Investigation of hydrogenated amorphous carbon coatings for magnetic data storage media by atomic force microscopy

1989 ◽  
Vol 55 (16) ◽  
pp. 1624-1626 ◽  
Author(s):  
E. Meyer ◽  
H. Heinzelmann ◽  
P. Grütter ◽  
Th. Jung ◽  
L. Scandella ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Data Storage ◽  
Amorphous Carbon ◽  
Magnetic Data ◽  
Carbon Coatings ◽  
Force Microscopy ◽  
Storage Media ◽  
Atomic Force ◽  
Amorphous Carbon Coatings ◽  
Hydrogenated Amorphous

Microscopic Electrical Conductivity of Nanodiamonds after Thermal and Plasma Treatments

MRS Advances ◽  
2016 ◽  
Vol 1 (16) ◽  
pp. 1105-1111 ◽  
Author(s):  
Jan Čermák ◽  
Halyna Kozak ◽  
Štěpán Stehlík ◽  
Vladimír Švrček ◽  
Vincent Pichot ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Atomic Force Microscopy ◽  
Electric Current ◽  
Amorphous Carbon ◽  
Rf Plasma ◽  
Electrically Conductive ◽  
Force Microscopy ◽  
Atomic Force ◽  
Plasma Treatments ◽  
Hydrogenated Amorphous

ABSTRACTAtomic force microscopy (AFM) is used to measure local electrical conductivity of HPHT nanodiamonds (NDs) dispersed on Au substrate in the as-received state and after thermal or plasma treatments. Oxygen-treated NDs are highly electrically resistive, whereas on hydrogen-treated NDs electric current around -200 pA at -2 V is detected. The as-received NDs as well as NDs after an underwater radio-frequency (RF) plasma or laser irradiation (LI) treatments contain both electrically conductive (two types: highly and weakly conductive) and highly resistive particles. The higher conductivity is attributed to H-terminated (RF) or graphitized (LI) NDs. The lower conductivity is attributed to NDs with hydrogenated amorphous carbon shell.

Oxidation Kinetics of Hydrogenated Amorphous Carbon (a-CHx) Overcoats for Magnetic Data Storage Media

Langmuir ◽  
2007 ◽  
Vol 23 (10) ◽  
pp. 5485-5490 ◽  
Author(s):  
Yang Yun ◽  
Xiaoding Ma ◽  
Jing Gui ◽  
Esteban Broitman ◽  
Andrew J. Gellman
Keyword(s):  
Data Storage ◽  
Amorphous Carbon ◽  
Oxidation Kinetics ◽  
Magnetic Data Storage ◽  
Magnetic Data ◽  
Hydrogenated Amorphous Carbon ◽  
Storage Media ◽  
Hydrogenated Amorphous ◽  
Kinetics Of

Atomic Force Microscopy Investigation of Protein Adsorption on Hydrogenated Amorphous Carbon

2013 ◽  
Vol 1527 ◽  
Author(s):  
Muhammad Zeeshan Mughal ◽  
Patrick Lemoine ◽  
Gennady Lubarsky
Keyword(s):  
Atomic Force Microscopy ◽  
Protein Adsorption ◽  
Amorphous Carbon ◽  
Phosphate Buffer ◽  
Adsorbed Layer ◽  
Force Curve ◽  
Hydrogenated Amorphous Carbon ◽  
Force Microscopy ◽  
Atomic Force ◽  
Hydrogenated Amorphous

ABSTRACTProtein adsorption is the first phenomenon which occurs at nanoscale level when a given surface came into contact with a living fluid cell such as blood. Investigation of this adsorption at nanoscale provides useful information about kinetics and mechanism of conformation of proteins on a given surface. The present study investigates the adsorption of proteins using tapping/intermittent mode atomic force microscopy (T-AFM). The approach taken here is that hydrogenated amorphous carbon coating (a-C:H) is used as a model surface because it is amorphous, smooth, inert and hydrophobic. Two proteins namely albumin and fibrinogen in phosphate buffer (PBS) and de-ionized water are drop casted to study the adsorption kinetics. First and second resonance AFM data was used to investigate the adsorbed layer of proteins. AFM force curve and scratch experiment were used to verify the adhesion and thickness of the adsorbed layer. Combination of height, phase images along with the AFM force curve and scratch experiment shows inhomogeneous distribution of albumin protein in phosphate buffer compared to other protein solutions.

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