Article
Physics, Applied
S. M. Torres, O. Y. Vorobiev, R. E. Robey, M. J. Hargather
Summary: This study investigates the fracture response of geologic materials under explosive loading using a transparent rock surrogate, PMMA. High-speed imaging and PDV were used to capture the shock propagation and fracture growth processes. The experimental results were compared to numerical simulations, showing good agreement in fracture lengths. The simulation analysis revealed that the shock drives the fracture for approximately 20 μs.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Manufacturing
Piljae Joo, Yimin Yao, Nicholas Teo, Sadhan C. Jana
Summary: A 3D-printing process is utilized to manufacture modular aerogel/acrylate bricks, which can be fully customized and scaled for thermal insulation applications. By combining 3D-printing tools with a sol-gel method for aerogel synthesis, the study overcomes the geometric limitations of producing large load-bearing aerogel products. The research focuses on the characteristics of two-component aerogel bricks and discusses the thermal properties and mechanical strength of the bricks in contact heating situations.
ADDITIVE MANUFACTURING
(2021)
Article
Thermodynamics
Junhui Gong, Zhixuan Zhu, Mingrui Zhang, Chunjie Zhai, Xuan Wang
Summary: This study experimentally investigates piloted ignition of vertically mounted solid and analyzes the results using numerical and analytical models. The effects of ignitor position on ignition time and critical ignition parameters are examined. The results show that top ignitor shortens ignition time and reduces critical temperature and critical mass loss rate.
APPLIED THERMAL ENGINEERING
(2022)
Article
Chemistry, Analytical
Olalekan O. Olowo, Bryan Harris, Daniel Sills, Ruoshi Zhang, Andriy Sherehiy, Alireza Tofangchi, Danming Wei, Dan O. Popa
Summary: In this paper, a novel tactile sensor with a fingerprint design, named SkinCell, was proposed. The sensor was fabricated using a custom-built microfabrication platform and characterized under static and dynamic force loading. The results showed that the SkinCell had high spatial resolution and sensitivity, making it suitable for large area skins and fingertip human-robot interaction applications.
Article
Materials Science, Multidisciplinary
Alexander Bardelcik, Steven Yang, Faraz Alderson, Andrew Gadsden
Summary: Different wash treatments were applied to 3D-printed Polymethyl Methacrylate resin samples, with detergent wash resulting in increased toughness. Finite element simulations showed that HP5 + D and As-Printed + D wash conditions have potential applications in energy absorbing octet-truss lattice structures.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Weilong Wu, Qin Ouyang, Liu He, Qing Huang
Summary: In this study, the optical and thermal properties of polymethyl methacrylate (PMMA) were modulated by introducing phenyl and adamantyl substituents through copolymerization. The results provide a new approach for the application of PMMA in deep UV lithography and antireflective coatings.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Review
Materials Science, Multidisciplinary
Leila Zouridi, Ioannis Garagounis, Anastasios Vourros, George E. Marnellos, Vassilios Binas
Summary: This review examines the potential and challenges of using inkjet printing (IJP) in the fabrication processes of solid oxide fuel cells (SOFCs). The key aspects of IJP for SOFCs fabrication, including ink formulation, deposition, optimization, and characterization, are described in detail. The effect of inkjet-printed SOFCs on electrochemical performance is highlighted, demonstrating the overall potential of this fabrication technique. Challenges and opportunities for the future development of this topic are also discussed.
ADVANCED MATERIALS TECHNOLOGIES
(2022)
Review
Polymer Science
Faris A. Alshahrani, Fatemah AlToraibily, Maryam Alzaid, Amr A. Mahrous, Maram A. Al Ghamdi, Mohammed M. Gad
Summary: This study reviewed the literature on the impact of salivary pH on the performance and materials used for removable dental prostheses (RDP). The findings suggest that salivary pH has an effect on RDP materials, with alkaline and acidic pH having the most significant impact. The salivary pH should be considered when selecting materials for RDP fabrication.
Article
Materials Science, Multidisciplinary
Artyom Smirnov, Artem Polushkin, Aleksandra Falchevskaya, Mariia Mikhailova, Hadi Shamkhi, Lev Zelenkov, Tamara Pogosian, Maxim Morozov, Sergey Makarov, Alexandr Vinogradov
Summary: Photonic materials based on metal halide perovskites are rapidly developing due to their unique optical properties and easy synthesis. There is also a growing interest in integrated photonics that can combine multiple elements on a single chip. This study explores the possibility of easily fabricating a simple pair of photonic elements, such as a microresonator and an outcoupling waveguide, using inkjet printing on a glass substrate covered with a layer of polydimethylsiloxane (PDMS). The experimental results demonstrate high laser emission and efficient radiation transfer, indicating potential for implementing integrated photonics with this cost-effective and scalable fabrication method.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Environmental
M. A. Parvez Mahmud, Shahjadi Hisan Farjana
Summary: This study compares the eco-profiles of PET and PMMA production plants, finding that PMMA plants have a larger environmental impact. Recommendations are made for achieving a better environmental profile through optimization and replacing problematic materials, designs, methods, and devices.
JOURNAL OF POLYMERS AND THE ENVIRONMENT
(2021)
Article
Multidisciplinary Sciences
Chandra Kant, Atul Shukla, Sarah K. M. McGregor, Shih-Chun Lo, Ebinazar B. Namdas, Monica Katiyar
Summary: This work demonstrates the successful inkjet printing of large area TADF OLEDs, showing the potential of TADF materials as the emitting layer. The study develops an ink formulation for TADF materials and achieves intricate pattern printing without lithography. The impact of ink viscosity, density, and surface tension on droplet formation and film quality is also investigated, and the potential for large-area roll-to-roll printing on a flexible substrate is demonstrated.
NATURE COMMUNICATIONS
(2023)
Review
Polymer Science
Rupak Dua, Zuri Rashad, Joy Spears, Grace Dunn, Micaela Maxwell
Summary: PEEK is an organic polymer with excellent performance and ease of 3D printing, currently widely used in various fields. 3D-printed PEEK is mainly done through FFF or FDM printers, with most applications still in the research phase, but progressing towards commercialization in various industries.
Article
Engineering, Electrical & Electronic
Mst Moriom Rojy Momota, Bashir I. Morshed, Tamanna Ferdous, Tomoko Fujiwara
Summary: In this study, flexible dry ECG electrodes of different shapes and sizes were developed using inkjet printing technology. Compared to commercial gel electrodes, inkjet printing electrodes have a longer lifetime and lower noise. Inkjet printing allows for personalized shape and size customization of the electrodes through additive manufacturing.
IEEE SENSORS JOURNAL
(2023)
Article
Environmental Sciences
Jingwei Dong, Linqing Li, Qiaoqiao Liu, Mengting Yang, Zheng Gao, Pingkang Qian, Kun Gao, Xiangyuan Deng
Summary: The study showed that PMMA microplastics and salinity variation had negative effects on the growth and photosynthetic activity of Phaeodactylum tricornutum, resulting in significant changes in chlorophyll fluorescence parameters and altered antioxidant enzyme activities.
Article
Thermodynamics
Alain Alonso, David Lazaro, Mariano Lazaro, Daniel Alvear
Summary: Thermal analysis is an efficient technique widely used in various fields, especially in fire science. The boundary conditions of thermal analysis have a significant impact on the study of polymeric materials, particularly in thermal decomposition reactions. The International Confederation for Thermal Analysis and Calorimetry has established standards for thermogravimetry and differential scanning calorimetry, including recommended sample masses. The influence of self-heating on thermal decomposition is analyzed, and suitable boundary conditions for TG/DSC tests on PMMA and LLDPE are determined. The study provides useful recommendations for thermal analysis.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
(2022)
Article
Engineering, Electrical & Electronic
Valentina Palazzi, Ricardo Correia, Xiaoqiang Gu, Simon Hemour, Ke Wu, Alessandra Costanzo, Diego Masotti, Enrico Fazzini, Apostolos Georgiadis, Hooman Kazemi, Ricardo Pereira, Naoki Shinohara, Dominique Schreurs, Jung-Chih Chiao, Alexandru Takacs, Daniela Dragomirescu, Nuno Borges Carvalho
IEEE MICROWAVE MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Firas Fatani, Mohammad Vaseem, Zubair Akhter, Rana Muhammad Bilal, Atif Shamim
Summary: The demand for highly sensitive, environmentally stable, mechanically flexible, and low-cost temperature sensors for on-body measurements has been increasing due to the popularity of personal healthcare-Internet-of-Things (H-IoT) devices. Printed Electronics (PE) is an ideal platform for such sensors as it allows for the production of flexible devices using simple and rapid methods at a relatively low cost. In this article, a custom-made tungsten-doped vanadium dioxide ink-based screen-printed temperature sensor with high resistance temperature coefficient (TCR) and environmental stability is reported. A fluoropolymer-based passivation layer is added to protect the sensor from the environment, and the sensor is integrated with a custom Bluetooth Low Energy (BLE) wireless readout in the form of a wristband.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Kirill Klionovski, Hanguang Liao, Sergey E. E. Bankov, Zubair Akhter, Atif Shamim
Summary: This article presents a planar millimeter-wave slot antenna array with SIW-based horn-reflector feeding. The dimensions of the SIW surface are optimized to minimize the size of the planar horn-reflector feeding, and a dual-slot radiating element is used to avoid scan blindness along the normal direction. Experimental results show that the prototype achieved +/- 17 degrees beam scanning within 16% of the operational frequency range, with no scan blindness along the normal direction.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Yiyang Yu, Zubair Akhter, Atif Shamim
Summary: An antenna-on-chip (AoC) with an artificial magnetic conductor (AMC) surface underneath is proposed to improve radiation efficiency and gain. However, the illumination issue limits the increase in gain with AMC area. To solve this problem, coupling enhancement structures (CESs) utilizing available metal layers are introduced. The proposed AMC-backed AoC with CES shows significant improvements in gain and radiation efficiency compared to a conventional AMC-backed AoC.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Ulan Myrzakhan, Farhan A. Ghaffar, Mohammad Vaseem, Hossein Fariborzi, Atif Shamim
Summary: Describes a completely vialess ferrite substrate-based waveguide phase shifter realized through low-cost inkjet printing technique, which allows the fabrication of a conventional rectangular waveguide on a standard magnetic substrate, improving the RF performance and enabling low-cost integration on printed circuit boards.
IEEE TRANSACTIONS ON MAGNETICS
(2023)
Article
Engineering, Electrical & Electronic
Farhan A. Ghaffar, Noben K. Roy, Atif Shamim
Summary: The increase of 7 GHz in the ISM band around 60 GHz has opened up possibilities for modern wireless applications like 5G. To cater to this large bandwidth, a large bandwidth, planar and high gain Vivaldi antenna design is presented. The antenna design allows for integration on the same conductor layer, mitigating the problem of thin gap between metal layers. The measured results show excellent matching performance and high gain, making it suitable for high data rate applications in a millimeter-wave transceiver system.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Chanfang Cao, Xuanming Zhang, Chaoyun Song, Apostolos Georgiadis, George Goussetis
Summary: Simultaneous wireless information and power transfer (SWIPT) is a game changer for wireless sensing networks (WSNs) and industrial Internet of Things (IoT). A multi-polarization wideband rectenna design is proposed to improve the operational stability and robustness of the receiver in diverse environments.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Biotechnology & Applied Microbiology
Altynay Kaidarova, Nathan R. Geraldi, Rory P. Wilson, Juergen Kosel, Mark G. Meekan, Victor M. Eguiluz, Muhammad Mustafa Hussain, Atif Shamim, Hanguang Liao, Mani Srivastava, Swapnil Sayan Saha, Michael S. Strano, Xiangliang Zhang, Boon S. Ooi, Mark Holton, Lloyd W. Hopkins, Xiaojia Jin, Xun Gong, Flavio Quintana, Adylkhan Tovasarov, Assel Tasmagambetova, Carlos M. Duarte
Summary: Human societies rely on marine ecosystems, which are still experiencing degradation. This article discusses the adaptation of sensors and wearable technology developed for humans to improve marine monitoring. It highlights the barriers to transitioning this technology from land to sea, updates on sensor developments for ocean observation, and advocates for wider use of wearables on marine organisms. The authors propose that widespread use of wearables could contribute to an 'internet of marine life' and inform strategies for marine conservation and restoration.
NATURE BIOTECHNOLOGY
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Ruiqi Wang, Zubair Akhter, Atif Shamim
Summary: In this paper, the depolarizing Chipless RFID tags based on double-slit split-ring resonators (DSSRR) with single-layer and dual-layer configurations are investigated. The single-layer tag design can exhibit three resonant dips in the cross-polar spectrum with a thin substrate layer. The dual-layer tag design demonstrates four resonant peaks, enabling robust detection on absorptive or reflective platforms in a dynamic environment. An on-body experiment is performed to validate the wearability of the dual-layer tag. Both tags are fabricated through a fully printed process, which is cost-effective and suitable for mass manufacturing.
2023 IEEE RADIO AND ANTENNA DAYS OF THE INDIAN OCEAN, RADIO
(2023)
Article
Computer Science, Information Systems
Qassim Abdullahi, Mohammad Vaseem, Atif Shamim, George Goussetis, Dimitris E. Anagnostou
Summary: This study characterizes vanadium dioxide (VO2) using the time-resolved microwave conductivity (TRMC) method, which is suitable for applications requiring reconfigurable microwave frequency selection. The TRMC method is shown to be flexible in determining the microwave conductivity of thin film compounds of different thicknesses, whether they are phase-changing or non-phase changing. The method utilizes microwave resonant waveguides to examine the changes in microwave conductivity of thermally excited samples in response to microwave-transmitted power, represented by the system's sensitivity factor. The measurements reveal a low regime of microwave conductivity below the transition temperature (Tc) of VO2, associated with dielectric characteristics and shallow trap electron states, and a high thermally triggered microwave conductivity regime above Tc, where longer electron hops enhance charge mobility.
Proceedings Paper
Engineering, Electrical & Electronic
Oludayo Sokunbi, Hussein Attia, Abubakar Hamza, Atif Shamim, Ahmed A. Kishk
Summary: This study presents a low-cost innovative MIMO antenna configuration with minimal separation between the radiating elements and high isolation over a wide frequency band. The use of precisely designed slots on the radiating patches improves interelement isolation throughout the mm-wave band. The proposed self-isolation method achieves elements isolation better than 70 dB with a small inter-element spacing.
2023 INTERNATIONAL MICROWAVE AND ANTENNA SYMPOSIUM, IMAS
(2023)
Article
Engineering, Electrical & Electronic
Ruiqi Wang, Kirill Klionovski, Atif Shamim
Summary: This paper proposes a theoretical model based on annular ring currents to synthesize quasi-isotropic antenna radiation patterns. The model shows that wideband radiation isotropy can be achieved by optimizing the combination of azimuthal currents. Spherical and cubical electrically small antenna designs with wide impedance and radiation isotropy bandwidths exceeding 10% for the GSM900 band are presented in this study.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Ruiqi Wang, Zubair Akhter, Weiwei Li, Atif Shamim
Summary: This work presents a cross-polar dual-layer chipless RFID tag with a ladder-shaped resonator design. The tag can be directly attached to human skin without performance deterioration due to an integrated ground plane. Simulation results show that the ladder-shaped resonator offers advantages such as a strong cross-polar radar cross section, third-order harmonics, and compact size. A fully printed fabrication process makes the proposed tag design suitable for mass production at a low cost.
IEEE JOURNAL OF RADIO FREQUENCY IDENTIFICATION
(2023)
Article
Energy & Fuels
Azamat Bakytbekov, Thang Q. Nguyen, Ge Zhang, Michael S. Strano, Khaled N. Salama, Atif Shamim
Summary: In a future green Internet of Things (IoT) reality, self-powered IoT devices are crucial. This study presents a multi-source energy harvester that collects ambient energy from radio frequency (RF) energy and thermal energy, providing ubiquitous and continuous power for IoT devices.
Article
Engineering, Electrical & Electronic
Kyriaki Niotaki, Nuno Borges Carvalho, Apostolos Georgiadis, Xiaoqiang Gu, Simon Hemour, Ke Wu, Diogo Matos, Daniel Belo, Ricardo Pereira, Ricardo Figueiredo, Henrique Chaves, Bernardo Mendes, Ricardo Correia, Arnaldo Oliveira, Valentina Palazzi, Federico Alimenti, Paolo Mezzanotte, Luca Roselli, Francesca Benassi, Alessandra Costanzo, Diego Masotti, Giacomo Paolini, Aline Eid, Jimmy Hester, Manos M. Tentzeris, Naoki Shinohara
Summary: Radio frequency (RF) energy harvesting and wireless power transmission (WPT) technologies have attracted significant interest in wireless applications and RFID systems. This article provides a historical overview, discusses technical challenges, and presents recent advances in these technologies.
IEEE JOURNAL OF MICROWAVES
(2023)
