Micromachines最新文献_第3页

The Study of the Transient Dose Rate Effect on ROIC Pixels in Ultra-Large-Scale Infrared Detectors. 超大规模红外探测器中ROIC像元的瞬态剂量率效应研究。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-12 DOI: 10.3390/mi16060700

Yuan Liu, Bin Wang, Ziyuan Tang, Mengwei Chen, Hui Wang, Weitao Yang, Longsheng Wu

{"title":"The Study of the Transient Dose Rate Effect on ROIC Pixels in Ultra-Large-Scale Infrared Detectors.","authors":"Yuan Liu, Bin Wang, Ziyuan Tang, Mengwei Chen, Hui Wang, Weitao Yang, Longsheng Wu","doi":"10.3390/mi16060700","DOIUrl":"10.3390/mi16060700","url":null,"abstract":"Infrared image sensors are crucial across various industries. However, with technological advancements, the growing scale of infrared image sensors has made the impact of transient dose rate effects increasingly significant. It is necessary to conduct relevant radiation effect studies to provide the theoretical and data basis for future radiation-hardened design. This study explores the response of large-area N-wells in the readout circuit of infrared detectors to transient dose rate effects. The TCAD simulation results indicate that the expansive N-well area in the merged-design pixel units generates significant current pulses when exposed to gamma-ray irradiation. Specifically, at dose rates of 3 × 1011 rad/s, 5 × 1011 rad/s, 7 × 1011 rad/s, and 9 × 1011 rad/s, the pulse currents measured are 39 nA, 64 nA, 89 nA, and 119 nA, respectively. Due to the spatial constraints of the 55 nm merged design, the close proximity of the GND to the N-well creates a high potential barrier near the N-well, obstructing the path between the GND and the substrate, which results in the pulse current exhibiting a stepped-like characteristic.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195224/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506539","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design and Optimization of a Tapered Magnetic Soft Continuum Robot for Enhanced Navigation in Cerebral Vasculature. 增强脑血管导航的锥形磁软连续体机器人的设计与优化。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-12 DOI: 10.3390/mi16060701

Jiahang Wang, Yuhang Liu, Xiwen Lu, Yunlong Zhu, Chenyao Bai

{"title":"Design and Optimization of a Tapered Magnetic Soft Continuum Robot for Enhanced Navigation in Cerebral Vasculature.","authors":"Jiahang Wang, Yuhang Liu, Xiwen Lu, Yunlong Zhu, Chenyao Bai","doi":"10.3390/mi16060701","DOIUrl":"10.3390/mi16060701","url":null,"abstract":"Magnetic soft continuum robots (MSCRs) have broad application advantages in vascular intervention; however, current MSCRs still face challenges in navigating the narrower and tortuous structure of the cerebral vasculature. To address this challenge, we propose a tapered MSCR (T-MSCR), which is designed to facilitate smooth navigation through microvascular structures via its miniature tip. Specifically, to optimize its bending ability, we combine the Gray Wolf Optimizer (GWO) with the Euler-Bernoulli beam theory and introduce a Discrete GWO (DGWO) approach to optimize the distribution of magnetic particles within the T-MSCR. We then demonstrate the optimization process of the T-MSCR's bending ability, comparing and analyzing its deflection angle and deformation characteristics, highlighting its capability to enter microvasculars. Furthermore, we demonstrate the magnetic steering and path selection capabilities of T-MSCR in a two-dimensional vascular model and its navigation performance in real-scale human vascular models. Finally, biocompatibility tests confirm that T-MSCR exhibits no toxicity to human cells, thereby laying a solid foundation for its clinical application. The proposed T-MSCR design and optimization are expected to provide a more efficient and feasible solution for future cerebrovascular interventions.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195137/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506421","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Automatic Mode-Matching Method for MEMS Gyroscope Based on Fast Mode Reversal. 基于快速模式反转的MEMS陀螺仪模式自动匹配方法。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-12 DOI: 10.3390/mi16060704

Feng Bu, Bo Fan, Rui Feng, Ming Zhou, Yiwang Wang

{"title":"Automatic Mode-Matching Method for MEMS Gyroscope Based on Fast Mode Reversal.","authors":"Feng Bu, Bo Fan, Rui Feng, Ming Zhou, Yiwang Wang","doi":"10.3390/mi16060704","DOIUrl":"10.3390/mi16060704","url":null,"abstract":"Processing errors can result in an asymmetric stiffness distribution within a microelectromechanical system (MEMS) disk resonator gyroscope (DRG) and thereby cause a mode mismatch and reduce the mechanical sensitivity and closed-loop scale factor stability. This paper proposes an automatic mode-matching method that utilizes mode reversal to obtain the true resonant frequency of the operating state of a gyroscope for high-precision matching. This method constructs a gyroscope control system that contains a drive closed loop, sense force-to-rebalance (FTR) closed loop, and quadrature error correction closed loop. After the gyroscope was powered on and started up, the x- and y-axes were quickly switched to obtain the resonant frequencies of the two axes through a phase-locked loop (PLL), and the x-axis tuning voltage was automatically adjusted to match the two-axis frequency. The experimental results show that the method takes only 5 s to execute, the frequency matching accuracy reaches 0.01 Hz, the matching state can be maintained in the temperature range of -20 to 60 °C, and the fluctuation of the frequency split does not exceed 0.005 Hz.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194808/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506444","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Updated Review of BiCuSeO-Based Thermoelectric Materials. 基于bicuse的热电材料研究进展。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-12 DOI: 10.3390/mi16060703

Haitao Zhang, Bo Feng, Suoluosu Yang, Ruolin Ruan, Rong Zhang, Tongqiang Xiong, Biyu Xu, Zhipeng Zheng, Guopeng Zhou, Yang Zhang, Kewei Wang, Yin Zhong, Yanhua Fan, Xiaoqiong Zuo

{"title":"An Updated Review of BiCuSeO-Based Thermoelectric Materials.","authors":"Haitao Zhang, Bo Feng, Suoluosu Yang, Ruolin Ruan, Rong Zhang, Tongqiang Xiong, Biyu Xu, Zhipeng Zheng, Guopeng Zhou, Yang Zhang, Kewei Wang, Yin Zhong, Yanhua Fan, Xiaoqiong Zuo","doi":"10.3390/mi16060703","DOIUrl":"10.3390/mi16060703","url":null,"abstract":"Since 2010, BiCuSeO has emerged as a captivating subject of investigation within the realm of thermoelectric materials. Its allure lies in a remarkable confluence of characteristics: a distinctive natural super-lattice structure, an elevated Seebeck coefficient, and a low thermal conductivity, all of which have collectively piqued the intense interest of scientists worldwide. Over the subsequent eight-year period, an extensive array of research endeavors has been meticulously carried out, delving deep into the multifaceted properties of BiCuSeO and exploring avenues for performance enhancement. In this comprehensive review, we embark on a detailed exploration of the fundamental properties of BiCuSeO, encompassing its preparation methodologies, as well as its thermoelectric and mechanical attributes. A thorough synthesis of diverse strategies for optimizing the composition and structure of BiCuSeO is presented, elucidating how these modifications contribute to the enhancement of its thermoelectric and mechanical performance. Finally, the current state of research on N-type BiCuSeO is systematically summarized, offering a panoramic view of the advancements and challenges in this particular area.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195016/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Passive Frequency Tunability in Moiré-Inspired Frequency Selective Surfaces Based on Full-Wave Simulation. 基于全波仿真的moir<s:1>激励频率选择表面无源频率可调性。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-12 DOI: 10.3390/mi16060702

Jieun Hwang, Sungcheol Hong

{"title":"Passive Frequency Tunability in Moiré-Inspired Frequency Selective Surfaces Based on Full-Wave Simulation.","authors":"Jieun Hwang, Sungcheol Hong","doi":"10.3390/mi16060702","DOIUrl":"10.3390/mi16060702","url":null,"abstract":"This paper presents a simulation-based investigation of passive frequency tunability in frequency-selective surfaces (FSSs) enabled by Moiré pattern interference. By overlapping two identical hexagonal FSS layers and introducing rotational misalignment between them, we demonstrate that the resulting Moiré patterns induce significant shifts in the resonance frequency without any external bias or active components. Using full-wave simulations in HFSS, we show that rotating the second layer from 0° to 30° can shift the resonant frequency from 4.4 GHz down to 1.2 GHz. This tunable behavior emerges solely from geometrical manipulation, offering a low-complexity alternative to active tuning methods that rely on varactors or micro-electromechanical systems (MEMSs). We discuss the theoretical basis for this tuning mechanism based on effective periodicity modulation via rotational interference and highlight potential applications in passive reconfigurable filters and refractive index sensors. The proposed approach provides a promising route for implementing tunable electromagnetic structures without compromising simplicity, power efficiency, or integration compatibility.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195385/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the Characteristics of the Laser Powder Bed Fusion of SiCp/AlSi10Mg Composites: From a Single Track to a Cubic Block. 激光粉末床熔合SiCp/AlSi10Mg复合材料的特性研究：从单轨到立方块。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-11 DOI: 10.3390/mi16060697

Ying He, Gang Xue, Haifeng Xiao, Haihong Zhu

{"title":"Investigating the Characteristics of the Laser Powder Bed Fusion of SiCp/AlSi10Mg Composites: From a Single Track to a Cubic Block.","authors":"Ying He, Gang Xue, Haifeng Xiao, Haihong Zhu","doi":"10.3390/mi16060697","DOIUrl":"10.3390/mi16060697","url":null,"abstract":"Laser powder bed fusion (LPBF) of SiCp/AlSi10Mg is promising in many industrial fields. In this paper, the characteristics of a 15 wt.% 1200 mesh SiCp/AlSi10Mg metal matrix composite fabricated by LPBF were investigated systematically, i.e., from a single track to a block. It was found that when the laser energy input was high enough, the single track was continuous and not distorted; when the laser energy input was low, the single track was unstable and wrinkled. The densification of the LPBFed composite sample was influenced significantly by the surface morphologies and geometric dimensions of the single tracks. As high as 98.9% relative density was achieved when the optimized processing parameters were used. Because of the good wettability and the interfacial reaction during the process, the interface of SiC and the matrix showed good bonding. Near the interface of SiC and the matrix, needle-shaped phase Al4SiC4 could be found both in the single track and block, and the faceted particle Si was formed in the block because of the interfacial reaction. The microhardness of the LPBFed SiCp/AlSi10Mg composites was much higher than that of the LPBFed unreinforced AlSi10Mg. A coefficient of friction of 0.178 and wear rate of 2.02 × 10-4 mm3/(N⋅m) were achieved for the LPBFed composites. The main wear mechanism was delamination wear, accompanied by abrasive wear. The maximum yield strength and ultimate compressive strength were 566.6 MPa and 764.1 MPa, respectively. The fracture mode of the LPBFed composites is mainly brittle fracture. This study provides a theoretical and technical basis for LPBFed SiCp/AlSi10Mg 3D parts.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195477/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506477","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Laser Micromachining for the Nucleation Control of Nickel Microtextures for IR Emission. 激光微加工对镍微织构成核的红外发射控制。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-11 DOI: 10.3390/mi16060696

Tatsuhiko Aizawa, Hiroki Nakata, Takeshi Nasu

引用次数: 0

Compaction-Aware Flash Memory Remapping for Key-Value Stores. 键值存储的压缩感知闪存重映射。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-11 DOI: 10.3390/mi16060699

Jialin Wang, Zhen Yang, Yi Fan, Yajuan Du

{"title":"Compaction-Aware Flash Memory Remapping for Key-Value Stores.","authors":"Jialin Wang, Zhen Yang, Yi Fan, Yajuan Du","doi":"10.3390/mi16060699","DOIUrl":"10.3390/mi16060699","url":null,"abstract":"With the rapid development of big data and artificial intelligence, the demand for memory has exploded. As a key data structure in modern databases and distributed storage systems, the Log-Structured Merge Tree (LSM-tree) has been widely employed (such as LevelDB, RocksDB, etc.) in systems based on key-value pairs due to its efficient writing performance. In LSM-tree-based KV stores, typically deployed on systems with DRAM-SSD storage, the KV items are first organized into MemTable as buffer for SSTables in main memory. When the buffer size exceeds the threshold, MemTable is flushed to the SSD and reorganized into an SSTable, which is then passed down level by level through compaction. However, the compaction degrades write performance and SSD endurance due to significant write amplification. To address this issue, recent proposals have mostly focused on redesigning the structure of LSM trees. We discover the prevalence of unchanged data blocks (UDBs) in the LSM-tree compaction process, i.e., UDBs are written back to SSD the same as they are read into memory, which induces extra write amplification and degrades I/O performance. In this paper, we propose a KV store design in SSD, called RemapCom, to exploit remapping on these UDBs. RemapCom first identifies UDBs with a lightweight state machine integrated into the compaction merge process. In order to increase the ratio of UDBs, RemapCom further designs a UDB retention method to further develop the benefit of remapping. Moreover, we implement a prototype of RemapCom on LevelDB by providing two primitives for the remapping. Compared to the state of the art, the evaluation results demonstrate that RemapCom can reduce write amplification by up to 53% and improve write throughput by up to 30%.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12195135/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy Harvesting from Ankle Flexion During Gait Using Flexible CdS and PVDF Sensors. 利用柔性CdS和PVDF传感器收集步态中踝关节弯曲的能量。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-11 DOI: 10.3390/mi16060698

Kimberly Trevizo, Luis Santana, Manuel Chairez, Amanda Carrillo, Rafael Gonzalez-Landaeta

{"title":"Energy Harvesting from Ankle Flexion During Gait Using Flexible CdS and PVDF Sensors.","authors":"Kimberly Trevizo, Luis Santana, Manuel Chairez, Amanda Carrillo, Rafael Gonzalez-Landaeta","doi":"10.3390/mi16060698","DOIUrl":"10.3390/mi16060698","url":null,"abstract":"In this work, energy was harvested from ankle flexion during gait. For this, two piezoelectric thin films were tested: PVDF and CdS. The PVDF film was a commercial option, and the CdS film was fabricated in our laboratory. Deposition of the CdS film is also reported in this work. Energy harvested during gait from heel strike and ankle flexion was compared. Tests were performed with 10 healthy volunteers walking on a treadmill at 1.2-1.5 km/h. The volunteers wore a sock with piezoelectric films incorporated in the heel and ankle joint (talocrural joint). Tests were performed first with the PVDF film and then with the CdS film. The CdS thin film obtained a d33 coefficient of 1.4928 nm/V, indicating high electrical energy generated from strain-stress. The talocrural joint generated the most energy: 11.359 μJ for the PVDF film and 0.854 μJ for the CdS film. Although the CdS film generated less energy than the commercial option, it was shown that harvesting energy from ankle flexion increased the energy harvested by more than 700% during gait compared to the energy harvested from heel-to-ground impact.","PeriodicalId":18508,"journal":{"name":"Micromachines","volume":"16 6","pages":""},"PeriodicalIF":3.0,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12194990/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144506447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on Simulation Optimization of MEMS Microfluidic Structures at the Microscale. 微尺度MEMS微流控结构仿真优化研究。

IF 3 3区工程技术

Micromachines Pub Date : 2025-06-11 DOI: 10.3390/mi16060695

Changhu Wang, Weiyun Meng

引用次数: 0