The Resource Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates

Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates

Label
Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates
Title
Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates
Creator
Language
eng
Summary
"A study of the chemical vapor deposition (CVD) of boron from boron triiodide (BI3) on molybdenum has been done with field emission microscopy (FEM) and low energy electron diffraction (LEED). A correlation of the efficiency by which BI3 is effectively dissociated to form adsorbed boron, and the temperature of the substrate has been shown through work function measurements on the boron covered molybdenum field emitter surfaces. The boron-induced work function change of molybdenum has been shown to be in agreement with a theoretical model which predicts positive, as well as negative work functions for adsorbate-substrate systems. It has previously been found that the theoretical model can be used to accurately determine the occurence of the adsorbate monolayer. By comparison of the experimental work function data with the theoretical model inferrence of the thermal accommodation coefficient, of the adsorbate source species (BI3), on the substrate is made. The free energy of desorption of boron from molybdenum field emitter surfaces has been measured by isothermal desorption experiments and been found to be 46.9 kcal/mole at boron coverages of about 0.4 monolayer. The time-dependent adsorption, leading to nucleation of boron on molybdenum field emitter surfaces has been observed to occur at about 0.5 monolayer coverages of boron. LEED studies of a Mo(100) single crystal at substrate temperatures of 700°C to 900°C in BI3 partial pressures of 3 x 10−8 torr result in no structure change relative to the clean surface, even at prolonged exposures to BI3. However, under the same experimental conditions, the Mo(110) surface exhibits the formation of one-dimensional disordered structures with the original ordering maintained in an orthogonal direction to the disorder"--Abstract, leaves ii-iii
Related
Member of
http://library.link/vocab/creatorDate
1941-
http://library.link/vocab/creatorName
Moore, Richard Eugene
Degree
Ph. D.
Dissertation year
1973.
Granting institution
University of Missouri--Rolla
Index
no index present
Literary form
non fiction
Label
Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates
Instantiates
Publication
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
6024893
Extent
129 pages.
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
System control number
(WaOLN)47064
Label
Initial surface reactions and nucleation kinetics of boron on atomically clean molybdenum substrates
Publication
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
6024893
Extent
129 pages.
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
System control number
(WaOLN)47064

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      400 West 14th Street, Rolla, MO, 65409, US
      37.955220 -91.772210
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