Article
Engineering, Electrical & Electronic
Zhidong Chen, Yinshui Xia, Ge Shi, Xiudeng Wang, Huakang Xia, Yidie Ye
Summary: This article proposes a self-powered multi-input serial synchronized switch harvesting on inductor (MIS-SSHI) interface circuit for piezoelectric energy harvesting, which can effectively handle access conflicts between multiple piezoelectric sensors, improve energy conversion efficiency, and achieve a maximum harvested power 3.7 times that of the standard circuit.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Thermodynamics
Jeong Hun Kim, Jae Yong Cho, Jeong Pil Jhun, Gyeong Ju Song, Jong Hyuk Eom, Sinwoo Jeong, Wonseop Hwang, Min Sik Woo, Tae Hyun Sung
Summary: The study introduces a smart pen piezoelectric energy harvester that generates energy during writing, enabling data collection and transmission without batteries. This innovation opens up possibilities for the development of battery-less smart pens.
Article
Computer Science, Information Systems
Shitij Avlani, Dong-Hyun Seo, Baibhab Chatterjee, Shreyas Sen
Summary: This research focuses on the challenges in designing energy-harvested sensor nodes and proposes a perpetually powered sensor node that utilizes energy-information dynamic co-optimization (EICO) to achieve long-range communication and minimize information loss.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Energy & Fuels
Otim Patricia Angwech, Attahiru S. Alfa, B. T. J. Maharaj
Summary: Wireless sensor networks face challenges in energy management, and energy harvesting is proposed as an alternative to traditional battery sources. This study investigates the performance of individual nodes and addresses the issue of threshold management in the energy buffer. The results show a trade-off between threshold and leakage rate.
Article
Computer Science, Theory & Methods
Jie Wan, Ji Chen
Summary: A reasonable relay selection algorithm for energy collection wireless sensor networks is proposed, which optimizes cooperation probability and selects optimal node based on multiple criteria to save energy consumption and prolong network lifetime significantly.
FUTURE GENERATION COMPUTER SYSTEMS-THE INTERNATIONAL JOURNAL OF ESCIENCE
(2022)
Article
Computer Science, Information Systems
Laihu Peng, Yubao Qi, Jianting Liu, Yuan Sun, Hongfei Zu, Xin Ru
Summary: This study designed and demonstrated a dual-piezoelectric energy harvesting system, driven by a cantilever beam and featuring a multipoint energy harvesting strategy. The research found that the dual-piezoelectric energy harvesting device has a higher energy harvesting efficiency than single-piezoelectric energy harvesting devices.
Article
Engineering, Electrical & Electronic
Kechen Zheng, Xiaoying Liu, Biao Wang, Haifeng Zheng, Kaikai Chi, Yuan Yao
Summary: This paper investigates energy management in a wireless-powered communication network and proposes a method to dynamically adjust energy transfer mechanism based on the energy states and geographic locations of sensor nodes. By comparing the energy harvesting and data transmission ranges, the network topology is divided into two cases for throughput analysis, which ultimately proves the existence of an optimal energy threshold, enhancing the achievable throughput.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Review
Energy & Fuels
Ruben Hidalgo-Leon, Javier Urquizo, Christian E. Silva, Jorge Silva-Leon, Jinsong Wu, Pritpal Singh, Guillermo Soriano
Summary: Intelligent buildings play a fundamental role in achieving efficient energy management and reducing carbon emissions. However, they also impose challenges in energy use. This paper provides a comprehensive review of energy harvesting technologies and explores their potential to power or support sensor nodes in buildings. The research findings demonstrate that energy harvesters can partially or fully meet the power requirements of sensor nodes.
Article
Computer Science, Information Systems
Hosein Azarhava, Javad Musevi Niya, Mohammad Ali Tinati
Summary: This paper investigates the resource allocation problem in a NOMA-based Wireless Energy Harvesting Sensor Network (WEHSN) to improve energy efficiency and system throughput. By converting the problem to a parametric form and applying the KKT conditions, a closed-form expression for optimization is derived. Numerical results show that the NOMA-based WEHSN outperforms the OFDMA and TDMA-based methods in terms of energy efficiency and throughput.
COMPUTER COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Hailing Fu, Xutao Mei, Daniil Yurchenko, Shengxi Zhou, Stephanos Theodossiades, Kimihiko Nakano, Eric M. Yeatman
Summary: This paper comprehensively reviews the state-of-the-art progress in rotational energy harvesting, including energy characteristics, harvester categories, methodologies, mechanisms, and applications. Key developments, critical challenges, and potential research directions and opportunities are summarized and discussed based on progress to date.
Article
Computer Science, Information Systems
Amina Hentati, Wael Jaafar, Jean-Francois Frigon, Wessam Ajib
Summary: This article investigates an energy-harvesting wireless sensor network for IoT applications, analyzing the impact of capacitor size on violation probability. Results show that there is an optimal capacitor size that minimizes the violation probability, demonstrating a tradeoff between charging speed and transmit power.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Dipak Kumar Sah, Abhishek Hazra, Nabajyoti Mazumdar, Tarachand Amgoth
Summary: This study proposes an efficient routing awareness scheduling (ERAS) algorithm to address the energy shortage and network load issues in wireless sensor networks. The algorithm employs a solar harvesting system as a hierarchical clustering-based routing protocol and utilizes synchronization-based scheduling to improve throughput. The ERAS algorithm performs efficiently while considering various performance matrices, including network lifetime, packet delivery ratio, energy consumption, and network sustainability.
IEEE SENSORS JOURNAL
(2023)
Article
Computer Science, Information Systems
Alexander J. Williams, Matheus F. Torquato, Ian M. Cameron, Ashraf A. Fahmy, Johann Sienz
Summary: This paper surveys the current state of EH technology for small-scale WSNs, covering EH methods, energy storage technologies, and EH system architectures. It aims to accelerate the development of sustainable WSN applications in industry.
Article
Computer Science, Information Systems
Riheng Jia, Xiuling Zhang, Yanju Feng, Tianliang Wang, Jianfeng Lu, Zhonglong Zheng, Minglu Li
Summary: This study developed a deep Q-learning approach for long-term energy collection in self-sustainable sensor networks. Simulation results showed that sensors can intelligently learn to select the best energy collection location, and investigated the impact of system parameters on algorithm performance.
IEEE INTERNET OF THINGS JOURNAL
(2021)
Article
Automation & Control Systems
Kawsar Ali, Daniel J. Rogers
Summary: Deploying energy harvesting-based wireless sensor nodes in challenging environments often means lack of control over node placement and orientation. This article introduces a smart WSN that operates independently of placement and orientation, sharing energy and information among cube faces to maximize energy harvesting and signal transmission.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Chemistry, Physical
Y. K. Ryu, A. Dago, Y. He, F. M. Espinosa, E. Lopez-Elvira, C. Munuera, R. Garcia
Summary: The process combines oxidation scanning probe lithography (o-SPL) and oxygen plasma to fabricate nanoribbon field-effect transistors and nano-constrictions on few-layer MoS2 and MoSe2. The oxygen plasma plays a double role in the process, forming a thin, uniform oxide layer on the flake surface for nanopatterning and thinning down the flake. The process accuracy and robustness enable patterning of sub-10 nm wide constrictions and nanoribbon transistors.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Victor G. Gisbert, Simone Benaglia, Manuel R. Uhlig, Roger Proksch, Ricardo Garcia
Summary: High-speed bimodal AFM was developed to provide high-spatial resolution maps of protein nanomechanics, allowing rapid imaging of the initial stages of collagen self-assembly and identification of four stages of change.
Article
Multidisciplinary Sciences
Jonas Hafner, Simone Benaglia, Filipe Richheimer, Marco Teuschel, Franz J. Maier, Artner Werner, Sebastian Wood, Daniel Platz, Michael Schneider, Klaudia Hradil, Fernando A. Castro, Ricardo Garcia, Ulrich Schmid
Summary: This study demonstrates that the semi-crystalline morphology of ferroelectric copolymer P(VDF-TrFE) significantly influences its Curie transition, involving changes in both crystal symmetry and morphology. Quantitative multi-scale characterizations reveal the complex nature of Curie transition in ferroelectric polymeric materials with an intermixture of crystalline and amorphous regions.
NATURE COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
J. G. Vilhena, Maria Ortega, Manuel R. Uhlig, Ricardo Garcia, Ruben Perez
Summary: This study utilizes molecular dynamics simulations to investigate nanomechanical spectroscopy mapping on single immunoglobulin G, revealing distinct mechanical behaviors at different strain stages. The simulations provide the best spatial resolution, enabling clear differentiation of different regions within a single protein. Challenges and strategies for interpreting such experiments/simulations are discussed to unlock the full potential of nanomechanical spectroscopy mapping.
Article
Chemistry, Analytical
Francisco M. Espinosa, Manuel R. Uhlig, Ricardo Garcia
Summary: Silicon nanowire (SiNW) field-effect transistors (FETs) have been developed as highly sensitive label-free biomolecular sensors. This study combines nanolithography, chemical functionalization, electrical measurements, and molecular recognition methods to correlate the current measured by the SiNW transistor with specific molecular recognition events on its surface.
Review
Chemistry, Multidisciplinary
Ricardo Garcia
Summary: The properties of graphite, few layer, and 2D materials have led to various applications in biosensing, energy storage, and water desalination. This review discusses the recent experimental and theoretical advancements in understanding the structure of water on these materials' surfaces, revealing different layer structures under different conditions and the absence of water molecules near aged material surfaces.
Article
Materials Science, Multidisciplinary
Davide Disnan, Jonas Hafner, Simone Benaglia, Marco Teuschel, Michael Schneider, Ricardo Garcia, Ulrich Schmid
Summary: In this paper, the crystalline morphology and surface characteristics of PVDF were studied, and the ferroelectric and piezoelectric properties of the electro-formed δ-PVDF thin films were analyzed and characterized.
MATERIALS RESEARCH LETTERS
(2023)
Article
Polymer Science
Jonas Hafner, Davide Disnan, Simone Benaglia, Ricardo Garcia, Ulrich Schmid
Summary: The first demonstrations of ferro-and piezoelectricity in solution-processed ferroelectric polymer thin films have stimulated research activities in both academia and industry. These films have been used in memory devices as bistable polarization switches and in (micro-)electromechanical devices as transducers. The fabrication of solution-processed ferroelectric polymer nanocrystals, known as ferroelectric nanomesas, has been demonstrated in this work, and their ferroelectric activity has been verified. Synthesizing self-assembled ferroelectric polymer nanocrystals from polymer solution by spin-casting represents a promising approach for the realization of ferroelectric nanomesas.
Article
Chemistry, Multidisciplinary
Victor G. Gisbert, Francsico M. Espinosa, Juan G. Sanchez, Maria Concepcion Serrano, Ricardo Garcia
Summary: The nanomechanical response of a cell is influenced by the frequency at which the cell is probed. At low frequencies or velocities, the response is dominated by the mechanical properties of the cell surface, while at high frequencies or velocities, the response is dominated by the hydrodynamic drag of the cytosol. Softening and fluidization do not involve structural remodeling, but rather a redistribution of stress between the solid and liquid-like elements of the cell.
Article
Nanoscience & Nanotechnology
Sofia Drakopoulou, Mauro Murgia, Cristiano Albonetti, Simone Benaglia, Francesco Borgatti, Michele Di Lauro, Michele Bianchi, Pierpaolo Greco, David Papo, Ricardo Garcia, Andrea Alessandrini, Fabio Biscarini
Summary: A growth mode of pentacene thin films is discovered that exhibits varying morphology between rough 3D films and smooth 2D films as the thickness increases. The roughness and thickness exhibit coherent oscillations, with increasing amplitude and wavelength as multiples of 1.5 ML thickness. These oscillations are attributed to dynamic wetting/dewetting transitions in the upper layers of the pentacene film. The transconductance of organic field effect transistors also exhibits oscillations, with charge mobilities reaching high values in the wetting regime.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Victor G. Gisbert, Ricardo Garcia
Summary: Amplitude modulation (tapping mode) AFM is the most versatile mode for nanoscale imaging of surfaces in air and liquid. However, estimating the forces and deformations exerted by the tip remains challenging. A new simulator environment called dForce 2.0 is introduced to predict observables in tapping mode AFM experiments. This simulator incorporates contact mechanics models to describe the properties of ultrathin samples, allowing for accurate force determination on various materials.
Article
Chemistry, Multidisciplinary
Victor G. Gisbert, Ricardo Garcia
Summary: High-spatial resolution mapping of van der Waals forces is relevant in various fields and can be achieved using an atomic force microscope operated in a bimodal configuration. This method enables fast, quantitative, and high-resolution mapping of the Hamaker constant of interfaces, as demonstrated in the study.
Article
Chemistry, Multidisciplinary
Diana M. Arvelo, Manuel R. Uhlig, Jeffrey Comer, Ricardo Garcia
Summary: This study investigated the evolution of the graphite-water interface using 3D AFM and found the presence of short-lived hydration layers followed by stable molecular layers. Molecular dynamics calculations supported the experimental observations.
Article
Chemistry, Multidisciplinary
Simone Benaglia, Sofia Drakopoulou, Fabio Biscarini, Ricardo Garcia
Summary: Understanding the interplay between the nanomechanical properties and electronic properties of organic electronic materials is crucial for developing sensors and transducers for various applications. In this study, bimodal AFM was used to investigate the nanomechanical and structural properties of a poly(3,4-ethylenedioxythiophene):poly(styrene-sulfonate) (PEDOT:PSS) thin film during operation as a microelectrode in an electrolyte solution. It was observed that the film swelled in aqueous solution and the modulus significantly decreased after applying a sequence of doping/de-doping bias cycles.
Article
Engineering, Aerospace
Julien Weiss, Ben Steinfurth, Leo Chamard, Alain Giani, Philippe Combette
Summary: Spectral proper orthogonal decomposition (SPOD) is used to investigate the low-frequency behavior of a pressure-induced turbulent separation bubble (TSB). The SPOD spectrum indicates low-rank behavior for frequencies below 10 Hz, and a low-order model constructed with only the first SPOD mode at each frequency reveals the contracting and expanding behavior of the TSB. A comparison between SPOD and space-only proper orthogonal decomposition (POD) shows that both methods can capture the low-frequency breathing motion, but SPOD has the advantage of expressing the frequency range amenable to low-rank behavior.
