13CNMR spectroscopy of amorphous hydrogenated carbon and amorphous hydrogenated boron carbide

1999 ◽  
Vol 59 (15) ◽  
pp. 9745-9747 ◽  
Author(s):  
Janet Braddock-Wilking ◽  
Shu-Han Lin ◽  
Bernard J. Feldman
Keyword(s):  
Boron Carbide ◽  
Amorphous Hydrogenated Boron Carbide ◽  
Amorphous Hydrogenated Carbon

13C NMR Spectroscopy of Amorphous Hydrogenated Carbon and Amorphous Hydrogenated Boron Carbide

1998 ◽  
Vol 555 ◽  
Author(s):  
Janet Braddock-Wilking ◽  
Shiu-Han Lin ◽  
Bernard J. Feldman
Keyword(s):  
Boron Carbide ◽  
Theoretical Calculations ◽  
Nanocrystalline Structure ◽  
13C Nmr Spectroscopy ◽  
Aromatic Rings ◽  
Carbide Matrix ◽  
High Boron ◽  
Amorphous Hydrogenated Boron Carbide ◽  
Amorphous Hydrogenated Carbon ◽  
Carbon Peak

AbstractWe report the 13C NMR spectra of amorphous hydrogenated carbon and boron carbide. The amorphous hydrogenated carbon spectra consist primarily of a sp2 carbon peak at 40 ppm and a sp3 carbon peak at 140 ppm and are in reasonable agreement with recent theoretical calculations of Mauri, Pfrommer, and Louie, but there are some noteable discrepancies. The amorphous hydrogenated boron carbide spectra are very different from that of amorphous hydrogenated carbon, showing two sharp lines at 135 and 170 ppm at low boron concentrations and an intense, broader line at 15 ppm at high boron concentrations. We suggest the two sharp lines at 135 and 170 ppm could be due to carbon atoms in boron-containing aromatic rings, and the broader line at 15 ppm as due to carbon atoms in boron carbide icosahedra. These lines provide evidence of nanocrystalline structure imbedded in an amorphous hydrogenated boron carbide matrix.

scholarly journals Nanoscale Structure-Property Relationship in Amorphous Hydrogenated Boron Carbide for Low-k Dielectric Applications

2017 ◽  
Vol 23 (S1) ◽  
pp. 1486-1487
Author(s):  
Soohyun Im ◽  
Michelle M. Paquette ◽  
Mohammed Belhadj-Larbi ◽  
Paul Rulis ◽  
Ridwan Sakidja ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Structure Property ◽  
Property Relationship ◽  
Structure Property Relationship ◽  
Nanoscale Structure ◽  
Amorphous Hydrogenated Boron Carbide ◽  
Low K

scholarly journals Carbon-Enriched Amorphous Hydrogenated Boron Carbide Films for Very-Low-k Interlayer Dielectrics

2017 ◽  
Vol 3 (12) ◽  
pp. 1700116 ◽  
Author(s):  
Bradley J. Nordell ◽  
Thuong D. Nguyen ◽  
Anthony N. Caruso ◽  
Sudhaunshu S. Purohit ◽  
Nathan A. Oyler ◽  
...  
Keyword(s):  
Boron Carbide ◽  
Interlayer Dielectrics ◽  
Amorphous Hydrogenated Boron Carbide ◽  
Low K

scholarly journals Model creation and electronic structure calculation of amorphous hydrogenated boron carbide: a classical/ab initio hybrid approach

RSC Advances ◽  
2017 ◽  
Vol 7 (74) ◽  
pp. 46788-46795 ◽  
Author(s):  
Mohammed Belhadj-Larbi ◽  
Rachel Cramm Horn ◽  
Paul Rulis
Keyword(s):  
Electronic Structure ◽  
Boron Carbide ◽  
Ab Initio ◽  
Hybrid Approach ◽  
Structure Calculation ◽  
Electronic Structure Calculation ◽  
Periodic Model ◽  
Amorphous Hydrogenated Boron Carbide

Periodic model of amorphous hydrogenated boron carbide.

scholarly journals Role of generated free radicals in synthesis of amorphous hydrogenated boron carbide from orthocarborane using argon bombardment: a ReaxFF molecular dynamics study

2020 ◽  
Vol 6 (12) ◽  
pp. 126461
Author(s):  
Nirmal Baishnab ◽  
Rajan Khadka ◽  
Michelle M Paquette ◽  
Paul Rulis ◽  
Nathan A Oyler ◽  
...  
Keyword(s):  
Molecular Dynamics ◽  
Free Radicals ◽  
Boron Carbide ◽  
Amorphous Hydrogenated Boron Carbide

Doping vs alloying in amorphous hydrogenated boron carbide

1995 ◽  
Vol 93 (12) ◽  
pp. 969-971 ◽  
Author(s):  
Brian Sylvester ◽  
Shu-Han Lin ◽  
Bernard J. Feldman
Keyword(s):  
Boron Carbide ◽  
Amorphous Hydrogenated Boron Carbide

Microhardness, Structure, and Composition Study of Amorphous Hydrogenated Boron Carbide

1995 ◽  
Vol 383 ◽  
Author(s):  
Shu-Han Lin ◽  
Dong Li ◽  
Bernard J. Feldman
Keyword(s):  
Thin Films ◽  
Chemical Composition ◽  
Optical Absorption ◽  
Boron Carbide ◽  
Infrared Absorption ◽  
Rf Plasma ◽  
Plasma Decomposition ◽  
Optical Bandgaps ◽  
Composition Study ◽  
Amorphous Hydrogenated Boron Carbide

ABSTRACTWe have grown amorphous hydrogenated boron carbide thin films by rf plasma decomposition of diborane and methane. The chemical composition, infrared absorption, optical absorption, and microhardness of these thin films were measured. As a function of increasing diborane concentration in the feedstock, we observe increasing boron and hydrogen concentrations, increasing infrared absorption at 1330 cm−1 due to boron icosahedra, increasing optical bandgaps, and an unchanging microhardness in the grown films. The microhardness should have decreased due to the increasing hydrogen concentration; this expected decrease may have been balanced by an increased microhardness due to the boron icosahedra.

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