Zhenjiang Hu, and Xuesen Zhao. "Fabrication of copper substrates for surface-enhanced Raman scattering using the microscratching method." Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture 232, no. 7 (2016): 1310–15. http://dx.doi.org/10.1177/0954405416666908.

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The method of a tip-based microscratching is used to fabricate micro/nano structures on single crystal copper (110) and (111) planes under room temperature. The surface-enhanced Raman scattering enhancement performance of the structured Cu surface has been studied by rhodamine 6G probe molecules. Such micro/nano structures can be machined by varying the scratching parameters such as the feed and the normal load. Experimental results show that the high surface-enhanced Raman scattering enhancement is attributed to the nanostructures formed by pile-ups between adjacent grooves and nanocracks at
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Pavić, Ivan, Nediljko Kaštelan, Arkadiusz Adamczyk, and Mile Ivanda. "Enhancing Micro-Raman Spectroscopy: A Variable Spectral Resolution Instrument Using Zoom Lens Technology." Sensors 24, no. 13 (2024): 4284. http://dx.doi.org/10.3390/s24134284.

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Raman spectroscopy is a powerful analytical technique based on the inelastic scattering of photons. Conventional macro-Raman spectrometers are suitable for mass analysis but often lack the spatial resolution required to accurately examine microscopic regions of interest. For this reason, the development of micro-Raman spectrometers has been driven forward. However, even with micro-Raman spectrometers, high resolution is required to gain better insight into materials that provide low-intensity Raman signals. Here, we show the development of a micro-Raman spectrometer with implemented zoom lens
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Zhang, Chaoqiang, Ke Gao, Fei Wang, et al. "Strain Relaxation Effect on the Peak Wavelength of Blue InGaN/GaN Multi-Quantum Well Micro-LEDs." Applied Sciences 12, no. 15 (2022): 7431. http://dx.doi.org/10.3390/app12157431.

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In this paper, the edge strain relaxation of InGaN/GaN MQW micro-pillars is studied. Micro-pillar arrays with a diameter of 3–20 μm were prepared on a blue GaN LED wafer by inductively coupled plasma (ICP) etching. The peak wavelength shift caused by edge strain relaxation was tested using micro-LED pillar array room temperature photoluminescence (PL) spectrum measurements. The results show that there is a nearly 3 nm peak wavelength shift between the micro-pillar arrays, caused by a high range of the strain relaxation region in the small size LED pillar. Furthermore, a 19 μm micro-LED pillar’
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Mansurov, B., B. Medyanova, A. Kenzhegulov, et al. "Investigation of Microdiamonds Obtained by the Oxygen-Acetylene Torch Method." Eurasian Chemico-Technological Journal 19, no. 2 (2017): 163. http://dx.doi.org/10.18321/ectj647.

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The results of experiments on the synthesis of micro- and nano-diamonds by an oxy-acetylene torch on the surface of the pre-deposited copper thin films are presented in this article. The influence of thickness of a buffer copper film and the ratio of the concentrations of oxygen and acetylene on the structure of the deposited samples has been studied in the course of the conducted experiments. The studies by Raman scattering and scanning electron microscopy showed that the synthesis of micro- and nano-diamonds occurs under certain experimental conditions. From the results of the analysis of th
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Xu, Zongwei, Zhongdu He, Ying Song, et al. "Topic Review: Application of Raman Spectroscopy Characterization in Micro/Nano-Machining." Micromachines 9, no. 7 (2018): 361. http://dx.doi.org/10.3390/mi9070361.

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The defects and subsurface damages induced by crystal growth and micro/nano-machining have a significant impact on the functional performance of machined products. Raman spectroscopy is an efficient, powerful, and non-destructive testing method to characterize these defects and subsurface damages. This paper aims to review the fundamentals and applications of Raman spectroscopy on the characterization of defects and subsurface damages in micro/nano-machining. Firstly, the principle and several critical parameters (such as penetration depth, laser spot size, and so on) involved in the Raman cha
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Zhang, Jingran, Tianqi Jia, Xiaoping Li, et al. "Fabrication of nano/microstructures for SERS substrates using an electrochemical method." Beilstein Journal of Nanotechnology 11 (October 16, 2020): 1568–76. http://dx.doi.org/10.3762/bjnano.11.139.

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Based on an electrochemical method, three-dimensional arrayed nanopore structures are machined onto a Mg surface. The structured Mg surface is coated with a thin gold (Au) film, which is used as a surface-enhanced Raman scattering (SERS) substrate. A rhodamine 6G (R6G) probe molecule is used as the detection agent for the SERS measurement. Different sizes of arrayed micro/nanostructures are fabricated by different treatment time using the electrochemical process. The topographies of these micro/nanostructures and the thickness of the Au film have an influence on the Raman intensity of the Mg s
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Li, Qiu, Wei Qiu, Haoyun Tan, Jiangang Guo, and Yilan Kang. "Micro-Raman spectroscopy stress measurement method for porous silicon film." Optics and Lasers in Engineering 48, no. 11 (2010): 1119–25. http://dx.doi.org/10.1016/j.optlaseng.2009.12.020.

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Liu, Kun, Ji Sheng Yang, Rui Li, Wei Peng, and Shi Pan. "The Structural Characteristics of CIS Thin Films Prepared by Electro-Deposited Method." Advanced Materials Research 818 (September 2013): 88–91. http://dx.doi.org/10.4028/www.scientific.net/amr.818.88.

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The properties of the absorber layer of solar cell CuInSe2(CIS) thin film made by electro-depostied method were researched in this article. Different concentration of reactant and voltage was applied to prepare the CIS film. The micro-Raman spectroscopy and X-ray diffraction (XRD) of CIS film was carried out. A correlation between the linewidth A1 mode of Raman spectrum and the XRD line and the voltage of electro-deposition technology was found.
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Shin, Y. J., W. J. Kim, H. Y. Kim, and W. Bahng. "Dislocation Analysis of 4H-/6H-SiC Single Crystals Using Micro-Raman Spectroscopy." Materials Science Forum 740-742 (January 2013): 481–84. http://dx.doi.org/10.4028/www.scientific.net/msf.740-742.481.

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Micro-Raman spectroscopy is an excellent non-destructive analysis method, which compensates for disadvantages of KOH method. Raman shift of A1(LO) and E1(TO) band at threading screw dislocation(TSD) were investigated in n-type on/off-axis 4H- and 6H-SiC single crystal wafers by Micro-Raman scattering at room temperature. The results showed that A1(LO) band were shifted toward higher frequency while the E1(TO) band were shifted toward lower frequency on the on-axis wafers. The shifts are caused by increasing electron concentration and lattice disorder near the dislocation core, respectively. In
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Dissertations / Theses on the topic "Micro-raman method"

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Знаменщиков, Ярослав Володимирович, Ярослав Владимирович Знаменщиков, Yaroslav Volodymyrovych Znamenshchykov та ін. "Дослідження фазового складу полікристалічних плівок Cd1-xZnxTe методом мікро-раман". Thesis, Інститут фізики напівпровідників імені В.Є. Лашкарьова Національної Академії Наук України, 2017. http://essuir.sumdu.edu.ua/handle/123456789/65446.

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Товсті полікристалічні плівки CZT були отримані методом вакуумного термічного випаровування в квазізамкненому об’ємі, температура випарника складала 700°С, температура підкладки - 400°С. Для отримання плівок з різною концентрацією цинку проводилося випаровування суміші порошків CdTe та ZnTe, масове відношення яких змінювалося для кожної плівки.
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Kazour, Maria. "Active and passive biomonitoring tools for microplastics assessment in two highly polluted aquatic environments : case study of the Seine estuary and the Lebanese coast SOURCES OF MICROPLASTICS POLLUTION IN THE MARINE ENVIRONMENT: IMPORTANCE OF WASTEWATER TREATMENT PLANT AND COASTAL LANDFILL MICROPLASTICS POLLUTION ALONG THE LEBANESE COAST (EASTERN MEDITERRANEAN BASIN): OCCURRENCE IN SURFACE WATER, SEDIMENTS AND BIOTA SAMPLES JUVENILE FISH CAGING AS A TOOL FOR ASSESSING MICROPLASTICS CONTAMINATION IN ESTUARINE FISH NURSERY GROUNDS IS BLUE MUSSEL CAGING AN EFFICIENT METHOD FOR MONITORING ENVIRONMENTAL MICROPLASTICS POLLUTION?" Thesis, Littoral, 2019. http://www.theses.fr/2019DUNK0544.

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La production de plastique est en augmentation continue pour répondre à la forte demande mondiale. Cette production massive est la source d'importantes quantités de plastiques que l'on retrouve dans les milieux aquatiques. Parmi ces plastiques, les microplastiques (MP) (particules microscopiques d’une taille < 5 mm) se retrouvent dans l’eau, les sédiments et sont susceptibles d’être ingérés par divers organismes marins. Cette thèse se focalise sur (1) l’évaluation des sources et des apports de microplastiques au milieu aquatique et de leur présence dans les organismes, et (2) de tester la f
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Palacios, Higueras Raquel. "Fabrication and characterization of polymer micro- and nanostructures by template-based method." Doctoral thesis, Universitat Rovira i Virgili, 2010. http://hdl.handle.net/10803/8478.

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La fabricación de micro- y nanoestructuras orgánicas ha recibido un creciente interés debido a sus potenciales aplicaciones en campos como los sensores, las células solares y los diodos emisores de luz. En este trabajo, se ha desarrollado la técnica "template-based method", la cual consiste en la infiltración de un polímero en un molde poroso para obtener una estructura que sea su replica inversa. Dicha técnica ha sido utilizada empleando diferentes condiciones experimentales. El silicio macroporoso y la alumina nanoporosa han sido utilizados como moldes. Se fabricaron micro- y nanoestructuras
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Minniti, Zelica. "Advanced characterization methods of organic materials of environmental and historical-artistic relevance through Micro-FTIR Mapping and Raman Microscopy." Doctoral thesis, Università di Catania, 2012. http://hdl.handle.net/10761/959.

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For many centuries paper was the main material for recording cultural achievements all over the world. Paper is mostly made from cellulose with small amounts of organic and inorganic additives which allow its identification and characterization and may also contribute to its degradation. Prior to 1850, paper was made entirely from rags, using hemp, flax and cotton fibres. After this period, due to the enormous increase in demand, wood pulp began to be commonly used as raw material, resulting in a rapid degradation of paper. Spectroscopic techniques represent one of the most powerful tools to i
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MINNITI, ZELICA. "Advanced characterization methods of organic materials of environmental and historical-artistic relevance through Micro-FTIR Mapping and Raman Microscopy." Doctoral thesis, Università degli studi di Catania, 2012. http://hdl.handle.net/20.500.11769/490550.

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For many centuries paper was the main material for recording cultural achievements all over the world. Paper is mostly made from cellulose with small amounts of organic and inorganic additives which allow its identification and characterization and may also contribute to its degradation. Prior to 1850, paper was made entirely from rags, using hemp, flax and cotton fibres. After this period, due to the enormous increase in demand, wood pulp began to be commonly used as raw material, resulting in a rapid degradation of paper. Spectroscopic techniques represent one of the most powerful tools to i
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Prata, Joana Correia. "Development of analytical methodologies and toxicity testing of microplastics (METOXPLAS)." Doctoral thesis, 2021. http://hdl.handle.net/10773/33562.

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Microplastics (MP) are a class of anthropogenic contaminants comprising plastic <5 mm, which persist and pervade the environment, interacting with abiotic and biotic systems. Due to their diversity, the array of interactions, and lacking standardized methodologies, many knowledge gaps remain unaddressed despite the growth of published research. In aquatic systems, research in seawater, where MP were first found, is favored over freshwater environments under higher anthropogenic pressures. There is a need to determine the effects of current environmental concentrations of MP in aquatic e
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Book chapters on the topic "Micro-raman method"

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Choo-Smith, L. P., K. Maquelin, H. Ph Endtz, H. A. Bruining, and G. J. Puppels. "A novel method for rapid identification of micro-organisms using confocal Raman microspectroscopy." In Spectroscopy of Biological Molecules: New Directions. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4479-7_240.

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Sang, Sheng Bo. "New Method to Determine Young’s Modulus of Micro Crystal Based on Raman Spectrometer." In Defect and Diffusion Forum. Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-54-x.1.

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Verrier, Sophie, Alina Zoladek, and Ioan Notingher. "Raman Micro-Spectroscopy as a Non-invasive Cell Viability Test." In Methods in Molecular Biology. Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-108-6_19.

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Pontiggia, Luca, Hesham Yosef, Thomas Biedermann, and Ueli Moehrlen. "Characterization of Human Skin Derived Cells by Raman Micro-Spectroscopy." In Methods in Molecular Biology. Springer US, 2025. https://doi.org/10.1007/978-1-0716-4510-9_16.

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Hale, Robert C., Meredith E. Seeley, Ashley E. King, and Lehuan H. Yu. "Analytical Chemistry of Plastic Debris: Sampling, Methods, and Instrumentation." In Microplastic in the Environment: Pattern and Process. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-78627-4_2.

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AbstractApproaches for the collection and analysis of plastic debris in environmental matrices are rapidly evolving. Such plastics span a continuum of sizes, encompassing large (macro-), medium (micro-, typically defined as particles between 1 μm and 5 mm), and smaller (nano-) plastics. All are of environmental relevance. Particle sizes are dynamic. Large plastics may fragment over time, while smaller particles may agglomerate in the field. The diverse morphologies (fragment, fiber, sphere) and chemical compositions of microplastics further complicate their characterization. Fibers are of grow
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Priyadarshi, Gautam, Sagar Prajapati, and Mrugesh Trivedi. "Tools and Techniques to Analyse Microplastic Pollution in Aquatic and Terrestrial Ecosystems." In Microplastic Pollution: Causes, Effects and Control. BENTHAM SCIENCE PUBLISHERS, 2023. http://dx.doi.org/10.2174/9789815165104123010004.

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The estimation of microplastic pollution in the terrestrial and aquatic ecosystem is carried out by quantification and identification of the contaminated environment. Microplastic estimation consists of various steps such as sampling, visualization and quantification. Generally, the planktonic net, bongo net, manta net, and neuston net have been used for water sampling. While, grab samplers, tweezers, tablespoons, trowels, shovels, spatulas, or hand picking methods have been used for soil and sediment sampling. The biological sample from the study sites comprises the direct collection of the w
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Kovaleva, Elizaveta, and Dmitry A. Zamyatin. "Revealing microstructural properties of shocked and tectonically deformed zircon from the Vredefort impact structure: Raman spectroscopy combined with SEM microanalyses." In Large Meteorite Impacts and Planetary Evolution VI. Geological Society of America, 2021. http://dx.doi.org/10.1130/2021.2550(18).

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ABSTRACT Finite deformation patterns of accessory phases can indicate the tectonic regime and deformation history of the host rocks and geological units. In this study, tectonically deformed, seismically deformed, and shocked zircon grains from a granite sample from the core of the Vredefort impact structure were analyzed in situ, using a combination of Raman spectroscopy, backscatter electron (BSE) imaging, electron backscattered diffraction (EBSD) mapping, electron probe microanalyses (EPMA), energy-dispersive X-ray spectroscopy (EDS) qualitative chemical mapping, and cathodoluminescence (CL
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Mulevich, Giulietta S., and Thomas G. Spiro. "[16] Single-crystal micro-Raman spectroscopy." In Metallobiochemistry Part C: Spectroscopic and Physical Methods for Probing Metal Ion Environments in Metalloenzymes and Metalloproteins. Elsevier, 1993. http://dx.doi.org/10.1016/0076-6879(93)26018-5.

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Marey Mahmoud, Hussein. "Painting on Fibers." In Preservation and Restoration Techniques for Ancient Egyptian Textiles. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-4811-0.ch004.

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In ancient Egypt, color expressed both symbolic and aesthetic value. For decorating purposes, the ancient Egyptians used an intensive chromatic palette based on a broad source of natural and artificial origins. Beside dyeing, decorating textiles in ancient Egypt had different forms, such as embroidery or the painting of a smooth coating applied on the textile matrix. Physical analytical approaches are an essential request prior any restoration project. In this chapter, the benefits of a wide range of non- or micro-destructive methods to study the physiochemical behavior of pigments used in anc
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Singh, Arpita, Vilas A. Chavan, Ariya P, BVSS Udaynadh, and Erra Adithi. "NANOMATERIAL CHARACTERIZATION TECHNIQUES." In Futuristic Trends in Chemical Material Sciences & Nano Technology Volume 3 Book 13. Iterative International Publishers, Selfypage Developers Pvt Ltd, 2024. http://dx.doi.org/10.58532/v3becs13p1ch2.

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What nanotechnology is going to do? It is predicted that nanotechnology will alter how we live as it has already influenced the modern technology. Nanomaterials have sparked significant interest across many scientific and industrial areas because of their distinctive features and applications. Accurate characterization of nanoparticles is essential to comprehending their structure, properties and behavior as nanotechnology develops. Any technology that works with materials at the nanoscale and has different biological, chemical, and physical properties from those of the bulk is referred to as
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Conference papers on the topic "Micro-raman method"

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Liu, Weiwei, Liqiang Dong, Molin Qin, Wenxiang Fu, and Jinglin Kong. "Micro confocal Raman spectroscopy combined with chemometrics method for fast identification of bacteria." In Optical Spectroscopy and Applications, edited by Zongyin Yang. SPIE, 2024. https://doi.org/10.1117/12.3045774.

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Anderson, Jay, Michael K. F. Lo, Eoghan P. Dillon, and Mustafa Kansiz. "Automating Submicron IR Measurements for Failure Analysis." In ISTFA 2024. ASM International, 2024. http://dx.doi.org/10.31399/asm.cp.istfa2024p0346.

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Abstract Fast analysis of small organic contamination at the surface represents a major set of common microelectronics and semiconductor issues. Infrared (IR) microspectroscopy the workhorse for organic contamination is often limited to ~50µm and larger. Many labs move these samples from IR to Raman micro spectroscopy which should achieve higher spatial resolution down to 1µm using high NA objectives but routinely fails to achieve the chemical specificity of these organic contaminants. We will discuss a new IR method that provides organic contamination identification &amp;lt;1µm resolution. We
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Karmenyan, Artashes V., Denis A. Vrazhnov, Ekaterina A. Sandykova, et al. "Informative feature selection method for Raman micro-spectroscopy data." In XV International Conference on Pulsed Lasers and Laser Applications, edited by Victor F. Tarasenko, Anton V. Klimkin, and Maxim V. Trigub. SPIE, 2021. http://dx.doi.org/10.1117/12.2613966.

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Meydando, Taher, and Nazli Donmezer. "Performance Analysis of Micro-Raman Spectroscopy Models for Thermal Conductivity Calculation." In ASME 2021 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/ipack2021-73648.

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Abstract Micro-Raman spectroscopy has been preferred recently to measure the thermal conductivity of thin-films due to its nondestructive and non-contact nature. However, the thermal size effects originating from both localized heat generation from Raman laser and phonon scattering at boundaries may cause erroneous estimation of the thermal conductivities with the current approach. In this study, the gray phonon Boltzmann transport equation (BTE) is solved to improve the results of micro-Raman thermal conductivity measurements. Due to the frequency independence of single phonon mode in the gra
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Ewinger, Angela, Guenter Rinke, Sigrid Kerschbaum, Monika Rinke, and Klaus Schubert. "Raman-Spectroscopy for Measuring Chemical Reactions in Micro Reactors." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62089.

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Micro heat exchangers, micro mixers and micro reactors have gained importance in chemical, pharmaceutical and life sciences applications. Due to the large surface to volume ratio these devices provide efficient mass and heat transfer. This results in greater selectivity and higher yield for chemical reactions. The Institute for Micro Process Engineering is working on the development, manufacturing, and testing of micro channel devices mainly manufactured of stainless steel, where channel widths and depths lie in the range of 0.2 mm. In order to obtain a better understanding of the physical and
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Liu, Yuan, Jinyu Wang, Zhen Li, Jiqiang Wang, Yanong Ning, and Tongyu Liu. "Study on Raman Spectrum Detection Method Based on Surface Enhanced Micro-nano Fiber." In 2019 Photonics & Electromagnetics Research Symposium - Fall (PIERS - Fall). IEEE, 2019. http://dx.doi.org/10.1109/piers-fall48861.2019.9021494.

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Malekfar, R., M. Mozaffari, and S. Mihanyar. "Micro-Raman Scattering Spectroscopy of Nanocrystalline Phases of TiO2 Prepared by Sol-Gel Method." In NANOTECHNOLOGY AND ITS APPLICATIONS: First Sharjah International Conference on Nanotechnology and Its Applications. AIP, 2007. http://dx.doi.org/10.1063/1.2776709.

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Luo, Zhe, Han Liu, Yanhui Feng, Peide Ye, Yong P. Chen, and Xianfan Xu. "In-Plane Thermal Conductivity of Ultra-Thin Al2O3 Films Measured by Micro-Raman." In ASME 2013 Heat Transfer Summer Conference collocated with the ASME 2013 7th International Conference on Energy Sustainability and the ASME 2013 11th International Conference on Fuel Cell Science, Engineering and Technology. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/ht2013-17170.

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In the past decades, heat transport in thin film structures has been extensively studied due to its importance in performance optimization of micro/nano-scale devices. A large amount of heat is generated during the operation of electronic devices and must be dissipated efficiently via dielectric electrical insulating films, thus it is crucial to investigate and engineer the thermal properties of thin film structures. Numerous methods have been developed to measure thin film thermal conductivity, many of which took advantage of electrical heating and temperature sensing such as the 3ω method [1
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Onuki, Teppei, Shunsuke Kan, Wangpiao Lin, et al. "Investigation of Crystallographic Aspects of Subsurface Damage Induced by Grinding Using Micro-Raman Tomographic Imaging." In JSME 2020 Conference on Leading Edge Manufacturing/Materials and Processing. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/lemp2020-8514.

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Abstract The objective of this study is to propose and develop an evaluation method on the process damages of sapphire wafers, regarding crystallographic aspects of the damages by use of tomographic imaging techniques with laser Raman microscopy (called as micro Raman tomographic imaging: mRTI). In this paper, tomographic images with the peak width and the shift of the peak position were observed with mRTI, on c-plane cut sapphire wafers along a-plane, with micro fractures induced by brittle-mode grinding. Fractures along m-plane from the surface to 2–7 microns-depth, and fractures along r-pla
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Xu, Zhihong, Xiaosong Ge, Xueliang Lin, Wei Huang, Duo Lin, and Liqing Sun. "Comparative analysis of diagnostic efficiency of confocal micro-Raman spectroscopy and surface-enhanced Raman spectroscopy for nasopharyngeal carcinoma detection based on tissue smears method." In Asia Communications and Photonics Conference. OSA, 2016. http://dx.doi.org/10.1364/acpc.2016.af2a.38.

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