Results 1 to 10 of about 18,978 (209)

Atomic Force Microscope Based Kelvin Probe Measurements:  Application to an Electrochemical Reaction [PDF]

The Journal of Physical Chemistry B, 1997
An atomic force microscope (AFM) was utilized as a Kelvin probe to determine work functions of several metals and semiconductors quantitatively. Most of the experimental data show excellent agreement with published values measured by photoemission. Variations in work functions as low as 5 mV could be detected with a typical lateral resolution of 20 nm.
Böhmisch, Mathias, Burmeister, Frank, Rettenberger, Armin, Zimmermann, Jörg, Boneberg, Johannes, Leiderer, Paul   +5 more
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Potential sensitivities in frequency modulation and heterodyne amplitude modulation Kelvin probe force microscopes [PDF]

Nanoscale Research Letters, 2013
In this paper, the potential sensitivity in Kelvin probe force microscopy (KPFM) was investigated in frequency modulation (FM) and heterodyne amplitude modulation (AM) modes. We showed theoretically that the minimum detectable contact potential difference (CPD) in FM-KPFM is higher than in heterodyne AM-KPFM. We experimentally confirmed that the signal-
Ma, Zong-Min, Mu, Ji-Liang, Tang, Jun, Xue, Hui, Zhang, Huan, Xue, Chen-Yang, Liu, Jun, Li, Yan-Jun   +7 more
openaire   +4 more sources

Calibration of the scanning Kelvin probe force microscope under controlled environmental conditions [PDF]

Electrochimica Acta, 2012
Local Volta potential differences (Δψ) between a platinum coated AFM tip and various pure metal specimens with a thin humidity induced surface electrolyte layer have been determined via scanning Kelvin probe force microscopy (SKPFM). SKPFM derived Δψ display a linear correlation with the same quantities obtained under nominally identical environmental ...
Cook, A. B., Barrett, Z., Lyon, S. B., McMurray, H. N., Walton, J., Williams, G.   +5 more
openaire   +7 more sources

Electrical Response of Different Crystalline Microregions in Poly(vinylidene fluoride) [PDF]

Nanomaterials
The crystal structure has a great influence on the dielectric and piezoelectric performance of poly(vinylidene fluoride) (PVDF). In this work, we prepared PVDF films with two typical crystalline phases (α and β).
Mengyue Su, Jun Zhou, Yuqing Chen, Yilong Wang, Gan Jin, Haiyang Wang, Jiacheng Zhou, Xiaoyue Pang, Zepeng Lv, Kai Wu   +9 more
doaj   +2 more sources

Two-dimensional SnS2 single crystal for sensitive NO2 detection at room temperature [PDF]

Microsystems & Nanoengineering
Two-dimensional (2D) materials are intensively studied as promising materials for gas sensors owing to their large surface area and low working temperature.
Chenfei Guo, Lin Liu, Zhengyang Cai, Yingyi Wang, Kejie Guan, Fuqin Sun, Weifan Zhou, Xiaoshuang Gou, Xiaoqian He, Xiaowei Wang, Ting Zhang   +10 more
doaj   +2 more sources

Single-Electron Charging in Phosphorus Donors in Silicon Observed by Low-Temperature Kelvin Probe Force Microscope

Japanese Journal of Applied Physics, 2011
Kelvin probe force microscopy (KFM) working at low temperatures (13 K) is used to study local electronic potential fluctuations induced by individual phosphorus donors. Electronic potential maps were measured at the surface of thin phosphorus-doped channel of silicon-on-insulator field-effect transistors for different values of backgate voltage. We
Miftahul Anwar, Yuya Kawai, Daniel Moraru, Roland Nowak, Ryszard Jablonski, Takeshi Mizuno, Michiharu Tabe   +6 more
  +4 more sources

Characterizing and controlling infrared phonon anomaly of bilayer graphene in optical-electrical force nanoscopy

Light: Science & Applications, 2023
We, for the first time, report the nanoscopic imaging study of anomalous infrared (IR) phonon enhancement of bilayer graphene, originated from the charge imbalance between the top and bottom layers, resulting in the enhancement of E1u mode of bilayer ...
Junghoon Jahng, Sunho Lee, Seong-Gu Hong, Chang Jun Lee, Sergey G. Menabde, Min Seok Jang, Dong-Hyun Kim, Jangyup Son, Eun Seong Lee   +8 more
doaj   +1 more source

Initial micro-galvanic corrosion behavior between Mg2Ca and α-Mg via quasi-in situ SEM approach and first-principles calculation

Journal of Magnesium and Alloys, 2023
The initial micro-galvanic corrosion behavior of Mg‒30wt%Ca alloy only containing Mg2Ca and α-Mg was studied by immersion testing in a 0.9% NaCl solution at 37 °C.
Chen Xu, Jianfeng Wang, Chen Chen, Chao Wang, Yufeng Sun, Shijie Zhu, Shaokang Guan   +6 more
doaj   +1 more source

Revealing corrosion behavior of B4C/pure Al composite at different interfaces between B4C particles and Al matrix in NaCl electrolyte

Journal of Materials Research and Technology, 2023
In the present work, the corrosion behavior of the B4C/pure Al composite in a Cl− containing environment is investigated. Thereby, the B4C/pure Al composites have been subjected to the different heat treatments to highlight the impact of the corrosion ...
Huimin Han, Longtao Jiang, Zhenlong Chao, Wei Xue, Ming Zhu, Bingzhuo Han, Runwei Zhang, Shanqi Du, Tian Luo, Yong Mei   +9 more
doaj   +1 more source

Corrosion Resistance of 904L Super Austenitic Stainless Steel Welded Joints [PDF]

Cailiao Baohu, 2023
In order to study the corrosion resistance of 904L super austenitic stainless steel welded joints in a simulated nuclear power plant tertiary loop water environment, the Kelvin probe force microscope (KPFM), electron backscatter diffraction (EBSD ...
LIAO Xuebo, ZHANG Dubao, PU Jingjing, GAO Chao
doaj   +1 more source