Doping of C60 Films Using High Energy Boron Ion Implantation

1994 ◽  
Vol 359 ◽  
Author(s):  
Zhong-Min Ren ◽  
Yuan-Cheng Du ◽  
Xia-Xing Xiong ◽  
Zhi-Feng Ying ◽  
Fu-Ming Li ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Ion Implantation ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dose Ranging ◽  
Implantation Process ◽  
Almost All ◽  
C60 Films ◽  
Beam Deposition

ABSTRACTC60 films, which are deposited by partially ionized beam deposition (PIBD), are doped by 100 keV boron ion implantation at dose ranging from 3*1014 to 1*1016 cm2 The implantation process has been studied using Fourier transform infrared spectroscopy (FTIR), Raman spectra and X-ray diffraction (XRD) analyses. Almost all C60 soccer-balls in the doped region in the films are found to be broken at dose of 1*1016 cm2, while at dose less than 6*1014 cm2 a few C60 molecules remain undestroyed and maintain the original structural properties.

Ion Implantation Defect Characterization by High-Resolution X-Ray Diffraction

1992 ◽  
Vol 262 ◽  
Author(s):  
Jos G.E. Klappe ◽  
István Bársony ◽  
Tom W. Ryan
Keyword(s):  
High Resolution ◽  
Ion Implantation ◽  
Lattice Strain ◽  
Crystalline Silicon ◽  
High Energy ◽  
Silicon Sample ◽  
Dislocation Loops ◽  
X Ray Diffraction ◽  
X Ray ◽  
Residual Defect

ABSTRACTHigh-energy ion-implantation is one of the roost critical processing steps regarding the formation of defects in mono-crystalline silicon. High- as well as low-doses implanted at various energies can result in relatively high residual defect concentrations after post-implantation annealing.Before annealing, the crystal lattice strain is mainly caused by the point defects. After annealing, the accommodation of substitutional impurities is the main origin of the residual lattice strain. High-Resolution X-ray Diffraction (HRXD) has been frequently used for the characterization of these structures. Dislocation loops formed during the high temperature step, however, cause enhanced diffuse X-ray scattering, which can dominate the measured X-ray intensity in conventional HRXD.Triple axis diffractometry is used in this study to analyze the size, type and location of defects in a boron implanted and rapid thermally annealed silicon sample.

scholarly journals Quantifying Damage Accumulation Using State-of-the-Art FFT Method

2011 ◽  
Vol 702-703 ◽  
pp. 515-518
Author(s):  
Reeju Pokharel ◽  
S. F. Li ◽  
J. Lind ◽  
C. M. Hefferan ◽  
U. Lienert ◽  
...  
Keyword(s):  
Plastic Deformation ◽  
Fourier Transform ◽  
Damage Accumulation ◽  
State Of The Art ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
3D Microstructure ◽  
Schmid Factor ◽  
Diffraction Microscopy

A 3D microstructure, measured by high-energy x-ray diffraction microscopy, is used as an input to a parallelized viscoplastic Fast Fourier Transform code (VPFFT) to simulate a tensile test. Distributions of strain, damage accumulation, neighbor interactions, and Schmid factor mismatch throughout the microstructure are calculated. These results will form the basis of a direct comparison to microstructure maps that track plastic deformation in the real sample.

Effect of STAC on Structure of Biotite when Biotite Transform to Hydrated Ba-Mica

2016 ◽  
Vol 723 ◽  
pp. 567-571
Author(s):  
Yu Wei ◽  
Zhi Liang Huang ◽  
Xiao Yu Huang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Interlayer Spacing ◽  
Basal Spacing ◽  
Trimethylammonium Chloride ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structure Changes ◽  
Almost All ◽  
Long Chain

After Ba2+/K+ ion exchange, hydrated Ba2+ replaced K+ from interlayer spacing of biotite. original biotite transformed to vermiculite-type hydrated Ba-mica. in order to study the effect of long-chain alkylammonium on biotite after structure changes, biotite, hydrated Ba-mica and mixing mica (A mixture of biotite and hydrated Ba-mica) were used to be modified by STAC (octadecyl trimethylammonium chloride). Fourier transform infrared spectroscopy and powder X-ray diffraction spectroscopywere were used to characterize the obtained samples to reveal the changes of interlayer spacing and basal spacing. The results showed that STA+ could not enter into the interlayer spacing of biotite but enter into that of hydrated Ba-mica and mixing mica. Almost all basal spacing of Ba-mica and mixing mica were increased to 2.8nm.

In situ X-ray diffraction investigations during high-energy oxygen ion implantation in transition metals

Vacuum ◽  
2004 ◽  
Vol 76 (2-3) ◽  
pp. 281-285 ◽  
Author(s):  
Y. Bohne ◽  
N. Shevchenko ◽  
F. Prokert ◽  
J. von Borany ◽  
B. Rauschenbach ◽  
...  
Keyword(s):  
Transition Metals ◽  
Ion Implantation ◽  
High Energy ◽  
X Ray Diffraction ◽  
X Ray ◽  
Oxygen Ion ◽  
Oxygen Ion Implantation

Fragmentation of C60 Molecules in Partially Ionized Fullerene Beam Deposition

1994 ◽  
Vol 359 ◽  
Author(s):  
Zhong-Min Ren ◽  
Xia-Xing Xiong ◽  
Yuan-Cheng Du ◽  
Zhi-Feng Ying ◽  
Liang-Yao Chen ◽  
...  
Keyword(s):  
Raman Spectra ◽  
Amorphous Carbon ◽  
Experimental Results ◽  
Cluster Beam ◽  
X Ray Diffraction ◽  
X Ray ◽  
Partially Ionized ◽  
Almost All ◽  
Cluster Beam Deposition ◽  
Beam Deposition

ABSTRACTC60 films have been deposited using a partially ionized cluster beam deposition (PIBD) technique. The experimental results show that as Va. exceeds about 400 V almost all the C60 molecules fragmentate at collision with the substrate and the obtained films turn to be amorphous carbon layers at elevated Va, indicated by measurements of Raman spectra, X-ray diffraction, and ellipsometry.

Characterizations of Synthetic 8mol% YSZ with Comparison to 3mol %YSZ for HT-SOFC

2020 ◽  
Vol 38 (4A) ◽  
pp. 491-500
Author(s):  
Abeer F. Al-Attar ◽  
Saad B. H. Farid ◽  
Fadhil A. Hashim
Keyword(s):  
Ionic Conductivity ◽  
Electrochemical Impedance ◽  
Structural Information ◽  
Impedance Analysis ◽  
High Energy ◽  
Yttria Stabilized Zirconia ◽  
X Ray Diffraction ◽  
Stabilized Zirconia ◽  
Powder Morphology ◽  
X Ray

In this work, Yttria (Y2O3) was successfully doped into tetragonal 3mol% yttria stabilized Zirconia (3YSZ) by high energy-mechanical milling to synthesize 8mol% yttria stabilized Zirconia (8YSZ) used as an electrolyte for high temperature solid oxide fuel cells (HT-SOFC). This work aims to evaluate the densification and ionic conductivity of the sintered electrolytes at 1650°C. The bulk density was measured according to ASTM C373-17. The powder morphology and the microstructure of the sintered electrolytes were analyzed via Field Emission Scanning Electron Microscopy (FESEM). The chemical analysis was obtained with Energy-dispersive X-ray spectroscopy (EDS). Also, X-ray diffraction (XRD) was used to obtain structural information of the starting materials and the sintered electrolytes. The ionic conductivity was obtained through electrochemical impedance spectroscopy (EIS) in the air as a function of temperatures at a frequency range of 100(mHz)-100(kHz). It is found that the 3YSZ has a higher density than the 8YSZ. The impedance analysis showed that the ionic conductivity of the prepared 8YSZ at 800°C is0.906 (S.cm) and it was 0.214(S.cm) of the 3YSZ. Besides, 8YSZ has a lower activation energy 0.774(eV) than that of the 3YSZ 0.901(eV). Thus, the prepared 8YSZ can be nominated as an electrolyte for the HT-SOFC.

PENGGUNAAN TiO2 PARTIKEL NANO HASIL SINTESIS BERBASIS AIR MENGGUNAKAN METODA SOL-GEL PADA BAHAN KAPAS SEBAGAI APLIKASI UNTUK TEKSTIL ANTI UV

Arena Tekstil ◽  
2013 ◽  
Vol 28 (1) ◽  
Author(s):  
Maya Komalasari ◽  
Bambang Sunendar
Keyword(s):  
Fourier Transform ◽  
Electron Microscope ◽  
Scanning Electron Microscope ◽  
Sol Gel ◽  
Crosslinking Agent ◽  
X Ray Diffraction ◽  
Nano Tio2 ◽  
X Ray ◽  
Infra Red ◽  
Scanning Electron

Partikel nano TiO2 berbasis air dengan pH basa telah berhasil disintesis dengan menggunakan metode sol-gel dan diimobilisasi pada kain kapas dengan menggunakan kitosan sebagai zat pengikat silang. Sintesis dilakukan  dengan prekursor TiCl4 pada konsentrasi 0,3 M, 0,5 M dan 1 M, dan menggunakan templat kanji dengan proses kalsinasi pada suhu 500˚C selama 2 jam. Partikel nano TiO2 diaplikasikan ke kain kapas dengan metoda pad-dry-cure dan menggunakan kitosan sebagai crosslinking agent. Berdasarkan hasil Scanning Electron Microscope (SEM),diketahui bahwa morfologi partikel TiO2 berbentuk spherical dengan ukuran nano (kurang dari 100 nm). Karakterisasi X-Ray Diffraction (XRD) menunjukkan adanya tiga tipe struktur kristal utama, yaitu (100), (101) dan (102) dengan fasa kristal yang terbentuk adalah anatase dan rutile. Pada karakterisasi menggunakan SEM terhadap serbuk dari TiO2 yang telah diaplikasikan ke permukaan kain kapas, terlihat adanya imobilisasi partikel nano TiO2 melalui ikatan hidrogen silang dengan kitosan pada kain kapas. Hasil analisa tersebut kemudian dikonfirmasi dengan FTIR (Fourier Transform Infra Red) yang hasilnya memperlihatkan puncak serapan pada bilangan gelombang 3495 cm-1, 2546 cm-1, dan 511 cm-1,  yang masing-masing diasumsikan sebagai adanya vibrasi gugus fungsi O-H, N-H dan Ti-O-Ti. Hasil SEM menunjukkan pula bahwa kristal nano yang terbentuk diantaranya adalah fasa rutile , yang berdasarkan literatur terbukti dapatberfungsi sebagai anti UV.

PENINGKATAN LAJU DISOLUSI ACYCLOVIR DENGAN METODE SISTEM DISPERSI PADAT MENGGUNAKAN POLOXAMER 188

2016 ◽  
Vol 5 (1) ◽  
pp. 6
Author(s):  
Budi Setiawan ◽  
Erizal Zaini ◽  
Salman Umar
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Differential Thermal Analysis ◽  
Fourier Transform Infrared ◽  
X Ray Diffraction ◽  
Poloxamer 188 ◽  
X Ray ◽  
Scanning Electron

Sebuah penelitian tentang sistem dispersi padat dari asiklovir dengan poloxamer 188 telah dilakukan formulasi dengan pencampuran secara fisika dengan rasio 1 : 1, 1 : 3, 1 : 5 dan dispersi padat 1 : 1, 1 : 3, 1 : 5 dan penggilingan 1:1 sebagai pembanding. Dispersi padat dibuat menggunakan metode pencairan (fusi), yang digabung dengan poloxamer 188 pada hotplate kemudian asiklovir dimasukkan ke dalam hasil poloxamer 188 lalu di kocok hingga membentuk masa homogen. Semua formula yang terbentuk termasuk asiklovir poloxamer 188 murni dianalisis karakterisasinya dengan Differential Thermal Analysis (DTA), X-ray Diffraction, Scanning Electron Microscopy (SEM), dan Fourier Transform Infrared (FTIR), kemudian pengambilan dilakukan  (penentuan kadar) mengunakan spektrofotometer UV pada panjang gelombang 257,08 nm dan uji laju disolusi dengan aquadest bebas CO2 menggunakan metode dayung. Hasil pengambilan  (penentuan kadar) menunjukkan bahwa semua formula memenuhi persyaratan farmakope Amerika edisi 30 dan farmakope Indonesia edisi 4 yaitu 95-110%. Sedangkan hasil uji laju disolusi untuk campuran fisik 1: 1, dan dispersi padat 1: 1, dan penggilingan 1: 1 menunjukkan peningkatan yang nyata dibandingkan asiklovir murni. Hal ini juga dapat dilihat dari hasil perhitungan statistik  menggunakan analisis varian satu arah  SPSS 17.

Sign in / Sign up

Export Citation Format

Share Document