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Title: graphene/SiO2/Si wafer PEEM summary sample#01.


Abstract not provided.

  1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
Report Number(s):
DOE Contract Number:
Resource Type:
Technical Report
Country of Publication:
United States

Citation Formats

Ohta, Taisuke. graphene/SiO2/Si wafer PEEM summary sample#01.. United States: N. p., 2017. Web. doi:10.2172/1346337.
Ohta, Taisuke. graphene/SiO2/Si wafer PEEM summary sample#01.. United States. doi:10.2172/1346337.
Ohta, Taisuke. Wed . "graphene/SiO2/Si wafer PEEM summary sample#01.". United States. doi:10.2172/1346337.
title = {graphene/SiO2/Si wafer PEEM summary sample#01.},
author = {Ohta, Taisuke},
abstractNote = {Abstract not provided.},
doi = {10.2172/1346337},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Mar 01 00:00:00 EST 2017},
month = {Wed Mar 01 00:00:00 EST 2017}

Technical Report:

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  • An experiment was conducted to determine the effect of six different microorganisms on Illinois No. 6 solubilized coal. The microorganisms had been previously shown to alter or degrade dibenzothiophene (DBT). Three methods were investigated to determine the effect of the microorganisms on the solubilized coal. The methods were Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and pyrolysis/mass spectrometry (PY-MS). Pyrolysis/mass spectrometry (PY-MS), determines the form of organic sulfur present in the coal by pyrolyzing a sample at high temperature in an inert atmosphere and analyzing the fragments by mass spectrometry. This method can identify the molecular ion frommore » each organosulfur compound produced in the pyrolysis, which requires a library of known compounds as references. Although there is at the present time a limited number of reference compounds, the method does reveal differences or patterns amongst samples. In the present experiment, analysis of the solubilized coal in the presence of organisms C18 and E1 showed an enhancement in the number of terpenoid-like compounds. Additional analysis of the pyrolysis-mass spectral data showed the presence of several organosulfur compounds in bacterially treated coal that were not identified in the untreated coal. These compounds were tentatively identified as dibenzothiophene, benzothiophene and diphenyl sulfoxide. Organosulfur and terpenoid structures may be more resistant to microbial degradation than other coal constituents such as aliphatic or aromatic hydrocarbons. Thus, the enrichment of organosulfur and terpenoid structures in microbially treated solubilized coal may be accounted for either by the degradation of readily metabolized coal components leaving minor components more easily identified such as aliphatic and aromatics or microbes may catalyze the formation of these compounds. 12 figs., 2 tabs.« less
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