Results 71 to 80 of about 5,628 (300)

A Multi-scale Approach for Simulations of Kelvin Probe Force Microscopy with Atomic Resolution

, 2012
The distance dependence and atomic-scale contrast observed in nominal contact potential difference (CPD) signals recorded by KPFM on surfaces of insulating and semiconducting samples, have stimulated theoretical attempts to explain such effects.
Alexis Baratoff, Ali Sadeghi, D. P. Woodruff, Ernst Meyer, J. D. Jackson, L. D. Landau, S. Alireza Ghasemi, S. Sadewasser, Shigeki Kawai, Stefan Goedecker, Thilo Glatzel, W. R. Smythe   +11 more
core   +1 more source

Atomic‐Level Ionic Displacement Polarization Enhanced Piezocatalytic Hydrogen Evolution in Covalent Organic Frameworks

Advanced Functional Materials, EarlyView.
Two isomorphic COFs were synthesized and compared, including an amphoteric COF (SQ‐TAPT) and a neutral COF (PDA‐TAPT). The ionic bonds in SQ‐TAPT introduce more Born effective charges, thereby enhancing its ionic displacement polarization. Experimental and theoretical calculations demonstrated that SQ‐TAPT exhibited higher polarity and stronger ...
Ge Yan, Xiaodong Sun, Kailai Zhang, Shuai Zhang, Haijun Hu, Hui Li, Zhenglong Li, Hongwei Huang, Liqun Ye, Jiyang Li, Yunling Liu, Hongge Pan, Tianyi Ma   +12 more
wiley   +1 more source

Exploring the Electrical Properties of Twisted Bilayer Graphene [PDF]

, 2019
Two-dimensional materials exhibit properties unlike anything else seen in conventional substances. Electrons in these materials are confined to move only in the plane.
Greenlee, Byron D., Heath, Jennifer, Murphy, Joseph, Shannon, William, Toledo-Urena, Joel   +4 more
core   +1 more source

Voltage‐Gated Dedoping of n‐Doped Poly(benzodifurandione) as an Interfacial Protective Mechanism in Electrochromic Devices

Advanced Functional Materials, EarlyView.
Electrochromic polymer stability under overpotential is improved by inserting an ultrathin, transparent n‐doped poly(benzodifurandione) interlayer between indium tin oxide and a poly(3,4‐propylenedioxythiophene)‐based electrochromic polymer. The interlayer supports rapid switching at operating bias, then becomes resistive near +0.8 V to suppress excess
Priyanka Rout, Palak Mehra, Won‐June Lee, Liyan You, Jianguo Mei   +4 more
wiley   +1 more source

Imaging Ferroelectric Domains via Charge Gradient Microscopy Enhanced by Principal Component Analysis

, 2017
Local domain structures of ferroelectrics have been studied extensively using various modes of scanning probes at the nanoscale, including piezoresponse force microscopy (PFM) and Kelvin probe force microscopy (KPFM), though none of these techniques ...
Esfahani, Ehsan Nasr, Li, Jiangyu, Liu, Xiaoyan   +2 more
core   +2 more sources

Ferroelectric Quantum Dots for Retinomorphic In‐Sensor Computing

Advanced Materials, EarlyView.
This work has provided a protocol for fabricating retinomorphic phototransistors by integrating ferroelectric ligands with quantum dots. The resulting device combines ferroelectricity, optical responsiveness, and low‐power operation to enable adaptive signal amplification and high recognition accuracy under low‐light conditions, while supporting ...
Tingyu Long, Huanyu Zhou, Jaewan Ko, Hongwei Tan, Jaemin Lim, Yanfei Zhao, Daehan Kang, Eojin Yoon, Gyeong‐Tak Go, Somin Kim, Seung‐Woo Lee, Chan‐Yul Park, Hyojun Choi, Hyeran Kim, Hyung Joong Yun, Sung Hyuk Park, Kwan Sik Park, Jeong Woo Park, Mungeun Kim, Yong Soo Cho, Ho Won Jang, Wenqiang Yang, Min Hyuk Park, Wan Ki Bae, Sebastiaan van Dijken, Joona Bang, Tae‐Woo Lee   +26 more
wiley   +1 more source

Near-equilibrium measurement of quantum size effects using Kelvin probe force microscopy

, 2017
In nano-structures such as thin films electron confinement results in the quantization of energy levels in the direction perpendicular to the film. The discretization of the energy levels leads to the oscillatory dependence of many properties on the film
Hoffmann-Vogel, Regina, León, Carmen Pérez, Marz, Michael, Popp, Matthias, Späth, Thomas   +4 more
core   +1 more source

Kelvin Probe Force Microscopy in Bionanotechnology: Current Advances and Future Perspectives

Advanced Materials, EarlyView.
Kelvin probe force microscopy (KPFM) enables the nanoscale mapping of electrostatic surface potentials. While widely applied in materials science, its use in biological systems remains emerging. This review presents recent advances in KPFM applied to biological samples and provides a critical perspective on current limitations and future directions for
Ehsan Rahimi, Mario Palacios‐Corella, Arjan Mol, Salvador Pané, Josep Puigmartí‐Luis   +4 more
wiley   +1 more source

Distinguishing magnetic and electrostatic interactions by a Kelvin probe force microscopy–magnetic force microscopy combination

Beilstein Journal of Nanotechnology, 2011
The most outstanding feature of scanning force microscopy (SFM) is its capability to detect various different short and long range interactions.
Miriam Jaafar, Oscar Iglesias-Freire, Luis Serrano-Ramón, Manuel Ricardo Ibarra, Jose Maria de Teresa, Agustina Asenjo   +5 more
doaj   +1 more source

Surface-enhanced Raman scattering of graphene caused by self-induced nanogating by GaN nanowire array

, 2017
A constant height of gallium nitride (GaN) nanowires with graphene deposited on them is shown to have a strong enhancement of Raman scattering, whilst variable height nanowires fail to give such an enhancement.
Bożek, Rafał, Drabińska, Aneta, Grzonka, Justyna, Kamińska, Maria, Kaźmierczak, Piotr, Kierdaszuk, Jakub, Klosek, Kamil, Krajewska, Aleksandra, Sobanska, Marta, Wołoś, Agnieszka, Wysmołek, Andrzej, Zytkiewicz, Zbigniew R.   +11 more
core   +1 more source