Contact potential measurement of cleaved mirror surface of 1.3 [micro sign]m buried heterostructure laser diode by Kelvin probe force microscopy

2002 ◽  
Vol 38 (25) ◽  
pp. 1662 ◽  
Author(s):  
T. Mizutani ◽  
K. Kato ◽  
T. Yamagata ◽  
S. Kishimoto ◽  
N. Yamamoto ◽  
...  
Keyword(s):  
Laser Diode ◽  
Kelvin Probe Force Microscopy ◽  
Mirror Surface ◽  
Kelvin Probe ◽  
Contact Potential ◽  
Potential Measurement ◽  
Force Microscopy ◽  
Heterostructure Laser ◽  
Buried Heterostructure

Contact Potential Measurement of Carbon Nanotube by Kelvin Probe Force Microscopy

2003 ◽  
Vol 42 (Part 1, No. 4B) ◽  
pp. 2449-2452 ◽  
Author(s):  
Chikashi Maeda ◽  
Shigeru Kishimoto ◽  
Takasi Mizutani ◽  
Toshiki Sugai ◽  
Hisanori Shinohara
Keyword(s):  
Carbon Nanotube ◽  
Kelvin Probe Force Microscopy ◽  
Kelvin Probe ◽  
Contact Potential ◽  
Potential Measurement ◽  
Force Microscopy

scholarly journals Imaging Hydrogen in Stainless Steel Alloys by Kelvin Probe Force Microscopy

2018 ◽  
Author(s):  
J. D. McNamara ◽  
A. J. Duncan ◽  
M. J. Morgan ◽  
P. S. Korinko
Keyword(s):  
Stainless Steel ◽  
Grain Boundaries ◽  
Contact Potential Difference ◽  
Kelvin Probe Force Microscopy ◽  
Grain Structure ◽  
Kelvin Probe ◽  
Contact Potential ◽  
Steel Alloys ◽  
Force Microscopy ◽  
Net Shaping

Kelvin probe force microscopy (KPFM) was used to image austenitic stainless steel (SS) samples (Type 304L) fabricated by the laser engineered net shaping (LENS®) process. The samples were hydrogen charged (H-charged) and subsequently cut and polished. The surface contact potential difference (CPD) of the samples was measured using the KPFM technique, a form of atomic force microscopy. A set of uncharged samples was also studied for reference and changes in the CPD were on the noise level. For H-charged samples fabricated by the LENS® process, the resulting surface potential images show a change in CPD of about 10 – 20mV around cell-like boundaries (5–10 μm in size) and grain boundaries (50–100 μm in size). The significant change in the CPD is affected by variation of the local work function, which indicates the presence of hydrogen. The elemental composition of the LENS® samples was studied using energy dispersive spectroscopy (EDS) which showed an increase in the atomic percentage of Cr and a decrease in Ni around the cell-like boundaries. The existence of intercellular ferrite on the sub-grain boundaries may explain the propensity of hydrogen to segregate around these regions. The finer grain structure of LENS® samples compared to that of forged or welded samples suggests that the hydrogen can be dispersed differently throughout this material than in traditionally forged austenitic SS. This study is conducted to elucidate the behavior of hydrogen with respect to the microstructure of additively manufactured stainless steel alloys.

Surface Potential Measurement of Oligothiophene Ultrathin Films by Kelvin Probe Force Microscopy

2001 ◽  
Vol 40 (Part 1, No. 6B) ◽  
pp. 4381-4383 ◽  
Author(s):  
Keiichi Umeda ◽  
Kei Kobayashi ◽  
Kenji Ishida ◽  
Shu Hotta ◽  
Hirofumi Yamada ◽  
...  
Keyword(s):  
Surface Potential ◽  
Ultrathin Films ◽  
Kelvin Probe Force Microscopy ◽  
Kelvin Probe ◽  
Potential Measurement ◽  
Force Microscopy
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