Article
Engineering, Electrical & Electronic
Kai Niu, Shangdong Zhao, Shaohua Tao, Fuliang Wang
Summary: An optical tweezers-based optofluidic conveyor has been designed to capture and transport multiple micron particles. The conveyor belts can have different shapes with phase values set as phase gradients. In this study, automatic transportation of microparticles with three different conveyor belts was achieved, and the transportation direction was variable. The system allows particles to travel along arbitrary trajectories and has the potential for other optical manipulation tasks.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Electrical & Electronic
Joe Siang Keek, Ser Lee Loh, Shin Horng Chong
Summary: The paper introduces an E-pattern omniwheeled cellular conveyor (EOCC) with a centralized system using camera and image processing techniques, and a unique method for activation of actuators. The analysis of nominal characteristics and the proposal of four controllers evaluate the tracking performance of EOCC in different trajectories.
Article
Engineering, Chemical
Berna Bolat, Birguel Ascioglu Temiztas, Enes Sezer, Alparslan Solak
Summary: Belt sag occurs in belt conveyors during the transportation of bulk material, resulting in the deformation of the belt profile between two successive idlers. To investigate its effects on conveyor capacities and belt sag at different conveyor angles, the Discrete Element Method (DEM) and Finite Element Method (FEM) are coupled, and the data transfer between the methods is repeated iteratively. The results show that the normal forces of bulk material and belt sag increase as the data transfer is repeated. Capacities at conveyor angles higher than 15 degrees increase, while lower angles are not affected. The study concludes that repeated data transfer should be employed in numerical applications aiming to acquire the belt sag and capacity for high conveyor angles.
Article
Quantum Science & Technology
Jessie T. Zhang, Lewis R. B. Picard, William B. Cairncross, Kenneth Wang, Yichao Yu, Fang Fang, Kang-Kuen Ni
Summary: Researchers have extended the molecular assembly technique to an array of five molecules, enabling control and manipulation of multiple molecules and unlocking the ability to study molecular interactions. They have outlined the technical challenges and solutions inherent in scaling up this system, providing a platform to utilize the vast resources and long-range dipolar interactions of molecules.
QUANTUM SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Daniel Vala, Martin Micica, Daniel Cvejn, Kamil Postava
Summary: Spectroscopic Mueller matrix ellipsometry is a widely used technique that offers reliable and non-destructive analysis of various samples by tracking polarization-related physical properties. By combining it with a physical model, it can provide precise measurements and versatile applications. However, its interdisciplinary adoption is limited and it is often overshadowed by other techniques. In this study, Mueller matrix ellipsometry is applied to chiroptical spectroscopy to analyze the optical activity of a saccharides solution. The method is validated by studying the rotatory power of glucose, fructose, and sucrose, and it is further used to determine mutarotation rate constants and gyration tensor of glucose anomers.
Article
Optics
Chi Zhang, Min Jiang, Yao Chang, Yang Liu, Guanghui Wang, Fei Xu, Yanqing Lu
Summary: This Letter proposes a novel metasurface conveyor belt using arrays of gold plasmonic elliptical elements for trapping, transporting, and sorting particles. By switching the polarization of the excitation beam, the elements can be continuously lit, providing a larger trapping area. The design offers a new scheme for particle sorting in optofluidic applications.
Article
Engineering, Multidisciplinary
Piotr Bortnowski, Witold Kawalec, Robert Krol, Maksymilian Ozdoba
Summary: This article measures the vibration frequency of a working conveyor and determines the increase in tension force on the top belt strand using the phenomenon of belt vibration, validating an accurate method for predicting belt vibrations.
Article
Engineering, Multidisciplinary
Prosenjit Banerjee, Debashish Chakravarty, Biswajit Samanta
Summary: This paper discusses the design and implementation of a laboratory-based AOI system for monitoring the surface condition of conveyor belt segments. The system utilizes a low-cost web camera and a line laser projection device to capture color and depth images of the belt surface. A factorial experimental design is used to examine the impact of different inspection parameters on the measurement error percentage of the AOI system. The optimal settings are found to be an imaging distance of 60 cm, a field of view of 75, illumination of 0 lux, an inspection speed of 9 cm/s, and a camera frame rate of 75 frames per second.
Article
Engineering, Multidisciplinary
Leopold Hrabovsky, Vieroslav Molnar, Gabriel Fedorko, Jozef Tkac, Karel Frydrysek
Summary: This paper introduces the principle of operation of sandwich conveyors and the interaction forces between pressure rollers and conveyor belts. It also proposes a measurement system that uses experimental measurements to determine the magnitude of forces. The results can be applied for online monitoring and failure analysis of these types of transport systems.
Article
Optics
Chunyan Bai, Xiangcai Ma, Qian Cao, Saima Kanwal, Peizhen Qiu
Summary: A multichannel nano-optical conveyer based on a rectangular distributed grating array is proposed in this study. By adjusting the phase difference of the excitation beams, multiple optical traps and parallel transport channels can be generated. Simulation and calculation results demonstrate that 20 nm metallic nanoparticles can be stably attracted to the traps and dynamically transported along channels by adjusting the phase of the excitation beams. Compared to existing nano-photon conveyors, this design offers a straightforward structure and exceptional performance, providing a promising new approach to particle manipulation.
Article
Engineering, Geological
Jorge Benedi, Gunter H. Just, Matthew J. Roy, Katharine L. Smith
Summary: An analytical model based on terrestrial auger conveyor industry guidelines is proposed to predict the behavior and performance parameters of an auger conveyor system in different initial conditions. The model is validated using published experimental data and provides more accurate predictions compared to previous methods.
Review
Chemistry, Multidisciplinary
Ying-Li Shi, Xue-Dong Wang
Summary: 1D organic micro/nanostructures (OMNSs) based on pi-conjugated molecules are ideal candidates as photonic units due to their unique photophysical advantages. Although they have broad application prospects in photonics devices, huge challenges remain before they can be actually used as components of optical circuits in photonics chips.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Keiko Kato, Anand B. Puthirath, Ali Mojibpour, Mikhail Miroshnikov, Sitakanta Satapathy, Naresh Kumar Thangavel, Kiran Mahankali, Liangliang Dong, Leela Mohana Reddy Arava, George John, Palash Bharadwaj, Ganguli Babu, Pulickel M. Ajayan
Summary: The study reports a photorechargeable lithium battery using nature-derived organic molecules as both photoactive and lithium storage electrode material, allowing charging through absorption of sunlight of a desired frequency. The dual functionality of the electrode material in both light absorption and lithium storage, with careful selection of optimal bandgap and Li-ion reversible functional groups, is crucial for the progress of solar rechargeable batteries.
Article
Chemistry, Analytical
Zongjie Wang, Dingran Chang, Edward H. Sargent, Shana O. Kelley
Summary: This article introduces an Apta FastZ algorithm that can accelerate the Pro-SELEX workflow by achieving a computing speed of 10 to 40 times faster compared to the original AptaZ algorithm while maintaining identical outcomes. The affinity of myeloperoxidase aptamers predicted by Apta FastZ was validated by experiments, showing a high level of linear correlation with measured affinities.
ANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Analytical
Xindong Wang, Xiaorong Zhang, Dingxin Huang, Tianyu Zhao, Lili Zhao, Xikui Fang, Chunhui Yang, Guanying Chen
Summary: This study presents a high-sensitivity single-nanoparticle-level sensing approach for detecting divalent copper ions using upconversion nanoparticles and Cu2+-dependent DNAzymes. The method achieves a high signal-to-noise ratio at low concentrations and demonstrates efficient biosensing capabilities at the single nanoparticle level.
ANALYTICAL CHEMISTRY
(2021)