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Journal articles on the topic 'Micro-raman method'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

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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10

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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11

Ma, Jiaying, and Dor Ben-Amotz. "Rapid Micro-Raman Imaging Using Fiber-Bundle Image Compression." Applied Spectroscopy 51, no. 12 (1997): 1845–48. http://dx.doi.org/10.1366/0003702971939668.

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A new technique for rapid Raman imaging and chemical analysis of micro-composites and biomaterials, with potential applications in real-time robotic vision, automated manufacturing, and medical imaging, is described and demonstrated. The key feature of this new instrument is a fiber-optic bundle used to compress two-dimensional images onto a one-dimensional fiber stack, which serves as the entrance slit of an imaging optical spectrograph. Thus a complete Raman spectrum is simultaneously collected from every point within a sample in a single scan of a charge-coupled-device (CCD) detector. The m

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Lee, Hyungdong, Woojun Ye, Jaehyun Lee, Hyunggun Kim, and Doyoung Byun. "Silver Nanowire Micro-Ring Formation Using Immiscible Emulsion Droplets for Surface-Enhanced Raman Spectroscopy." Applied Sciences 10, no. 22 (2020): 8018. http://dx.doi.org/10.3390/app10228018.

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Precise and rapid detection of biomolecules is a fast-growing research theme in the field of biomedical engineering. Based on the surface-enhanced Raman scattering, micro/nano-scale structures composed of noble metals (e.g., gold and silver) play a critical role in plasmonics. However, it is still limited to structuring nanomaterials in a specific manner. Here, we investigated a novel surface-enhanced Raman spectroscopy (SERS) application using one-dimensional nanomaterials and micro-encapsulation methods. With the immiscible nature of fluids, the nanomaterials were properly captured inside a

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Prabakar, K., M. Raghuramaiah, S. Balasubramanian, Sagnik Midhya, P. Avinash, and S. Tripura Sundari. "Residual stress in underlying silicon at the fixed end of SiO2 microcantilevers — A micro-Raman study." Modern Physics Letters B 33, no. 01 (2019): 1850419. http://dx.doi.org/10.1142/s0217984918504195.

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In this work, nature of the residual stress developed in the convex corners created in underlying Si at the fixed end of SiO2 microantilevers (MCs) fabricated by wet chemical etching method was investigated using micro-Raman spectroscopy with visible excitation. It revealed the presence of tensile stress near the sharp edge of the convex corner and is attributed to the localized stress generated in the neighborhood of the discontinuities, acting as stress concentration region. Residual stress estimated by micro-Raman technique across the convex corner was also validated by FEM simulations. Mic

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Estevanes, Jared, Patrick Buzzini, and Geraldine Monjardez. "Forensic Analysis of Recrystallized Inorganic Oxidizing Salts Used in Pyrotechnic-Based Improvised Explosive Devices Using Light Microscopy and Micro-Raman Spectroscopy." Microscope 71, no. 1 (2024): 3–13. http://dx.doi.org/10.59082/indj3392.

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This study aimed to evaluate the advantages and challenges of analyzing post-blast pyrotechnic pipe bombs using a combination of light microscopy and micro-Raman spectroscopy. Two simulated improvised explosive devices (IEDs) were constructed and exploded using pyrotechnics as the main charge and consisted of several different components to simulate common materials that might be found in authentic bombing scenarios. In order to develop a rapid explosives residue recovery technique, a wet and dry swabbing process was compared to determine the most efficient swabbing method of recovery for inor

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Alvarez, Jose, Sagrario Martinez-Ramirez, and Elvira Martinez. "Magneto-Primed Triticale Seeds Studied by Micro-Raman Spectra." Plants 10, no. 6 (2021): 1083. http://dx.doi.org/10.3390/plants10061083.

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The spectroscopy technique of Micro-Raman is an appropriate method to investigate the microscopic structure of internally heterogeneous (i.e., composed of multiple layers) agro-food products. The effects of applying magnetic fields (magneto-priming technique) and imbibition on the chemical makeup of Triticale seed were studied, particularly in its pericarp, germ and endosperm parts, with the help of Micro-Raman. In light of the results obtained, the magneto-primed seeds soaked in water presented a greater number of chemical compounds than the control seeds, although those treatments were not a

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Ardila, A. M., O. Martínez, M. Avella, J. Jiménez, E. Gil-Lafon, and B. Gérard. "Optical Characterization of GaAs/Si Layers Grown by the Conformal Method (Confined Lateral Epitaxial Growth)." Journal of Materials Research 17, no. 6 (2002): 1341–49. http://dx.doi.org/10.1557/jmr.2002.0200.

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Optical studies of conformal GaAs layers grown on silicon substrates were carried out by cathodoluminescence, photoluminescence imaging, and micro-Raman spectroscopy. These techniques revealed, in the conformal GaAs layers, local variations of the luminescence intensity with the shape of stripes both parallel and perpendicular to the GaAs seed, associated with local variations of tensile stress. The cathodoluminescence and micro-Raman spectra suggest that this distribution of tensile stress plays an important role in the formation of mid-gap states responsible for the variations of the lumines

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Chang, Ying, Aixia Xiao, Rubing Li, et al. "Angle-Resolved Intensity of Polarized Micro-Raman Spectroscopy for 4H-SiC." Crystals 11, no. 6 (2021): 626. http://dx.doi.org/10.3390/cryst11060626.

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Raman spectroscopy is an indispensable method for the nondestructive testing of semiconductor materials and their microstructures. This paper presents a study on the angle-resolved intensity of polarized micro-Raman spectroscopy for a 4H silicon carbide (4H-SiC) wafer. A generalized theoretical model of polarized Raman intensity was established by considering the birefringence effect. The distributions of angle-resolved Raman intensities were achieved under normal and oblique backscattering configurations. Experiments were performed on a self-built angle-resolved Raman system, which verified t

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Karlen, Sylvain, Jean Gobet, Thomas Overstolz, Jacques Haesler, and Steve Lecomte. "Quantitative Micro-Raman Spectroscopy for Partial Pressure Measurement in Small Volumes." Applied Spectroscopy 71, no. 12 (2017): 2707–13. http://dx.doi.org/10.1177/0003702817724410.

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We demonstrate the quantitative capabilities of Raman confocal microscopy as a nondestructive method to measure the partial pressure of molecular gases in mm3 range sealed volume having an optical access. Thanks to a calibration procedure, we apply this technique for the characterization of the absolute nitrogen partial pressure inside buffered micro electromechanical system (MEMS) atomic vapor cells developed for atomic clocks. Our results are compared with measurements obtained by rubidium hyperfine frequency spectroscopy and a good agreement is demonstrated between the two methods, with a t

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Piluso, Nicolo’, Massimo Camarda, Ruggero Anzalone, and Francesco La Via. "4H-SiC Defects Analysis by Micro Raman Spectroscopy." Materials Science Forum 821-823 (June 2015): 335–38. http://dx.doi.org/10.4028/www.scientific.net/msf.821-823.335.

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Recently, a new Micro-Raman technique has been used to detect extended defects in 4H-SiC homoepitaxy. The method is based on the local increase of free carriers in undoped epitaxies (n < 1016 at/cm-3) produced by a high power laser. The Longitudinal optical Raman mode (LO) is coupled with the electronic plasma generated by the laser pumping; such a Raman signal is sensitive to crystallographic defects that lead to trapping (or dispersion) of the free carriers which results in a loss of coupling. The monitoring of the LOPC allows determining the spatial morphology of extended defects. The re

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Wang, Shuang, Jianhua Zhao, Harvey Lui, Qingli He, and Haishan Zeng. "A modular Raman microspectroscopy system for biological tissue analysis." Spectroscopy 24, no. 6 (2010): 577–83. http://dx.doi.org/10.1155/2010/592315.

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Raman spectroscopy has been used as a sensitive tool for studying biological tissue and evaluating disease. In many applications, microscopic level resolution spectral analysis is desirable. And this has been performed mostly by expensive commercial confocal micro-Raman systems. In this research, we present a simple method for building an economical and modular Raman microspectroscopy system that combines a microscope with a Raman spectrometer using an optical fiber bundle. The bundle with a circular collection end is positioned at an image plane of the microscope to collect Raman signals from

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Tsuda, H., and J. Arends. "Raman Spectroscopy in Dental Research: A Short Review of Recent Studies." Advances in Dental Research 11, no. 4 (1997): 539–47. http://dx.doi.org/10.1177/08959374970110042301.

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The Raman spectroscopic technique enables us to obtain vibrational (IR and far-IR) spectra of minerals by analyzing scattered light caused by (visible or near-visible) monochromatic laser excitation. The method possesses several advantages over IR absorption, including simple sample preparation, easy spectral/band analysis, and linear-response to mineral/chemical concentrations. In micro-Raman spectrometer systems, samples are positioned under an optical microscope, and specimens can be scanned with a lateral resolution (- 1 mm). In this paper, recent applications of micro-Raman spectroscopy a

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Lan Anh, Luu Thi. "TAILORING THE STRUCTURE AND MORPHOLOGY OF WO3 NANOSTRUCTURES BY HYDROTHERMAL METHOD." Vietnam Journal of Science and Technology 56, no. 1A (2018): 127. http://dx.doi.org/10.15625/2525-2518/56/1a/12513.

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Tungsten oxide nanostructures were synthesized by hydrothermal and acid precipitation (hydrothermal at room temperature) methods without using any supporting agent or structure-directing reactant. The morphology and crystalline structure of nanostructures strongly depended on pH of the precursor solution and synthesis method. With pH = -1.0, using acid precipitation method, orthorhombic nanoplate was observed. Using hydrothermal method, with the pH = - 1.0, we obtained directly stable monoclinic nanoparticle WO3. With pH = 1.1, the mixing of nanoparticle and nanorod with the hexagonal frame wa

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Fu, Da You, Dong Yuan, Xiao Fang Zhang, and Xin Zhao. "Fast Detection of Illegal Sweeteners in Liquor and Wine by Laser Raman Spectroscopy." Advanced Materials Research 960-961 (June 2014): 32–38. http://dx.doi.org/10.4028/www.scientific.net/amr.960-961.32.

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Efficient method was proposed for the qualitative detection of 6 illegal sweeteners in commercial liquor and wine by laser Raman spectroscopy. The method was based on the comparative analysis of Raman spectrogram of pure sweeteners and alcohol samples. For the 6 kinds of sweeteners tested, saccharin sodium, acesulfame potassium impurity and cyclamate, were present as additives in the samples. The results showed that the proposed method was fast and simple with high repeatability and sensitivity, and needed little samples and cost less. Keywords: Sweeteners, Qualitative Analysis, Micro-Laser Ra

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Sang, Sheng Bo. "New Method to Determine Young’s Modulus of Micro Crystal Based on Raman Spectrometer." Defect and Diffusion Forum 272 (March 2008): 1–6. http://dx.doi.org/10.4028/www.scientific.net/ddf.272.1.

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With the development of MEMS, the mechanical properties of micro crystals must to be determined to know the defect, reliability and characterization of MEMS. Young’s modulus is one of the most important properties, which indicates the ability of resisting the elastic deformation. Many methods, such as natural frequency measurement, beam bending tests, membrane bulge test and uniaxial tension test, have been used to measure Young’s modulus of Si, SiN and metals. But there are some limitations when they are used to measure micro crystals in MEMS. This paper puts forward a high accuracy and conve

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LIU, YANDE, YU SHI, LIJUN CAI, YONG HAO, and CHUNJIANG ZHAO. "DETERMINATION OF COPPER, ZINC, CADMIUM AND LEAD IN WATER USING CO-PRECIPITATION METHOD AND RAMAN SPECTROSCOPY." Journal of Innovative Optical Health Sciences 06, no. 03 (2013): 1350021. http://dx.doi.org/10.1142/s1793545813500211.

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Mn co-precipitation method combined with Raman spectroscopy were used to determine trace heavy metals (copper, zinc, cadmium and lead) in water sample. Different concentrations of heavy metals including copper, zinc, cadmium and lead in water samples were separated and enriched by Mn 2+-phen-SCN- ternary complex co-precipitation procedure. The Raman spectra of co-precipitation sediments were collected using confocal micro-Raman spectrometry. Different preprocessing treatments and regression calibration methods were compared. The best models using partial least squares regression (PLS) of coppe

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Yu, Shihua, Zhigang Liu, Hongwei Li, et al. "Combination of a graphene SERS substrate and magnetic solid phase micro-extraction used for the rapid detection of trace illegal additives." Analyst 143, no. 4 (2018): 883–90. http://dx.doi.org/10.1039/c7an01547j.

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Surface enhanced Raman scattering (SERS) is an ultra-sensitive spectroscopy technique, which can provide rich structural information for a great number of molecules, while solid phase micro-extraction (SPME) is an efficient method for sample pretreatment in analytical chemistry, particularly in a micro-system.

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Tang, Xiao. "Spectrochemical Technology in Nanomaterial Preparation and Art Appraisal Technology Research." Journal of Chemistry 2020 (October 12, 2020): 1–8. http://dx.doi.org/10.1155/2020/6938324.

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With the rapid development of science and technology in micro/nanofield, it is urgent to carry out the research on new technology of micro/nanomechanics test and multiscale-related experimental mechanical analysis method. There is still a lot of work to be done in the basic theory and analysis method of micro-Raman spectroscopy as a new microscale mechanical test method applied to the experimental research of material mechanics. Based on the above background, the purpose of this paper is the application of spectrochemical technology in the preparation of nanomaterials and art identification te

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Sakurai, Toshimitsu, Hiroshi Ohno, Shinichiro Horikawa, Yoshinori Iizuka, Tsutomu Uchida, and Takeo Hondoh. "A Technique for Measuring Microparticles in Polar Ice Using Micro-Raman Spectroscopy." International Journal of Spectroscopy 2010 (August 18, 2010): 1–7. http://dx.doi.org/10.1155/2010/384956.

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We describe in detail our method of measuring the chemical forms of microparticles in polar ice samples through micro-Raman spectroscopy. The method is intended for solid ice samples, an important point because melting the ice can result in dissociation, contamination, and chemical reactions prior to or during a measurement. We demonstrate the technique of measuring the chemical forms of these microparticles and show that the reference spectra of those salts expected to be common in polar ice are unambiguously detected. From our measurements, Raman intensity of sulfate salts is relatively high

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Osticioli, Iacopo, Angela Zoppi, and Emilio Mario Castellucci. "Shift-Excitation Raman Difference Spectroscopy—Difference Deconvolution Method for the Luminescence Background Rejection from Raman Spectra of Solid Samples." Applied Spectroscopy 61, no. 8 (2007): 839–44. http://dx.doi.org/10.1366/000370207781540169.

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The feasibility of the shift-excitation Raman difference spectroscopy–difference deconvolution (SERDS-DDM) method for fluorescence suppression from Raman spectra of solid samples is discussed. For SERDS measurements a tunable diode laser source with an emission band centered at 684 nm is coupled to a conventional micro-Raman apparatus and a monochromator device is used for checking the excitation frequency stability. The shifted Raman spectra are then mathematically treated and a deconvolution procedure is used to reconstruct the Raman spectrum devoid of fluorescence. Two different cases are p

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Gardiner, Derek J., and Michael Bowden. "Raman mapping and imaging using microline focus spectromety (MiFS)." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (1992): 1510–11. http://dx.doi.org/10.1017/s0424820100132182.

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Early attempts to obtain Raman images relied upon illuminating the whole field of view with laser light, wavelength selecting the scattered light and imaging it onto a vidicon type TV detector. This method had several limitations, principally with sensitivity and inability to deal with fluorescence interference. Improvements have been made to this general approach, by the use of interference filters to select the required portion of the Raman spectrum for specific images and the possibilities of using Hadamard transform spectroscopy to produce micro-Raman images have been explored. Alternative

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Fan, Siqing, Yong Huang, Puxin Gao, and Chunsong Cheng. "Novel Growth Age Characterization for Fresh Herbal Ginseng Based on Quantitative Counting of the Calcium Oxalate Crystals through FEG-ESEM." Applied Sciences 11, no. 18 (2021): 8389. http://dx.doi.org/10.3390/app11188389.

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To reveal the accumulation of the calcium oxalate crystals (COH Crystals) during the growth and development of the taproot of Panax ginseng, and develop a novel and rapid characterization method to evaluate the growth age of commercial ginseng, multiple methods in micro characterization techniques of SAXS, Micro-CT, FEG-ESEM and Micro-Raman were used to identify the COH Crystals and establish a quantitative counting method for growth age identification. In this study, a cross-analysis with multiple methods proved for the first time with a Raman and Energy spectrum that the high-density particl

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Abrego, Zuriñe, Nagore Grijalba, Nora Unceta, et al. "A novel method for the identification of inorganic and organic gunshot residue particles of lead-free ammunitions from the hands of shooters using scanning laser ablation-ICPMS and Raman micro-spectroscopy." Analyst 139, no. 23 (2014): 6232–41. http://dx.doi.org/10.1039/c4an01051e.

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Zhang, Xiaodong, Fei Bian, Yafei Wang, Lian Hu, Ning Yang, and Hanping Mao. "A Method for Capture and Detection of Crop Airborne Disease Spores Based on Microfluidic Chips and Micro Raman Spectroscopy." Foods 11, no. 21 (2022): 3462. http://dx.doi.org/10.3390/foods11213462.

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Airborne crop diseases cause great losses to agricultural production and can affect people’s physical health. Timely monitoring of the situation of airborne disease spores and effective prevention and control measures are particularly important. In this study, a two-stage separation and enrichment microfluidic chip with arcuate pretreatment channel was designed for the separation and enrichment of crop disease spores, which was combined with micro Raman for Raman fingerprinting of disease conidia and quasi identification. The chip was mainly composed of arc preprocessing and two separated enri

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Dong, Guo Bo, Bi Ben Wang, Mei Wang, Jing Wang, and Hua Li. "Raman Scattering from ZnTe Nanocrystals Depending on Different Excitation Wavelengths." Key Engineering Materials 538 (January 2013): 34–37. http://dx.doi.org/10.4028/www.scientific.net/kem.538.34.

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ZnTe nanocrystals were synthesized in NaOH solution by hydrothermal method and they were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and micro-Raman spectroscopy. The results indicate that the ZnTe nanocrystals were crystallized in cubic zincblende structure and their morphologies and sizes are polyhedron and diversified, respectively. The Raman results show that different scattering occurred from the ZnTe nanocrystals depending different excitation wavelengths. According to theories related to band-gap and Raman scattering, the excitation wavelength-depend

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De-Paula, Diego Martins, Alessandro D. Loguercio, Alessandra Reis, et al. "Micro-Raman Vibrational Identification of 10-MDP Bond to Zirconia and Shear Bond Strength Analysis." BioMed Research International 2017 (2017): 1–7. http://dx.doi.org/10.1155/2017/8756396.

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So far, there is no report regarding the micro-Raman vibrational fingerprint of the bonds between 10-methacryloyloxy-decyl dihydrogen phosphate (10-MDP) and zirconia ceramics. Thus, the aim of this study was to identify the Raman vibrational peaks related to the bonds of 10-MDP with zirconia, as well as the influence on microshear bond strength. Micro-Raman spectroscopy was employed to assess the vibrational peak of 10-MDP binding to zirconia. Microshear bond strength of the dual-cure resin cement to zirconia with the presence of 10-MDP in composition of experimental ceramic primer and self-ad

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You, Ting, Wei Liu, Yang Sha, and Weiyu Cao. "Synchrotron study on the evolution of the radial structural distribution of carbon fiber monofilaments during heat treatment process." RSC Advances 10, no. 31 (2020): 18252–58. http://dx.doi.org/10.1039/d0ra02317e.

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Evolution of the radial distribution of the crystalline structure within PAN monofilaments during carbonization was investigated via the method of synchrotron diffraction and micro-scanning Raman spectroscopy.

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Rakhmatullaev, I., O. Tursunkulov, X. Nazarov, et al. "STUDY OF SURFACE MORPHOLOGY AND STRUCTURAL PROPERTIES OF TITANIUM DIOXIDE MICROPOWDERS." Journal of Science and Innovative Development 4, no. 4 (2021): 72–83. http://dx.doi.org/10.36522/2181-9637-2021-4-7.

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The surface morphology and structural properties of titanium dioxide micro-powders have been investigated by scanning electron microscopy and Raman spectroscopy. The Raman scattering was excited by the green line of a copper vapor laser (λ = 510.6 nm) which operates in a repetitively pulsed mode. Powders, consisting of close-packed particles in the form of spherical particles of specified sizes (29-63 μm), were investigated. The recorded Raman spectra of titanium dioxide powders were characterized by an anomalously high intensity, which was associated with trapping of exciting radiation in the

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Husairi, Fadzilah Suhaimi, S. A. M. Zobir, Mohamad Rusop, and Saifolah Abdullah. "The Structural Properties of Carbon Nanotubes Grown on Porous Silicon-Based Materials by Thermal Chemical Vapor Deposition Method." Advanced Materials Research 686 (April 2013): 28–32. http://dx.doi.org/10.4028/www.scientific.net/amr.686.28.

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In this paper, carbon nanotubes on porous silicon substrate were developed in order to get high quality nanotubes for various kind of application. CNTs were deposited on porous silicon nanostructures (PSiN) at 750 0C on porous silicon by using double-furnace thermal chemical vapor deposition technique. Align carbon nanotubes with diameters of 15 to 30 nm were successfully synthesized on a porous silicon substrate. In this system, carbon nanotubes were grown directly on the p-type porous silicon surface at 750 0C for a total time of 30 minutes. The samples were characterized using field emissio

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Husairi, F. S., S. A. M. Zobir, Mohamad Rusop Mahmood, and Saifollah Abdullah. "The Structural Properties of Carbon Nanotubes Grown on Porous Silicon-Based Materials by Thermal Chemical Vapor Deposition Method." Advanced Materials Research 667 (March 2013): 477–81. http://dx.doi.org/10.4028/www.scientific.net/amr.667.477.

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In this paper, carbon nanotubes on porous silicon substrate were developed in order to get high quality nanotubes for various kind of application. CNTs were deposited on porous silicon nanostructures (PSiN) at 750 0C on porous silicon by using double-furnace thermal chemical vapor deposition technique. Align carbon nanotubes with diameters of 15 to 30 nm were successfully synthesized on a porous silicon substrate. In this system, carbon nanotubes were grown directly on the p-type porous silicon surface at 750 0C for a total time of 30 minutes. The samples were characterized using field emissio

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Nelson, Gilbert L., Amanda M. Lines, Amanda J. Casella, Job M. Bello, and Samuel A. Bryan. "Development and testing of a novel micro-Raman probe and application of calibration method for the quantitative analysis of microfluidic nitric acid streams." Analyst 143, no. 5 (2018): 1188–96. http://dx.doi.org/10.1039/c7an01761h.

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To simplify and improve the safety of reprocessing nuclear fuel, the Micro-Raman technique was applied at the microfluidic scale with a view toward the on-line spectroscopic measurement of radioactive solutions.

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Ould-Abbas, Amaria, Mama Bouchaour, and Nasr-Eddine Chabane Sari. "Study of Thermal Conductivity of Porous Silicon Using the Micro-Raman Method." Open Journal of Physical Chemistry 02, no. 01 (2012): 1–6. http://dx.doi.org/10.4236/ojpc.2012.21001.

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Islam, Md Rafiqul, Prabhat Verma, Masayoshi Yamada, Masami Tatsumi, and Kyoichi Kinoshita. "Micro-Raman Characterization of Starting Material for Traveling Liquidus Zone Growth Method." Japanese Journal of Applied Physics 41, Part 1, No. 2B (2002): 991–95. http://dx.doi.org/10.1143/jjap.41.991.

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Bersani, Andò, Scrocco, et al. "Composition of Amphiboles in the Tremolite–Ferro–Actinolite Series by Raman Spectroscopy." Minerals 9, no. 8 (2019): 491. http://dx.doi.org/10.3390/min9080491.

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Amphiboles are an important family of rock forming minerals, whose identification is crucial in provenance studies as well as in many other fields of geology, archaeology and environmental sciences. This study is aimed to find a quick way to characterize Ca-amphiboles in the tremolite (Ca2Mg5Si8O22(OH)2)–ferro–actinolite (Ca2Fe5Si8O22(OH)2) series. Raman spectroscopy is established as technique to perform non-destructive and quick analysis, with micrometric resolution, able to give the composition in terms of Mg/(Mg + Fe2+) ratio. To exploit the method, a preliminary characterization is perfor

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Stöckel, S., W. Schumacher, S. Meisel, M. Elschner, P. Rösch, and J. Popp. "Raman Spectroscopy-Compatible Inactivation Method for Pathogenic Endospores." Applied and Environmental Microbiology 76, no. 9 (2010): 2895–907. http://dx.doi.org/10.1128/aem.02481-09.

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ABSTRACT Micro-Raman spectroscopy is a fast and sensitive tool for the detection, classification, and identification of biological organisms. The vibrational spectrum inherently serves as a fingerprint of the biochemical composition of each bacterium and thus makes identification at the species level, or even the subspecies level, possible. Therefore, microorganisms in areas susceptible to bacterial contamination, e.g., clinical environments or food-processing technology, can be sensed. Within the scope of point-of-care-testing also, detection of intentionally released biosafety level 3 (BSL-3

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Voyiatzis, George A., and Konstantinos S. Andrikopoulos. "Fast Monitoring of the Molecular Orientation in Drawn Polymers Using Micro-Raman Spectroscopy." Applied Spectroscopy 56, no. 4 (2002): 528–35. http://dx.doi.org/10.1366/0003702021954999.

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A new method is proposed for the estimation of the segmental orientation of vinyl or vinylidene polymers of moderate crystallinity by acquisition of only one Raman spectrum at a specific polarization geometry. A highly anisotropic rigid rod or/and resonant Raman-active guest-agent incorporated into a host-polymer can be easily detected at low concentration levels and can be used as an indicator of the molecular orientation of the processed host-polymer. A suitable polarized Raman measurement and the automatic calculation of the ratio of two Raman bands, one sensitive and another roughly nonsen

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Boudart, Bertrand, and Yannick Guhel. "Measuring Temperature in GaN HEMTs: An Approach Based on Raman Spectroscopy." EDFA Technical Articles 21, no. 2 (2019): 10–14. http://dx.doi.org/10.31399/asm.edfa.2019-2.p010.

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Abstract This article describes a new technique for measuring temperatures in GaN HEMTs. The method is based on Raman spectroscopy and the use of cerium oxide particles that act like micro-Raman thermometers when scanned with a UV laser. As the article explains, phonon line shifts due to Raman scattering are used to estimate the temperature of GaN layers while surface temperatures are obtained through the cerium oxide particles. The results presented also verify that the particles, which are distributed over semiconductor and metal surfaces, do not modify the electric characteristics of the Ga

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Gurushankar, K., M. Grishina, M. Gohulkumar, and K. Kannan. "Computational and experimental studies on SnO2 thin films at various temperatures." Computer Optics 47, no. 1 (2023): 53–61. http://dx.doi.org/10.18287/2412-6179-co-1151.

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Tin oxide (SnO2) thin films was prepared by dip-coating technique at various bath temperatures (313, 333, 353 and 373 K) and annealed at 673 K in this study. And the obtained results were studied and correlated with the computational method. Scanning electron microscopy (SEM) investigation demonstrated that the prepared samples are spherical with agglomeration. The elemental analysis (EDAX) confirms the presence of Sn and O. Further, the SnO2 thin films microstructures are simulated, their thermodynamic and surface properties have been calculated. Micro-Raman spectra were recorded for the prep

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Marinova, M., M. Baleva та G. Zlateva. "Resonant Raman and Micro-Raman Scattering from Si Matrix with Unburied β-FeSi2 Nanolayers". Journal of Nanoscience and Nanotechnology 8, № 2 (2008): 775–79. http://dx.doi.org/10.1166/jnn.2008.a055.

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Samples, representing Si matrix with nanolayers of the semiconducting β-FeSi2 silicide are studied by Raman scattering. The unpolarized Raman spectra of the samples are measured in two different configurations. It is found that the characteristic β-FeSi2 Raman modes are seen in the spectra, taken at incident angle of about 45°, while only comparatively intensive broad feature is detected in a back-scattering geometry. The difference in the spectra is interpreted with the appearance of surface polariton modes of the optical phonons in the nanosized layers in near back-scattering geometry. The r

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Dev, Kapil, Chris Jun Hui Ho, Renzhe Bi, et al. "Machine Learning Assisted Handheld Confocal Raman Micro-Spectroscopy for Identification of Clinically Relevant Atopic Eczema Biomarkers." Sensors 22, no. 13 (2022): 4674. http://dx.doi.org/10.3390/s22134674.

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Atopic dermatitis (AD) is a common chronic inflammatory skin dermatosis condition due to skin barrier dysfunction that causes itchy, red, swollen, and cracked skin. Currently, AD severity clinical scores are subjected to intra- and inter-observer differences. There is a need for an objective scoring method that is sensitive to skin barrier differences. The aim of this study was to evaluate the relevant skin chemical biomarkers in AD patients. We used confocal Raman micro-spectroscopy and advanced machine learning methods as means to classify eczema patients and healthy controls with sufficient

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Ma, Li, Chun-Hua Zhou, Bo Yang, Xu Han, and Ying-Chun Cui. "Spatial distribution and content detection of gefitinib in tablets using confocal micro-raman spectroscopy mapping." Materials Express 10, no. 9 (2020): 1444–51. http://dx.doi.org/10.1166/mex.2020.1760.

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In this study, we aim at establishing a method to evaluate the spatial distribution and content of gefitinib in tablets without destroying the tablets. The content of gefitinib tablets was determined by HPLC. Using confocal micro-Raman spectroscopy, with a wavelength of 785 nm and power of 10%, gefitinib, starch, and hydrated magnesium silicate were scanned. Tablets with five concentrations of gefitinib (15.63–31.25%) were scanned with a 1000 × 1000 μm spectral resolution and live video imaging was performed. The surfaces of gefitinib tablets were scanned and images were obtained by a continuo

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