Evaluation of Spatial Alignment of Kerogen in Shale Using High-Resolution Transmission Electron Microscopy, Raman Spectroscopy, and Fourier Transform Infrared

2018 ◽  
Vol 32 (10) ◽  
pp. 10616-10627 ◽  
Author(s):  
Yu Liu ◽  
Yanming Zhu ◽  
Shangbin Chen ◽  
Yang Wang ◽  
Yu Song
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Raman Spectroscopy ◽  
Fourier Transform ◽  
High Resolution ◽  
Fourier Transform Infrared ◽  
Spatial Alignment ◽  
Transmission Electron

Study of Triangle-Shaped Defects on Nearly On-Axis 4H-SiC Substrates

2016 ◽  
Vol 858 ◽  
pp. 225-228 ◽  
Author(s):  
Ren Wei Zhou ◽  
Xue Chao Liu ◽  
Hui Jun Guo ◽  
H.K. Kong ◽  
Er Wei Shi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Raman Spectroscopy ◽  
High Resolution ◽  
Optical Microscopy ◽  
Epitaxial Growth ◽  
Surface Defects ◽  
Micro Raman Spectroscopy ◽  
Transmission Electron

Triangle-shaped defects are one of the most common surface defects on epitaxial growth of 4H-SiC epilayer on nearly on-axis SiC substrate. In this paper, we investigate the feature and structure of such defects using Nomarski optical microscopy (NOM), micro-Raman spectroscopy and high resolution transmission electron microscopy (HR-TEM). It is found that triangle-shaped defects were composed of a thick 3C-SiC polytype, as well as 4H-SiC epilayer.

Preparation of carbon nanotubes/porous polyimide composites for effective adsorption of 2,4-dichlorophenol

RSC Advances ◽  
2016 ◽  
Vol 6 (98) ◽  
pp. 95825-95835 ◽  
Author(s):  
Hui Yuan ◽  
Qing liang You ◽  
Lin Jie Song ◽  
Gui ying Liao ◽  
Hua Xia ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotubes ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Thermogravimetric Analysis ◽  
Fourier Transform Infrared ◽  
Transmission Electron ◽  
Infrared Spectrometer ◽  
Polyimide Composites ◽  
Adsorption Desorption

The carbon nanotubes (CNT)/polyimide (PI) composites were prepared by blending and characterized by Fourier transform infrared spectrometer (FTIR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and N2adsorption–desorption.

scholarly journals Sintesis Nanopartikel Nickel Ferrite (NiFe2O4) dengan Metode Kopresipitasi dan Karakterisasi Sifat Kemagnetannya (Halaman 20 s.d. 25)

2015 ◽  
Vol 19 (56) ◽  
Author(s):  
Muflihatun ◽  
Siti Shofiah ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Nickel Ferrite ◽  
Fourier Transform Infrared ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Nanopartikel Nikel Ferit (NiFe2O4) telah disintesis dengan metode kopresipitasi dengan memvariasi konsentrasi NaOH dan suhu sintesis. Struktur kristal, ukuran partikel, dan morfologi dari sampel dianalisa menggunakan X-ray diffraction (XRD) dan transmission electron microscopy (TEM). Ukuran butir pada konsentrasi NaOH 3, 5, dan 10 M masing-masing adalah 5,7; 4,3; dan 4,2 nm, sedangkan pada suhu 60, 80, dan 150°C berturut-turut adalah 4,2; 4,9; dan 5,5 nm. Analisa fourier transform infrared (FTIR) menunjukkan dua puncak serapan pada rentang ~400-600 cm-1 yang terkait dengan site oktahedral dan tetrahedral pada struktur NiFe2O4. Sifat magnetik NiFe2O4 hasil analisa vibrating sample magnetometer (VSM) menunjukkan bahwa sampel berperilaku ferromagnetik dengan nilai koersivitasnya pada rentang 42-47 Oe. Sampel dengan variasi konsentrasi NaOH, koersivitasnya cenderung menurun dengan menurunnya ukuran partikel. Sementara sampel dengan variasi suhu, semakin kecil ukuran partikel, koersivitasnya cenderung meningkat. Pada 15 kOe, nilai magnetisasi terbesar (6,17 emu/g) diperoleh pada sampel dengan rasio fasa α-Fe2O3 paling rendah.

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