The versatility in LC selectivity attainable with the silica base and associated bonded phases

Bioanalysis ◽  
2015 ◽  
Vol 7 (6) ◽  
pp. 637-642 ◽  
Author(s):  
Robert MacNeill ◽  
Jim Taylor
Keyword(s):  
Bonded Phases

Structural relationships in the synthesis of cubic boron nitride thin films by ion-assisted deposition

1994 ◽  
Vol 52 ◽  
pp. 638-639
Author(s):  
D. L. Medlin ◽  
T. A. Friedmann ◽  
P. B. Mirkarimi ◽  
M. J. Mills ◽  
K. F. McCarty
Keyword(s):  
Boron Nitride ◽  
Ion Irradiation ◽  
Cubic Boron Nitride ◽  
Film Stress ◽  
Bonded Phases ◽  
Structural Relationships ◽  
Precursor Material ◽  
Pressure Synthesis ◽  
Microstructure Of The Material

The allotropes of boron nitride include two sp2-bonded phases with hexagonal and rhombohedral structures (hBN and rBN) and two sp3-bonded phases with cubic (zincblende) and hexagonal (wurtzitic) structures (cBN and wBN) (Fig. 1). Although cBN is synthesized in bulk form by conversion of hBN at high temperatures and pressures, low-pressure synthesis of cBN as a thin film is more difficult and succeeds only when the growing film is simultaneously irradiated with a high flux of ions. Only sp2-bonded material, which generally has a disordered, turbostratic microstructure (tBN), will form in the absence of ion-irradiation. The mechanistic role of the irradiation is not well understood, but recent work suggests that ion-induced compressive film stress may induce the transformation to cBN.Typically, BN films are deposited at temperatures less than 1000°C, a regime for which the structure of the sp2-bonded precursor material dictates the phase and microstructure of the material that forms from conventional (bulk) high pressure treatment.

Properties of chemically bonded phases

1981 ◽  
Vol 14 (4) ◽  
pp. 227-233 ◽  
Author(s):  
H. Engelhardt ◽  
G. Ahr
Keyword(s):  
Chemically Bonded Phases ◽  
Bonded Phases

Bonded Phases in HPLC

2005 ◽  
pp. 216-218
Author(s):  
Joseph J. Pesek ◽  
Maria T. Matyska
Keyword(s):  
Bonded Phases
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