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
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
Chemistry, Applied
Chenfeng Ji, Ziyi Zhang, Baihui Zhang, Jinrui Chen, Rongyu Liu, Dongxue Song, Wenlan Li, Na Lin, Xiang Zou, Jin Wang, Shoudong Guo
Summary: A novel glucan PSPP-1 was purified from the foot tuber of purple sweet potato, with a backbone composed of alpha-D-Glcp residues and branching at different positions with alpha-D-Glcp residues. Various experiments revealed its amorphous form, microstructure, particle size, and inhibitory activities on different cells. The findings contribute to understanding the structural characteristics and potential applications of sweet potato polysaccharides.
CARBOHYDRATE POLYMERS
(2021)
Article
Multidisciplinary Sciences
Jack Walker, Jamal Umer, Mahdi Mohammadpour, Stephanos Theodossiades, Stephen R. Bewsher, Guenter Offner, Hemant Bansal, Michael Leighton, Michael Braunstingl, Heinz-Georg Flesch
Summary: Using an atomic force microscope, a nanoscale wear characterization method was applied to a commercial steel substrate AISI 52100, revealing two wear mechanisms: atom attrition and elastoplastic ploughing. The study found that the length-scale effect of the material's hardness property plays an integral role in the relationship between the 'degree of wear' and load.
PROCEEDINGS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES
(2021)
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
Materials Science, Multidisciplinary
Xiaodong Zhu, Jiajun Li, Huibing Yang, Fengbo Zhu, Zhaoyi Guo, Kun Huang, Pengjie Hang, Tao Chen, Xuegong Yu, Deren Yang
Summary: Silicon nanomembrane (SiNM) is a flexible and compatible material for nanoelectrical devices. Mechanical measurement of the nanoscale SiNM reveals that the suspended area greatly affects the Young's modulus.
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS
(2023)
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
Pharmacology & Pharmacy
Kouya Kimoto, Kento Ohashi, Yasunori Iwao, Masatoshi Karashima, Katsuhiko Yamamoto, Toshiro Fukami, Yukihiro Ikeda
Summary: In this study, we investigated the use of atomic force microscopy (AFM) to discern the individual mechanical properties of amorphous and crystalline drugs. The results showed that the elastic modulus can quantitatively distinguish between the amorphous and crystalline states and reflect the difference in preparation methods. AFM measurements using elastic modulus can provide an effective analytical tool for microscale mapping and characterization of amorphous surfaces.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
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
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
Energy & Fuels
Zhi-Xuan Zhu, Lin Li, Jia-Wei Liu, Jia Chen, Zhong-Zheng Xu, Yi-Ning Wu, Cai-Li Dai
Summary: "The mechanical strength of dispersed particle gel (DPG) has a significant impact on its macro plugging performance, but there is limited research on this aspect. In this study, DPG particles with different mechanical strengths were obtained by shearing bulk gels with different formulations. The Young's moduli of the DPG particles on micro and nano scales were measured using an atomic force microscope for the first time. The relationship between the formulation of the bulk gel, the Young's moduli of the DPG particles, and the final plugging performance was established. The results showed that within a certain range, increasing the Young's moduli of the DPG particles from 82 Pa to 328 Pa led to a significant increase in the plugging rate due to enhanced stacking density and strength. However, when the Young's moduli of the DPG particles exceeded 328 Pa, the further increase in plugging rate became insignificant. These findings suggest that adjusting the Young's moduli of the DPG particles within certain ranges is more efficient for improving the plugging rate, providing guidance for the macroscopic application of DPG systems in regulating reservoir heterogeneity."
Article
Construction & Building Technology
Yun Chen, Yueqin Hou, Xiaoping Ji, Haiwei Zou, Cong Dai, Bo Chen
Summary: In this study, the micromechanical properties of aggregates were investigated using an atomic force microscope. It was found that the surface energy of aggregates is influenced by their chemical composition, and the surface energy changes differently after limewater treatment.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Automation & Control Systems
Yijie Liu, Xuexuan Li, Lin Ge, Zhen Zhang
Summary: This article introduces a novel ultralarge-area stitchless scanning probe lithography (SPL) and high-throughput in situ characterization system. The system utilizes a scanning probe microscope to generate patterns and nanoscale structures, with a maximum scanning area of 2 x 2 mm. Through an optimized control method, high-bandwidth and high-precision trajectory tracking is achieved. Experimental results demonstrate high nanolithography speed and in situ characterization throughput, opening up new avenues for ultralarge-area nanofabrication and in situ characterization research and applications.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2023)
Article
Polymer Science
Nai-Chia Teng, Aditi Pandey, Wei-Hsin Hsu, Ching-Shuan Huang, Wei-Fang Lee, Tzu-Hsin Lee, Thomas Chung-Kuang Yang, Tzu-Sen Yang, Jen-Chang Yang
Summary: This study demonstrates a significant enhancement in the rehardening potential of surface-etched enamels through a novel combination of γ-PGA and nano-HAp, showing promising preventive effects against tooth decay.
Article
Chemistry, Analytical
Mei Liu, Weilin Su, Xiangzheng Qin, Kai Cheng, Wei Ding, Li Ma, Ze Cui, Jinbo Chen, Jinjun Rao, Hangkong Ouyang, Tao Sun
Summary: In this study, ZnO nanomaterials were characterized using atomic force microscope (AFM) and nanomanipulator embedded in scanning electron microscope (SEM), observing surface morphology, mechanical properties, and electrical characteristics. A two-probe strategy for piezoelectric property measurement was proposed. Experimental results provide insights into ZnO manipulation and characterization criteria.
