Nanometer-Scale Pulsed Laser Modification of the Basal Plane of Graphite Observed with Stm

1990 ◽  
Vol 191 ◽  
Author(s):  
M. A. Schildbach ◽  
R. J. Tench ◽  
M. Balooch ◽  
W. J. Siekhaus
Keyword(s):  
Surface Modification ◽  
Scanning Tunneling Microscopy ◽  
Basal Plane ◽  
Pyrolytic Graphite ◽  
Pulsed Laser ◽  
Scanning Tunneling ◽  
Nanometer Scale ◽  
Scale Morphology ◽  
Tunneling Microscopy ◽  
Laser Modification

ABSTRACTScanning tunneling microscopy has been used to document changes in the nanometer-scale morphology of the basal plane of highly oriented pyrolytic graphite after exposure to 7 ns, 1064 nm laser.pulses in air. Surface modification was visible at fluences far below those that produce melting. Damage appears first on step edges and consists of exfoliation of graphite layers and recession of steps through removal of mono- or multilayer patches.

Nanometer Scale Structures Resulting from Graphite Oxidation

1994 ◽  
Vol 332 ◽  
Author(s):  
Marilyn J. Nowakowski ◽  
John M. Vohs ◽  
Dawn A. Bonnell
Keyword(s):  
Electronic Structure ◽  
Scanning Tunneling Microscopy ◽  
Oxygen Plasma ◽  
Pyrolytic Graphite ◽  
Scanning Tunneling ◽  
Nanometer Scale ◽  
Tunneling Microscopy ◽  
Graphite Oxidation ◽  
Local Electronic Structure ◽  
Scale Structures

ABSTRACTScanning tunneling microscopy (STM) and spectroscopy (STS) were used to characterize highly oriented pyrolytic graphite (HOPG) which was oxidized by two different methods, furnace heating in atmosphere and immersion in oxygen plasma. The character of the surfaces was found to be dissimilar on a micron scale but comparable on a nanometer scale, at which both appear to be comprised of sharp step edges. Variations in local electronic structure near a step edge were compared.

Publisher’s Note: “Probing subpicosecond dynamics using pulsed laser combined scanning tunneling microscopy” [Appl. Phys. Lett. 85, 3268 (2004)]

2004 ◽  
Vol 85 (23) ◽  
pp. 5790-5790
Author(s):  
Osamu Takeuchi ◽  
Masahiro Aoyama ◽  
Ryuji Oshima ◽  
Yoshitaka Okada ◽  
Haruhiro Oigawa ◽  
...  
Keyword(s):  
Scanning Tunneling Microscopy ◽  
Pulsed Laser ◽  
Scanning Tunneling ◽  
Tunneling Microscopy

Scanning Tunneling Microscopy and Atomic Force Microscopy Investigation of Organic Tetracyanoquinodimethane Thin Films

1997 ◽  
Vol 12 (8) ◽  
pp. 1942-1945 ◽  
Author(s):  
H. J. Gao ◽  
H. X. Zhang ◽  
Z. Q. Xue ◽  
S. J. Pang
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Scanning Tunneling Microscopy ◽  
Pyrolytic Graphite ◽  
Film Surface ◽  
Scanning Tunneling ◽  
Tunneling Microscopy ◽  
Force Microscopy ◽  
Atomic Force ◽  
Microscopy Investigation

Scanning tunneling microscopy (STM) and atomic force microscopy (AFM) investigation of tetracyanoquinodimethane (TCNQ) and the related C60-TCNQ thin films is presented. Periodic molecular chains of the TCNQ on highly oriented pyrolytic graphite (HOPG) substrates were imaged, which demonstrated that the crystalline (001) plane was parallel to the substrate. For the C60-TCNQ thin films, we found that there were grains on the film surface. STM images within the grain revealed that the well-ordered rows and terraces, and the parallel rows in different grains were generally not in the same orientation. Moreover, the grain boundary was also observed. In addition, AFM was employed to modify the organic TCNQ film surface for the application of this type of materials to information recording and storage at the nanometer scale. The nanometer holes were successfully created on the TCNQ thin film by the AFM.

scholarly journals Effect of Size on Hydrogen Adsorption on the Surface of Deposited Gold Nanoparticles

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 344 ◽  
Author(s):  
Andrey Gatin ◽  
Maxim Grishin ◽  
Nadezhda Dokhlikova ◽  
Sergey Ozerin ◽  
Sergey Sarvadii ◽  
...  
Keyword(s):  
Experimental Study ◽  
Gold Nanoparticles ◽  
Scanning Tunneling Microscopy ◽  
Molecular Hydrogen ◽  
Hydrogen Adsorption ◽  
Pyrolytic Graphite ◽  
Scanning Tunneling ◽  
Hydrogen Chemisorption ◽  
Tunneling Microscopy ◽  
Average Size

An experimental study of molecular hydrogen adsorption on single gold nanoparticles of various sizes deposited on the surface of highly oriented pyrolytic graphite (HOPG) was carried out by means of scanning tunneling microscopy and spectroscopy. The effect of size on the HOPG/Au system was established. Hydrogen was dissociatively chemisorbed on the surface of gold nanoparticles with an average size of 5–6 nanometers. An increase in the size of nanoparticles to 10 nm or more led to hydrogen chemisorption being inhibited and unable to be detected.

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