Article
Engineering, Electrical & Electronic
Fengtao Yang, Lixin Jia, Laili Wang, Fan Zhang, Binyu Wang, Cheng Zhao, Jianpeng Wang, Christoph Friedrich Bayer, Jan Abraham Ferreira
Summary: Double-sided cooling based on planar packaging method outperforms traditional single-sided cooling based on wire bonds. However, it still faces thermal and electrical challenges in multichip SiC power modules. This article proposes an interleaved planar packaging method to address the optimization contradiction between thermal and electrical performance and enhance the current capability and reliability of power modules.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Dingkun Ma, Guochun Xiao, Tongyu Zhang, Fengtao Yang, Mengyu Zhu, Tianshu Yuan, Liangjun Ma, Yongmei Gan, Laili Wang
Summary: This paper proposes a highly integrated multichip silicon carbide (SiC) MOSFET power module packaging with optimized electrical and thermal performances. The structure of the module is designed to stack the two power switches up and down with the cooling system and the decoupling circuit integrated inside. By optimizing the process flow and designing soldering fixtures, the feasibility of the process and the engineering margin is increased. Experiments and simulations show that the proposed SiC power module has good electrical and thermal performance, with reduced parasitic inductance, eliminated common-mode current, and improved voltage oscillation due to the integration of the decoupling circuit.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Chemistry, Multidisciplinary
Guanglei Zhong, Xuejian Xie, Desheng Wang, Xinglong Wang, Li Sun, Xianglong Yang, Yan Peng, Xiufang Chen, Xiaobo Hu, Xiangang Xu
Summary: A novel Al doping method using p-type SiC powder was proposed for the growth of p-type SiC crystals. The continuity and utilization rate of Al element were greatly improved by using p-type SiC powder, leading to a significant reduction in resistivity and improvement in resistivity uniformity of the crystals.
Article
Materials Science, Ceramics
Xiaoqing Zhao, Ji Zou, Aiyang Wang, Weimin Wang, Zhengyi Fu
Summary: The thermal stability of SiC whiskers on the mechanical properties of composites is crucial. The introduction of a thin Ti3SiC2 coating on SiC whiskers significantly improves their thermal stability at 1600-1700 degrees Celsius.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Xiao Guo, Zeyu Peng, Pengbo Ding, Long Li, Xinyi Chen, Haoyun Wei, Zhen Tong, Liang Guo
Summary: Silicon carbide (SiC), as a leading representative of the third-generation of semiconductors, has excellent physical properties but poses challenges in processing, requiring special techniques such as femtosecond laser machining. SiC shows unprecedented potential for optoelectronic applications, necessitating measurement of its nonlinear optical properties and exploration of its potential applications.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Engineering, Electrical & Electronic
Liping Zhang, Shibin Zhang, Jinbo Wu, Pengcheng Zheng, Hongyan Zhou, Hulin Yao, Zhongxu Li, Kai Huang, Huarui Sun, Xin Ou
Summary: This article introduces the high-performance shear horizontal surface acoustic wave (SH-SAW) and longitudinal leaky SAW (LL-SAW) devices using Lithium Tantalate (LiTaO3) thin films on silicon carbide (SiC) substrate. The demonstrated LTOSiC hetero-substrate achieved exciting results on device frequency, quality factor (Q), temperature coefficient of frequency (TCF), and thermal transport properties. The resonators show scalable resonances and the filters exhibit desirable center frequencies, insertion loss, and out-of-band rejection. Overall, LTOSiC serves as an advanced material platform for acoustic devices in the 5G-frequency range 1 (5G-FR1) bands.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Review
Engineering, Electrical & Electronic
Dereje Woldegiorgis, Md Maksudul Hossain, Zahra Saadatizadeh, Yuqi Wei, H. Alan Mantooth
Summary: Hybrid silicon/silicon carbide switches are gaining attention for high-efficiency energy conversion systems. This article provides a review and comparison of Si/SiC gate control strategies, gate driver solutions, and packaging approaches. It aims to guide the selection of suitable gate control approaches and establish metrics for evaluating gate driver solutions. Additionally, it highlights the need for further research and development in gate control techniques, gate driver approaches, and packaging solutions for hybrid Si/SiC switches.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2023)
Article
Optics
Chengli Wang, Jin Li, Ailun Yi, Zhiwei Fang, Liping Zhou, Zhe Wang, Rui Niu, Yang Chen, Jiaxiang Zhang, Ya Cheng, Junqiu Liu, Chun-Hua Dong, Xin Ou
Summary: Researchers demonstrate the generation of a single soliton microcomb on high-quality-factor microresonators fabricated on 4H-SiC-on-insulator thin films. They also observe wide spectral translation of chaotic microcombs from near-infrared to visible due to the second-order nonlinearity of SiC. This highlights the potential of SiC as a platform for future low-loss integrated nonlinear and quantum photonics.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Otto Cranwell Schaeper, Johannes E. Froch, Sejeong Kim, Zhao Mu, Milos Toth, Weibo Gao, Igor Aharonovich
Summary: This study demonstrates the fabrication of functional photonic devices based on 4H Silicon Carbide using a Faraday cage-based oblique angle etch method. The fabricated suspended microring resonators exhibit high-quality factors, showing potential for enhancing the properties of SiC in integrated on chip quantum photonics in the future.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Automation & Control Systems
Yu Ren, Fan Zhang, Xiaoqing Han, Xu Yang, Wenjie Chen, Mingyu Tian, Lei Wang
Summary: This article discusses the oscillation mechanism in the circuit and establishes small-signal models. An effective damping method is proposed based on stability criterion analysis to improve the stability of the SSCB. Simulation and experimental tests have been conducted to verify the effectiveness of the proposed damping method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Materials Science, Ceramics
Chen Hu, Joseph F. F. Labuz, Takaaki Koyanagi, Jia-Liang Le
Summary: Silicon carbide (SiC) fiber-reinforced SiC matrix (SiC/SiC) composites are being considered as potential materials for fuel claddings in light water reactors. This study presents a probabilistic model for the lifetime distribution of SiC/SiC composites, anchored by a multiaxial stress-based failure criterion and subcritical damage accumulation mechanism. The analysis demonstrates the importance of understanding the static fatigue behavior and length effect on the failure probability of the cladding.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Giovanni Bianchi, Antonio Di Mauro, Luca Ferrari, Sandro Gianella, Alberto Ortona
Summary: This study investigates the production and oxidation behavior of SiC coated Si-SiC tetrakaidekahedron periodic structures at 1500 degrees C. C-SiC lattices were fabricated using 3D printing of polymer templates followed by replica technique and pyrolysis. Submicron SiC particles were successfully deposited onto the C-SiC structures through electrophoretic deposition (EPD) by optimizing voltage, frequency, and duty cycle. Different coating thicknesses were achieved by varying the deposition time. The coated samples were then infiltrated with molten silicon, oxidized at 1500 degrees C, and characterized.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Engineering, Electrical & Electronic
Kevin Rivera, Otto J. Gregory
Summary: Silicon carbide-silicon carbide ceramic matrix composites (SiC-SiC CMC's) are widely used in gas turbine engine hot sections due to their refractory nature and excellent toughness at high temperatures. A novel heat flux sensor has been developed for SiC-SiC CMC based engine components, which can withstand high temperatures. The sensor generates a thermoelectric voltage proportional to the temperature gradient and has a high calibration factor.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Ceramics
Xiaoyang Ji, Zhe Cheng, Ella K. Pek, David G. Cahill
Summary: In this study, the thermal conductance of the oxide layer and the thermal conductivity of SiC/SiC composites were mapped with high spatial resolution using time-domain thermoreflectance (TDTR). It was found that the dominant source of noise in the measurements was the input noise of the preamplifier under low laser powers or small integration time constants. The thermal conductance of the oxide on the fiber region was lower than that on the matrix due to slight differences in thickness and thermal conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Anderson K. Okazaki, Rafael Furlan de Oliveira, Rafael Luiz Heleno Freire, Adalberto Fazzio, Felipe Crasto de Lima
Summary: Researchers have successfully grown two-dimensional arsenic allotropes on an insulating SiC substrate using molecular beam epitaxy. The arsenene has a flat structure and follows the periodicity of the SiC surface. Ab initio simulations based on density functional theory confirm the experimental observations. The strained structure exhibits a new triangular arsenene allotrope rather than the previously predicted honeycomb structure. This strained structure undergoes a Peierls-like transition, resulting in an indirect band gap semiconductor behavior.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Construction & Building Technology
Jiaqi Li, Guoqing Geng, Rupert Myers, Young-Sang Yu, David Shapiro, Carlo Carraro, Roya Maboudian, Paulo J. M. Monteiro
CEMENT AND CONCRETE RESEARCH
(2019)
Article
Materials Science, Ceramics
Ping Cheng, Steven DelaCruz, Dung-Sheng Tsai, Zhongtao Wang, Carlo Carraro, Roya Maboudian
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2019)
Article
Nanoscience & Nanotechnology
Yuhui Xie, Christian Schottle, Ying Li, Carlo Carraro, Xinya Zhang, Alexander Katz, Roya Maboudian
ACS APPLIED MATERIALS & INTERFACES
(2019)
Article
Chemistry, Analytical
Qizhen Zhu, Shiyu Hu, Linqun Zhang, Ying Li, Carlo Carraro, Roya Maboudian, Wei Wei, Anran Liu, Yuanjian Zhang, Songqin Liu
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Multidisciplinary Sciences
Arif Mustafazade, Milind Pandit, Chun Zhao, Guillermo Sobreviela, Zhijun Du, Philipp Steinmann, Xudong Zou, Roger T. Howe, Ashwin A. Seshia
SCIENTIFIC REPORTS
(2020)
Article
Chemistry, Physical
Chuan-Pei Lee, Bayu-Tri Murti, Po-Kang Yang, Francesca Rossi, Carlo Carraro, Roya Maboudian
Summary: A cobalt oxide-decorated silicon carbide nano-tree array electrode was synthesized for micro-supercapacitor applications, showing extremely hydrophilic surface characteristics for enhanced charge transfer at the electrode/aqueous electrolyte interface. The well-standing architecture provided a directional charge transport route along the length of SiC nanowires, leading to excellent areal capacitance and stability in cyclic voltammetry measurements for 2000 cycles at a high scan rate of 150 mV s(-1).
Article
Chemistry, Analytical
Peter E. Beshay, Ali M. Ibrahim, Stefanie S. Jeffrey, Roger T. Howe, Yasser H. Anis
Summary: This paper investigates the dynamics of single cells encapsulated in water-in-oil emulsions in a microchannel, proposing new label-free methods for rare cell detection based on biomechanical properties. The study found that the sheath flow rate has a significant effect on cell dynamics, doubling the cell orbiting speed and potentially doubling the extracted biomechanical information.
Article
Chemistry, Analytical
Ali M. Ibrahim, Jose I. Padovani, Roger T. Howe, Yasser H. Anis
Summary: This paper examines the parameters affecting droplet generation in a microfluidic system, develops a three-dimensional numerical model for simulation, and investigates the impact of different flow rates on droplet size.
Article
Nanoscience & Nanotechnology
Maha Yusuf, George K. Herring, Lars Thorben Neustock, Mohammad Asif Zaman, Usha Raghuram, Vijay K. Narasimhan, Charmaine Chia, Roger T. Howe
Summary: High-contrast alignment marks are essential for precise alignment in X-ray imaging systems. The use of nanostructured black silicon (n-BSi) and optimized deep reactive-ion etching (DRIE) process allows for the fabrication of absorptive areas with low reflectance and high contrast ratio. Systematic variation of polymer deposition time T leads to various nanostructures, ultimately improving the efficiency and precision of alignment marks.
ACS APPLIED NANO MATERIALS
(2021)
Article
Computer Science, Information Systems
Charmaine Chia, Matteo Sesia, Chi-Sing Ho, Stefanie S. Jeffrey, Jennifer Dionne, Emmanuel J. Candes, Roger T. Howe
Summary: Deep neural networks and other machine learning models are widely used for biomedical signal data analysis due to their ability to detect complex patterns and make accurate predictions. However, interpreting these models can be challenging. This paper proposes a logistic regression model with carefully selected features for fast Raman spectroscopy data, achieving comparable accuracy to neural networks while being simpler and more transparent. The analysis involves wavelet features with intuitive chemical interpretations and controlled variable selection using knockoffs. This approach is applicable to other types of signal data where interpretability is important.
IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
(2022)
Article
Engineering, Electrical & Electronic
Mary Tang, Swaroop Kommera, Usha Raghuram, Michelle Rincon, Xiaoqing Xu, Jonathan Fan, Roger T. Howe
Summary: This is a graduate-level laboratory course structured as a master class in project planning and execution. Students work in teams on project topics of their choosing, ideally relevant to their own research areas, utilizing shared facilities. The aim is to develop students' conceptual knowledge of experimental science through project planning and execution, effective communication and teamwork, technical rigor, and peer review.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2023)
Article
Materials Science, Multidisciplinary
David W. Gardner, Jiaqi Li, Martin Kunz, Wei-Chih Liao, Chenhui Zhu, Carlo Carraro, Paulo J. M. Monteiro, Roya Maboudian
Summary: This article investigates the intergrain and intragrain interactions of calciumsilicate-hydrates (C-S-H), nanocrystalline forms of tobermorites, which control the long-term stress response of concrete. Through experiments, it is found that layer stacking disorder significantly increases in 11 angstrom tobermorite powder. Similar results are observed in nanocrystalline C-S-H powders, where layer stacking disorder (in the form of intragrain deformation) increases with low water content and large basal spacing.
Article
Chemistry, Physical
Zhou Li, Chen Liu, Jessica Jane Frick, Adrian K. Davey, Matthew N. Dods, Carlo Carraro, Debbie G. Senesky, Roya Maboudian
Summary: This work presents the synthesis, characterization, and absorption capacity of graphene aerogel loaded with UiO-66-NH2 metal organic framework (MOF). The density-tunable MOF/GA composites were synthesized by adjusting the mass ratio of MOF to graphene oxide (GO) in the starting solution. Scanning electron microscopy (SEM) images and pore size calculations showed that MOF loading affected the macroporous structure of the GA framework but not the mesoporous structure. The MOF loading exhibited minimum density for the 10-30% samples. MOF-30%/GA demonstrated the highest absorption capacity for chloroform among all solvents tested.
Article
Chemistry, Physical
Bowen Zheng, Chen Liu, Zhou Li, Carlo Carraro, Roya Maboudian, Debbie G. Senesky, Grace X. X. Gu
Summary: Graphene aerogel (GA), a 3D carbon-based nanostructure built on 2D graphene sheets, is the lightest solid material ever synthesized. This study systematically investigates the mechanical properties and structural integrity of GA, revealing that smaller and less spherical inclusions during the preparation process are conducive to strength and stiffness but may lead to brittleness. The study also highlights the requirement of a minimum number of bonds per atom for a structurally valid GA in molecular dynamics simulations.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Nanoscience & Nanotechnology
Jose Padovani, Ali M. Ibrahim, Stefanie S. Jeffrey, Yasser H. Anis, Roger T. Howe
MICROFLUIDICS AND NANOFLUIDICS
(2020)