Article
Physics, Fluids & Plasmas
R. Mark Bradley, Patrick D. Shipman
Summary: In this study, the patterns created by scanning an atomic force microscope tip over a polymer surface were investigated using a mesoscopic model. The research discovered that the steady-state solution is only stable below a critical value, beyond which periodic stick-slip motion occurs.
Article
Engineering, Manufacturing
Pengfei Fan, Nirmal Kumar Katiyar, Saurav Goel, Yang He, Yanquan Geng, Yongda Yan, Hui Mao, Xichun Luo
Summary: This paper explores the effects of oblique nanomachining on GaAs machining quality, plasticity, and transport phenomena using atomic scale machining experiments and simulations. The study finds that under oblique cutting conditions, there is an early avalanche of dislocations, lower coefficient of friction, and higher specific cutting energy compared to orthogonal cutting. Through high-resolution transmission electron microscopy examination, it is revealed that plasticity during nanometric cutting of GaAs is facilitated by shuffle-set slip on the {1 1 1} slip system due to the 1 1 0 type dislocation. Overall, oblique cutting is inferred to be the optimal condition for high-quality wafer nanofabrication using an AFM.
JOURNAL OF MANUFACTURING PROCESSES
(2023)
Article
Physics, Applied
Gwangmook Kim, YoungJun Cho, Min-Kyun Cho, Dohun Kim, Wooyoung Shim
Summary: Cantilever-free scanning probe microscopy has potential for high-throughput topography imaging. However, the current imaging mechanism lacks efficiency in detection precision and bandwidth, limiting the application of this measurement system. We present a contact resistance-based imaging system using RF reflectometry, achieving sub-micrometer-scale topography imaging with a resolution of 230 nm and a bandwidth of approximately 8.5 MHz.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Materials Science, Characterization & Testing
Lu Mao, So Fujinami, Wentao Liu, Hao Liu, Ken Nakajima
Summary: This study investigated the systematic errors induced by height-fluctuation using polystyrene beads as the model sample, and made corrections based on the assumption that the components of force and deformation parallel to the sample surface can be approximately ignored. The proposed method was shown to effectively correct the deviations of force and deformation due to height-fluctuations, with reliability of the corrected force curves further verified in the calculation of mechanical properties. Additionally, the correction method allowed for obtaining Young's moduli values without height-gradient dependency, broadening the applications of AFM-based nanomechanical measurements on polymers.
Article
Physics, Applied
Naijian Shen, Debadi Chakraborty, John E. E. Sader
Summary: This article presents an exact analytical theory for the resonant response of rectangular cantilevered plates immersed in viscous fluids, and finite-element simulations are conducted to validate the theory. The results of this study are expected to have practical implications for the design and application of micro- and nano-electromechanical systems.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Analytical
Rui You, Hang Wu, Wei Pang, Xuexin Duan
Summary: This paper presents a gigahertz bulk acoustic streaming tweezer (AST)-based micro-manipulation platform that can precisely and arbitrarily manipulate a single particle's movement. By controlling radio frequency signals, the intensity and direction of the acoustic streaming flow can be adjusted, allowing for versatile particle manipulation. The platform shows promising potential in various applications such as separation, assembly, sensing, and transportation.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Analytical
Luke Oduor Otieno, Bernard Ouma Alunda, Jaehyun Kim, Yong Joong Lee
Summary: Improving the imaging rate of a high-speed atomic force microscope requires specialized hardware and software, with ongoing efforts to enhance general applications. A compact HS-AFM scan-head design with minimal Z-scanner loading is presented in this study as an efficient solution for faster imaging.
Article
Chemistry, Multidisciplinary
Genwang Wang, Ye Ding, Haotian Long, Yanchao Guan, Xiwen Lu, Yang Wang, Lijun Yang
Summary: This paper reports on the simulations of electric and force fields at the tips of metallic probes irradiated by polarized laser output from a scanning near-field optical microscope probe. The results demonstrate that polarized laser can induce nanoscale evanescent fields with high intensity, which effectively move nanoparticles. The paper also discusses schemes with dual probes, showing that different combinations of metallic probes and polarized lasers provide diverse near-field and corresponding optical force.
APPLIED SCIENCES-BASEL
(2022)
Article
Microscopy
Yinan Wu, Yongchun Fang, Zhi Fan, Chao Wang, Cunhuan Liu
Summary: This paper proposes an image correction algorithm based on morphology prediction to effectively eliminate vertical drift of atomic force microscope (AFM) images. It includes designing a Gaussian-Hann filter, developing an adaptive image binarization algorithm, and proposing an advanced morphology prediction algorithm.
Article
Physics, Fluids & Plasmas
Pedro J. Martinez, Enrico Gnecco, Juan J. Mazo
Summary: This study investigates the quantifiable characteristics of wave-like features observed on polymer surfaces when examined with AFM, and demonstrates the presence of ripples and dotted regions under different parameter values. The amplitude, period, and orientation of these features are numerically estimated, revealing a cooperative process involving the scanning of multiple lines leading to the emergence of ripples.
Article
Engineering, Chemical
Chenwei Li, Yating Zhang, Haijun Zhang
Summary: Nanobubbles on the solid surface play a crucial role in the removal of fine coal/minerals from slurry. This study investigates the nucleation process of surface nanobubbles and its effect on particle interaction. The findings reveal that surface hydrophobicity is more important than surface roughness in nanobubbles nucleation. The presence of nanobubbles enhances adhesion force and collision probability, leading to improved removal efficiency in flotation techniques.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Multidisciplinary
Seyede Zahra Mohammadi, Hossein Nejat Pishkenari, Majid Mohammadi Moghaddam, Mohammadreza Sajjadi
Summary: The study introduced a novel strategy based on particle motion mode to control the manipulation process of bio-particles using an atomic force microscope. The control equations consider 6 degrees of freedom, and the manipulation process includes sticking and sliding phases. A simple proportional controller was shown to be able to safely steer particles to their target point without any overshoot.
JOURNAL OF NANOPARTICLE RESEARCH
(2021)
Review
Chemistry, Physical
Andrius Dzedzickis, Juste Rozene, Vytautas Bucinskas, Darius Virzonis, Inga Morkvenaite-Vilkonciene
Summary: This paper provides a systematic review of atomic force microscopy (AFM), focusing on analyzing the available technical solutions and design of different parts, particularly the cantilever. Many recent scientific articles propose innovative AFM control and imaging algorithms, some of which are based on artificial intelligence.
Article
Physics, Applied
D. F. S. Costa, J. L. B. de Araujo, C. L. N. Oliveira, J. S. de Sousa
Summary: This work presents an analytical model for describing atomic force microscopy force curves of standard linear solid and power-law viscoelastic materials, considering the effects of indenter geometry and finite thickness. It is found that conical/pyramidal cantilevers are less affected by finite thickness effects compared to other shapes, such as spherical and flat punch indenters. Finite element modeling of the stress field distribution within the sample confirms this. The study also analyzes systematic errors when analyzing finite thickness samples with an infinite thickness force model, showing that for spherical indenters and indentation depths up to 20% of sample thickness, the mechanical response of viscoelastic materials will inaccurately resemble purely elastic behavior, even within timescales where viscoelastic relaxation should occur.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Multidisciplinary Sciences
Xuanyu Huang, Xiaojian Xiang, Jinghui Nie, Deli Peng, Fuwei Yang, Zhanghui Wu, Haiyang Jiang, Zhiping Xu, Quanshui Zheng
Summary: The article introduces a microscale generator - the Schottky superlubric generator (S-SLG), which can generate high current and power densities while maintaining stable high electrical current density over a long lifetime. Experimental results demonstrate the enduring and virtually unlimited persistence of the S-SLG.
NATURE COMMUNICATIONS
(2021)