Raman spectroscopy

Silver nanoparticles (Ag NPs) were synthesized and characterized by transmission electron microscopy (TEM), X-ray powder diffraction (XRD), and absorption spectroscopy. Using Debye-Scherrer’s formula and the result of the XRD spectrum, the size of the Ag NPs was estimated at approximately 8 nm.

7p viengfa 28-10-2024 0 0   Download

In this paper, ZnO/CuO/Ag ternary composites were successfully synthesized by hydrothermal method using Zn(NO3)2.6H2O, Cu(NO3)2.3H2O and AgNO3. The composite samples were characterized using X-Ray diffraction (XRD), Scanning Electron Microscopy (SEM) and Raman spectroscopy.

8p viengfa 28-10-2024 2 0   Download

Reduced graphene oxide (Gr) has been synthesized electrochemically on the surface of copper metal at a fixed potential of 1.5 V versus a standard saturated calomel electrode (SCE). The synthesized Gr was then characterized with X-Ray diffraction, thermogravimetric analysis, raman and Fourier transform infrared (FT-IR) spectroscopies.

6p vikwong 29-09-2024 3 1   Download

In this study, in-situ method was applied for synthesizing silver-doped graphene oxide (Ag/GO). The material was extensively characterized by X-ray diffraction, Transmission electron microscopy, Scanning electron microscope, Raman spectroscopy, energy-dispersive X-ray spectroscopy, and UV-Vis spectroscopy.

6p vikwong 29-09-2024 4 1   Download

CuO nanoparticles were synthesized by alcohol-assisted hydrothermal method at various pH values, using sodium hydroxide as a precursor for pH control. The chemical composition, morphological and structural properties of the obtained CuO nanoparticles were investigated by the Raman and energy-dispersive X-ray spectroscopies, the field-emission scanning electron microscopy, and the X-ray diffraction.

12p dianmotminh02 03-05-2024 3 1   Download

Petrified wood samples are found within terrestrial sediments belonging to the Late Oligocene-Early Miocene Danişmen Formation in Malkara-Keşan located in the southwest of the Thrace Basin. The petrified wood in both regions is usually silicified and partly coalified. The silicification of the Tertiary wood in the Malkara-Keşan region is associated with volcanic activity and coeval sedimentation. Thin sections from petrified wood samples were taken as transverse, tangential, and radial sections.

22p tanmocphong 29-01-2022 24 1   Download

In this report, SERS substrates based on Ag-decorated TiO2 nanofibers electrospun on a glass substrate (Ag/TiO2/glass) were successfully prepared using electrospinning and photodeposition methods. XRD pattern demonstrated that the crystalline structure of TiO2 nanofibers (TiO2 NFs) consisted of both anatase and rutile phase.

9p meyerowitz 25-12-2021 10 0   Download

TiO2 nanocrystal powders have been prepared by sol-gel routes. By controlling pH, TiO2 nanoparticles of sizes ranging from 7 to 14 nm can be synthesized. X-ray diffraction (XRD) analysis indicated that both the anatase and the rutile phase appears in the powder when pH < 2.

6p tamynhan9 02-12-2020 29 4   Download

The shift in Raman and change in absorption spectra are evidence that would relate to the structure change or disorder and impurity in the samples. From the above results, a critical substituent content at which the structural phase change takes place is shown.

7p tamynhan8 04-11-2020 14 2   Download

This indicates that the Ce ion has an effect on the structure of ZnWO4 and suggests a solubility limit of Ce in ZnWO4 ceramics. In addition, we also calculated the Raman active modes by using group theory and we received 18 modes in Raman active and 16 modes in IR active. The absorption measurement indicates the band gap of ZnWO4 decreases with increasing Y content. The reasons for the above changes are discussed in this presentation.

5p tamynhan8 04-11-2020 17 1   Download

In this study, SnO2:Ni2 powders with dopant contents ranging from 0.0 to 12 mol% were synthesized by sol-gel method. The samples were characterized by X-ray diffraction (XRD) Raman spectroscopy, energy-dispersive X-ray spectrometer (EDS) and photoluminescense (PL) spectra.

8p tamynhan6 14-09-2020 30 2   Download

We report a facile process to fabricate cuprous thin films by thermal oxidation of copper substrates. Structure and phase identification were studied by X-ray diffraction measurement and Raman spectroscopy. Scanning electron microscopy was utilized to study surface morphology of the as-fabricated thin films and optical properties of the samples were investigated by diffused reflectance spectroscopy.

6p tamynhan6 14-09-2020 24 2   Download

The CdSe, type-II CdSe/CdTe core/shell and type-II/type-I CdSe/CdTe/ZnS core/shell/shell quantum dots (QDs) were successfully synthesized in a noncoordinating solvent. The phonon characterizations, optical properties and structures of the synthesized QDs were characterized by Raman scattering (RS) spectra, photoluminescence (PL) spectroscopy, PL-decay lifetime, absorption spectroscopy (Abs), and X-ray diffraction (XRD).

11p tamynhan6 14-09-2020 15 2   Download

Bài thuyết trình Phương pháp quang phổ Raman phân giải thời gian (Time-resolved Raman (TR ) spectroscopy) sau đây bao gồm những nội dung về đối tượng phân tích, nguyên lí đo thiết bị đo, ứng dụng của phương pháp quang phổ Raman phân giải thời gian.

8p maiyeumaiyeu10 17-09-2016 105 8   Download

Bài thuyết trình Vật lý ứng dụng: Matrix-Isolation Raman Spectroscopy đưa ra lịch sử, nguyên lý, thiết bị và ứng dụng của kỹ thuật MI (Matrix-Isolation). Mời các bạn tham khảo bài thuyết trình để hiểu rõ hơn về những nội dung này.

18p maiyeumaiyeu10 17-09-2016 65 2   Download

Bài thuyết trình Matrix – Isolation raman spectroscopy bao gồm những nội dung về kỹ thuật MI(Matrix-Isolation), phương pháp tổng hợp các phân tử mẫu MI, cấu tạo của thiết bị tạo mẫu MI, phổ MI Raman, ứng dụng của phổ MI Raman.

31p maiyeumaiyeu10 17-09-2016 68 5   Download

Bài giảng Phổ Raman sai phân giới thiệu tới các bạn những nội dung về xác định tỷ số khử phân cực, raman difference spectroscopy. Mời các bạn tham khảo bài giảng để bổ sung thêm kiến thức về lĩnh vực này. Với các bạn chuyên ngành Điện - Điện tử thì đây là tài liệu hữu ích.

8p maiyeumaiyeu09 16-09-2016 26 2   Download

A new functionalized conducting poly(5-hydroxy-1,4-naphthoquinone-co-5-hydroxy-3-acetic acid-1,4-naphthoquinone) with electroactive quinone group was studied by in situ Raman spectroscopy. The Raman results confirmed a good reversible transformation between two structures: quinoid and hydroquinoid ones during reduction-oxidation processes.

5p uocvong03 24-09-2015 29 3   Download

Titanium Silicalite-1 (TS-1) with different contents of titanium were prepared according to the procedure as described in our report [1]. IR, Raman, XRD spectroscopies were used to identify the structure and in-framework, extra-framework titanium ions of TS-1. It is proven that Laser Raman spectroscopy is the most effective method to study the synthesis of TS-1.

5p uocvong02 24-09-2015 70 4   Download

Vibrational spectroscopy (Micro-Raman and FT-Infrared) has been used to investigate Organically Modified Silicate (ORMOSIL) hybrid optical materials prepared by sol-gel process using methyltriethoxysilane (MTEOS) as precursor. FT-Infrared and UV-visible spectroscopies have been applied to estimate the quality of prepared materials.

5p uocvong01 24-09-2015 34 4   Download